#include "../include/UsersSidePanel.hpp"
#include "../include/ChannelTopPanel.hpp"
#include "../include/ResourceCache.hpp"
#include "../include/Settings.hpp"
#include "../include/Channel.hpp"
#include "../include/ColorScheme.hpp"
#include "../include/Gif.hpp"
#include <SFML/Graphics/RectangleShape.hpp>
#include <SFML/Graphics/CircleShape.hpp>
#include <SFML/Graphics/Sprite.hpp>
#include <SFML/Graphics/Text.hpp>
#include <vector>
#include <cmath>

using namespace std;

namespace dchat
{
    const float WIDTH = 250.0f;
    const unsigned int FONT_SIZE = 20;
    
    const float AVATAR_DIAMETER = 40.0f;
    const float AVATAR_PADDING_SIDE = 10.0f;
    const float PADDING_BOTTOM = 20.0f;
    const i64 USER_TIMEOUT_SEC = 10;
    
    static void renderUser(Cache &cache, User *user, sf::Shader *circleShader, sf::RenderWindow &window, sf::Vector2f &position, const sf::Font *font, const float textHeight, bool isUserOnline)
    {
        // Max avatar size = 1mb
        const ContentByUrlResult avatarResult = cache.getContentByUrl(user->avatarUrl, 1024 * 1024);
        if(avatarResult.type == ContentByUrlResult::Type::CACHED)
        {
            circleShader->setUniform("texture", sf::Shader::CurrentTexture);
            
            if(avatarResult.cachedType == ContentByUrlResult::CachedType::TEXTURE)
            {
                // TODO: Store this sprite somewhere, might not be efficient to create a new sprite object every frame
                sf::Sprite sprite(*avatarResult.texture);
                auto textureSize = avatarResult.texture->getSize();
                sprite.setPosition(sf::Vector2f(floor(position.x), floor(position.y)));
                sprite.setScale(sf::Vector2f(AVATAR_DIAMETER * Settings::getScaling() / (float)textureSize.x, AVATAR_DIAMETER * Settings::getScaling() / (float)textureSize.y));
                sprite.setColor(isUserOnline ? sf::Color::White : sf::Color(255, 255, 255, 100));
                window.draw(sprite, circleShader);
            }
            else if(avatarResult.cachedType == ContentByUrlResult::CachedType::GIF)
            {
                auto gifSize = avatarResult.gif->getSize();
                avatarResult.gif->setPosition(sf::Vector2f(floor(position.x), floor(position.y)));
                avatarResult.gif->setScale(sf::Vector2f(AVATAR_DIAMETER * Settings::getScaling() / (float)gifSize.x, AVATAR_DIAMETER * Settings::getScaling() / (float)gifSize.y));
                avatarResult.gif->setColor(isUserOnline ? sf::Color::White : sf::Color(255, 255, 255, 100));
                avatarResult.gif->draw(window, circleShader);
            }
        }
        else
        {
            sf::CircleShape avatarCircle(AVATAR_DIAMETER * 0.5f * Settings::getScaling(), 60 * Settings::getScaling());
            avatarCircle.setPosition(sf::Vector2f(floor(position.x), floor(position.y)));
            avatarCircle.setFillColor(isUserOnline ? ColorScheme::getBackgroundColor() + sf::Color(30, 30, 30) : ColorScheme::getBackgroundColor() * sf::Color(255, 255, 255, 100));
            window.draw(avatarCircle);
        }
        
        // TODO: Remove this shit
        sf::String str = sf::String::fromUtf8(user->getName().begin(), user->getName().end());
        sf::Text text(str, *font, FONT_SIZE * Settings::getScaling());
        text.setPosition(floor(position.x + (AVATAR_DIAMETER + AVATAR_PADDING_SIDE) * Settings::getScaling()), floor(position.y + AVATAR_DIAMETER * 0.5f - textHeight * 0.5f));
        text.setFillColor(isUserOnline ? sf::Color(15, 192, 252) : sf::Color(15, 192, 252, 100));
        window.draw(text);
        position.y += ((AVATAR_DIAMETER + PADDING_BOTTOM) * Settings::getScaling());
    }
    
    void UsersSidePanel::draw(sf::RenderWindow &window, Cache &cache)
    {
        float posY = ChannelTopPanel::getHeight();
        auto windowSize = window.getSize();
        sf::RectangleShape rect(sf::Vector2f(getWidth(), windowSize.y - ChannelTopPanel::getHeight()));
        rect.setFillColor(ColorScheme::getPanelColor());
        rect.setPosition(windowSize.x - getWidth(), posY);
        //window.draw(rect);
        
        Channel *currentChannel = Channel::getCurrent();
        if(!currentChannel) return;
        
        const sf::Font *font = ResourceCache::getFont("fonts/Nunito-Regular.ttf");
        sf::Vector2f position(rect.getPosition().x + 10.0f, posY);
        
        const float textHeight = font->getLineSpacing(FONT_SIZE * Settings::getScaling());
        
        i64 timestampSec = currentChannel->getSyncedTimestampUtcInSec();
        
        u32 numOnlineUsers = 0;
        u32 numOfflineUsers = 0;
        for(User *user : currentChannel->getUsers())
        {
            bool hasUserTimedOut = false;
            if(user->isOnlineUser())
            {
                auto onlineUser = static_cast<OnlineUser*>(user);
                i64 pingTimeDiffSec = timestampSec - (i64)onlineUser->pingTimestampSec;
                if(pingTimeDiffSec > USER_TIMEOUT_SEC)
                    hasUserTimedOut = true;
            }
            
            if(hasUserTimedOut)
                ++numOfflineUsers;
            else
                ++numOnlineUsers;
        }
        
        // TODO: Remove this shit
        sf::String str = "Online - ";
        str += to_string(numOnlineUsers);
        sf::Text text(str, *font, textHeight * 1.0f);
        text.setPosition(position);
        text.setFillColor(ColorScheme::getTextRegularColor() * sf::Color(255, 255, 255, 100));
        window.draw(text);
        position.y += floor(font->getLineSpacing(text.getCharacterSize()));
        position.y += PADDING_BOTTOM * Settings::getScaling() * 0.5f;
        
        sf::Shader *circleShader = ResourceCache::getShader("shaders/circleMask.glsl", sf::Shader::Fragment);
        
        for(User *user : currentChannel->getUsers())
        {
            bool isUserOnline = true;
            if(user->isOnlineUser())
            {
                auto onlineUser = static_cast<OnlineUser*>(user);
                i64 pingTimeDiffSec = timestampSec - (i64)onlineUser->pingTimestampSec;
                if(pingTimeDiffSec > USER_TIMEOUT_SEC)
                    isUserOnline = false;
            }
            
            if(isUserOnline)
                renderUser(cache, user, circleShader, window, position, font, textHeight, isUserOnline);
        }
        
        if(numOfflineUsers == 0) return;
        position.y += PADDING_BOTTOM * Settings::getScaling();
        
        // TODO: Remove this shit
        str = "Offline - ";
        str += to_string(numOfflineUsers);
        text.setString(str);
        text.setPosition(position);
        text.setFillColor(ColorScheme::getTextRegularColor() * sf::Color(255, 255, 255, 100));
        window.draw(text);
        position.y += floor(font->getLineSpacing(text.getCharacterSize()));
        position.y += PADDING_BOTTOM * Settings::getScaling() * 0.5f;
        
        for(User *user : currentChannel->getUsers())
        {
            bool isUserOnline = true;
            if(user->isOnlineUser()) 
            {
                auto onlineUser = static_cast<OnlineUser*>(user);
                i64 pingTimeDiffSec = timestampSec - (i64)onlineUser->pingTimestampSec;
                if(pingTimeDiffSec > USER_TIMEOUT_SEC)
                    isUserOnline = false;
            }
            
            if(!isUserOnline)
                renderUser(cache, user, circleShader, window, position, font, textHeight, isUserOnline);
        }
    }
    
    float UsersSidePanel::getWidth()
    {
        return floor(WIDTH * Settings::getScaling());
    }
}