#include "application.h"
#include <SFML/Graphics/Color.hpp>
#include <SFML/Window/Event.hpp>
#include <SFML/Window/Keyboard.hpp>

const sf::Time TIME_PER_FRAME = sf::seconds(1.f / 60.f);

Application::Application() :
    game_window({1280, 720}, "Test")
{
    float x = game_window.getSize().x;
    float y = game_window.getSize().y;
    pulse_mask.setSize({x, y});
    pulse_mask.setOrigin(0.f, 0.f);
    pulse_mask.setFillColor(sf::Color(255, 0, 0, 0));
    pulse_mask_green.setSize({x, y});
    pulse_mask_green.setOrigin(0.f, 0.f);
    pulse_mask_green.setFillColor(sf::Color(0, 255, 0, 0));
    font.loadFromFile("VeraMono.ttf");
    font2.loadFromFile("VeraMono.ttf");
    text.setFont(font);
    text.setPosition(60, 60);
    text.setFillColor(sf::Color(255, 255, 255));
    text.setCharacterSize(25);

    grade.setFont(font2);
    grade.setPosition(100, 100);
    grade.setFillColor(sf::Color(255, 255, 255, 0));
    grade.setCharacterSize(35);
}

void Application::run()
{
    game_window.display();
    sf::Int64 iter = 9000 + (1412162 * 25);
    while (iter > 9000)
    {
        Note note(iter, iter + 412162);
        timeline.push(note);
        iter -= 1412162;
    }

    sf::Clock timer;
    sf::Time time_since_last_update = sf::Time::Zero;
    music.openFromFile("/home/naiji/METEOR.flac");
    music.play();
    while (game_window.isOpen())
    {
        sf::Event event;
        while (game_window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                game_window.close();

            if (event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Z && !timeline.empty())
            {
                const auto current_note = timeline.top();
                const auto grade_result = current_note.onTap(Note::Arrow::UP, music.getPlayingOffset().asMicroseconds());
                pulse_mask.setFillColor(sf::Color(255, 0, 0, 255));
                switch (grade_result.rating)
                {
                    case (NoteGrade::Rating::BAD):
                        grade.setString("BAD");
                        grade.setFillColor(sf::Color(255, 255, 255, 255));
                    break;

                    case (NoteGrade::Rating::GREAT):
                        grade.setString("GREAT");
                        grade.setFillColor(sf::Color(255, 255, 0, 255));
                    break;
                }

            }

        }

        time_since_last_update += timer.restart();
        if (time_since_last_update >= TIME_PER_FRAME)
        {
            time_since_last_update -= TIME_PER_FRAME;
            update();
            draw();
        }
    }
}

void Application::update()
{
    if (!timeline.empty() && timeline.top().deathOffset() <= music.getPlayingOffset().asMicroseconds())
    {
        timeline.pop();
        pulse_mask_green.setFillColor(sf::Color(0, 255, 0, 255));
    }

    text.setString(std::to_string(music.getPlayingOffset().asSeconds()));

    if (pulse_mask.getFillColor().a > 0)
    {
        const auto alpha = pulse_mask.getFillColor().a - 25;
        pulse_mask.setFillColor(sf::Color(255, 0, 0, alpha < 0 ? 0 : alpha));
    }

    if (pulse_mask_green.getFillColor().a > 0)
    {
        const auto alpha = pulse_mask_green.getFillColor().a - 25;
        pulse_mask_green.setFillColor(sf::Color(0, 255, 0, alpha < 0 ? 0 : alpha));
    }

    if (grade.getFillColor().a > 0)
    {
        const auto alpha = grade.getFillColor().a - 20;
        grade.setFillColor(sf::Color(255, 255, 255, alpha < 0 ? 0 : alpha));
    }

}

void Application::draw()
{
    game_window.clear();
    game_window.draw(pulse_mask);
    game_window.draw(pulse_mask_green);
    game_window.draw(text);
    game_window.draw(grade);
    game_window.display();
}