#include "../../plugins/Manganelos.hpp"
#include "../../include/Notification.hpp"
#include "../../include/StringUtils.hpp"
#include "../../include/NetUtils.hpp"
#include <quickmedia/HtmlSearch.h>

namespace QuickMedia {
    static SearchResult search_page(const std::string &str, int page, BodyItems &result_items) {
        std::string url = "http://manganelos.com/search?q=";
        url += url_param_encode(str);
        url += "&page=" + std::to_string(page);

        std::string website_data;
        if(download_to_string(url, website_data, {}, true) != DownloadResult::OK)
            return SearchResult::NET_ERR;

        if(website_data.empty())
            return SearchResult::OK;

        QuickMediaHtmlSearch html_search;
        int result = quickmedia_html_search_init(&html_search, website_data.c_str());
        if(result != 0)
            goto cleanup;

        result = quickmedia_html_find_nodes_xpath(&html_search, "//div[class='media-left cover-manga']//a",
            [](QuickMediaHtmlNode *node, void *userdata) {
                auto *item_data = (BodyItems*)userdata;
                const char *href = quickmedia_html_node_get_attribute_value(node, "href");
                const char *title = quickmedia_html_node_get_attribute_value(node, "title");
                if(href && title && strstr(href, "/manga/")) {
                    auto item = BodyItem::create(strip(title));
                    item->url = href;
                    item_data->push_back(std::move(item));
                }
            }, &result_items);

        BodyItemContext body_item_image_context;
        body_item_image_context.body_items = &result_items;
        body_item_image_context.index = 0;

        result = quickmedia_html_find_nodes_xpath(&html_search, "//div[class='media-left cover-manga']//img[class='media-object']",
            [](QuickMediaHtmlNode *node, void *userdata) {
                auto *item_data = (BodyItemContext*)userdata;
                const char *src = quickmedia_html_node_get_attribute_value(node, "src");
                if(src && strstr(src, "/mangaimage/") && item_data->index < item_data->body_items->size()) {
                    (*item_data->body_items)[item_data->index]->thumbnail_url = src;
                    item_data->index++;
                }
            }, &body_item_image_context);

        cleanup:
        quickmedia_html_search_deinit(&html_search);
        return SearchResult::OK;
    }

    SearchResult ManganelosSearchPage::search(const std::string &str, BodyItems &result_items) {
        return search_page(str, 1, result_items);
    }

    PluginResult ManganelosSearchPage::get_page(const std::string &str, int page, BodyItems &result_items) {
        return search_result_to_plugin_result(search_page(str, 1 + page, result_items));
    }

    PluginResult ManganelosSearchPage::submit(const std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        BodyItems chapters_items;

        std::string website_data;
        if(download_to_string(url, website_data, {}, true) != DownloadResult::OK)
            return PluginResult::NET_ERR;

        QuickMediaHtmlSearch html_search;
        int result = quickmedia_html_search_init(&html_search, website_data.c_str());
        if(result != 0)
            goto cleanup;

        result = quickmedia_html_find_nodes_xpath(&html_search, "//section[id='examples']//div[class='chapter-list']//a",
            [](QuickMediaHtmlNode *node, void *userdata) {
                auto *item_data = (BodyItems*)userdata;
                const char *href = quickmedia_html_node_get_attribute_value(node, "href");
                const char *text = quickmedia_html_node_get_text(node);
                if(href && text) {
                    auto item = BodyItem::create(strip(text));
                    item->url = href;
                    item_data->push_back(std::move(item));
                }
            }, &chapters_items);

        cleanup:
        quickmedia_html_search_deinit(&html_search);
        if(result != 0)
            return PluginResult::ERR;

        auto body = create_body();
        body->items = std::move(chapters_items);
        result_tabs.push_back(Tab{std::move(body), std::make_unique<ManganelosChaptersPage>(program, title, url), create_search_bar("Search...", SEARCH_DELAY_FILTER)});
        return PluginResult::OK;
    }

    PluginResult ManganelosChaptersPage::submit(const std::string &title, const std::string &url, std::vector<Tab> &result_tabs) {
        result_tabs.push_back(Tab{nullptr, std::make_unique<ManganelosImagesPage>(program, content_title, title, url), nullptr});
        return PluginResult::OK;
    }

    bool ManganelosChaptersPage::extract_id_from_url(const std::string &url, std::string &manga_id) const {
        size_t start_index = url.find("/manga/");
        if(start_index == std::string::npos)
            return false;
        
        start_index += 7;
        size_t end_index = url.find("?", start_index);
        if(end_index == std::string::npos) {
            manga_id = url.substr(start_index);
            return true;
        }
        
        manga_id = url.substr(start_index, end_index - start_index);
        return true;
    }

    ImageResult ManganelosImagesPage::get_number_of_images(int &num_images) {
        num_images = 0;
        ImageResult image_result = get_image_urls_for_chapter(url);
        if(image_result != ImageResult::OK)
            return image_result;

        num_images = chapter_image_urls.size();
        return ImageResult::OK;
    }

    ImageResult ManganelosImagesPage::for_each_page_in_chapter(PageCallback callback) {
        std::vector<std::string> image_urls;
        ImageResult image_result = get_image_urls_for_chapter(url);
        if(image_result != ImageResult::OK)
            return image_result;

        image_urls = chapter_image_urls;

        for(const std::string &url : image_urls) {
            if(!callback(url))
                break;
        }

        return ImageResult::OK;
    }

    ImageResult ManganelosImagesPage::get_image_urls_for_chapter(const std::string &url) {
        if(!chapter_image_urls.empty())
            return ImageResult::OK;

        std::string website_data;
        if(download_to_string(url, website_data, {}, true) != DownloadResult::OK)
            return ImageResult::NET_ERR;

        QuickMediaHtmlSearch html_search;
        int result = quickmedia_html_search_init(&html_search, website_data.c_str());
        if(result != 0)
            goto cleanup;

        result = quickmedia_html_find_nodes_xpath(&html_search, "//p[id='arraydata']",
            [](QuickMediaHtmlNode *node, void *userdata) {
                std::vector<std::string> *chapter_image_urls = (std::vector<std::string>*)userdata;
                const char *text = quickmedia_html_node_get_text(node);
                string_split(text, ',', [chapter_image_urls](const char *str, size_t size) {
                    std::string url(str, size);
                    chapter_image_urls->push_back(std::move(url));
                    return true;
                });
            }, &chapter_image_urls);

        cleanup:
        quickmedia_html_search_deinit(&html_search);
        if(result != 0) {
            chapter_image_urls.clear();
            return ImageResult::ERR;
        }
        if(chapter_image_urls.empty())
            return ImageResult::ERR;
        return ImageResult::OK;
    }
}