#include "../../plugins/Matrix.hpp"
#include "../../include/Storage.hpp"
#include "../../include/StringUtils.hpp"
#include "../../include/NetUtils.hpp"
#include "../../include/Notification.hpp"
#include "../../include/Program.hpp"
#include "../../include/base64_url.hpp"
#include "../../include/Json.hpp"
#include "../../include/AsyncImageLoader.hpp"
#include "../../include/Utils.hpp"
#include <rapidjson/document.h>
#include <rapidjson/writer.h>
#include <rapidjson/stringbuffer.h>
#include <rapidjson/filereadstream.h>
#include <rapidjson/filewritestream.h>
#include <cmath>
#include <fcntl.h>
#include <unistd.h>
#include "../../include/QuickMedia.hpp"

// TODO: Use string assign with string length instead of assigning to c string (which calls strlen)
// Show images/videos inline.
// TODO: Verify if buffer of size 512 is enough for endpoints
// Remove older messages (outside screen) to save memory. Reload them when the selected body item is the top/bottom one.

static const char* SERVICE_NAME = "matrix";
static const char* OTHERS_ROOM_TAG = "tld.name.others";
// Filter without account data
static const char* INITIAL_FILTER = "{\"presence\":{\"limit\":0,\"types\":[\"\"]},\"account_data\":{\"limit\":0,\"types\":[\"\"]},\"room\":{\"state\":{\"not_types\":[\"m.room.related_groups\",\"m.room.power_levels\",\"m.room.join_rules\",\"m.room.history_visibility\"],\"lazy_load_members\":true},\"timeline\":{\"types\":[\"m.room.message\"],\"limit\":1,\"lazy_load_members\":true},\"ephemeral\":{\"limit\":0,\"types\":[\"\"],\"lazy_load_members\":true},\"account_data\":{\"limit\":1,\"types\":[\"m.fully_read\",\"m.tag\",\"qm.last_read_message_timestamp\"],\"lazy_load_members\":true}}}";
static const char* ADDITIONAL_MESSAGES_FILTER = "{\"presence\":{\"limit\":0,\"types\":[\"\"]},\"account_data\":{\"limit\":0,\"types\":[\"\"]},\"room\":{\"state\":{\"not_types\":[\"m.room.related_groups\",\"m.room.power_levels\",\"m.room.join_rules\",\"m.room.history_visibility\"],\"lazy_load_members\":true},\"timeline\":{\"limit\":20,\"lazy_load_members\":true},\"ephemeral\":{\"limit\":0,\"types\":[\"\"],\"lazy_load_members\":true},\"account_data\":{\"limit\":0,\"types\":[\"\"],\"lazy_load_members\":true}}}";
static const char* CONTINUE_FILTER = "{\"presence\":{\"limit\":0,\"types\":[\"\"]},\"account_data\":{\"limit\":0,\"types\":[\"\"]},\"room\":{\"state\":{\"not_types\":[\"m.room.related_groups\",\"m.room.power_levels\",\"m.room.join_rules\",\"m.room.history_visibility\"],\"lazy_load_members\":true},\"timeline\":{\"lazy_load_members\":true},\"ephemeral\":{\"limit\":0,\"types\":[\"\"],\"lazy_load_members\":true},\"account_data\":{\"types\":[\"m.fully_read\",\"m.tag\",\"qm.last_read_message_timestamp\"],\"lazy_load_members\":true}}}";

static std::string capitalize(const std::string &str) {
    if(str.size() >= 1)
        return (char)std::toupper(str[0]) + str.substr(1);
    else
        return "";
}

// TODO: According to spec: "Any tag in the tld.name.* form but not matching the namespace of the current client should be ignored",
// should we follow this?
static std::string tag_get_name(const std::string &tag) {
    if(tag.size() >= 2 && memcmp(tag.data(), "m.", 2) == 0) {
        if(strcmp(tag.c_str() + 2, "favourite") == 0)
            return "Favorites";
        else if(strcmp(tag.c_str() + 2, "lowpriority") == 0)
            return "Low priority";
        else if(strcmp(tag.c_str() + 2, "server_notice") == 0)
            return "Server notice";
        else
            return capitalize(tag.substr(2));
    } else if(tag.size() >= 2 && memcmp(tag.data(), "u.", 2) == 0) {
        return capitalize(tag.substr(2));
    } else if(tag.size() >= 9 && memcmp(tag.data(), "tld.name.", 9) == 0) {
        return capitalize(tag.substr(9));
    } else {
        return "";
    }
}

static std::string extract_first_line_elipses(const std::string &str, size_t max_length) {
    size_t index = str.find('\n');
    if(index == std::string::npos) {
        if(str.size() > max_length)
            return str.substr(0, max_length) + " (...)";
        return str;
    } else if(index == 0) {
        return "";
    } else {
        return str.substr(0, std::min(index, max_length)) + " (...)";
    }
}

namespace QuickMedia {
    static const sf::Vector2i thumbnail_max_size(600, 337);

    static void remove_body_item_by_url(BodyItems &body_items, const std::string &url) {
        for(auto it = body_items.begin(); it != body_items.end();) {
            if((*it)->url == url)
                it = body_items.erase(it);
            else
                ++it;
        }
    }

    static int color_hash_code(const std::string &str) {
        int hash = 0;
        if(str.empty())
            return hash;
        for (char chr : str) {
            hash = ((hash << 5) - hash) + (unsigned char)chr;
        }
        return std::abs(hash);
    }

    static sf::Color user_id_to_color(const std::string &user_id) {
        const int num_colors = 8;
        const sf::Color colors[num_colors] = {
            sf::Color(54, 139, 214),
            sf::Color(172, 59, 168),
            sf::Color(3, 179, 129),
            sf::Color(230, 79, 122),
            sf::Color(255, 129, 45),
            sf::Color(45, 194, 197),
            sf::Color(92, 86, 245),
            sf::Color(116, 209, 44)
        };
        return colors[color_hash_code(user_id) % num_colors];
    }

    UserInfo::UserInfo(RoomData *room, std::string user_id) :
        room(room), display_name_color(user_id_to_color(user_id)), user_id(user_id), resolve_state(UserResolveState::NOT_RESOLVED)
    {
        display_name = user_id;
    }

    UserInfo::UserInfo(RoomData *room, std::string user_id, std::string display_name, std::string avatar_url) :
        room(room), display_name_color(user_id_to_color(user_id)), user_id(std::move(user_id)), resolve_state(UserResolveState::RESOLVED), display_name(std::move(display_name)), avatar_url(std::move(avatar_url)) {
        
    }

    // TODO: Remove this when images are embedded inside the text instead of using the same space as the author
    bool is_visual_media_message_type(MessageType message_type) {
        return message_type == MessageType::VIDEO || message_type == MessageType::IMAGE;
    }

    std::shared_ptr<UserInfo> RoomData::get_user_by_id(const std::string &user_id) {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        auto user_it = user_info_by_user_id.find(user_id);
        if(user_it == user_info_by_user_id.end())
            return nullptr;
        return user_it->second;
    }

    void RoomData::add_user(std::shared_ptr<UserInfo> user) {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        user_info_by_user_id.insert(std::make_pair(user->user_id, user));
    }

    void RoomData::set_user_read_marker(std::shared_ptr<UserInfo> &user, const std::string &event_id) {
        std::lock_guard<std::recursive_mutex> lock(user_mutex);
        user->read_marker_event_id = event_id;
    }

    std::string RoomData::get_user_read_marker(const std::shared_ptr<UserInfo> &user) {
        std::lock_guard<std::recursive_mutex> lock(user_mutex);
        return user->read_marker_event_id;
    }

    std::string RoomData::get_user_display_name(const std::shared_ptr<UserInfo> &user) {
        std::lock_guard<std::recursive_mutex> lock(user_mutex);
        return user->display_name;
    }

    std::string RoomData::get_user_avatar_url(const std::shared_ptr<UserInfo> &user) {
        std::lock_guard<std::recursive_mutex> lock(user_mutex);
        return user->avatar_url;
    }

    void RoomData::set_user_display_name(std::shared_ptr<UserInfo> &user, std::string display_name) {
        std::lock_guard<std::recursive_mutex> lock(user_mutex);
        user->display_name = std::move(display_name);
        if(user->display_name.empty())
            user->display_name = user->user_id;
        user->resolve_state = UserResolveState::RESOLVED;
    }

    void RoomData::set_user_avatar_url(std::shared_ptr<UserInfo> &user, std::string avatar_url) {
        std::lock_guard<std::recursive_mutex> lock(user_mutex);
        user->avatar_url = std::move(avatar_url);
        user->resolve_state = UserResolveState::RESOLVED;
    }

    size_t RoomData::prepend_messages_reverse(const std::vector<std::shared_ptr<Message>> &new_messages) {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        int64_t last_new_message_timestamp = last_message_timestamp;
        size_t num_new_messages = 0;
        for(auto it = new_messages.begin(); it != new_messages.end(); ++it) {
            if(message_by_event_id.find((*it)->event_id) == message_by_event_id.end()) {
                if(message_is_timeline((*it).get()))
                    last_new_message_timestamp = std::max(last_new_message_timestamp, (*it)->timestamp);
                message_by_event_id.insert(std::make_pair((*it)->event_id, *it));
                messages.insert(messages.begin(), std::move(*it));
                ++num_new_messages;
            }
        }
        last_message_timestamp = last_new_message_timestamp;
        return num_new_messages;
    }

    size_t RoomData::append_messages(const std::vector<std::shared_ptr<Message>> &new_messages) {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        int64_t last_new_message_timestamp = last_message_timestamp;
        size_t num_new_messages = 0;
        for(auto it = new_messages.begin(); it != new_messages.end(); ++it) {
            if(message_by_event_id.find((*it)->event_id) == message_by_event_id.end()) {
                if(message_is_timeline((*it).get()))
                    last_new_message_timestamp = std::max(last_new_message_timestamp, (*it)->timestamp);
                message_by_event_id.insert(std::make_pair((*it)->event_id, *it));
                messages.push_back(std::move(*it));
                ++num_new_messages;
            }
        }
        last_message_timestamp = last_new_message_timestamp;
        return num_new_messages;
    }

    std::shared_ptr<Message> RoomData::get_message_by_id(const std::string &id) {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        auto message_it = message_by_event_id.find(id);
        if(message_it == message_by_event_id.end())
            return nullptr;
        return message_it->second;
    }

    std::vector<std::shared_ptr<UserInfo>> RoomData::get_users_excluding_me(const std::string &my_user_id) {
        std::lock_guard<std::recursive_mutex> lock(user_mutex);
        std::vector<std::shared_ptr<UserInfo>> users_excluding_me;
        for(auto &[user_id, user] : user_info_by_user_id) {
            if(user->user_id != my_user_id) {
                users_excluding_me.push_back(user);
            }
        }
        return users_excluding_me;
    }

    void RoomData::acquire_room_lock() {
        room_mutex.lock();
    }

    void RoomData::release_room_lock() {
        room_mutex.unlock();
    }

    const std::vector<std::shared_ptr<Message>>& RoomData::get_messages_thread_unsafe() const {
        return messages;
    }

    const std::vector<std::string>& RoomData::get_pinned_events_unsafe() const {
        return pinned_events;
    }

    bool RoomData::has_prev_batch() {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        return !prev_batch.empty();
    }

    void RoomData::set_prev_batch(const std::string &new_prev_batch) {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        // TODO: Check if this always works and if it also works for other homeservers than synapse
        if(prev_batch.empty() || new_prev_batch < prev_batch)
            prev_batch = new_prev_batch;
    }

    std::string RoomData::get_prev_batch() {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        return prev_batch;
    }

    bool RoomData::has_name() {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        return !name.empty();
    }

    void RoomData::set_name(const std::string &new_name) {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        name = new_name;
    }

    std::string RoomData::get_name() {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        return name;
    }

    bool RoomData::has_avatar_url() {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        return !avatar_url.empty();
    }

    void RoomData::set_avatar_url(const std::string &new_avatar_url) {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        avatar_url = new_avatar_url;
    }

    std::string RoomData::get_avatar_url() {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        return avatar_url;
    }

    void RoomData::set_pinned_events(std::vector<std::string> new_pinned_events) {
        std::lock_guard<std::recursive_mutex> lock(room_mutex);
        pinned_events = std::move(new_pinned_events);
        pinned_events_updated = true;
    }

    std::set<std::string>& RoomData::get_tags_unsafe() {
        return tags;
    }

    void RoomData::clear_data() {
        std::lock_guard<std::recursive_mutex> room_lock(room_mutex);
        std::lock_guard<std::recursive_mutex> user_lock(user_mutex);
        //fetched_messages_by_event_id.clear();
        //userdata = nullptr;
        //user_info_by_user_id.clear();
        size_t i = 0;
        for(auto it = messages.begin(); it != messages.end();) {
            if((*it)->cache) {
                message_by_event_id.erase((*it)->event_id);
                it = messages.erase(it);
                if(i <= messages_read_index)
                    --messages_read_index;
            } else {
                ++it;
            }
            ++i;
        }
        //messages.clear();
        //messages_read_index = 0;
        //message_by_event_id.clear();
        pinned_events.clear();
        tags.clear();
        // TODO: Do this? what if its being used in another thread?
        //body_item.reset();
    }

    MatrixQuickMedia::MatrixQuickMedia(Program *program, Matrix *matrix, MatrixRoomsPage *rooms_page, MatrixRoomTagsPage *room_tags_page, MatrixInvitesPage *invites_page) :
        program(program), matrix(matrix), rooms_page(rooms_page), room_tags_page(room_tags_page), invites_page(invites_page)
    {
        rooms_page->matrix_delegate = this;
        room_tags_page->matrix_delegate = this;
    }

    void MatrixQuickMedia::join_room(RoomData *room) {
        std::lock_guard<std::mutex> lock(room_body_items_mutex);
        std::string room_name = room->get_name();
        if(room_name.empty())
            room_name = room->id;

        auto body_item = BodyItem::create(std::move(room_name));
        body_item->url = room->id;
        body_item->thumbnail_url = room->get_avatar_url();
        body_item->userdata = room; // Note: this has to be valid as long as the room list is valid!
        body_item->thumbnail_mask_type = ThumbnailMaskType::CIRCLE;
        body_item->thumbnail_size = sf::Vector2i(32, 32);
        room->body_item = body_item;
        rooms_page->add_body_item(body_item);
        room_body_item_by_room[room] = body_item;
    }

    void MatrixQuickMedia::leave_room(RoomData *room, LeaveType leave_type, const std::string &reason) {
        std::lock_guard<std::mutex> lock(room_body_items_mutex);
        room_body_item_by_room.erase(room);
        rooms_page->remove_body_item_by_room_id(room->id);
        room_tags_page->remove_body_item_by_room_id(room->id);
        if(leave_type != LeaveType::LEAVE)
            show_notification("QuickMedia", reason);
    }

    void MatrixQuickMedia::room_add_tag(RoomData *room, const std::string &tag) {
        std::lock_guard<std::mutex> lock(room_body_items_mutex);
        room_tags_page->add_room_body_item_to_tag(room_body_item_by_room[room], tag);
    }

    void MatrixQuickMedia::room_remove_tag(RoomData *room, const std::string &tag) {
        std::lock_guard<std::mutex> lock(room_body_items_mutex);
        room_tags_page->remove_room_body_item_from_tag(room_body_item_by_room[room], tag);
    }

    void MatrixQuickMedia::room_add_new_messages(RoomData *room, const Messages &messages, bool is_initial_sync, bool sync_is_cache, MessageDirection message_dir) {
        std::lock_guard<std::mutex> lock(pending_room_messages_mutex);
        auto &room_messages_data = pending_room_messages[room];
        room_messages_data.messages.insert(room_messages_data.messages.end(), messages.begin(), messages.end());
        room_messages_data.is_initial_sync = is_initial_sync;
        room_messages_data.sync_is_cache = sync_is_cache;
        room_messages_data.message_dir = message_dir;
    }

    void MatrixQuickMedia::add_invite(const std::string &room_id, const Invite &invite) {
        std::string invited_by_display_name = invite.invited_by->room->get_user_display_name(invite.invited_by);
        auto body_item = BodyItem::create(invite.room_name);
        body_item->set_description("Invited by " + invited_by_display_name + " (" + invite.invited_by->user_id + ")");
        body_item->url = room_id;
        body_item->thumbnail_url = invite.room_avatar_url;
        body_item->thumbnail_mask_type = ThumbnailMaskType::CIRCLE;
        body_item->thumbnail_size = sf::Vector2i(32, 32);
        body_item->set_timestamp(invite.timestamp);
        invites_page->add_body_item(std::move(body_item));
        if(invite.new_invite)
            show_notification("QuickMedia matrix - " + invite.room_name, "You were invited to " + invite.room_name + " by " + invited_by_display_name + " (" + invite.invited_by->user_id + ")");
    }

    void MatrixQuickMedia::remove_invite(const std::string &room_id) {
        invites_page->remove_body_item_by_room_id(room_id);
    }

    void MatrixQuickMedia::add_unread_notification(RoomData *room, std::string event_id, std::string sender, std::string body) {
        std::lock_guard<std::mutex> lock(room_body_items_mutex);
        Notification notification;
        notification.event_id = std::move(event_id);
        notification.sender = std::move(sender);
        notification.body = std::move(body);
        unread_notifications[room].push_back(std::move(notification));
    }

    static void sort_room_body_items(std::vector<std::shared_ptr<BodyItem>> &room_body_items) {
        #if 0
        std::sort(room_body_items.begin(), room_body_items.end(), [](const std::shared_ptr<BodyItem> &body_item1, const std::shared_ptr<BodyItem> &body_item2) {
            return strcasecmp(body_item1->get_title().c_str(), body_item2->get_title().c_str()) < 0;
        });
        #if 1
        std::sort(room_body_items.begin(), room_body_items.end(), [](const std::shared_ptr<BodyItem> &body_item1, const std::shared_ptr<BodyItem> &body_item2) {
            RoomData *room1 = static_cast<RoomData*>(body_item1->userdata);
            RoomData *room2 = static_cast<RoomData*>(body_item2->userdata);
            int room1_focus_sum = (int)(room1->unread_notification_count > 0) + (int)!room1->last_message_read;
            int room2_focus_sum = (int)(room2->unread_notification_count > 0) + (int)!room2->last_message_read;
            return room1_focus_sum > room2_focus_sum;
        });
        #else
        std::sort(room_body_items.begin(), room_body_items.end(), [](const std::shared_ptr<BodyItem> &body_item1, const std::shared_ptr<BodyItem> &body_item2) {
            return strcasecmp(body_item1->get_title().c_str(), body_item2->get_title().c_str()) < 0;
        });
        #endif
        #endif
        std::sort(room_body_items.begin(), room_body_items.end(), [](const std::shared_ptr<BodyItem> &body_item1, const std::shared_ptr<BodyItem> &body_item2) {
            RoomData *room1 = static_cast<RoomData*>(body_item1->userdata);
            RoomData *room2 = static_cast<RoomData*>(body_item2->userdata);
            int64_t room1_focus_sum = room1->last_message_timestamp;
            int64_t room2_focus_sum = room2->last_message_timestamp;
            return room1_focus_sum > room2_focus_sum;
        });
    }

    void body_set_selected_item(Body *body, BodyItem *selected_item) {
        for(size_t i = 0; i < body->items.size(); ++i) {
            if(body->items[i]->url == selected_item->url) {
                body->select_first_item();
                body->set_selected_item(i, false);
                return;
            }
        }
    }

    void MatrixQuickMedia::update(MatrixPageType page_type) {
        update_pending_room_messages(page_type);
        std::lock_guard<std::mutex> room_body_lock(room_body_items_mutex);
        for(auto &it : unread_notifications) {
            for(auto &unread_notification : it.second) {
                show_notification("QuickMedia matrix - " + unread_notification.sender + " (" + it.first->get_name() + ")", unread_notification.body);
            }
        }
       //if(!unread_notifications.empty()) {
       //    rooms_page->sort_rooms();
       //    room_tags_page->sort_rooms();
        //}
        unread_notifications.clear();
    }

    void MatrixQuickMedia::clear_data() {
        std::lock_guard<std::mutex> lock(pending_room_messages_mutex);
        std::lock_guard<std::mutex> room_body_lock(room_body_items_mutex);
        //room_body_item_by_room.clear();
        //pending_room_messages.clear();
        //rooms_page->clear_data();
        //room_tags_page->clear_data();
        invites_page->clear_data();
        //unread_notifications.clear();
    }

    static std::shared_ptr<Message> get_last_message_by_timestamp(const Messages &messages) {
        #if 0
        return *std::max_element(messages.begin(), messages.end(), [](const std::shared_ptr<Message> &message1, const std::shared_ptr<Message> &message2) {
            return message1->timestamp < message2->timestamp;
        });
        #else
        if(messages.empty())
            return nullptr;
        size_t last_message_index = 0;
        for(size_t i = 1; i < messages.size(); ++i) {
            if(message_is_timeline(messages[i].get()) && messages[i]->timestamp >= messages[last_message_index]->timestamp)
                last_message_index = i;
        }
        if(message_is_timeline(messages[last_message_index].get()))
            return messages[last_message_index];
        return nullptr;
        #endif
    }

    static std::string message_to_room_description_text(Message *message) {
        if(message->type == MessageType::REACTION)
            return "Reacted with: " + extract_first_line_elipses(message->body, 150);
        else if(message->related_event_type == RelatedEventType::REPLY)
            return extract_first_line_elipses(remove_reply_formatting(message->body), 150);
        else if(message->related_event_type == RelatedEventType::EDIT)
            return "Edited: " + extract_first_line_elipses(message->body, 150);
        else
            return extract_first_line_elipses(message->body, 150);
    }

    void MatrixQuickMedia::update_room_description(RoomData *room, Messages &new_messages, bool is_initial_sync, bool sync_is_cache) {
        time_t read_marker_message_timestamp = 0;
        std::shared_ptr<UserInfo> me = matrix->get_me(room);
        std::string my_user_read_marker;
        if(me) {
            my_user_read_marker = room->get_user_read_marker(me);
            auto read_marker_message = room->get_message_by_id(my_user_read_marker);
            if(read_marker_message)
                read_marker_message_timestamp = read_marker_message->timestamp;
        }

        if(read_marker_message_timestamp == 0 || read_marker_message_timestamp < room->read_marker_event_timestamp)
            read_marker_message_timestamp = room->read_marker_event_timestamp;

        std::shared_ptr<Message> last_new_message = get_last_message_by_timestamp(new_messages);
        if(!last_new_message)
            return;

        auto last_message_it = last_message_by_room.find(room);
        if(last_message_it != last_message_by_room.end()) {
            if(last_new_message->timestamp > last_message_it->second->timestamp)
                last_message_it->second = last_new_message;
            else
                last_new_message = last_message_it->second;
        } else {
           last_message_by_room[room] = last_new_message;
        }

        // The event id in encrypted rooms contain the timestamp. Sort by that if possible. Such messages contain a colon.
        // TODO: Test if this also works with construct and other homeservers

        Message *last_unread_message = nullptr;
        if(read_marker_message_timestamp != 0 && last_new_message->timestamp > read_marker_message_timestamp)
            last_unread_message = last_new_message.get();
        else if(read_marker_message_timestamp == 0 && !my_user_read_marker.empty() && last_new_message->event_id.find(':') != std::string::npos && last_new_message->event_id > my_user_read_marker)
            last_unread_message = last_new_message.get();

        if(!last_unread_message && read_marker_message_timestamp == 0)
            last_unread_message = last_new_message.get();

        //assert(room_body_item);
        if(!room->body_item)
            return;

        if(last_unread_message && !sync_is_cache) {
            std::string room_desc = "Unread: " + matrix->message_get_author_displayname(last_unread_message) + ": " + message_to_room_description_text(last_unread_message);
            int unread_notification_count = room->unread_notification_count;
            if(unread_notification_count > 0) {
                room_desc += "\n** " + std::to_string(unread_notification_count) + " unread mention(s) **"; // TODO: Better notification?
                room->body_item->set_description_color(sf::Color(255, 100, 100));
            } else {
                room->body_item->set_description_color(sf::Color(179, 179, 179));
            }
            room->body_item->set_description(std::move(room_desc));
            room->body_item->set_title_color(sf::Color(255, 100, 100));
            room->last_message_read = false;

            rooms_page->move_room_to_top(room);
            room_tags_page->move_room_to_top(room);
        } else if(is_initial_sync) {
            room->body_item->set_description(matrix->message_get_author_displayname(last_new_message.get()) + ": " + message_to_room_description_text(last_new_message.get()));
            room->body_item->set_description_color(sf::Color(179, 179, 179));
        }
    }

    void MatrixQuickMedia::update_pending_room_messages(MatrixPageType page_type) {
        std::lock_guard<std::mutex> lock(pending_room_messages_mutex);
        bool is_window_focused = program->is_window_focused();
        RoomData *current_room = program->get_current_chat_room();
        for(auto &it : pending_room_messages) {
            RoomData *room = it.first;
            auto &messages = it.second.messages;
            bool is_initial_sync = it.second.is_initial_sync;
            //auto &room_body_item = room_body_item_by_room[room];
            //std::string room_desc = matrix->message_get_author_displayname(it.second.back().get()) + ": " + extract_first_line_elipses(it.second.back()->body, 150);
            //room_body_item->set_description(std::move(room_desc));

            if(!it.second.sync_is_cache && it.second.message_dir == MessageDirection::AFTER && !is_initial_sync) {
                for(auto &message : messages) {
                    if(message->notification_mentions_me) {
                        // TODO: What if the message or username begins with "-"? also make the notification image be the avatar of the user
                        if((!is_window_focused || room != current_room || page_type == MatrixPageType::ROOM_LIST) && message->related_event_type != RelatedEventType::EDIT && message->related_event_type != RelatedEventType::REDACTION)
                            show_notification("QuickMedia matrix - " + matrix->message_get_author_displayname(message.get()) + " (" + room->get_name() + ")", message->body);
                    }
                }
            }

            update_room_description(room, messages, is_initial_sync, it.second.sync_is_cache);
        }
        pending_room_messages.clear();
    }

    MatrixRoomsPage::MatrixRoomsPage(Program *program, Body *body, std::string title, MatrixRoomTagsPage *room_tags_page, SearchBar *search_bar) : Page(program), body(body), title(std::move(title)), room_tags_page(room_tags_page), search_bar(search_bar) {
        if(room_tags_page)
            room_tags_page->set_current_rooms_page(this);
    }

    MatrixRoomsPage::~MatrixRoomsPage() {
        if(room_tags_page)
            room_tags_page->set_current_rooms_page(nullptr);
    }

    PluginResult MatrixRoomsPage::submit(const std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        (void)title;
        auto chat_page = std::make_unique<MatrixChatPage>(program, url, this);
        chat_page->matrix_delegate = matrix_delegate;
        result_tabs.push_back(Tab{nullptr, std::move(chat_page), nullptr});
        return PluginResult::OK;
    }

    void MatrixRoomsPage::on_navigate_to_page(Body *body) {
        if(search_bar)
            body->filter_search_fuzzy(search_bar->get_text());
        //sort_room_body_items(body->items);
    }

    void MatrixRoomsPage::update() {
        {
            std::lock_guard<std::mutex> lock(mutex);
            int prev_selected_item = body->get_selected_item();
            if(clear_data_on_update) {
                clear_data_on_update = false;
                body->clear_items();
            }

            if(!pending_remove_body_items.empty() || !room_body_items.empty()) {
                sort_on_update = true;
                filter_on_update = true;
            }

            for(const std::string &room_id : pending_remove_body_items) {
                remove_body_item_by_url(body->items, room_id);
                // TODO: There can be a race condition where current_chat_page is set after entering a room and then we will enter a room we left
                if(current_chat_page && current_chat_page->room_id == room_id) {
                    program->set_go_to_previous_page();
                    body->select_first_item();
                    current_chat_page = nullptr;
                }
            }

            pending_remove_body_items.clear();
            body->set_selected_item(prev_selected_item, false);
            body->clamp_selection();
            body->append_items(std::move(room_body_items));
        }
        if(sort_on_update) {
            sort_on_update = false;
            //BodyItem *selected_item = body->get_selected();
            sort_room_body_items(body->items);
            //body_set_selected_item(body, selected_item);
        }
        matrix_delegate->update(MatrixPageType::ROOM_LIST);
        if(filter_on_update) {
            filter_on_update = false;
            if(search_bar)
                body->filter_search_fuzzy(search_bar->get_text());
            //sort_room_body_items(body->items);
        }
    }

    void MatrixRoomsPage::add_body_item(std::shared_ptr<BodyItem> body_item) {
        std::lock_guard<std::mutex> lock(mutex);
        room_body_items.push_back(body_item);
    }

    void MatrixRoomsPage::move_room_to_top(RoomData *room) {
        // Swap order of rooms in body list to put rooms with mentions at the top and then unread messages and then all the other rooms
        // TODO: Optimize with hash map instead of linear search? or cache the index
        std::lock_guard<std::mutex> lock(mutex);
#if 0
        int room_body_index = body->get_index_by_body_item(room->body_item.get());
        if(room_body_index != -1) {
            std::shared_ptr<BodyItem> body_item = body->items[room_body_index];
            int body_swap_index = -1;
            if(room->unread_notification_count > 0)
                body_swap_index = find_top_body_position_for_mentioned_room(body->items, body_item.get());
            else if(!room->last_message_read)
                body_swap_index = find_top_body_position_for_unread_room(body->items, body_item.get());
            if(body_swap_index != -1 && body_swap_index != room_body_index) {
                body->items.erase(body->items.begin() + room_body_index);
                if(body_swap_index <= room_body_index)
                    body->items.insert(body->items.begin() + body_swap_index, std::move(body_item));
                else
                    body->items.insert(body->items.begin() + (body_swap_index - 1), std::move(body_item));
            }
        }
#else
        int room_body_index = body->get_index_by_body_item(room->body_item.get());
        if(room_body_index == -1)
            return;

        //sort_on_update = true;
        int selected_item = body->get_selected_item();
        if(room_body_index == selected_item)
            return;

        for(size_t i = 0; i < body->items.size(); ++i) {
            RoomData *room_i = static_cast<RoomData*>(body->items[i]->userdata);
            if((int)i == room_body_index)
                return;
            if((int)i != selected_item && room_i && room->last_message_timestamp >= room_i->last_message_timestamp) {
                auto body_item_to_insert = body->items[room_body_index];
                body->items.erase(body->items.begin() + room_body_index);
                if(room_body_index >= (int)i)
                    body->items.insert(body->items.begin() + i, std::move(body_item_to_insert));
                else
                    body->items.insert(body->items.begin() + (i - 1), std::move(body_item_to_insert));
                if((int)i < selected_item && room_body_index > selected_item && body->items.size() > 1 && i != body->items.size() - 1) {
                    body->select_first_item();
                    body->set_selected_item(selected_item + 1, false);
                }
                return;
            }
        }
#endif
    }

    void MatrixRoomsPage::remove_body_item_by_room_id(const std::string &room_id) {
        std::lock_guard<std::mutex> lock(mutex);
        pending_remove_body_items.push_back(room_id);
    }

    void MatrixRoomsPage::set_current_chat_page(MatrixChatPage *chat_page) {
        std::lock_guard<std::mutex> lock(mutex);
        current_chat_page = chat_page;
    }

    void MatrixRoomsPage::clear_data() {
        std::lock_guard<std::mutex> lock(mutex);
        room_body_items.clear();
        pending_remove_body_items.clear();
        clear_data_on_update = true;
        if(current_chat_page)
            current_chat_page->should_clear_data = true;
    }

    void MatrixRoomsPage::sort_rooms() {
        sort_on_update = true;
    }

    PluginResult MatrixRoomTagsPage::submit(const std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        (void)title;
        std::lock_guard<std::recursive_mutex> lock(mutex);
        auto body = create_body();
        Body *body_ptr = body.get();
        TagData &tag_data = tag_body_items_by_name[url];
        body->items = tag_data.room_body_items;
        //BodyItem *selected_item = body->get_selected();
        sort_room_body_items(body->items);
        //body_set_selected_item(body.get(), selected_item);
        auto search_bar = create_search_bar("Search...", SEARCH_DELAY_FILTER);
        auto rooms_page = std::make_unique<MatrixRoomsPage>(program, body_ptr, tag_data.tag_item->get_title(), this, search_bar.get());
        rooms_page->matrix_delegate = matrix_delegate;
        result_tabs.push_back(Tab{std::move(body), std::move(rooms_page), std::move(search_bar)});
        return PluginResult::OK;
    }

    // TODO: Also add/remove body items to above body (in submit)
    void MatrixRoomTagsPage::update() {
        {
            std::lock_guard<std::recursive_mutex> lock(mutex);
            int prev_selected_item = body->get_selected_item();
            if(clear_data_on_update) {
                clear_data_on_update = false;
                body->clear_items();
            }

            for(auto &it : remove_room_body_items_by_tags) {
                auto tag_body_it = tag_body_items_by_name.find(it.first);
                if(tag_body_it == tag_body_items_by_name.end())
                    continue;

                for(auto &room_to_remove : it.second) {
                    auto room_body_item_it = std::find(tag_body_it->second.room_body_items.begin(), tag_body_it->second.room_body_items.end(), room_to_remove);
                    if(room_body_item_it != tag_body_it->second.room_body_items.end())
                        tag_body_it->second.room_body_items.erase(room_body_item_it);
                }

                if(tag_body_it->second.room_body_items.empty()) {
                    auto room_body_item_it = std::find(body->items.begin(), body->items.end(), tag_body_it->second.tag_item);
                    if(room_body_item_it != body->items.end()) {
                        body->items.erase(room_body_item_it);
                        filter_on_update = true;
                    }
                    tag_body_items_by_name.erase(tag_body_it);
                }
            }
            remove_room_body_items_by_tags.clear();

            for(auto &it : add_room_body_items_by_tags) {
                TagData *tag_data;
                auto tag_body_it = tag_body_items_by_name.find(it.first);
                if(tag_body_it == tag_body_items_by_name.end()) {
                    std::string tag_name = tag_get_name(it.first);
                    if(!tag_name.empty()) {
                        auto tag_body_item = BodyItem::create(std::move(tag_name));
                        tag_body_item->url = it.first;
                        tag_body_items_by_name.insert(std::make_pair(it.first, TagData{tag_body_item, {}}));
                        // TODO: Sort by tag priority
                        body->items.push_back(tag_body_item);
                        tag_data = &tag_body_items_by_name[it.first];
                        tag_data->tag_item = tag_body_item;
                        filter_on_update = true;
                    }
                } else {
                    tag_data = &tag_body_it->second;
                }

                for(auto &room_body_item : it.second) {
                    bool already_exists = false;
                    for(auto &body_it : tag_data->room_body_items) {
                        if(body_it->userdata == room_body_item->userdata) {
                            already_exists = true;
                            break;
                        }
                    }
                    if(!already_exists)
                        tag_data->room_body_items.push_back(room_body_item);
                }
            }
            add_room_body_items_by_tags.clear();
            body->set_selected_item(prev_selected_item, false);
        }
        matrix_delegate->update(MatrixPageType::ROOM_LIST);
        if(filter_on_update) {
            filter_on_update = false;
            if(search_bar)
                body->filter_search_fuzzy(search_bar->get_text());
        }
    }

    void MatrixRoomTagsPage::add_room_body_item_to_tag(std::shared_ptr<BodyItem> body_item, const std::string &tag) {
        std::lock_guard<std::recursive_mutex> lock(mutex);
        add_room_body_items_by_tags[tag].push_back(body_item);
    }

    void MatrixRoomTagsPage::remove_room_body_item_from_tag(std::shared_ptr<BodyItem> body_item, const std::string &tag) {
        std::lock_guard<std::recursive_mutex> lock(mutex);
        remove_room_body_items_by_tags[tag].push_back(body_item);
    }

    void MatrixRoomTagsPage::move_room_to_top(RoomData *room) {
        std::lock_guard<std::recursive_mutex> lock(mutex);
        if(current_rooms_page)
            current_rooms_page->move_room_to_top(room);
    }

    void MatrixRoomTagsPage::remove_body_item_by_room_id(const std::string &room_id) {
        std::lock_guard<std::recursive_mutex> lock(mutex);
        for(auto it = tag_body_items_by_name.begin(); it != tag_body_items_by_name.end();) {
            remove_body_item_by_url(it->second.room_body_items, room_id);
            if(it->second.room_body_items.empty())
                it = tag_body_items_by_name.erase(it);
            else
                ++it;
        }
        if(current_rooms_page)
            current_rooms_page->remove_body_item_by_room_id(room_id);
    }

    void MatrixRoomTagsPage::set_current_rooms_page(MatrixRoomsPage *rooms_page) {
        std::lock_guard<std::recursive_mutex> lock(mutex);
        current_rooms_page = rooms_page;
    }

    void MatrixRoomTagsPage::clear_data() {
        std::lock_guard<std::recursive_mutex> lock(mutex);
        tag_body_items_by_name.clear();
        add_room_body_items_by_tags.clear();
        remove_room_body_items_by_tags.clear();
        clear_data_on_update = true;
        if(current_rooms_page)
            current_rooms_page->clear_data();
    }

    void MatrixRoomTagsPage::sort_rooms() {
        std::lock_guard<std::recursive_mutex> lock(mutex);
        if(current_rooms_page)
            current_rooms_page->sort_rooms();
    }

    MatrixInvitesPage::MatrixInvitesPage(Program *program, Matrix *matrix, Body *body, SearchBar *search_bar) : Page(program), matrix(matrix), body(body), search_bar(search_bar) {

    }

    PluginResult MatrixInvitesPage::submit(const std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        auto body = create_body();
        body->items.push_back(BodyItem::create("Accept"));
        body->items.push_back(BodyItem::create("Decline"));
        result_tabs.push_back(Tab{std::move(body), std::make_unique<MatrixInviteDetailsPage>(program, matrix, this, url, "Invite to " + title), nullptr});
        return PluginResult::OK;
    }

    PluginResult MatrixInviteDetailsPage::submit(const std::string &title, const std::string&, std::vector<Tab>&) {
        TaskResult task_result = program->run_task_with_loading_screen([this, title]() {
            if(title == "Accept")
                return matrix->join_room(room_id) == PluginResult::OK;
            else if(title == "Decline")
                return matrix->leave_room(room_id) == PluginResult::OK;
            return false;
        });

        if(task_result == TaskResult::TRUE) {
            invites_page->remove_body_item_by_room_id(room_id);
        } else if(task_result == TaskResult::FALSE) {
            std::string action_str;
            if(title == "Accept")
                action_str = "accept";
            else if(title == "Decline")
                action_str = "decline";
            show_notification("QuickMedia", "Failed to " + action_str + " the room invite", Urgency::CRITICAL);
        }

        program->set_go_to_previous_page();
        return PluginResult::OK;
    }

    void MatrixInvitesPage::update() {
        std::lock_guard<std::mutex> lock(mutex);

        int prev_selected_item = body->get_selected_item();
        if(clear_data_on_update) {
            clear_data_on_update = false;
            body->clear_items();
        }

        if(!pending_remove_body_items.empty() || !body_items.empty())
            filter_on_update = true;

        for(const std::string &room_id : pending_remove_body_items) {
            remove_body_item_by_url(body->items, room_id);
        }
        pending_remove_body_items.clear();
        body->set_selected_item(prev_selected_item, false);
        body->clamp_selection();

        // TODO: Insert in reverse order (to show the latest invite at the top?)
        body->insert_items_by_timestamps(std::move(body_items));
        if(body->items.size() != prev_invite_count) {
            prev_invite_count = body->items.size();
            title = "Invites (" + std::to_string(body->items.size()) + ")";
        }

        if(filter_on_update) {
            filter_on_update = false;
            if(search_bar)
                body->filter_search_fuzzy(search_bar->get_text());
        }
    }

    void MatrixInvitesPage::add_body_item(std::shared_ptr<BodyItem> body_item) {
        std::lock_guard<std::mutex> lock(mutex);
        body_items.push_back(std::move(body_item));
    }

    void MatrixInvitesPage::remove_body_item_by_room_id(const std::string &room_id) {
        std::lock_guard<std::mutex> lock(mutex);
        pending_remove_body_items.push_back(room_id);
    }

    void MatrixInvitesPage::clear_data() {
        std::lock_guard<std::mutex> lock(mutex);
        body_items.clear();
        pending_remove_body_items.clear();
        title = "Invites (0)";
        prev_invite_count = 0;
        clear_data_on_update = true;
    }

    MatrixChatPage::MatrixChatPage(Program *program, std::string room_id, MatrixRoomsPage *rooms_page) : Page(program), room_id(std::move(room_id)), rooms_page(rooms_page) {
        if(rooms_page)
            rooms_page->set_current_chat_page(this);
    }

    MatrixChatPage::~MatrixChatPage() {
        if(rooms_page)
            rooms_page->set_current_chat_page(nullptr);
    }

    void MatrixChatPage::update() {
        matrix_delegate->update(MatrixPageType::CHAT);
        if(rooms_page)
            rooms_page->update();
    }

    PluginResult MatrixRoomDirectoryPage::submit(const std::string &title, const std::string&, std::vector<Tab> &result_tabs) {
        std::string server_name = title;

        if(strncmp(server_name.c_str(), "http://", 7) == 0)
            server_name.erase(0, 7);
        else if(strncmp(server_name.c_str(), "https://", 8) == 0)
            server_name.erase(0, 8);

        if(strncmp(server_name.c_str(), "www.", 4) == 0)
            server_name.erase(0, 4);

        result_tabs.push_back(Tab{create_body(), std::make_unique<MatrixServerRoomListPage>(program, matrix, server_name), create_search_bar("Search...", 350)});
        return PluginResult::OK;
    }

    PluginResult MatrixServerRoomListPage::lazy_fetch(BodyItems &result_items) {
        return matrix->get_public_rooms(server_name, search_term, next_batch, result_items, next_batch);
    }

    PluginResult MatrixServerRoomListPage::get_page(const std::string&, int page, BodyItems &result_items) {
        while(current_page < page && !next_batch.empty()) {
            PluginResult plugin_result = lazy_fetch(result_items);
            if(plugin_result != PluginResult::OK) return plugin_result;
            ++current_page;
        }
        return PluginResult::OK;
    }

    SearchResult MatrixServerRoomListPage::search(const std::string &str, BodyItems &result_items) {
        next_batch.clear();
        current_page = 0;
        search_term = str;
        return plugin_result_to_search_result(lazy_fetch(result_items));
    }

    PluginResult MatrixServerRoomListPage::submit(const std::string &title, const std::string &url, std::vector<Tab>&) {
        TaskResult task_result = program->run_task_with_loading_screen([this, url]() {
            return matrix->join_room(url) == PluginResult::OK;
        });

        if(task_result == TaskResult::TRUE) {
            show_notification("QuickMedia", "You joined " + title, Urgency::NORMAL);
            program->set_go_to_previous_page();
        } else if(task_result == TaskResult::FALSE) {
            show_notification("QuickMedia", "Failed to join " + title, Urgency::CRITICAL);
        }

        return PluginResult::OK;
    }

    static std::array<const char*, 7> sync_fail_error_codes = {
        "M_FORBIDDEN",
        "M_UNKNOWN_TOKEN",
        "M_MISSING_TOKEN",
        "M_UNAUTHORIZED",
        "M_USER_DEACTIVATED",
        "M_CAPTCHA_NEEDED",
        "M_MISSING_PARAM"
    };

    static void remove_empty_fields_in_sync_rooms_response(rapidjson::Value &rooms_json) {
        for(const char *member_name : {"join", "invite", "leave"}) {
            auto join_it = rooms_json.FindMember(member_name);
            if(join_it != rooms_json.MemberEnd() && join_it->value.IsObject() && join_it->value.MemberCount() == 0)
                rooms_json.RemoveMember(join_it);
        }
    }

    static void remove_empty_fields_in_sync_account_data_response(rapidjson::Value &account_data_json) {
        for(const char *member_name : {"events"}) {
            auto join_it = account_data_json.FindMember(member_name);
            if(join_it != account_data_json.MemberEnd() && join_it->value.IsObject() && join_it->value.MemberCount() == 0)
                account_data_json.RemoveMember(join_it);
        }
    }

    static void remove_unused_sync_data_fields(rapidjson::Value &json_root) {
        for(auto it = json_root.MemberBegin(); it != json_root.MemberEnd();) {
            if(strcmp(it->name.GetString(), "account_data") == 0 && it->value.IsObject()) {
                remove_empty_fields_in_sync_account_data_response(it->value);
                if(it->value.MemberCount() == 0)
                    it = json_root.RemoveMember(it);
                else
                    ++it;
            } else if(strcmp(it->name.GetString(), "rooms") == 0 && it->value.IsObject()) {
                // TODO: Call this, but dont remove our read marker (needed for notifications on mentions for example). Or maybe we can get it from "account_data"?
                //remove_ephemeral_field_in_sync_rooms_response(rooms_it->value);
                remove_empty_fields_in_sync_rooms_response(it->value);
                if(it->value.MemberCount() == 0)
                    it = json_root.RemoveMember(it);
                else
                    ++it;
            } else {
                it = json_root.EraseMember(it);
            }
        }
    }

    void Matrix::start_sync(MatrixDelegate *delegate, bool &cached) {
        cached = true;
        if(sync_running)
            return;

        assert(!this->delegate);
        assert(!access_token.empty()); // Need to be logged in
        this->delegate = delegate;

        Path matrix_cache_dir = get_cache_dir().join("matrix");
        if(create_directory_recursive(matrix_cache_dir) != 0)
            fprintf(stderr, "Failed to create matrix cache directory\n");
        matrix_cache_dir.join("sync_data.json");

        cached = (get_file_type(matrix_cache_dir) == FileType::REGULAR);

        sync_is_cache = false;
        sync_running = true;

        sync_thread = std::thread([this, matrix_cache_dir]() {
            sync_is_cache = true;
            bool cache_available = false;
            FILE *sync_cache_file = fopen(matrix_cache_dir.data.c_str(), "rb");
            if(sync_cache_file) {
                cache_available = true;
                rapidjson::Document doc;
                char read_buffer[8192];
                rapidjson::FileReadStream is(sync_cache_file, read_buffer, sizeof(read_buffer));
                while(true) {
                    rapidjson::ParseResult parse_result = doc.ParseStream<rapidjson::kParseStopWhenDoneFlag>(is);
                    if(parse_result.IsError())
                        break;
                    if(parse_sync_response(doc, false, false) != PluginResult::OK)
                        fprintf(stderr, "Failed to parse cached sync response\n");
                }
                fclose(sync_cache_file);
            }
            sync_is_cache = false;

            // Filter with account data
            // {"presence":{"limit":0,"types":[""]},"account_data":{"not_types":["im.vector.setting.breadcrumbs","m.push_rules","im.vector.setting.allowed_widgets","io.element.recent_emoji"]},"room":{"state":{"limit":1,"not_types":["m.room.related_groups","m.room.power_levels","m.room.join_rules","m.room.history_visibility"],"lazy_load_members":true},"timeline":{"limit":3,"lazy_load_members":true},"ephemeral":{"limit":0,"types":[""],"lazy_load_members":true},"account_data":{"limit":1,"types":["m.fully_read"],"lazy_load_members":true}}}

#if 0
            bool filter_cached = false;
            Path filter_path = get_storage_dir().join("matrix").join("filter");
            if(get_file_type(filter_path) == FileType::REGULAR)
                filter_cached = true;
            
            // We dont want to POST filter for initial login sync and instead do it after sync.
            // This should improve initial sync by around 600ms
            std::string filter;
            if(filter_cached)
                filter = get_filter_cached();
            else
                filter = FILTER;
#endif
            std::string filter_encoded = url_param_encode(INITIAL_FILTER);

            std::vector<CommandArg> additional_args = {
                { "-H", "Authorization: Bearer " + access_token },
                { "-m", "35" }
            };

            const rapidjson::Value *next_batch_json;
            PluginResult result;
            bool initial_sync = true;
            while(sync_running) {
                char url[1024];
                if(next_batch.empty())
                    snprintf(url, sizeof(url), "%s/_matrix/client/r0/sync?filter=%s&timeout=0", homeserver.c_str(), filter_encoded.c_str());
                else
                    snprintf(url, sizeof(url), "%s/_matrix/client/r0/sync?filter=%s&timeout=30000&since=%s", homeserver.c_str(), filter_encoded.c_str(), next_batch.c_str());

                rapidjson::Document json_root;
                std::string err_msg;
                DownloadResult download_result = download_json(json_root, url, additional_args, true, &err_msg);
                if(download_result != DownloadResult::OK) {
                    fprintf(stderr, "/sync failed\n");
                    goto sync_end;
                }

                if(initial_sync && json_root.IsObject()) {
                    const rapidjson::Value &errcode_json = GetMember(json_root, "errcode");
                    if(errcode_json.IsString()) {
                        for(const char *sync_fail_error_code : sync_fail_error_codes) {
                            if(strcmp(errcode_json.GetString(), sync_fail_error_code) == 0) {
                                sync_fail_reason = sync_fail_error_code;
                                const rapidjson::Value &error_json = GetMember(json_root, "error");
                                if(error_json.IsString())
                                    sync_fail_reason = error_json.GetString();
                                sync_failed = true;
                                sync_running = false;
                                break;
                            }
                        }
                        fprintf(stderr, "/sync failed\n");
                        goto sync_end;
                    }
                }

                if(next_batch.empty())
                    clear_sync_cache_for_new_sync();

                result = parse_sync_response(json_root, false, initial_sync);
                if(result != PluginResult::OK) {
                    fprintf(stderr, "Failed to parse sync response\n");
                    goto sync_end;
                }

                next_batch_json = &GetMember(json_root, "next_batch");
                if(next_batch_json->IsString()) {
                    set_next_batch(next_batch_json->GetString());
                    fprintf(stderr, "Matrix: next batch: %s\n", next_batch.c_str());
                } else {
                    //set_next_batch("Invalid");
                    fprintf(stderr, "Matrix: missing next batch\n");
                    goto sync_end;
                }

                if(initial_sync) {
                    notification_thread = std::thread([this]() {
                        std::vector<CommandArg> additional_args = {
                            { "-H", "Authorization: Bearer " + access_token }
                        };

                        // TODO: Instead of guessing notification limit with 100, accumulate rooms unread_notifications count and use that as the limit
                        // (and take into account that notification response may have notifications after call to sync above).
                        char url[512];
                        snprintf(url, sizeof(url), "%s/_matrix/client/r0/notifications?limit=100&only=highlight", homeserver.c_str());

                        rapidjson::Document json_root;
                        DownloadResult download_result = download_json(json_root, url, std::move(additional_args), true);
                        if(download_result != DownloadResult::OK || !json_root.IsObject()) {
                            fprintf(stderr, "Fetching notifications failed!\n");
                            return;
                        }

                        const rapidjson::Value &notification_json = GetMember(json_root, "notifications");
                        parse_notifications(notification_json);

                        {
                            std::vector<CommandArg> additional_args = {
                                { "-H", "Authorization: Bearer " + access_token },
                                { "-m", "35" }
                            };

                            char url[1024];
                            std::string filter_encoded = url_param_encode(ADDITIONAL_MESSAGES_FILTER);
                            snprintf(url, sizeof(url), "%s/_matrix/client/r0/sync?filter=%s&timeout=0", homeserver.c_str(), filter_encoded.c_str());

                            rapidjson::Document json_root;
                            std::string err_msg;
                            DownloadResult download_result = download_json(json_root, url, additional_args, true, &err_msg);
                            if(download_result != DownloadResult::OK) {
                                fprintf(stderr, "/sync for additional messages failed\n");
                                return;
                            }

                            // TODO: Test?
                            //if(next_batch.empty())
                            //    clear_sync_cache_for_new_sync();

                            additional_messages_queue.pop_wait();
                            parse_sync_response(json_root, true, false);
                        }
                    });

                    filter_encoded = url_param_encode(CONTINUE_FILTER);
                    additional_messages_queue.push(true);
                }

#if 0
                if(!filter_cached) {
                    filter_cached = true;
                    filter_encoded = url_param_encode(get_filter_cached());
                }
#endif

                // TODO: Circulate file
                sync_cache_file = fopen(matrix_cache_dir.data.c_str(), initial_sync ? "wb" : "ab");
                initial_sync = false;
                if(sync_cache_file) {
                    if(json_root.IsObject()) {
                        char buffer[4096];
                        rapidjson::FileWriteStream file_write_stream(sync_cache_file, buffer, sizeof(buffer));
                        rapidjson::Writer<rapidjson::FileWriteStream> writer(file_write_stream);
                        remove_unused_sync_data_fields(json_root);
                        json_root.Accept(writer);
                    }
                    fclose(sync_cache_file);
                }

                sync_end:
                if(sync_running)
                    std::this_thread::sleep_for(std::chrono::milliseconds(500));
            }
        });
    }

    void Matrix::stop_sync() {
        sync_running = false;

        if(sync_thread.joinable()) {
            program_kill_in_thread(sync_thread.get_id());
            sync_thread.join();
        }

        if(sync_additional_messages_thread.joinable()) {
            program_kill_in_thread(sync_additional_messages_thread.get_id());
            additional_messages_queue.close();
            sync_additional_messages_thread.join();
            additional_messages_queue.restart();
        }
        
        if(notification_thread.joinable()) {
            program_kill_in_thread(notification_thread.get_id());
            notification_thread.join();
        }

        delegate = nullptr;
        sync_failed = false;
        sync_fail_reason.clear();
    }

    bool Matrix::is_initial_sync_finished() const {
        return !next_batch.empty();
    }

    bool Matrix::did_initial_sync_fail(std::string &err_msg) {
        if(sync_failed) {
            err_msg = sync_fail_reason;
            return true;
        } else {
            return false;
        }
    }

    void Matrix::get_room_sync_data(RoomData *room, SyncData &sync_data) {
        room->acquire_room_lock();
        auto &room_messages = room->get_messages_thread_unsafe();
        if(room->messages_read_index <= room_messages.size()) {
            sync_data.messages.insert(sync_data.messages.end(), room_messages.begin() + room->messages_read_index, room_messages.end());
            room->messages_read_index = room_messages.size();
        } else {
            // TODO: BUG
            fprintf(stderr, "Unexpected behavior!!!! get_room_sync_data said read index is %zu but we only have %zu messages\n", room->messages_read_index, room_messages.size());
            room->messages_read_index = room_messages.size();
        }
        if(room->pinned_events_updated) {
            sync_data.pinned_events = room->get_pinned_events_unsafe();
            room->pinned_events_updated = false;
        }
        room->release_room_lock();
    }

    void Matrix::get_all_synced_room_messages(RoomData *room, Messages &messages) {
        room->acquire_room_lock();
        messages = room->get_messages_thread_unsafe();
        room->messages_read_index = messages.size();
        room->release_room_lock();
    }

    void Matrix::get_all_pinned_events(RoomData *room, std::vector<std::string> &events) {
        room->acquire_room_lock();
        events = room->get_pinned_events_unsafe();
        room->pinned_events_updated = false;
        room->release_room_lock();
    }

    PluginResult Matrix::get_previous_room_messages(RoomData *room, Messages &messages, bool latest_messages) {
        size_t num_new_messages = 0;
        PluginResult result = get_previous_room_messages(room, latest_messages, num_new_messages);
        if(result != PluginResult::OK)
            return result;

        room->acquire_room_lock();
        messages.insert(messages.end(), room->get_messages_thread_unsafe().begin(), room->get_messages_thread_unsafe().begin() + num_new_messages);
        room->messages_read_index += num_new_messages;
        //assert(room->messages_read_index <= num_messages_after);
        // TODO: BUG
        if(room->messages_read_index >= room->get_messages_thread_unsafe().size())
            room->messages_read_index = room->get_messages_thread_unsafe().size();
        room->release_room_lock();
        return PluginResult::OK;
    }

    PluginResult Matrix::parse_sync_response(const rapidjson::Document &root, bool is_additional_messages_sync, bool initial_sync) {
        if(!root.IsObject())
            return PluginResult::ERR;

        //const rapidjson::Value &account_data_json = GetMember(root, "account_data");
        //std::optional<std::set<std::string>> dm_rooms;
        //parse_sync_account_data(account_data_json, dm_rooms);
        // TODO: Include "Direct messages" as a tag using |dm_rooms| above

        const rapidjson::Value &rooms_json = GetMember(root, "rooms");
        parse_sync_room_data(rooms_json, is_additional_messages_sync, initial_sync);

        return PluginResult::OK;
    }

    PluginResult Matrix::parse_notifications(const rapidjson::Value &notifications_json) {
        if(!notifications_json.IsArray())
            return PluginResult::ERR;

        for(const rapidjson::Value &notification_json : notifications_json.GetArray()) {
            if(!notification_json.IsObject())
                continue;
            
            const rapidjson::Value &read_json = GetMember(notification_json, "read");
            if(!read_json.IsBool() || read_json.GetBool())
                continue;

            const rapidjson::Value &room_id_json = GetMember(notification_json, "room_id");
            if(!room_id_json.IsString())
                continue;

            const rapidjson::Value &event_json = GetMember(notification_json, "event");
            if(!event_json.IsObject())
                continue;

            const rapidjson::Value &event_id_json = GetMember(event_json, "event_id");
            if(!event_id_json.IsString())
                continue;

            const rapidjson::Value &sender_json = GetMember(event_json, "sender");
            if(!sender_json.IsString())
                continue;

            const rapidjson::Value &content_json = GetMember(event_json, "content");
            if(!content_json.IsObject())
                continue;

            const rapidjson::Value &body_json = GetMember(content_json, "body");
            if(!body_json.IsString())
                continue;

            std::string room_id(room_id_json.GetString(), room_id_json.GetStringLength());
            RoomData *room = get_room_by_id(room_id);
            if(!room) {
                fprintf(stderr, "Warning: got notification in unknown room %s\n", room_id.c_str());
                continue;
            }

            std::string event_id(event_id_json.GetString(), event_id_json.GetStringLength());
            std::string sender(sender_json.GetString(), sender_json.GetStringLength());
            std::string body(body_json.GetString(), body_json.GetStringLength());
            delegate->add_unread_notification(room, std::move(event_id), std::move(sender), std::move(body));
        }
        return PluginResult::OK;
    }

    PluginResult Matrix::parse_sync_account_data(const rapidjson::Value &account_data_json, std::optional<std::set<std::string>> &dm_rooms) {
        if(!account_data_json.IsObject())
            return PluginResult::OK;

        const rapidjson::Value &events_json = GetMember(account_data_json, "events");
        if(!events_json.IsArray())
            return PluginResult::OK;

        bool has_direct_rooms = false;
        std::set<std::string> dm_rooms_tmp;
        for(const rapidjson::Value &event_item_json : events_json.GetArray()) {
            if(!event_item_json.IsObject())
                continue;

            const rapidjson::Value &type_json = GetMember(event_item_json, "type");
            if(!type_json.IsString() || strcmp(type_json.GetString(), "m.direct") != 0)
                continue;

            const rapidjson::Value &content_json = GetMember(event_item_json, "content");
            if(!content_json.IsObject())
                continue;
            
            has_direct_rooms = true;
            for(auto const &it : content_json.GetObject()) {
                if(!it.value.IsArray())
                    continue;

                for(const rapidjson::Value &room_id_json : it.value.GetArray()) {
                    if(!room_id_json.IsString())
                        continue;
                    
                    dm_rooms_tmp.insert(std::string(room_id_json.GetString(), room_id_json.GetStringLength()));
                }
            }
        }

        if(has_direct_rooms)
            dm_rooms = std::move(dm_rooms_tmp);

        return PluginResult::OK;
    }

    PluginResult Matrix::parse_sync_room_data(const rapidjson::Value &rooms_json, bool is_additional_messages_sync, bool initial_sync) {
        if(!rooms_json.IsObject())
            return PluginResult::OK;

        std::unordered_set<RoomData*> existing_rooms;

        const rapidjson::Value &join_json = GetMember(rooms_json, "join");
        if(join_json.IsObject()) {
            for(auto const &it : join_json.GetObject()) {
                if(!it.value.IsObject())
                    continue;

                const rapidjson::Value &room_id = it.name;
                if(!room_id.IsString())
                    continue;

                std::string room_id_str = room_id.GetString();

                bool is_new_room = false;
                RoomData *room = get_room_by_id(room_id_str);
                if(!room) {
                    auto new_room = std::make_unique<RoomData>();
                    new_room->id = room_id_str;
                    room = new_room.get();
                    add_room(std::move(new_room));
                    is_new_room = true;
                }
                if(initial_sync)
                    existing_rooms.insert(room);

                const rapidjson::Value &state_json = GetMember(it.value, "state");
                if(state_json.IsObject()) {
                    const rapidjson::Value &events_json = GetMember(state_json, "events");
                    events_add_user_info(events_json, room);
                    events_set_room_name(events_json, room);
                    if(!is_additional_messages_sync)
                        events_add_pinned_events(events_json, room);
                }

                const rapidjson::Value &account_data_json = GetMember(it.value, "account_data");

                const rapidjson::Value &timeline_json = GetMember(it.value, "timeline");
                if(timeline_json.IsObject()) {
                    if(is_additional_messages_sync) {
                        // This may be non-existent if this is the first event in the room
                        const rapidjson::Value &prev_batch_json = GetMember(timeline_json, "prev_batch");
                        if(prev_batch_json.IsString())
                            room->set_prev_batch(prev_batch_json.GetString());
                    }

                    bool has_unread_notifications = false;
                    const rapidjson::Value &unread_notification_json = GetMember(it.value, "unread_notifications");
                    if(unread_notification_json.IsObject() && !is_additional_messages_sync) {
                        const rapidjson::Value &highlight_count_json = GetMember(unread_notification_json, "highlight_count");
                        if(highlight_count_json.IsInt64() && (highlight_count_json.GetInt64() > 0 || initial_sync)) {
                            room->unread_notification_count = highlight_count_json.GetInt64();
                            if(highlight_count_json.GetInt64() > 0)
                                has_unread_notifications = true;
                        }
                    }

                    const rapidjson::Value &events_json = GetMember(timeline_json, "events");
                    events_add_user_info(events_json, room);
                    events_set_room_name(events_json, room);
                    set_room_name_to_users_if_empty(room, my_user_id);

                    if(account_data_json.IsObject()) {
                        const rapidjson::Value &events_json = GetMember(account_data_json, "events");
                        auto me = get_me(room);
                        events_set_user_read_marker(events_json, room, me);
                    }

                    if(is_new_room)
                        delegate->join_room(room);

                    events_add_messages(events_json, room, MessageDirection::AFTER, has_unread_notifications);
                    if(!is_additional_messages_sync)
                        events_add_pinned_events(events_json, room);
                } else {
                    set_room_name_to_users_if_empty(room, my_user_id);
                    if(account_data_json.IsObject()) {
                        const rapidjson::Value &events_json = GetMember(account_data_json, "events");
                        auto me = get_me(room);
                        events_set_user_read_marker(events_json, room, me);
                    }

                    if(is_new_room)
                        delegate->join_room(room);
                }

                if(remove_invite(room_id_str)) {
                    // TODO: Show leave type and reason and who caused the invite to be removed
                    delegate->remove_invite(room_id_str);
                }

                if(account_data_json.IsObject()) {
                    const rapidjson::Value &events_json = GetMember(account_data_json, "events");
                    events_add_room_to_tags(events_json, room);
                }
                
                if(is_new_room) {
                    room->acquire_room_lock();
                    std::set<std::string> &room_tags = room->get_tags_unsafe();
                    if(room_tags.empty()) {
                        room_tags.insert(OTHERS_ROOM_TAG);
                        delegate->room_add_tag(room, OTHERS_ROOM_TAG);
                    }
                    room->release_room_lock();
                }
            }
        }

        if(!is_additional_messages_sync) {
            const rapidjson::Value &leave_json = GetMember(rooms_json, "leave");
            remove_rooms(leave_json);

            const rapidjson::Value &invite_json = GetMember(rooms_json, "invite");
            add_invites(invite_json);
        }

        if(initial_sync) {
            std::lock_guard<std::recursive_mutex> lock(room_data_mutex);
            for(auto &room : rooms) {
                if(existing_rooms.find(room.get()) == existing_rooms.end()) {
                    delegate->leave_room(room.get(), LeaveType::LEAVE, "");
                    remove_room(room->id);
                }
            }
        }

        return PluginResult::OK;
    }

    void Matrix::events_add_user_info(const rapidjson::Value &events_json, RoomData *room_data) {
        if(!events_json.IsArray())
            return;

        for(const rapidjson::Value &event_item_json : events_json.GetArray()) {
            if(!event_item_json.IsObject())
                continue;

            const rapidjson::Value &type_json = GetMember(event_item_json, "type");
            if(!type_json.IsString() || strcmp(type_json.GetString(), "m.room.member") != 0)
                continue;

            const rapidjson::Value *sender_json = &GetMember(event_item_json, "sender");
            if(!sender_json->IsString())
                continue;

            const rapidjson::Value *state_key_json = &GetMember(event_item_json, "state_key");
            if(state_key_json->IsString() && state_key_json->GetStringLength() != 0)
                sender_json = state_key_json;
            
            const rapidjson::Value &content_json = GetMember(event_item_json, "content");
            if(!content_json.IsObject())
                continue;

            parse_user_info(content_json, sender_json->GetString(), room_data);
        }
    }

    static std::string thumbnail_url_extract_media_id(const std::string &media_url) {
        size_t start = 0;
        size_t end = media_url.size();
        if(strncmp(media_url.c_str(), "mxc://", 6) == 0)
            start = 6;
        if(media_url.size() >= start + 5 && strncmp(media_url.c_str() + media_url.size() - 5, "#auto", 5) == 0)
            end = media_url.size() - 5;
        return media_url.substr(start, end - start);
    }

    static std::string get_thumbnail_url(const std::string &homeserver, const std::string &mxc_id) {
        std::string size = std::to_string(int(32 * get_ui_scale()));
        return homeserver + "/_matrix/media/r0/thumbnail/" + mxc_id + "?width=" + size + "&height=" + size + "&method=crop";
    }

    std::shared_ptr<UserInfo> Matrix::parse_user_info(const rapidjson::Value &json, const std::string &user_id, RoomData *room_data) {
        assert(json.IsObject());
        std::string avatar_url_str;
        const rapidjson::Value &avatar_url_json = GetMember(json, "avatar_url");
        if(avatar_url_json.IsString())
            avatar_url_str = std::string(avatar_url_json.GetString(), avatar_url_json.GetStringLength());

        const rapidjson::Value &display_name_json = GetMember(json, "displayname");

        std::string display_name = display_name_json.IsString() ? display_name_json.GetString() : user_id;
        std::string avatar_url = thumbnail_url_extract_media_id(avatar_url_str);
        if(!avatar_url.empty())
            avatar_url = get_thumbnail_url(homeserver, avatar_url); // TODO: Remove the constant strings around to reduce memory usage (6.3mb)
        //auto user_info = std::make_shared<UserInfo>(room_data, user_id, std::move(display_name), std::move(avatar_url));
        // Overwrites user data
        //room_data->add_user(user_info);
        auto user_info = get_user_by_id(room_data, user_id);
        room_data->set_user_display_name(user_info, std::move(display_name));
        room_data->set_user_avatar_url(user_info, std::move(avatar_url));
        return user_info;
    }

    void Matrix::events_set_user_read_marker(const rapidjson::Value &events_json, RoomData *room_data, std::shared_ptr<UserInfo> &me) {
        assert(me); // TODO: Remove read marker from user and set it for the room instead. We need that in the matrix pages also
        if(!events_json.IsArray() || !me)
            return;

        for(const rapidjson::Value &event_json : events_json.GetArray()) {
            if(!event_json.IsObject())
                continue;

            const rapidjson::Value &type_json = GetMember(event_json, "type");
            if(!type_json.IsString())
                continue;

            if(strcmp(type_json.GetString(), "m.fully_read") == 0) {
                const rapidjson::Value &content_json = GetMember(event_json, "content");
                if(!content_json.IsObject())
                    continue;

                const rapidjson::Value &event_id_json = GetMember(content_json, "event_id");
                if(!event_id_json.IsString())
                    continue;

                room_data->set_user_read_marker(me, std::string(event_id_json.GetString(), event_id_json.GetStringLength()));
            } else if(strcmp(type_json.GetString(), "qm.last_read_message_timestamp") == 0) {
                const rapidjson::Value &content_json = GetMember(event_json, "content");
                if(!content_json.IsObject())
                    continue;

                const rapidjson::Value &timestamp_json = GetMember(content_json, "timestamp");
                if(!timestamp_json.IsInt64())
                    continue;

                room_data->read_marker_event_timestamp = timestamp_json.GetInt64();
            }
        }
    }

    static bool message_content_extract_thumbnail_size(const rapidjson::Value &content_json, sf::Vector2i &thumbnail_size) {
        const rapidjson::Value &info_json = GetMember(content_json, "info");
        if(!info_json.IsObject())
            return false;

        bool found_resolution = false;
        const rapidjson::Value &w_json = GetMember(info_json, "w");
        const rapidjson::Value &h_json = GetMember(info_json, "h");
        if(w_json.IsInt() && h_json.IsInt()) {
            thumbnail_size.x = w_json.GetInt();
            thumbnail_size.y = h_json.GetInt();
            found_resolution = true;
        }

        const rapidjson::Value &thumbnail_info_json = GetMember(info_json, "thumbnail_info");
        if(thumbnail_info_json.IsObject()) {
            const rapidjson::Value &w_json = GetMember(thumbnail_info_json, "w");
            const rapidjson::Value &h_json = GetMember(thumbnail_info_json, "h");
            if(w_json.IsInt() && h_json.IsInt()) {
                thumbnail_size.x = w_json.GetInt();
                thumbnail_size.y = h_json.GetInt();
                found_resolution = true;
            }
        }

        return found_resolution;
    }

    static std::string message_content_extract_thumbnail_url(const rapidjson::Value &content_json, const std::string &homeserver) {
        const rapidjson::Value &info_json = GetMember(content_json, "info");
        if(info_json.IsObject()) {
            const rapidjson::Value &thumbnail_url_json = GetMember(info_json, "thumbnail_url");
            if(thumbnail_url_json.IsString()) {
                std::string thumbnail_str = thumbnail_url_json.GetString();
                if(strncmp(thumbnail_str.c_str(), "mxc://", 6) == 0) {
                    thumbnail_str.erase(thumbnail_str.begin(), thumbnail_str.begin() + 6);
                    return homeserver + "/_matrix/media/r0/download/" + std::move(thumbnail_str);
                }
            }
        }

        return "";
    }

    // TODO: Is this really the proper way to check for username mentions?
    static bool is_username_seperating_character(char c) {
        switch(c) {
            case ' ':
            case '\n':
            case '\t':
            case '\v':
            case '.':
            case ',':
            case '@':
            case ':':
            case '?':
            case '!':
            case '<':
            case '>':
            case '\0':
                return true;
            default:
                return false;
        }
        return false;
    }

    static size_t string_find_case_insensitive(const char *haystack, size_t index, size_t length, const std::string &needle) {
        const char *haystack_end = haystack + length;
        auto it = std::search(haystack + index, haystack_end, needle.begin(), needle.end(),
            [](char c1, char c2) {
                return std::toupper(c1) == std::toupper(c2);
            });
        if(it != haystack_end)
            return it - haystack;
        else
            return std::string::npos;
    }

    // TODO: Do not show notification if mention is a reply to somebody else that replies to me? also dont show notification everytime a mention is edited
    bool message_contains_user_mention(const std::string &msg, const std::string &username) {
        if(msg.empty() || username.empty())
            return false;

        size_t index = 0;
        while(index < msg.size()) {
            size_t found_index = string_find_case_insensitive(&msg[0], index, msg.size(), username);
            if(found_index == std::string::npos)
                break;

            char prev_char = ' ';
            if(found_index > 0)
                prev_char = msg[found_index - 1];

            char next_char = '\0';
            if(found_index + username.size() < msg.size() - 1)
                next_char = msg[found_index + username.size()];

            if(is_username_seperating_character(prev_char) && is_username_seperating_character(next_char))
                return true;

            index = found_index + username.size();
        }

        return false;
    }

    bool message_is_timeline(Message *message) {
        return message->type >= MessageType::TEXT && message->type <= MessageType::FILE;
    }

    size_t Matrix::events_add_messages(const rapidjson::Value &events_json, RoomData *room_data, MessageDirection message_dir, bool has_unread_notifications) {
        if(!events_json.IsArray())
            return 0;

        // TODO: Preallocate
        std::vector<std::shared_ptr<Message>> new_messages;
        auto me = get_me(room_data);
        std::string my_display_name = room_data->get_user_display_name(me);

        for(const rapidjson::Value &event_item_json : events_json.GetArray()) {
            std::shared_ptr<Message> new_message = parse_message_event(event_item_json, room_data);
            if(new_message) {
                new_message->cache = sync_is_cache;
                new_messages.push_back(std::move(new_message));
            }
        }

        if(new_messages.empty())
            return 0;

        size_t num_new_messages = 0;
        if(message_dir == MessageDirection::BEFORE) {
            num_new_messages = room_data->prepend_messages_reverse(new_messages);
        } else if(message_dir == MessageDirection::AFTER) {
            num_new_messages = room_data->append_messages(new_messages);
        }

        if(has_unread_notifications) {
            time_t read_marker_message_timestamp = 0;
            if(me) {
                auto read_marker_message = room_data->get_message_by_id(room_data->get_user_read_marker(me));
                if(read_marker_message)
                    read_marker_message_timestamp = read_marker_message->timestamp;
            }

            for(auto &message : new_messages) {
                // TODO: Is @room ok? shouldn't we also check if the user has permission to do @room? (only when notifications are limited to @mentions)
                // TODO: Is comparing against read marker timestamp ok enough?
                if(me && message->timestamp > read_marker_message_timestamp)
                    message->notification_mentions_me = message_contains_user_mention(message->body, my_display_name) || message_contains_user_mention(message->body, me->user_id) || message_contains_user_mention(message->body, "@room");
            }
        }

        if(delegate)
            delegate->room_add_new_messages(room_data, new_messages, next_batch.empty(), sync_is_cache, message_dir);

        return num_new_messages;
    }

    std::shared_ptr<Message> Matrix::parse_message_event(const rapidjson::Value &event_item_json, RoomData *room_data) {
        if(!event_item_json.IsObject())
            return nullptr;

        const rapidjson::Value *sender_json = &GetMember(event_item_json, "sender");
        const rapidjson::Value *sender_json_orig = sender_json;
        if(!sender_json->IsString())
            return nullptr;

        const rapidjson::Value &type_json = GetMember(event_item_json, "type");
        if(!type_json.IsString())
            return nullptr;

        bool sent_by_somebody_else = false;
        const rapidjson::Value *state_key_json = &GetMember(event_item_json, "state_key");
        if(state_key_json->IsString() && state_key_json->GetStringLength() != 0) {
            if(strcmp(type_json.GetString(), "m.room.member") != 0) {
                fprintf(stderr, "Matrix: received state key %s but event type is %s, expected m.room.member\n", type_json.GetString(), state_key_json->GetString());
                return nullptr;
            }
            if(strcmp(sender_json->GetString(), state_key_json->GetString()) != 0)
                sent_by_somebody_else = true;
            sender_json = state_key_json;
        }

        std::string sender_json_str = sender_json->GetString();

        const rapidjson::Value &event_id_json = GetMember(event_item_json, "event_id");
        if(!event_id_json.IsString())
            return nullptr;

        std::string event_id_str = event_id_json.GetString();
        
        const rapidjson::Value *content_json = &GetMember(event_item_json, "content");
        if(!content_json->IsObject())
            return nullptr;

        auto user = get_user_by_id(room_data, sender_json_str);
        if(!user) {
            // Note: this is important because otherwise replying and such is broken
            fprintf(stderr, "Warning: skipping unknown user: %s\n", sender_json_str.c_str());
            return nullptr;
        }

        auto user_sender = user;
        if(sent_by_somebody_else)
            user_sender = get_user_by_id(room_data, sender_json_orig->GetString());

        time_t timestamp = 0;
        const rapidjson::Value &origin_server_ts = GetMember(event_item_json, "origin_server_ts");
        if(origin_server_ts.IsInt64())
            timestamp = origin_server_ts.GetInt64();

        std::string transaction_id;
        const rapidjson::Value &unsigned_json = GetMember(event_item_json, "unsigned");
        if(unsigned_json.IsObject()) {
            const rapidjson::Value &transaction_id_json = GetMember(unsigned_json, "transaction_id");
            if(transaction_id_json.IsString() && my_events_transaction_ids.find(transaction_id_json.GetString()) != my_events_transaction_ids.end())
                transaction_id = std::string(transaction_id_json.GetString(), transaction_id_json.GetStringLength());
        }

        RelatedEventType related_event_type = RelatedEventType::NONE;
        std::string related_event_id;
        const rapidjson::Value &relates_to_json = GetMember(*content_json, "m.relates_to");
        if(relates_to_json.IsObject()) {
            const rapidjson::Value &relates_to_event_id_json = GetMember(relates_to_json, "event_id");
            const rapidjson::Value &rel_type_json = GetMember(relates_to_json, "rel_type");
            const rapidjson::Value &in_reply_to_json = GetMember(relates_to_json, "m.in_reply_to");
            const rapidjson::Value &key_json = GetMember(relates_to_json, "key");
            if(relates_to_event_id_json.IsString() && rel_type_json.IsString() && strcmp(rel_type_json.GetString(), "m.replace") == 0) {
                related_event_id = relates_to_event_id_json.GetString();
                related_event_type = RelatedEventType::EDIT;
            } else if(in_reply_to_json.IsObject()) {
                const rapidjson::Value &in_reply_to_event_id = GetMember(in_reply_to_json, "event_id");
                if(in_reply_to_event_id.IsString()) {
                    related_event_id = in_reply_to_event_id.GetString();
                    related_event_type = RelatedEventType::REPLY;
                }
            } else if(relates_to_event_id_json.IsString() && rel_type_json.IsString() && strcmp(rel_type_json.GetString(), "m.annotation") == 0 && key_json.IsString()) {
                if(strcmp(type_json.GetString(), "m.reaction") == 0) {
                    auto message = std::make_shared<Message>();
                    message->type = MessageType::REACTION;
                    message->user = user;
                    message->event_id = event_id_str;
                    message->body = key_json.GetString();
                    message->related_event_id = relates_to_event_id_json.GetString();
                    message->related_event_type = RelatedEventType::REACTION;
                    message->timestamp = timestamp;
                    message->transaction_id = std::move(transaction_id);
                    return message;
                }
            }
        }

        const rapidjson::Value &new_content_json = GetMember(*content_json, "m.new_content");
        if(new_content_json.IsObject())
            content_json = &new_content_json;

        const rapidjson::Value &content_type = GetMember(*content_json, "msgtype");
        if(strcmp(type_json.GetString(), "m.room.redaction") == 0) {
            auto message = std::make_shared<Message>();
            message->type = MessageType::REDACTION;
            message->user = user;
            message->event_id = event_id_str;
            message->body = "Message deleted";
            message->timestamp = timestamp;
            message->related_event_type = RelatedEventType::REDACTION;
            message->transaction_id = std::move(transaction_id);

            const rapidjson::Value &reason_json = GetMember(*content_json, "reason");
            if(reason_json.IsString()) {
                message->body += ", reason: "; 
                message->body += reason_json.GetString();
            }

            const rapidjson::Value &redacts_json = GetMember(event_item_json, "redacts");
            if(redacts_json.IsString())
                message->related_event_id = redacts_json.GetString();

            return message;
        }

        if(strcmp(type_json.GetString(), "m.room.message") == 0 || strcmp(type_json.GetString(), "m.sticker") == 0) {
        } else if(strcmp(type_json.GetString(), "m.reaction") == 0) {
            // An old reaction that has been removed. New reactions are removed with m.redact
            return nullptr;
        } else if(strcmp(type_json.GetString(), "m.room.member") == 0) {
            std::string user_display_name = room_data->get_user_display_name(user);
            std::string sender_display_name = room_data->get_user_display_name(user_sender);
            std::string body;
            std::string reason_str;
            const rapidjson::Value &reason_json = GetMember(*content_json, "reason");
            if(reason_json.IsString())
                reason_str = std::string(reason_json.GetString(), reason_json.GetStringLength());
            const rapidjson::Value &membership_json = GetMember(*content_json, "membership");
            if(strcmp(membership_json.GetString(), "join") == 0) {
                if(unsigned_json.IsObject()) {
                    const rapidjson::Value &prev_sender = GetMember(unsigned_json, "prev_sender");
                    const rapidjson::Value &prev_content_json = GetMember(unsigned_json, "prev_content");
                    if(prev_content_json.IsObject() && (!prev_sender.IsString() || strcmp(prev_sender.GetString(), user->user_id.c_str()) == 0)) {
                        const rapidjson::Value &prev_displayname_json = GetMember(prev_content_json, "displayname");
                        const rapidjson::Value &prev_avatar_url_json = GetMember(prev_content_json, "avatar_url");
                        const rapidjson::Value &new_displayname_json = GetMember(*content_json, "displayname");
                        const rapidjson::Value &new_avatar_url_json = GetMember(*content_json, "avatar_url");
                        const rapidjson::Value &prev_membership_json = GetMember(prev_content_json, "membership");
                        if(prev_membership_json.IsString() && strcmp(prev_membership_json.GetString(), "leave") == 0) {
                            body = user_display_name + " joined the room";
                        } else if(new_displayname_json.IsString() && new_displayname_json.GetStringLength() > 0 && (!prev_displayname_json.IsString() || strcmp(new_displayname_json.GetString(), prev_displayname_json.GetString()) != 0)) {
                            std::string new_displayname_str = std::string(new_displayname_json.GetString());
                            std::string prev_displayname_str;
                            if(prev_displayname_json.IsString())
                                prev_displayname_str = std::string(prev_displayname_json.GetString(), prev_displayname_json.GetStringLength());
                            else
                                prev_displayname_str = sender_json_str;
                            body = prev_displayname_str + " changed their display name to " + new_displayname_str;
                            room_data->set_user_display_name(user, std::move(new_displayname_str));
                        } else if((!new_displayname_json.IsString() || new_displayname_json.GetStringLength() == 0) && prev_displayname_json.IsString()) {
                            body = user_display_name + " removed their display name";
                            room_data->set_user_display_name(user, "");
                        } else if(new_avatar_url_json.IsString() && new_avatar_url_json.GetStringLength() > 0 && (!prev_avatar_url_json.IsString() || strcmp(new_avatar_url_json.GetString(), prev_avatar_url_json.GetString()) != 0)) {
                            body = user_display_name + " changed their profile picture";
                            std::string new_avatar_url_str = thumbnail_url_extract_media_id(new_avatar_url_json.GetString());
                            if(!new_avatar_url_str.empty())
                                new_avatar_url_str = get_thumbnail_url(homeserver, new_avatar_url_str); // TODO: Remove the constant strings around to reduce memory usage (6.3mb)
                            room_data->set_user_avatar_url(user, std::move(new_avatar_url_str));
                        } else if((!new_avatar_url_json.IsString() || new_avatar_url_json.GetStringLength() == 0) && prev_avatar_url_json.IsString()) {
                            body = user_display_name + " removed their profile picture";
                            room_data->set_user_avatar_url(user, "");
                        } else {
                            body = user_display_name + " joined the room";
                        }
                    } else {
                        body = user_display_name + " joined the room";
                    }
                } else {
                    body = user_display_name + " joined the room";
                }
            } else if(strcmp(membership_json.GetString(), "leave") == 0) {
                if(sent_by_somebody_else) {
                    bool known_action = false;
                    if(unsigned_json.IsObject()) {
                        const rapidjson::Value &prev_content_json = GetMember(unsigned_json, "prev_content");
                        if(prev_content_json.IsObject()) {
                            const rapidjson::Value &prev_membership_json = GetMember(prev_content_json, "membership");
                            if(prev_membership_json.IsString() && strcmp(prev_membership_json.GetString(), "ban") == 0) {
                                body = user_display_name + " was unbanned from the room by " + sender_display_name;
                                known_action = true;
                            } else if(prev_membership_json.IsString() && strcmp(prev_membership_json.GetString(), "invite") == 0) {
                                body = sender_display_name + " withdrew " + user_display_name + "'s invitation";
                                known_action = true;
                            }
                        }
                    }
                    if(!known_action)
                        body = user_display_name + " was kicked from the room by " + sender_display_name;
                } else {
                    bool known_action = false;
                    if(unsigned_json.IsObject()) {
                        const rapidjson::Value &prev_content_json = GetMember(unsigned_json, "prev_content");
                        if(prev_content_json.IsObject()) {
                            const rapidjson::Value &prev_membership_json = GetMember(prev_content_json, "membership");
                            if(prev_membership_json.IsString() && strcmp(prev_membership_json.GetString(), "invite") == 0) {
                                body = user_display_name + " rejected the invitation";
                                known_action = true;
                            }
                        }
                    }
                    if(!known_action)
                        body = user_display_name + " left the room";
                }
                if(!reason_str.empty())
                    body += ", reason: " + reason_str;
            } else if(strcmp(membership_json.GetString(), "invite") == 0) {
                body = user_display_name + " was invited to the room by " + sender_display_name;
            } else if(strcmp(membership_json.GetString(), "ban") == 0) {
                body = user_display_name + " was banned from the room by " + sender_display_name;
                if(!reason_str.empty())
                    body += ", reason: " + reason_str;
            } else {
                body = "unimplemented membership: " + std::string(membership_json.GetString());
            }
            auto message = std::make_shared<Message>();
            message->type = MessageType::MEMBERSHIP;
            message->user = user;
            message->event_id = event_id_str;
            message->body = std::move(body);
            message->related_event_id = std::move(related_event_id);
            message->related_event_type = related_event_type;
            message->timestamp = timestamp;
            message->transaction_id = std::move(transaction_id);
            return message;
        } else {
            auto message = std::make_shared<Message>();
            message->type = MessageType::UNIMPLEMENTED;
            message->user = user;
            message->event_id = event_id_str;
            message->body = "unimplemented event type: " + std::string(type_json.GetString());
            message->related_event_id = std::move(related_event_id);
            message->related_event_type = related_event_type;
            message->timestamp = timestamp;
            message->transaction_id = std::move(transaction_id);
            return message;
        }

        const rapidjson::Value &body_json = GetMember(*content_json, "body");
        if(!body_json.IsString())
            return nullptr;

        auto message = std::make_shared<Message>();
        std::string prefix;

        // TODO: Also show joins, leave, invites, bans, kicks, mutes, etc

        if((content_type.IsString() && strcmp(content_type.GetString(), "m.image") == 0) || strcmp(type_json.GetString(), "m.sticker") == 0) {
            const rapidjson::Value &url_json = GetMember(*content_json, "url");
            if(!url_json.IsString() || strncmp(url_json.GetString(), "mxc://", 6) != 0)
                return nullptr;

            message->url = homeserver + "/_matrix/media/r0/download/" + (url_json.GetString() + 6);
            message->thumbnail_url = message_content_extract_thumbnail_url(*content_json, homeserver);
            message_content_extract_thumbnail_size(*content_json, message->thumbnail_size);
            message->type = MessageType::IMAGE;
        } else if(!content_type.IsString() || strcmp(content_type.GetString(), "m.text") == 0) {
            message->type = MessageType::TEXT;
        } else if(strcmp(content_type.GetString(), "m.video") == 0) {
            const rapidjson::Value &url_json = GetMember(*content_json, "url");
            if(!url_json.IsString() || strncmp(url_json.GetString(), "mxc://", 6) != 0)
                return nullptr;

            message->url = homeserver + "/_matrix/media/r0/download/" + (url_json.GetString() + 6);
            message->thumbnail_url = message_content_extract_thumbnail_url(*content_json, homeserver);
            message_content_extract_thumbnail_size(*content_json, message->thumbnail_size);
            message->type = MessageType::VIDEO;
            if(message->thumbnail_url.empty())
                prefix = "🎥 Play ";
        } else if(strcmp(content_type.GetString(), "m.audio") == 0) {
            const rapidjson::Value &url_json = GetMember(*content_json, "url");
            if(!url_json.IsString() || strncmp(url_json.GetString(), "mxc://", 6) != 0)
                return nullptr;

            message->url = homeserver + "/_matrix/media/r0/download/" + (url_json.GetString() + 6);
            message->type = MessageType::AUDIO;
            prefix = "🎵 Play ";
        } else if(strcmp(content_type.GetString(), "m.file") == 0) {
            const rapidjson::Value &url_json = GetMember(*content_json, "url");
            if(!url_json.IsString() || strncmp(url_json.GetString(), "mxc://", 6) != 0)
                return nullptr;

            message->url = homeserver + "/_matrix/media/r0/download/" + (url_json.GetString() + 6);
            message->type = MessageType::FILE;
            prefix = "💾 Download ";
        } else if(strcmp(content_type.GetString(), "m.emote") == 0) { // this is a /me message, TODO: show /me messages differently
            message->type = MessageType::TEXT;
            prefix = "*" + room_data->get_user_display_name(user) + "* ";
        } else if(strcmp(content_type.GetString(), "m.notice") == 0) { // TODO: show notices differently
            message->type = MessageType::TEXT;
            prefix = "* NOTICE * ";
        } else if(strcmp(content_type.GetString(), "m.location") == 0) { // TODO: show locations differently
            const rapidjson::Value &geo_uri_json = GetMember(*content_json, "geo_uri");
            if(geo_uri_json.IsString())
                prefix = geo_uri_json.GetString() + std::string(" | ");

            message->type = MessageType::TEXT;
            message->thumbnail_url = message_content_extract_thumbnail_url(*content_json, homeserver);
            message_content_extract_thumbnail_size(*content_json, message->thumbnail_size);
        } else if(strcmp(content_type.GetString(), "m.server_notice") == 0) { // TODO: show server notices differently
            message->type = MessageType::TEXT;
            prefix = "* Server notice * ";
        } else {
            return nullptr;
        }

        message->user = user;
        message->event_id = event_id_str;
        message->body = prefix + body_json.GetString();
        message->related_event_id = std::move(related_event_id);
        message->related_event_type = related_event_type;
        message->timestamp = timestamp;
        message->transaction_id = std::move(transaction_id);
        return message;
    }

    // Returns empty string on error
    static std::string extract_user_name_from_user_id(const std::string &user_id) {
        size_t index = user_id.find(':');
        if(index == std::string::npos || index == 0 || user_id.empty() || user_id[0] != '@')
            return "";
        return user_id.substr(1, index - 1);
    }

    static std::string combine_user_display_names_for_room_name(std::vector<std::shared_ptr<UserInfo>> &user_info, const std::string &fallback_user_id) {
        std::string result;
        if(user_info.size() == 0)
            result = extract_user_name_from_user_id(fallback_user_id);
        else if(user_info.size() == 1)
            result = user_info[0]->room->get_user_display_name(user_info[0]);
        else if(user_info.size() == 2)
            result = user_info[0]->room->get_user_display_name(user_info[0]) + " and " + user_info[1]->room->get_user_display_name(user_info[1]);
        else if(user_info.size() > 2)
            result = user_info[0]->room->get_user_display_name(user_info[0]) + ", " + user_info[1]->room->get_user_display_name(user_info[1]) + " and " + std::to_string(user_info.size() - 2) + " other(s)";
        return result;
    }

    void Matrix::events_set_room_name(const rapidjson::Value &events_json, RoomData *room_data) {
        if(!events_json.IsArray())
            return;

        for(const rapidjson::Value &event_item_json : events_json.GetArray()) {
            if(!event_item_json.IsObject())
                continue;

            const rapidjson::Value &type_json = GetMember(event_item_json, "type");
            if(!type_json.IsString() || strcmp(type_json.GetString(), "m.room.name") != 0)
                continue;
            
            const rapidjson::Value &content_json = GetMember(event_item_json, "content");
            if(!content_json.IsObject())
                continue;

            const rapidjson::Value &name_json = GetMember(content_json, "name");
            if(!name_json.IsString())
                continue;

            room_data->set_name(name_json.GetString());
            room_data->name_is_fallback = false;
        }

        for(const rapidjson::Value &event_item_json : events_json.GetArray()) {
            if(!event_item_json.IsObject())
                continue;

            const rapidjson::Value &type_json = GetMember(event_item_json, "type");
            if(!type_json.IsString() || strcmp(type_json.GetString(), "m.room.avatar") != 0)
                continue;
            
            const rapidjson::Value &content_json = GetMember(event_item_json, "content");
            if(!content_json.IsObject())
                continue;

            const rapidjson::Value &url_json = GetMember(content_json, "url");
            if(!url_json.IsString())
                continue;

            std::string url_json_str = url_json.GetString() + 6;
            room_data->set_avatar_url(get_thumbnail_url(homeserver, thumbnail_url_extract_media_id(url_json_str)));
            room_data->avatar_is_fallback = false;
        }
    }

    void Matrix::set_room_name_to_users_if_empty(RoomData *room, const std::string &room_creator_user_id) {
        bool has_room_name = room->has_name();
        bool has_room_avatar_url = room->has_avatar_url();

        std::vector<std::shared_ptr<UserInfo>> users_excluding_me;
        if(!has_room_name || !has_room_avatar_url || room->name_is_fallback || room->avatar_is_fallback)
            users_excluding_me = room->get_users_excluding_me(my_user_id);

        if(!has_room_name) {
            room->set_name(combine_user_display_names_for_room_name(users_excluding_me, room_creator_user_id));
            room->name_is_fallback = true;
        }

        if(!has_room_avatar_url) {
            if(users_excluding_me.empty()) {
                auto user = get_user_by_id(room, room_creator_user_id);
                if(user)
                    room->set_avatar_url(room->get_user_avatar_url(user));
            } else {
                // TODO: If there are multiple users, then we want to use some other type of avatar, not the first users avatar
                room->set_avatar_url(room->get_user_avatar_url(users_excluding_me.front()));
            }
            room->avatar_is_fallback = true;
        }
    }

    void Matrix::events_add_pinned_events(const rapidjson::Value &events_json, RoomData *room_data) {
        if(!events_json.IsArray())
            return;

        bool has_pinned_events = false;
        std::vector<std::string> pinned_events;
        for(const rapidjson::Value &event_item_json : events_json.GetArray()) {
            if(!event_item_json.IsObject())
                continue;

            const rapidjson::Value &type_json = GetMember(event_item_json, "type");
            if(!type_json.IsString() || strcmp(type_json.GetString(), "m.room.pinned_events") != 0)
                continue;
            
            const rapidjson::Value &content_json = GetMember(event_item_json, "content");
            if(!content_json.IsObject())
                continue;

            const rapidjson::Value &pinned_json = GetMember(content_json, "pinned");
            if(!pinned_json.IsArray())
                continue;

            has_pinned_events = true;
            pinned_events.clear();
            for(const rapidjson::Value &pinned_item_json : pinned_json.GetArray()) {
                if(!pinned_item_json.IsString())
                    continue;
                pinned_events.push_back(std::string(pinned_item_json.GetString(), pinned_item_json.GetStringLength()));
            }
        }

        if(has_pinned_events)
            room_data->set_pinned_events(std::move(pinned_events));
    }

    void Matrix::events_add_room_to_tags(const rapidjson::Value &events_json, RoomData *room_data) {
        if(!events_json.IsArray())
            return;

        bool has_tags = false;
        std::set<std::string> new_tags;
        for(const rapidjson::Value &event_item_json : events_json.GetArray()) {
            if(!event_item_json.IsObject())
                continue;

            const rapidjson::Value &type_json = GetMember(event_item_json, "type");
            if(!type_json.IsString() || strcmp(type_json.GetString(), "m.tag") != 0)
                continue;
            
            const rapidjson::Value &content_json = GetMember(event_item_json, "content");
            if(!content_json.IsObject())
                continue;

            const rapidjson::Value &tags_json = GetMember(content_json, "tags");
            if(!tags_json.IsObject())
                continue;

            has_tags = true;
            new_tags.clear();
            for(auto const &tag_json : tags_json.GetObject()) {
                if(!tag_json.name.IsString() || !tag_json.value.IsObject())
                    continue;

                //const char *tag_name = tag_get_name(tag_json.name.GetString(), tag_json.name.GetStringLength());
                //if(!tag_name)
                //    continue;

                // TODO: Support tag order
                new_tags.insert(std::string(tag_json.name.GetString(), tag_json.name.GetStringLength()));
            }
        }

        // Adding/removing tags is done with PUT and DELETE, but tags is part of account_data that contains all of the tags.
        // When we receive a list of tags its always the full list of tags
        if(has_tags) {
            room_data->acquire_room_lock();
            std::set<std::string> &room_tags = room_data->get_tags_unsafe();

            for(const std::string &room_tag : room_tags) {
                auto it = new_tags.find(room_tag);
                if(it == new_tags.end())
                    delegate->room_remove_tag(room_data, room_tag);
            }

            for(const std::string &new_tag : new_tags) {
                auto it = room_tags.find(new_tag);
                if(it == room_tags.end())
                    delegate->room_add_tag(room_data, new_tag);
            }

            if(new_tags.empty()) {
                new_tags.insert(OTHERS_ROOM_TAG);
                delegate->room_add_tag(room_data, OTHERS_ROOM_TAG);
            }

            room_tags = std::move(new_tags);
            room_data->release_room_lock();
        }
    }

    void Matrix::add_invites(const rapidjson::Value &invite_json) {
        if(!invite_json.IsObject())
            return;

        for(auto const &it : invite_json.GetObject()) {
            if(!it.value.IsObject())
                continue;

            const rapidjson::Value &room_id = it.name;
            if(!room_id.IsString())
                continue;

            const rapidjson::Value &invite_state_json = GetMember(it.value, "invite_state");
            if(!invite_state_json.IsObject())
                continue;

            const rapidjson::Value &events_json = GetMember(invite_state_json, "events");
            if(!events_json.IsArray())
                continue;
            
            for(const rapidjson::Value &event_json : events_json.GetArray()) {
                if(!event_json.IsObject())
                    continue;
                
                const rapidjson::Value &type_json = GetMember(event_json, "type");
                if(!type_json.IsString())
                    continue;

                if(strcmp(type_json.GetString(), "m.room.member") != 0)
                    continue;

                const rapidjson::Value &content_json = GetMember(event_json, "content");
                if(!content_json.IsObject())
                    continue;

                const rapidjson::Value &sender_json = GetMember(event_json, "sender");
                if(!sender_json.IsString())
                    continue;

                const rapidjson::Value &timestamp_json = GetMember(event_json, "origin_server_ts");
                if(!timestamp_json.IsInt64())
                    continue;
                
                const rapidjson::Value &membership_json = GetMember(content_json, "membership");
                if(membership_json.IsString() && strcmp(membership_json.GetString(), "invite") == 0) {
                    Invite invite;
                    RoomData invite_room;
                    events_add_user_info(events_json, &invite_room);
                    events_set_room_name(events_json, &invite_room);

                    std::string sender_json_str(sender_json.GetString(), sender_json.GetStringLength());
                    auto invited_by = get_user_by_id(&invite_room, sender_json_str);
                    if(!invited_by) {
                        fprintf(stderr, "Invited by unknown user. Bug in homeserver?\n");
                        break;
                    }

                    set_room_name_to_users_if_empty(&invite_room, sender_json_str);

                    invite.room_name = invite_room.get_name();
                    invite.room_avatar_url = invite_room.get_avatar_url();
                    invite.invited_by = invited_by;
                    invite.timestamp = timestamp_json.GetInt64();
                    invite.new_invite = !next_batch.empty();

                    std::string room_id_str(room_id.GetString(), room_id.GetStringLength());
                    if(set_invite(room_id_str, invite))
                        delegate->add_invite(room_id_str, std::move(invite));

                    break;
                }
            }
        }
    }

    void Matrix::remove_rooms(const rapidjson::Value &leave_json) {
        if(!leave_json.IsObject())
            return;

        for(auto const &it : leave_json.GetObject()) {
            if(!it.value.IsObject())
                continue;

            const rapidjson::Value &room_id = it.name;
            if(!room_id.IsString())
                continue;

            std::string room_id_str(room_id.GetString(), room_id.GetStringLength());
            if(remove_invite(room_id_str)) {
                // TODO: Show leave type and reason and who caused the invite to be removed
                delegate->remove_invite(room_id_str);
            }

            const rapidjson::Value &timeline_json = GetMember(it.value, "timeline");
            if(!timeline_json.IsObject())
                continue;

            const rapidjson::Value &events_json = GetMember(timeline_json, "events");
            if(!events_json.IsArray())
                continue;

            for(const rapidjson::Value &event_json : events_json.GetArray()) {
                if(!event_json.IsObject())
                    continue;

                const rapidjson::Value &type_json = GetMember(event_json, "type");
                if(!type_json.IsString() || strcmp(type_json.GetString(), "m.room.member") != 0)
                    continue;

                const rapidjson::Value &sender_json = GetMember(event_json, "sender");
                if(!sender_json.IsString())
                    continue;

                const rapidjson::Value &content_json = GetMember(event_json, "content");
                if(!content_json.IsObject())
                    continue;

                const rapidjson::Value &membership_json = GetMember(content_json, "membership");
                if(!membership_json.IsString())
                    continue;

                std::string reason_str;
                const rapidjson::Value &reason_json = GetMember(content_json, "reason");
                if(reason_json.IsString())
                    reason_str = reason_json.GetString();

                auto room = get_room_by_id(room_id_str);
                if(!room)
                    continue;

                std::string desc;
                LeaveType leave_type;
                if(strcmp(membership_json.GetString(), "leave") == 0) {
                    if(strcmp(sender_json.GetString(), my_user_id.c_str()) == 0) {
                        leave_type = LeaveType::LEAVE;
                    } else {
                        leave_type = LeaveType::KICKED;
                        desc = "You were kicked from " + room->get_name() + " by " + sender_json.GetString();
                    }
                } else if(strcmp(membership_json.GetString(), "ban") == 0) {
                    leave_type = LeaveType::BANNED;
                    desc = "You were banned from " + room->get_name() + " by " + sender_json.GetString();
                } else {
                    continue;
                }

                if(!reason_str.empty())
                    desc += ", reason: " + reason_str;

                delegate->leave_room(room, leave_type, desc);
                remove_room(room_id_str);
                break;
            }
        }
    }

    PluginResult Matrix::get_previous_room_messages(RoomData *room_data, bool latest_messages, size_t &num_new_messages) {
        num_new_messages = 0;
        std::string from = room_data->get_prev_batch();
        if(from.empty() || latest_messages)
            from = "END";

        rapidjson::Document request_data(rapidjson::kObjectType);
        request_data.AddMember("lazy_load_members", true, request_data.GetAllocator());

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-H", "Authorization: Bearer " + access_token }
        };

        std::string filter = url_param_encode(buffer.GetString());

        char url[512];
        snprintf(url, sizeof(url), "%s/_matrix/client/r0/rooms/%s/messages?from=%s&limit=20&dir=b&filter=%s", homeserver.c_str(), room_data->id.c_str(), from.c_str(), filter.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, url, std::move(additional_args), true);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        if(!json_root.IsObject())
            return PluginResult::ERR;

        const rapidjson::Value &state_json = GetMember(json_root, "state");
        events_add_user_info(state_json, room_data);
        //events_set_room_name(state_json, room_data);

        const rapidjson::Value &chunk_json = GetMember(json_root, "chunk");
        num_new_messages = events_add_messages(chunk_json, room_data, MessageDirection::BEFORE, false);

        const rapidjson::Value &end_json = GetMember(json_root, "end");
        if(!end_json.IsString()) {
            fprintf(stderr, "Warning: matrix messages response is missing 'end', this could happen if we received the very first messages in the room\n");
            return PluginResult::OK;
        }

        room_data->set_prev_batch(end_json.GetString());
        return PluginResult::OK;
    }

    static bool generate_random_characters(char *buffer, int buffer_size) {
        int fd = open("/dev/urandom", O_RDONLY);
        if(fd == -1) {
            perror("/dev/urandom");
            return false;
        }

        if(read(fd, buffer, buffer_size) < buffer_size) {
            fprintf(stderr, "Failed to read %d bytes from /dev/urandom\n", buffer_size);
            close(fd);
            return false;
        }

        close(fd);
        return true;
    }

    static std::string random_characters_to_readable_string(const char *buffer, int buffer_size) {
        std::ostringstream result;
        result << std::hex;
        for(int i = 0; i < buffer_size; ++i)
            result << (int)(unsigned char)buffer[i];
        return result.str();
    }

    std::string create_transaction_id() {
        char random_characters[18];
        if(!generate_random_characters(random_characters, sizeof(random_characters)))
            return "";

        std::string random_readable_chars = random_characters_to_readable_string(random_characters, sizeof(random_characters));
        return "m." + std::to_string(time(NULL)) + random_readable_chars;
    }

    static const char* content_type_to_message_type(ContentType content_type) {
        if(is_content_type_video(content_type))
            return "m.video";
        else if(is_content_type_audio(content_type))
            return "m.audio";
        else if(is_content_type_image(content_type))
            return "m.image";
        else
            return "m.file";
    }

    static size_t find_backquote_index_with_escape(const std::string &str, size_t start_index = 0) {
        bool escape = false;
        for(size_t i = start_index; i < str.size(); ++i) {
            char c = str[i];
            if(c == '\\') {
                escape = !escape;
            } else if(c == '`' && !escape) {
                return i;
            } else {
                escape = false;
            }
        }
        return std::string::npos;
    }

    static void formatted_body_add_line(std::string &formatted_body, const std::string &line_str) {
        size_t index = 0;
        while(true) {
            size_t backquote_start_index = find_backquote_index_with_escape(line_str, index);
            if(backquote_start_index != std::string::npos) {
                size_t backquote_end_index = find_backquote_index_with_escape(line_str, backquote_start_index + 1);
                if(backquote_end_index != std::string::npos) {
                    formatted_body += line_str.substr(index, backquote_start_index - index);
                    formatted_body += "<code>";
                    formatted_body += line_str.substr(backquote_start_index + 1, backquote_end_index - (backquote_start_index + 1));
                    formatted_body += "</code>";
                    index = backquote_end_index + 1;
                    continue;
                }
            }

            formatted_body += line_str.substr(index);
            break;
        }
    }

    static std::string body_to_formatted_body(const std::string &body) {
        std::string formatted_body;
        bool is_inside_code_block = false;
        bool is_first_line = true;
        string_split(body, '\n', [&formatted_body, &is_inside_code_block, &is_first_line](const char *str, size_t size){
            if(!is_first_line)
                formatted_body += "<br/>";

            std::string line_str(str, size);
            html_escape_sequences(line_str);
            if(size >= 3 && strncmp(str, "```", 3) == 0) {
                if(is_inside_code_block) {
                    formatted_body += "</code></pre>";
                    is_inside_code_block = false;
                } else {
                    if(size > 3) {
                        formatted_body += "<pre><code class=\"language-" + strip(line_str.substr(3)) + "\">";
                    } else {
                        formatted_body += "<pre><code>";
                    }
                    is_inside_code_block = true;
                }
                is_first_line = true;
            } else {
                if(!is_inside_code_block && size > 0 && str[0] == '>') {
                    formatted_body += "<font color=\"#789922\">";
                    formatted_body_add_line(formatted_body, line_str);
                    formatted_body += "</font>";
                } else {
                    if(is_inside_code_block)
                        formatted_body += line_str;
                    else
                        formatted_body_add_line(formatted_body, line_str);
                }
                is_first_line = false;
            }

            return true;
        });
        return formatted_body;
    }

    PluginResult Matrix::post_message(RoomData *room, const std::string &body, std::string &event_id_response, const std::optional<UploadInfo> &file_info, const std::optional<UploadInfo> &thumbnail_info, const std::string &msgtype) {
        std::string transaction_id = create_transaction_id();
        if(transaction_id.empty())
            return PluginResult::ERR;
        if(!file_info)
            my_events_transaction_ids.insert(transaction_id);

        std::string formatted_body;
        if(!file_info)
            formatted_body = body_to_formatted_body(body);

        rapidjson::Document request_data(rapidjson::kObjectType);
        if(msgtype.empty())
            request_data.AddMember("msgtype", rapidjson::StringRef(file_info ? content_type_to_message_type(file_info->content_type) : "m.text"), request_data.GetAllocator());
        else
            request_data.AddMember("msgtype", rapidjson::StringRef(msgtype.c_str()), request_data.GetAllocator());
        request_data.AddMember("body", rapidjson::StringRef(body.c_str()), request_data.GetAllocator());
        if(!formatted_body.empty()) {
            request_data.AddMember("format", "org.matrix.custom.html", request_data.GetAllocator());
            request_data.AddMember("formatted_body", rapidjson::StringRef(formatted_body.c_str()), request_data.GetAllocator());
        }

        // TODO: Add hashblur?
        if(file_info) {
            rapidjson::Value info_json(rapidjson::kObjectType);
            info_json.AddMember("size", file_info->file_size, request_data.GetAllocator());
            info_json.AddMember("mimetype", rapidjson::StringRef(content_type_to_string(file_info->content_type)), request_data.GetAllocator());
            if(file_info->dimensions) {
                info_json.AddMember("w", file_info->dimensions->width, request_data.GetAllocator());
                info_json.AddMember("h", file_info->dimensions->height, request_data.GetAllocator());
            }
            if(file_info->duration_seconds) {
                // TODO: Check for overflow?
                info_json.AddMember("duration", (int)(file_info->duration_seconds.value() * 1000.0), request_data.GetAllocator());
            }

            if(thumbnail_info) {
                rapidjson::Value thumbnail_info_json(rapidjson::kObjectType);
                thumbnail_info_json.AddMember("size", thumbnail_info->file_size, request_data.GetAllocator());
                thumbnail_info_json.AddMember("mimetype", rapidjson::StringRef(content_type_to_string(thumbnail_info->content_type)), request_data.GetAllocator());
                if(thumbnail_info->dimensions) {
                    thumbnail_info_json.AddMember("w", thumbnail_info->dimensions->width, request_data.GetAllocator());
                    thumbnail_info_json.AddMember("h", thumbnail_info->dimensions->height, request_data.GetAllocator());
                }

                info_json.AddMember("thumbnail_url", rapidjson::StringRef(thumbnail_info->content_uri.c_str()), request_data.GetAllocator());
                info_json.AddMember("thumbnail_info", std::move(thumbnail_info_json), request_data.GetAllocator());
            }

            request_data.AddMember("info", std::move(info_json), request_data.GetAllocator());
            request_data.AddMember("url", rapidjson::StringRef(file_info->content_uri.c_str()), request_data.GetAllocator());
        }

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "PUT" },
            { "-H", "content-type: application/json" },
            { "-H", "Authorization: Bearer " + access_token },
            { "--data-binary", buffer.GetString() }
        };

        char request_url[512];
        snprintf(request_url, sizeof(request_url), "%s/_matrix/client/r0/rooms/%s/send/m.room.message/%s", homeserver.c_str(), room->id.c_str(), transaction_id.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, request_url, std::move(additional_args), true);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        if(!json_root.IsObject())
            return PluginResult::ERR;

        const rapidjson::Value &event_id_json = GetMember(json_root, "event_id");
        if(!event_id_json.IsString())
            return PluginResult::ERR;

        fprintf(stderr, "Matrix post message, response event id: %s\n", event_id_json.GetString());
        event_id_response = std::string(event_id_json.GetString(), event_id_json.GetStringLength());
        return PluginResult::OK;
    }

    std::string remove_reply_formatting(const std::string &str) {
        if(strncmp(str.c_str(), "> <@", 4) == 0) {
            size_t index = str.find("> ", 4);
            if(index != std::string::npos) {
                size_t msg_begin = str.find("\n\n", index + 2);
                if(msg_begin != std::string::npos)
                    return str.substr(msg_begin + 2);
            }
        }
        return str;
    }

    std::string message_get_body_remove_formatting(Message *message) {
        if(message->related_event_type == RelatedEventType::REPLY || message->related_event_type == RelatedEventType::EDIT)
            return remove_reply_formatting(message->body);
        else
            return message->body;
    }

    static std::string block_quote(const std::string &str) {
        std::string result;
        for(char c : str) {
            if(c == '>') {
                result += "\\>";
            } else if(c == '\n') {
                result += "\n> ";
            } else {
                result += c;
            }
        }
        return result;
    }

    static std::string get_reply_message(const Message *message) {
        std::string related_to_body;
        switch(message->type) {
            case MessageType::TEXT: {
                if(message->related_event_type != RelatedEventType::NONE)
                    related_to_body = remove_reply_formatting(message->body);
                else
                    related_to_body = message->body;
                break;
            }
            case MessageType::IMAGE:
                related_to_body = "sent an image";
                break;
            case MessageType::VIDEO:
                related_to_body = "sent a video";
                break;
            case MessageType::AUDIO:
                related_to_body = "sent an audio file";
                break;
            case MessageType::FILE:
                related_to_body = "sent a file";
                break;
            case MessageType::REDACTION:
                related_to_body = message->body;
                break;
        }
        return related_to_body;
    }

    static std::string create_body_for_message_reply(const Message *message, const std::string &body) {
        return "> <" + message->user->user_id + "> " + block_quote(get_reply_message(message)) + "\n\n" + body;
    }
    
    static std::string extract_homeserver_from_room_id(const std::string &room_id) {
        size_t sep_index = room_id.find(':');
        if(sep_index != std::string::npos)
            return room_id.substr(sep_index + 1);
        return "";
    }

    static std::string create_formatted_body_for_message_reply(RoomData *room, const Message *message, const std::string &body) {
        std::string formatted_body = body_to_formatted_body(body);
        std::string related_to_body = get_reply_message(message);
        html_escape_sequences(related_to_body);
        // TODO: Add keybind to navigate to the reply message, which would also depend on this formatting.
        // Note: user id and event id is not url escaped here on purpose, because that messes up riot.im replies for certain user ids...
        return "<mx-reply>"
                   "<blockquote>"
                       "<a href=\"https://matrix.to/#/" + room->id + "/" + message->event_id + "?via=" + extract_homeserver_from_room_id(room->id) + "\">In reply to</a>"
                       "<a href=\"https://matrix.to/#/" + message->user->user_id + "\"> " + message->user->user_id + "</a><br>" + std::move(related_to_body) +
                   "</blockquote>"
                "</mx-reply>" + std::move(formatted_body);
    }

    // TODO: Support greentext
    PluginResult Matrix::post_reply(RoomData *room, const std::string &body, void *relates_to, std::string &event_id_response, const std::string &custom_transaction_id) {
        // TODO: Store shared_ptr<Message> instead of raw pointer...
        Message *relates_to_message_raw = (Message*)relates_to;

        std::string transaction_id = custom_transaction_id;
        if(transaction_id.empty())
            transaction_id = create_transaction_id();

        if(transaction_id.empty())
            return PluginResult::ERR;

        my_events_transaction_ids.insert(transaction_id);

        rapidjson::Document in_reply_to_json(rapidjson::kObjectType);
        in_reply_to_json.AddMember("event_id", rapidjson::StringRef(relates_to_message_raw->event_id.c_str()), in_reply_to_json.GetAllocator());

        rapidjson::Document relates_to_json(rapidjson::kObjectType);
        relates_to_json.AddMember("m.in_reply_to", std::move(in_reply_to_json), relates_to_json.GetAllocator());

        std::string message_reply_body = create_body_for_message_reply(relates_to_message_raw, body); // Yes, the reply is to the edited message but the event_id reference is to the original message...
        std::string formatted_message_reply_body = create_formatted_body_for_message_reply(room, relates_to_message_raw, body);

        rapidjson::Document request_data(rapidjson::kObjectType);
        request_data.AddMember("msgtype", "m.text", request_data.GetAllocator()); // TODO: Allow image reply? element doesn't do that but we could!
        request_data.AddMember("body", rapidjson::StringRef(message_reply_body.c_str()), request_data.GetAllocator());
        request_data.AddMember("format", "org.matrix.custom.html", request_data.GetAllocator());
        request_data.AddMember("formatted_body", rapidjson::StringRef(formatted_message_reply_body.c_str()), request_data.GetAllocator());
        request_data.AddMember("m.relates_to", std::move(relates_to_json), request_data.GetAllocator());

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "PUT" },
            { "-H", "content-type: application/json" },
            { "-H", "Authorization: Bearer " + access_token },
            { "--data-binary", buffer.GetString() }
        };

        char request_url[512];
        snprintf(request_url, sizeof(request_url), "%s/_matrix/client/r0/rooms/%s/send/m.room.message/%s", homeserver.c_str(), room->id.c_str(), transaction_id.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, request_url, std::move(additional_args), true);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        if(!json_root.IsObject())
            return PluginResult::ERR;

        const rapidjson::Value &event_id_json = GetMember(json_root, "event_id");
        if(!event_id_json.IsString())
            return PluginResult::ERR;

        fprintf(stderr, "Matrix post reply, response event id: %s\n", event_id_json.GetString());
        event_id_response = std::string(event_id_json.GetString(), event_id_json.GetStringLength());
        return PluginResult::OK;
    }

    PluginResult Matrix::post_edit(RoomData *room, const std::string &body, void *relates_to, std::string &event_id_response) {
        Message *relates_to_message_raw = (Message*)relates_to;

        std::string transaction_id = create_transaction_id();
        if(transaction_id.empty())
            return PluginResult::ERR;
        my_events_transaction_ids.insert(transaction_id);

        std::string formatted_body = body_to_formatted_body(body);

        rapidjson::Document new_content_json(rapidjson::kObjectType);
        new_content_json.AddMember("msgtype", "m.text", new_content_json.GetAllocator());
        new_content_json.AddMember("body", rapidjson::StringRef(body.c_str()), new_content_json.GetAllocator());
        if(!formatted_body.empty()) {
            new_content_json.AddMember("format", "org.matrix.custom.html", new_content_json.GetAllocator());
            new_content_json.AddMember("formatted_body", rapidjson::StringRef(formatted_body.c_str()), new_content_json.GetAllocator());
        }

        rapidjson::Document relates_to_json(rapidjson::kObjectType);
        relates_to_json.AddMember("event_id", rapidjson::StringRef(relates_to_message_raw->event_id.c_str()), relates_to_json.GetAllocator());
        relates_to_json.AddMember("rel_type", "m.replace", relates_to_json.GetAllocator());

        std::string body_edit_str = " * " + body;
        std::string formatted_body_edit_str;

        rapidjson::Document request_data(rapidjson::kObjectType);
        request_data.AddMember("msgtype", "m.text", request_data.GetAllocator()); // TODO: Allow other types of edits
        request_data.AddMember("body", rapidjson::StringRef(body_edit_str.c_str()), request_data.GetAllocator());
        if(!formatted_body.empty()) {
            formatted_body_edit_str = " * " + formatted_body;
            request_data.AddMember("format", "org.matrix.custom.html", request_data.GetAllocator());
            request_data.AddMember("formatted_body", rapidjson::StringRef(formatted_body_edit_str.c_str()), request_data.GetAllocator());
        }
        request_data.AddMember("m.new_content", std::move(new_content_json), request_data.GetAllocator());
        request_data.AddMember("m.relates_to", std::move(relates_to_json), request_data.GetAllocator());

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "PUT" },
            { "-H", "content-type: application/json" },
            { "-H", "Authorization: Bearer " + access_token },
            { "--data-binary", buffer.GetString() }
        };

        char request_url[512];
        snprintf(request_url, sizeof(request_url), "%s/_matrix/client/r0/rooms/%s/send/m.room.message/%s", homeserver.c_str(), room->id.c_str(), transaction_id.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, request_url, std::move(additional_args), true);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        if(!json_root.IsObject())
            return PluginResult::ERR;

        const rapidjson::Value &event_id_json = GetMember(json_root, "event_id");
        if(!event_id_json.IsString())
            return PluginResult::ERR;

        fprintf(stderr, "Matrix post edit, response event id: %s\n", event_id_json.GetString());
        event_id_response = std::string(event_id_json.GetString(), event_id_json.GetStringLength());
        return PluginResult::OK;
    }

    PluginResult Matrix::post_reaction(RoomData *room, const std::string &body, void *relates_to, std::string &event_id_response) {
        Message *relates_to_message_raw = (Message*)relates_to;

        std::string transaction_id = create_transaction_id();
        if(transaction_id.empty())
            return PluginResult::ERR;
        my_events_transaction_ids.insert(transaction_id);

        rapidjson::Document relates_to_json(rapidjson::kObjectType);
        relates_to_json.AddMember("event_id", rapidjson::StringRef(relates_to_message_raw->event_id.c_str()), relates_to_json.GetAllocator());
        relates_to_json.AddMember("key", rapidjson::StringRef(body.c_str()), relates_to_json.GetAllocator());
        relates_to_json.AddMember("rel_type", "m.annotation", relates_to_json.GetAllocator());

        rapidjson::Document request_json(rapidjson::kObjectType);
        request_json.AddMember("m.relates_to", std::move(relates_to_json), request_json.GetAllocator());

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_json.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "PUT" },
            { "-H", "content-type: application/json" },
            { "-H", "Authorization: Bearer " + access_token },
            { "--data-binary", buffer.GetString() }
        };

        char request_url[512];
        snprintf(request_url, sizeof(request_url), "%s/_matrix/client/r0/rooms/%s/send/m.reaction/%s", homeserver.c_str(), room->id.c_str(), transaction_id.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, request_url, std::move(additional_args), true);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        if(!json_root.IsObject())
            return PluginResult::ERR;

        const rapidjson::Value &event_id_json = GetMember(json_root, "event_id");
        if(!event_id_json.IsString())
            return PluginResult::ERR;

        fprintf(stderr, "Matrix post reaction, response event id: %s\n", event_id_json.GetString());
        event_id_response = std::string(event_id_json.GetString(), event_id_json.GetStringLength());
        return PluginResult::OK;
    }

    std::shared_ptr<Message> Matrix::get_message_by_id(RoomData *room, const std::string &event_id) {
        std::shared_ptr<Message> existing_room_message = room->get_message_by_id(event_id);
        if(existing_room_message)
            return existing_room_message;

        auto fetched_message_it = room->fetched_messages_by_event_id.find(event_id);
        if(fetched_message_it != room->fetched_messages_by_event_id.end())
            return fetched_message_it->second;
#if 0
        rapidjson::Document request_data(rapidjson::kObjectType);
        request_data.AddMember("lazy_load_members", true, request_data.GetAllocator());

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-H", "Authorization: Bearer " + access_token }
        };

        std::string filter = url_param_encode(buffer.GetString());

        char url[512];
        snprintf(url, sizeof(url), "%s/_matrix/client/r0/rooms/%s/context/%s?limit=0&filter=%s", homeserver.c_str(), room->id.c_str(), event_id.c_str(), filter.c_str());
#else
        std::vector<CommandArg> additional_args = {
            { "-H", "Authorization: Bearer " + access_token }
        };

        char url[512];
        snprintf(url, sizeof(url), "%s/_matrix/client/r0/rooms/%s/event/%s", homeserver.c_str(), room->id.c_str(), event_id.c_str());
#endif
        std::string response;
        DownloadResult download_result = download_to_string_cache(url, response, std::move(additional_args), true, [](std::string &response) {
            rapidjson::Document json_root;
            rapidjson::ParseResult parse_result = json_root.Parse(response.c_str(), response.size());
            if(parse_result.IsError() || !json_root.IsObject())
                return false;

            const rapidjson::Value &errcode_json = GetMember(json_root, "errcode");
            if(errcode_json.IsString()) {
                if(strcmp(errcode_json.GetString(), "M_FORBIDDEN") == 0)
                    return true;
                else
                    return false;
            }

            return true;
        }, get_cache_dir().join("matrix").join("events").join(base64_url::encode(event_id)));
        if(download_result != DownloadResult::OK) {
            fprintf(stderr, "Failed to get message by id %s, error: %s\n", event_id.c_str(), response.c_str());
            room->fetched_messages_by_event_id.insert(std::make_pair(event_id, nullptr));
            return nullptr;
        }

        rapidjson::Document json_root;
        rapidjson::ParseResult parse_result = json_root.Parse(response.c_str(), response.size());
        if(parse_result.IsError()) {
            fprintf(stderr, "Failed to get message by id %s, error: %s\n", event_id.c_str(), response.c_str());
            room->fetched_messages_by_event_id.insert(std::make_pair(event_id, nullptr));
            return nullptr;
        }

        if(!json_root.IsObject()) {
            fprintf(stderr, "Failed to get message by id %s, error: %s\n", event_id.c_str(), response.c_str());
            room->fetched_messages_by_event_id.insert(std::make_pair(event_id, nullptr));
            return nullptr;
        }

        const rapidjson::Value &errcode_json = GetMember(json_root, "errcode");
        if(errcode_json.IsString() && strcmp(errcode_json.GetString(), "M_FORBIDDEN") == 0) {
            fprintf(stderr, "You don't have permission to access event %s\n", event_id.c_str());
            room->fetched_messages_by_event_id.insert(std::make_pair(event_id, nullptr));
            return nullptr;
        }

        const rapidjson::Value &error_json = GetMember(json_root, "error");
        if(error_json.IsString()) {
            fprintf(stderr, "Matrix::get_message_by_id for event id: %s, error: %s\n", event_id.c_str(), error_json.GetString());
            room->fetched_messages_by_event_id.insert(std::make_pair(event_id, nullptr));
            return nullptr;
        }
#if 0
        const rapidjson::Value &state_json = GetMember(json_root, "state");
        events_add_user_info(state_json, room);
#endif
        //events_set_room_name(state_json, room);
#if 0
        const rapidjson::Value &event_json = GetMember(json_root, "event");
        std::shared_ptr<Message> new_message = parse_message_event(event_json, room);
#else
        std::shared_ptr<Message> new_message = parse_message_event(json_root, room);
#endif
        room->fetched_messages_by_event_id.insert(std::make_pair(event_id, new_message));
        return new_message;
    }

    static const char* file_get_filename(const std::string &filepath) {
        size_t index = filepath.rfind('/');
        if(index == std::string::npos)
            return filepath.c_str();
        return filepath.c_str() + index + 1;
    }

    PluginResult Matrix::post_file(RoomData *room, const std::string &filepath, std::string &event_id_response, std::string &err_msg) {
        UploadInfo file_info;
        UploadInfo thumbnail_info;
        PluginResult upload_file_result = upload_file(room, filepath, file_info, thumbnail_info, err_msg);
        if(upload_file_result != PluginResult::OK)
            return upload_file_result;

        std::optional<UploadInfo> file_info_opt = std::move(file_info);
        std::optional<UploadInfo> thumbnail_info_opt;
        if(!thumbnail_info.content_uri.empty())
            thumbnail_info_opt = std::move(thumbnail_info);

        const char *filename = file_get_filename(filepath);
        return post_message(room, filename, event_id_response, file_info_opt, thumbnail_info_opt);
    }

    PluginResult Matrix::upload_file(RoomData *room, const std::string &filepath, UploadInfo &file_info, UploadInfo &thumbnail_info, std::string &err_msg, bool upload_thumbnail) {
        FileAnalyzer file_analyzer;
        if(!file_analyzer.load_file(filepath.c_str())) {
            err_msg = "Failed to load " + filepath;
            return PluginResult::ERR;
        }

        file_info.content_type = file_analyzer.get_content_type();
        file_info.file_size = file_analyzer.get_file_size();
        file_info.dimensions = file_analyzer.get_dimensions();
        file_info.duration_seconds = file_analyzer.get_duration_seconds();

        int upload_limit;
        PluginResult config_result = get_config(&upload_limit);
        if(config_result != PluginResult::OK) {
            err_msg = "Failed to get file size limit from server";
            return config_result;
        }

        // Checking for sane file size limit client side, to prevent loading a huge file and crashing
        if(file_analyzer.get_file_size() > 300 * 1024 * 1024) { // 300mb
            err_msg = "File is too large! client-side limit is set to 300mb";
            return PluginResult::ERR;
        }

        if((int)file_analyzer.get_file_size() > upload_limit) {
            err_msg = "File is too large! max upload size on your homeserver is " + std::to_string(upload_limit) + " bytes, the file you tried to upload is " + std::to_string(file_analyzer.get_file_size()) + " bytes";
            return PluginResult::ERR;
        }

        if(upload_thumbnail && is_content_type_video(file_analyzer.get_content_type())) {
            char tmp_filename[] = "/tmp/quickmedia_video_frame_XXXXXX";
            int tmp_file = mkstemp(tmp_filename);
            if(tmp_file != -1) {
                if(video_get_first_frame(filepath.c_str(), tmp_filename, thumbnail_max_size.x, thumbnail_max_size.y)) {
                    UploadInfo upload_info_ignored; // Ignore because it wont be set anyways. Thumbnails dont have thumbnails.
                    PluginResult upload_thumbnail_result = upload_file(room, tmp_filename, thumbnail_info, upload_info_ignored, err_msg, false);
                    if(upload_thumbnail_result != PluginResult::OK) {
                        close(tmp_file);
                        remove(tmp_filename);
                        return upload_thumbnail_result;
                    }
                } else {
                    fprintf(stderr, "Failed to get first frame of video, ignoring thumbnail...\n");
                }
                close(tmp_file);
                remove(tmp_filename);
            } else {
                fprintf(stderr, "Failed to create temporary file for video thumbnail, ignoring thumbnail...\n");
            }
        } else if(upload_thumbnail && is_content_type_image(file_analyzer.get_content_type())) {
            char tmp_filename[] = "/tmp/quickmedia_thumbnail_XXXXXX";
            int tmp_file = mkstemp(tmp_filename);
            if(tmp_file != -1) {
                std::string thumbnail_path;
                if(create_thumbnail(filepath, tmp_filename, thumbnail_max_size))
                    thumbnail_path = tmp_filename;
                else
                    thumbnail_path = filepath;

                UploadInfo upload_info_ignored; // Ignore because it wont be set anyways. Thumbnails dont have thumbnails.
                PluginResult upload_thumbnail_result = upload_file(room, thumbnail_path, thumbnail_info, upload_info_ignored, err_msg, false);
                if(upload_thumbnail_result != PluginResult::OK) {
                    close(tmp_file);
                    remove(tmp_filename);
                    return upload_thumbnail_result;
                }

                close(tmp_file);
                remove(tmp_filename);
            } else {
                fprintf(stderr, "Failed to create temporary file for image thumbnail, ignoring thumbnail...\n");
            }
        }

        std::vector<CommandArg> additional_args = {
            { "-X", "POST" },
            { "-H", std::string("content-type: ") + content_type_to_string(file_analyzer.get_content_type()) },
            { "-H", "Authorization: Bearer " + access_token },
            { "--data-binary", "@" + filepath }
        };

        const char *filename = file_get_filename(filepath);
        std::string filename_escaped = url_param_encode(filename);

        char url[512];
        snprintf(url, sizeof(url), "%s/_matrix/media/r0/upload?filename=%s", homeserver.c_str(), filename_escaped.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, url, std::move(additional_args), true, &err_msg);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        if(!json_root.IsObject()) {
            err_msg = "Got corrupt response from server";
            return PluginResult::ERR;
        }

        const rapidjson::Value &error_json = GetMember(json_root, "error");
        if(error_json.IsString()) {
            err_msg = error_json.GetString();
            return PluginResult::ERR;
        }

        const rapidjson::Value &content_uri_json = GetMember(json_root, "content_uri");
        if(!content_uri_json.IsString()) {
            err_msg = "Missing content_uri is server response";
            return PluginResult::ERR;
        }

        fprintf(stderr, "Matrix upload, response content uri: %s\n", content_uri_json.GetString());
        file_info.content_uri = content_uri_json.GetString();
        return PluginResult::OK;
    }

    PluginResult Matrix::login(const std::string &username, const std::string &password, const std::string &homeserver, std::string &err_msg) {
        assert(!sync_running);
        rapidjson::Document identifier_json(rapidjson::kObjectType);
        identifier_json.AddMember("type", "m.id.user", identifier_json.GetAllocator()); // TODO: What if the server doesn't support this login type? redirect to sso web page etc
        identifier_json.AddMember("user", rapidjson::StringRef(username.c_str()), identifier_json.GetAllocator());

        rapidjson::Document request_data(rapidjson::kObjectType);
        request_data.AddMember("type", "m.login.password", request_data.GetAllocator());
        request_data.AddMember("identifier", std::move(identifier_json), request_data.GetAllocator());
        request_data.AddMember("password", rapidjson::StringRef(password.c_str()), request_data.GetAllocator());
        request_data.AddMember("initial_device_display_name", "QuickMedia", request_data.GetAllocator()); // :^)

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "POST" },
            { "-H", "content-type: application/json" },
            { "--data-binary", buffer.GetString() }
        };

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, homeserver + "/_matrix/client/r0/login", std::move(additional_args), true, &err_msg);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        Path matrix_sync_data_path = get_cache_dir().join("matrix").join("sync_data.json");
        remove(matrix_sync_data_path.data.c_str());
        Path filter_cache_path = get_storage_dir().join("matrix").join("filter");
        remove(filter_cache_path.data.c_str());
        for_files_in_dir(get_cache_dir().join("matrix").join("events"), [](const std::filesystem::path &filepath) {
            remove(filepath.c_str());
            return true;
        });

        if(!json_root.IsObject()) {
            err_msg = "Failed to parse matrix login response";
            return PluginResult::ERR;
        }

        const rapidjson::Value &error_json = GetMember(json_root, "error");
        if(error_json.IsString()) {
            err_msg = error_json.GetString();
            return PluginResult::ERR;
        }

        const rapidjson::Value &user_id_json = GetMember(json_root, "user_id");
        if(!user_id_json.IsString()) {
            err_msg = "Failed to parse matrix login response";
            return PluginResult::ERR;
        }

        const rapidjson::Value &access_token_json = GetMember(json_root, "access_token");
        if(!access_token_json.IsString()) {
            err_msg = "Failed to parse matrix login response";
            return PluginResult::ERR;
        }

        const rapidjson::Value &home_server_json = GetMember(json_root, "home_server");
        if(home_server_json.IsString())
            this->homeserver_domain = home_server_json.GetString();

        // Use the user-provided homeserver instead of the one the server tells us about, otherwise this wont work with a proxy
        // such as pantalaimon
        json_root.AddMember("homeserver", rapidjson::StringRef(homeserver.c_str()), request_data.GetAllocator());

        this->my_user_id = user_id_json.GetString();
        this->access_token = access_token_json.GetString();
        this->homeserver = homeserver;

        // TODO: Handle well_known field. The spec says clients SHOULD handle it if its provided

        Path session_path = get_storage_dir().join(SERVICE_NAME);
        if(create_directory_recursive(session_path) == 0) {
            session_path.join("session.json");
            if(!save_json_to_file_atomic(session_path, json_root)) {
                fprintf(stderr, "Warning: failed to save login response to %s\n", session_path.data.c_str());
            }
        } else {
            fprintf(stderr, "Warning: failed to create directory: %s\n", session_path.data.c_str());
        }

        return PluginResult::OK;
    }

    PluginResult Matrix::logout() {
        assert(!sync_running);
        Path session_path = get_storage_dir().join(SERVICE_NAME).join("session.json");
        remove(session_path.data.c_str());

        std::vector<CommandArg> additional_args = {
            { "-X", "POST" },
            { "-H", "Authorization: Bearer " + access_token }
        };

        std::string server_response;
        download_to_string(homeserver + "/_matrix/client/r0/logout", server_response, std::move(additional_args), true);

        // Make sure all fields are reset here!
        rooms.clear();
        room_data_by_id.clear();
        my_user_id.clear();
        access_token.clear();
        homeserver.clear();
        homeserver_domain.clear();
        upload_limit.reset();
        set_next_batch("");
        invites.clear();
        filter_cached.reset();
        my_events_transaction_ids.clear();

        return PluginResult::OK;
    }

    PluginResult Matrix::delete_message(RoomData *room, void *message, std::string &err_msg){
        std::string transaction_id = create_transaction_id();
        if(transaction_id.empty())
            return PluginResult::ERR;
        //my_events_transaction_ids.insert(transaction_id);

        Message *message_typed = (Message*)message;

        // request_data could contains "reason", maybe it should be added sometime in the future?
        rapidjson::Value request_data(rapidjson::kObjectType);
        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "PUT" },
            { "-H", "content-type: application/json" },
            { "-H", "Authorization: Bearer " + access_token },
            { "--data-binary", buffer.GetString() }
        };

        char url[512];
        snprintf(url, sizeof(url), "%s/_matrix/client/r0/rooms/%s/redact/%s/%s", homeserver.c_str(), room->id.c_str(), message_typed->event_id.c_str(), transaction_id.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, url, std::move(additional_args), true, &err_msg);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        if(!json_root.IsObject()) {
            err_msg = "Failed to parse matrix login response";
            return PluginResult::ERR;
        }

        const rapidjson::Value &error_json = GetMember(json_root, "error");
        if(error_json.IsString()) {
            err_msg = error_json.GetString();
            return PluginResult::ERR;
        }

        const rapidjson::Value &event_id_json = GetMember(json_root, "event_id");
        if(!event_id_json.IsString())
            return PluginResult::ERR;

        fprintf(stderr, "Matrix delete message, response event id: %s\n", event_id_json.GetString());
        return PluginResult::OK;
    }

    PluginResult Matrix::load_cached_session() {
        Path session_path = get_storage_dir().join(SERVICE_NAME).join("session.json");
        std::string session_json_content;
        if(file_get_content(session_path, session_json_content) != 0) {
            fprintf(stderr, "Info: failed to read matrix session from %s. Either its missing or we failed to read the file\n", session_path.data.c_str());
            return PluginResult::ERR;
        }

        rapidjson::Document json_root;
        rapidjson::ParseResult parse_result = json_root.Parse(session_json_content.c_str(), session_json_content.size());
        if(parse_result.IsError()) {
            fprintf(stderr, "Matrix cached session parse error: %d\n", parse_result.Code());
            return PluginResult::ERR;
        }

        if(!json_root.IsObject())
            return PluginResult::ERR;

        const rapidjson::Value &user_id_json = GetMember(json_root, "user_id");
        if(!user_id_json.IsString()) {
            fprintf(stderr, "Failed to parse matrix cached session response\n");
            return PluginResult::ERR;
        }

        const rapidjson::Value &access_token_json = GetMember(json_root, "access_token");
        if(!access_token_json.IsString()) {
            fprintf(stderr, "Failed to parse matrix cached session response\n");
            return PluginResult::ERR;
        }

        const rapidjson::Value &homeserver_json = GetMember(json_root, "homeserver");
        if(!homeserver_json.IsString()) {
            fprintf(stderr, "Failed to parse matrix cached session response\n");
            return PluginResult::ERR;
        }

        const rapidjson::Value &home_server_json = GetMember(json_root, "home_server");
        if(home_server_json.IsString())
            this->homeserver_domain = home_server_json.GetString();

        this->my_user_id = user_id_json.GetString();
        this->access_token = access_token_json.GetString();
        this->homeserver = homeserver_json.GetString();
        return PluginResult::OK;
    }

    PluginResult Matrix::on_start_typing(RoomData *room) {
        rapidjson::Document request_data(rapidjson::kObjectType);
        request_data.AddMember("typing", true, request_data.GetAllocator());
        request_data.AddMember("timeout", 30000, request_data.GetAllocator()); // 30 sec timeout

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "PUT" },
            { "-H", "content-type: application/json" },
            { "--data-binary", buffer.GetString() },
            { "-H", "Authorization: Bearer " + access_token }
        };

        std::string server_response;
        DownloadResult download_result = download_to_string(homeserver + "/_matrix/client/r0/rooms/" + room->id + "/typing/" + url_param_encode(my_user_id) , server_response, std::move(additional_args), true);
        return download_result_to_plugin_result(download_result);
    }

    PluginResult Matrix::on_stop_typing(RoomData *room) {
        rapidjson::Document request_data(rapidjson::kObjectType);
        request_data.AddMember("typing", false, request_data.GetAllocator());

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "PUT" },
            { "-H", "content-type: application/json" },
            { "--data-binary", buffer.GetString() },
            { "-H", "Authorization: Bearer " + access_token }
        };

        std::string server_response;
        DownloadResult download_result = download_to_string(homeserver + "/_matrix/client/r0/rooms/" + room->id + "/typing/" + url_param_encode(my_user_id), server_response, std::move(additional_args), true);
        return download_result_to_plugin_result(download_result);
    }

    PluginResult Matrix::set_read_marker(RoomData *room, const std::string &event_id, int64_t event_timestamp) {
        rapidjson::Document request_data(rapidjson::kObjectType);
        request_data.AddMember("m.fully_read", rapidjson::StringRef(event_id.c_str()), request_data.GetAllocator());
        request_data.AddMember("m.read", rapidjson::StringRef(event_id.c_str()), request_data.GetAllocator());
        request_data.AddMember("m.hidden", false, request_data.GetAllocator()); // What is this for? element sends it but its not part of the documentation. Is it for hiding read receipt from other users? in that case, TODO: make it configurable

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "POST" },
            { "-H", "content-type: application/json" },
            { "--data-binary", buffer.GetString() },
            { "-H", "Authorization: Bearer " + access_token }
        };

        std::string server_response;
        DownloadResult download_result = download_to_string(homeserver + "/_matrix/client/r0/rooms/" + room->id + "/read_markers", server_response, std::move(additional_args), true);

        auto me = get_me(room);
        if(me)
            room->set_user_read_marker(me, event_id);

        set_qm_last_read_message_timestamp(room, event_timestamp);
        return download_result_to_plugin_result(download_result);
    }

    PluginResult Matrix::set_qm_last_read_message_timestamp(RoomData *room, int64_t timestamp) {
        rapidjson::Document request_data(rapidjson::kObjectType);
        request_data.AddMember("timestamp", timestamp, request_data.GetAllocator());

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "PUT" },
            { "-H", "content-type: application/json" },
            { "-H", "Authorization: Bearer " + access_token },
            { "--data-binary", buffer.GetString() }
        };

        room->read_marker_event_timestamp = timestamp;

        std::string server_response;
        DownloadResult download_result = download_to_string(homeserver + "/_matrix/client/r0/user/" + my_user_id + "/rooms/" + room->id + "/account_data/qm.last_read_message_timestamp", server_response, std::move(additional_args), true);
        return download_result_to_plugin_result(download_result);
    }

    PluginResult Matrix::join_room(const std::string &room_id) {
        assert(delegate);
        std::vector<CommandArg> additional_args = {
            { "-X", "POST" },
            { "-H", "content-type: application/json" },
            { "--data-binary", "{}" },
            { "-H", "Authorization: Bearer " + access_token }
        };

        std::string server_response;
        DownloadResult download_result = download_to_string(homeserver + "/_matrix/client/r0/join/" + room_id, server_response, std::move(additional_args), true);
        if(download_result == DownloadResult::OK) {
            std::lock_guard<std::mutex> invite_lock(invite_mutex);
            auto invite_it = invites.find(room_id);
            if(invite_it != invites.end()) {
                std::lock_guard<std::recursive_mutex> lock(room_data_mutex);
                RoomData *room = get_room_by_id(room_id);
                if(!room) {
                    auto new_room = std::make_unique<RoomData>();
                    new_room->id = room_id;
                    new_room->set_name(invite_it->second.room_name);
                    new_room->set_avatar_url(invite_it->second.room_avatar_url);
                    room = new_room.get();
                    add_room(std::move(new_room));

                    delegate->join_room(room);
                    room->acquire_room_lock();
                    std::set<std::string> &room_tags = room->get_tags_unsafe();
                    if(room_tags.empty()) {
                        room_tags.insert(OTHERS_ROOM_TAG);
                        delegate->room_add_tag(room, OTHERS_ROOM_TAG);
                    }
                    room->release_room_lock();
                }
            }
        }
        return download_result_to_plugin_result(download_result);
    }

    PluginResult Matrix::leave_room(const std::string &room_id) {
        std::vector<CommandArg> additional_args = {
            { "-X", "POST" },
            { "-H", "content-type: application/json" },
            { "--data-binary", "{}" },
            { "-H", "Authorization: Bearer " + access_token }
        };

        std::string server_response;
        DownloadResult download_result = download_to_string(homeserver + "/_matrix/client/r0/rooms/" + room_id + "/leave", server_response, std::move(additional_args), true);
        if(download_result == DownloadResult::OK) {
            RoomData *room = get_room_by_id(room_id);
            if(room) {
                delegate->leave_room(room, LeaveType::LEAVE, "");
                remove_room(room_id);
            }
        }
        return download_result_to_plugin_result(download_result);
    }

    PluginResult Matrix::get_public_rooms(const std::string &server, const std::string &search_term, const std::string &since, BodyItems &rooms, std::string &next_batch) {
        rapidjson::Document filter_data(rapidjson::kObjectType);
        if(!search_term.empty())
            filter_data.AddMember("generic_search_term", rapidjson::StringRef(search_term.c_str()), filter_data.GetAllocator());

        rapidjson::Document request_data(rapidjson::kObjectType);
        request_data.AddMember("limit", 20, request_data.GetAllocator());

        if(!search_term.empty())
            request_data.AddMember("filter", std::move(filter_data), request_data.GetAllocator());

        if(!since.empty())
            request_data.AddMember("since", rapidjson::StringRef(since.c_str()), request_data.GetAllocator());

        rapidjson::StringBuffer buffer;
        rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
        request_data.Accept(writer);

        std::vector<CommandArg> additional_args = {
            { "-X", "POST" },
            { "-H", "content-type: application/json" },
            { "-H", "Authorization: Bearer " + access_token },
            { "--data-binary", buffer.GetString() }
        };

        std::string url = homeserver + "/_matrix/client/r0/publicRooms?server=";
        url += url_param_encode(server);

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, url, std::move(additional_args), true);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        if(!json_root.IsObject())
            return PluginResult::ERR;

        const rapidjson::Value &next_batch_json = GetMember(json_root, "next_batch");
        if(next_batch_json.IsString())
            next_batch = next_batch_json.GetString();
        else
            next_batch.clear();

        const rapidjson::Value &chunk_json = GetMember(json_root, "chunk");
        if(chunk_json.IsArray()) {
            for(const rapidjson::Value &chunk_item_json : chunk_json.GetArray()) {
                if(!chunk_item_json.IsObject())
                    continue;

                const rapidjson::Value &room_id_json = GetMember(chunk_item_json, "room_id");
                if(!room_id_json.IsString())
                    continue;

                std::string room_name;
                const rapidjson::Value &name_json = GetMember(chunk_item_json, "name");
                if(name_json.IsString())
                    room_name = name_json.GetString();
                else
                    room_name = room_id_json.GetString();

                auto room_body_item = BodyItem::create(std::move(room_name));
                room_body_item->url = room_id_json.GetString();
                std::string description;

                const rapidjson::Value &topic_json = GetMember(chunk_item_json, "topic");
                if(topic_json.IsString())
                    description = strip(topic_json.GetString());

                const rapidjson::Value &canonical_alias_json = GetMember(chunk_item_json, "canonical_alias");
                if(canonical_alias_json.IsString()) {
                    if(!description.empty())
                        description += '\n';
                    description += canonical_alias_json.GetString();
                }

                const rapidjson::Value &num_joined_members_json = GetMember(chunk_item_json, "num_joined_members");
                if(num_joined_members_json.IsInt()) {
                    if(!description.empty())
                        description += '\n';
                    description += "👤" + std::to_string(num_joined_members_json.GetInt());
                }

                room_body_item->set_description(std::move(description));

                const rapidjson::Value &avatar_url_json = GetMember(chunk_item_json, "avatar_url");
                if(avatar_url_json.IsString()) {
                    std::string avatar_url = thumbnail_url_extract_media_id(avatar_url_json.GetString());
                    if(!avatar_url.empty())
                        avatar_url = get_thumbnail_url(homeserver, avatar_url);

                    if(!avatar_url.empty())
                        room_body_item->thumbnail_url = std::move(avatar_url);
                }
                room_body_item->thumbnail_size = sf::Vector2i(32 * get_ui_scale(), 32 * get_ui_scale());
                room_body_item->thumbnail_mask_type = ThumbnailMaskType::CIRCLE;

                rooms.push_back(std::move(room_body_item));
            }
        }

        return PluginResult::OK;
    }

    bool Matrix::was_message_posted_by_me(void *message) {
        Message *message_typed = (Message*)message;
        return my_user_id == message_typed->user->user_id;
    }

    std::string Matrix::message_get_author_displayname(Message *message) const {
        return message->user->room->get_user_display_name(message->user);
    }

    PluginResult Matrix::get_config(int *upload_size) {
        // TODO: What if the upload limit changes? is it possible for the upload limit to change while the server is running?
        if(upload_limit) {
            *upload_size = upload_limit.value();
            return PluginResult::OK;
        }

        *upload_size = 0;

        std::vector<CommandArg> additional_args = {
            { "-H", "Authorization: Bearer " + access_token }
        };

        char url[512];
        snprintf(url, sizeof(url), "%s/_matrix/media/r0/config", homeserver.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, url, std::move(additional_args), true);
        if(download_result != DownloadResult::OK) return download_result_to_plugin_result(download_result);

        if(!json_root.IsObject())
            return PluginResult::ERR;

        const rapidjson::Value &upload_size_json = GetMember(json_root, "m.upload.size");
        if(!upload_size_json.IsInt())
            return PluginResult::ERR;

        upload_limit = upload_size_json.GetInt();
        *upload_size = upload_limit.value();
        return PluginResult::OK;
    }

    std::shared_ptr<UserInfo> Matrix::get_me(RoomData *room) {
        return get_user_by_id(room, my_user_id);
    }

    const std::string& Matrix::get_homeserver_domain() const {
        return homeserver_domain;
    }

    RoomData* Matrix::get_room_by_id(const std::string &id) {
        std::lock_guard<std::recursive_mutex> lock(room_data_mutex);
        auto room_it = room_data_by_id.find(id);
        if(room_it == room_data_by_id.end())
            return nullptr;
        return rooms[room_it->second].get();
    }

    void Matrix::add_room(std::unique_ptr<RoomData> room) {
        std::lock_guard<std::recursive_mutex> lock(room_data_mutex);
        room->index = rooms.size();
        room_data_by_id.insert(std::make_pair(room->id, room->index));
        rooms.push_back(std::move(room));
    }

    void Matrix::remove_room(const std::string &room_id) {
        std::lock_guard<std::recursive_mutex> lock(room_data_mutex);
        auto room_it = room_data_by_id.find(room_id);
        if(room_it == room_data_by_id.end())
            return;

        // We want to clear data instead of removing the object iself becasue we want to instance to still be valid,
        // also in the future we can have a "history" tag for rooms we have just left
        rooms[room_it->second]->clear_data();
        room_data_by_id.erase(room_it);
    }

    bool Matrix::set_invite(const std::string &room_id, Invite invite) {
        std::lock_guard<std::mutex> lock(invite_mutex);
        auto res = invites.insert(std::make_pair(room_id, std::move(invite)));
        return res.second;
    }

    bool Matrix::remove_invite(const std::string &room_id) {
        std::lock_guard<std::mutex> lock(invite_mutex);
        auto invites_it = invites.find(room_id);
        if(invites_it != invites.end()) {
            invites.erase(invites_it);
            return true;
        }
        return false;
    }

    void Matrix::set_next_batch(std::string new_next_batch) {
        std::lock_guard<std::mutex> lock(next_batch_mutex);
        next_batch = std::move(new_next_batch);
    }

    std::string Matrix::get_next_batch() {
        std::lock_guard<std::mutex> lock(next_batch_mutex);
        return next_batch;
    }

    void Matrix::clear_sync_cache_for_new_sync() {
        std::lock_guard<std::recursive_mutex> room_data_lock(room_data_mutex);
        std::lock_guard<std::mutex> invites_lock(invite_mutex);
        for(auto &room : rooms) {
            room->clear_data();
        }
        // We intentionally dont clear |rooms| here because we want the objects inside it to still be valid. TODO: Clear |rooms| here
        //room_data_by_id.clear();
        invites.clear();
        delegate->clear_data();
    }

    std::shared_ptr<UserInfo> Matrix::get_user_by_id(RoomData *room, const std::string &user_id) {
        auto user = room->get_user_by_id(user_id);
        if(user)
            return user;

        //fprintf(stderr, "Unknown user: %s, creating locally... synapse bug?\n", user_id.c_str());
        auto user_info = std::make_shared<UserInfo>(room, user_id);
        room->add_user(user_info);
        return user_info;
    }

    void Matrix::update_user_with_latest_state(RoomData *room, const std::string &user_id) {
        char url[512];
        snprintf(url, sizeof(url), "%s/_matrix/client/r0/profile/%s", homeserver.c_str(), user_id.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, url, {}, true);
        if(download_result != DownloadResult::OK || !json_root.IsObject()) {
            fprintf(stderr, "Fetching profile for user %s failed!\n", user_id.c_str());
            auto user = get_user_by_id(room, user_id);
            assert(user);
            user->resolve_state = UserResolveState::RESOLVED;
            return;
        }

        parse_user_info(json_root, user_id, room);
    }

    void Matrix::update_room_users(RoomData *room) {
#if 1
        std::vector<CommandArg> additional_args = {
            { "-H", "Authorization: Bearer " + access_token }
        };

        char url[512];
        snprintf(url, sizeof(url), "%s/_matrix/client/r0/rooms/%s/joined_members", homeserver.c_str(), room->id.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, url, std::move(additional_args), true);
        if(download_result != DownloadResult::OK || !json_root.IsObject()) {
            fprintf(stderr, "Fetching users for room %s failed!\n", room->id.c_str());
            return;
        }

        const rapidjson::Value &joined_json = GetMember(json_root, "joined");
        if(!joined_json.IsObject())
            return;

        for(auto const &joined_obj : joined_json.GetObject()) {
            if(!joined_obj.name.IsString() || !joined_obj.value.IsObject())
                continue;

            const rapidjson::Value &avatar_url_json = GetMember(joined_obj.value, "avatar_url");
            const rapidjson::Value &display_name_json = GetMember(joined_obj.value, "display_name");
            const rapidjson::Value &displayname_json = GetMember(joined_obj.value, "displayname"); // Construct bug...
            std::string user_id(joined_obj.name.GetString(), joined_obj.name.GetStringLength());
            auto user = get_user_by_id(room, user_id);
            assert(user);

            std::string display_name;
            if(display_name_json.IsString())
                display_name = display_name_json.GetString();
            else if(displayname_json.IsString())
                display_name = displayname_json.GetString();
            else
                display_name = user_id;

            std::string avatar_url;
            if(avatar_url_json.IsString())
                avatar_url = std::string(avatar_url_json.GetString(), avatar_url_json.GetStringLength());
            if(!avatar_url.empty())
                avatar_url = get_thumbnail_url(homeserver, thumbnail_url_extract_media_id(avatar_url)); // TODO: Remove the constant strings around to reduce memory usage (6.3mb)
            room->set_user_avatar_url(user, std::move(avatar_url));
            room->set_user_display_name(user, std::move(display_name));
        }
#else
        std::vector<CommandArg> additional_args = {
            { "-H", "Authorization: Bearer " + access_token }
        };

        // TODO: Use at param? which is room->get_prev_batch();
        char url[512];
        snprintf(url, sizeof(url), "%s/_matrix/client/r0/rooms/%s/members?membership=join", homeserver.c_str(), room->id.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, url, std::move(additional_args), true);
        if(download_result != DownloadResult::OK || !json_root.IsObject()) {
            fprintf(stderr, "Fetching users for room %s failed!\n", room->id.c_str());
            return;
        }

        const rapidjson::Value &chunk_json = GetMember(json_root, "chunk");
        if(!chunk_json.IsArray())
            return;

        events_add_user_info(chunk_json, room);
#endif
    }

    // TODO: GET the filter to check if its valid?
    std::string Matrix::get_filter_cached() {
        #if 0
        if(filter_cached)
            return filter_cached.value();

        Path filter_path = get_storage_dir().join("matrix").join("filter");
        std::string file_content;
        if(file_get_content(filter_path, file_content) == 0) {
            fprintf(stderr, "Loaded filter from cache\n");
            filter_cached = file_content;
            return filter_cached.value();
        }

        fprintf(stderr, "Filter not available in cache, adding to server\n");

        std::vector<CommandArg> additional_args = {
            { "-X", "POST" },
            { "-H", "Authorization: Bearer " + access_token },
            { "--data-binary", FILTER }
        };

        char url[512];
        snprintf(url, sizeof(url), "%s/_matrix/client/r0/user/%s/filter", homeserver.c_str(), user_id.c_str());

        rapidjson::Document json_root;
        DownloadResult download_result = download_json(json_root, url, std::move(additional_args), true);
        if(download_result != DownloadResult::OK || !json_root.IsObject()) return FILTER;

        const rapidjson::Value &filter_id_json = GetMember(json_root, "filter_id");
        if(!filter_id_json.IsString())
            return FILTER;

        filter_cached = filter_id_json.GetString();
        Path filter_dir = get_storage_dir().join("matrix");
        if(create_directory_recursive(filter_dir) == 0) {
            file_overwrite_atomic(filter_path, filter_cached.value());
        }
        return filter_cached.value();
        #else
        assert(false);
        return INITIAL_FILTER;
        #endif
    }
}