#include <SFML/Window/Event.hpp>
#include <SFML/System/Time.hpp>
#include "application.h"

// Hardcoded for now
const sf::Time TIME_PER_SECOND = sf::seconds(1.f / 60.f);

Application::Application(unsigned int window_width, unsigned int window_height) :
    current_state(STATE::PLAY),
    render_window({window_width, window_height}, "Sliding Puzzle")
{}

bool Application::init(const std::string &path, int splitting)
{
    render_window.setFramerateLimit(60);
    return board.init(path, splitting, render_window);
}

void Application::run()
{
    // Main game cycle
    render_window.display();
    while (render_window.isOpen())
    {
        processInput();
        draw();
    }
}

void Application::draw()
{
    render_window.clear();
    board.draw(render_window);
    render_window.display();
}

void Application::processInput()
{
    sf::Event event;
    while (render_window.pollEvent(event))
    {        
        switch (current_state)
        {
        case STATE::PLAY:
            onGameState(event);
            break;

        case STATE::WIN:
            onWinState(event);
            break;
        }
    }
}

void Application::onGameState(sf::Event& event)
{
    switch (event.type)
    {
    case sf::Event::Closed:
        render_window.close();
        break;

    case sf::Event::KeyPressed:
        if (event.key.code == sf::Keyboard::Z)
            board.onSelectionMode();
        else
            board.tryProcessDirection(getDirection(event.key.code));
        break;

    default:
        break;
    }

    if (board.isWinCondition())
    {
        current_state = STATE::WIN;
        board.setCursorVisibility(false);
    }
}

void Application::onWinState(sf::Event& event)
{
    switch (event.type)
    {
    case sf::Event::Closed:
        render_window.close();
        break;

    case sf::Event::KeyPressed:
        if (event.key.code == sf::Keyboard::Z)
            render_window.close();
        break;

    default:
        break;
    }
}

DIRECTION Application::getDirection(sf::Keyboard::Key &key) const
{
    switch (key)
    {
    case sf::Keyboard::A:
    case sf::Keyboard::Left:
    case sf::Keyboard::Num4:
        return DIRECTION::LEFT;

    case sf::Keyboard::W:
    case sf::Keyboard::Up:
    case sf::Keyboard::Num8:
        return DIRECTION::UP;

    case sf::Keyboard::D:
    case sf::Keyboard::Right:
    case sf::Keyboard::Num6:
        return DIRECTION::RIGHT;

    case sf::Keyboard::S:
    case sf::Keyboard::Down:
    case sf::Keyboard::Num2:
        return DIRECTION::DOWN;

    default:
        return DIRECTION::NONE;
    }
}