#include "applicationsfml.h"
#include "sfml/corefactorysfml.h"
#include "sfml/classicmode/classicfactorysfml.h"

#include <SFML/System/Clock.hpp>

const sf::Time TIME_PER_FRAME = sf::seconds(1.f / 90.f);

ApplicationSFML::ApplicationSFML(const std::shared_ptr<sf::RenderWindow>& render_window) :
    _render_window(render_window)
{
    _render_window->setFramerateLimit(60);
    _render_window->setKeyRepeatEnabled(false);
    _render_window->setMouseCursorGrabbed(false);
    _render_window->setVerticalSyncEnabled(true);

    _core_factory = std::make_shared<CoreFactorySFML>(_render_window);
    _game_factory = std::make_shared<ClassicFactorySFML>(_render_window);
}

void ApplicationSFML::display()
{
    _render_window->clear();

    for (const auto& state : _state_stack)
        state->display();

    _render_window->display();
}

void ApplicationSFML::run()
{
    sf::Clock timer;
    sf::Time time_since_last_update = sf::Time::Zero;

    while (_render_window->isOpen())
    {
        time_since_last_update += timer.restart();

        sf::Event event;
        while (_render_window->pollEvent(event))
        {
            switch(event.type)
            {
            case sf::Event::Closed:
                _render_window->close();
                break;

            default:
                Application::input(convert(event));
                break;
            }
        }

        bool isOneFramePassed = time_since_last_update >= TIME_PER_FRAME;
        if (isOneFramePassed)
        {
            time_since_last_update -= TIME_PER_FRAME;
            update(time_since_last_update.asMicroseconds());
            display();
        }
    }
}

kku::SystemEvent ApplicationSFML::convert(const sf::Event& event) const
{
    switch (event.type)
    {
    default:
        break;

    case sf::Event::Resized:
        return kku::SystemEvent
        {
            kku::SystemEvent::Type::Resize,
            kku::SystemEvent::Size
            {
                event.size.width,
                event.size.height
            }
        };

    case sf::Event::KeyPressed:
        return kku::SystemEvent
        {
            kku::SystemEvent::Type::KeyPress,
            kku::SystemEvent::Key
            {
                ' ', // converter
                event.key.alt,
                event.key.control,
                event.key.shift
            }
        };

    case sf::Event::KeyReleased:
        return kku::SystemEvent
        {
            kku::SystemEvent::Type::KeyRelease,
            kku::SystemEvent::Key
            {
                ' ', // converter
                event.key.alt,
                event.key.control,
                event.key.shift
            }
        };

    case sf::Event::MouseWheelScrolled:
        return kku::SystemEvent
        {
            kku::SystemEvent::Type::MouseWheelScroll,
            kku::SystemEvent::Mouse
            {
                kku::Point
                {
                    event.mouseWheelScroll.x,
                    event.mouseWheelScroll.y
                },

                (event.mouseWheelScroll.delta > 0),
                kku::SystemEvent::Mouse::Button::Wheel
            }
        };
    
    case sf::Event::MouseMoved:
        return kku::SystemEvent
        {
            kku::SystemEvent::Type::MouseMove,
            kku::SystemEvent::Mouse
            {
                kku::Point
                {
                    event.mouseMove.x,
                    event.mouseMove.y
                },

                false,
                kku::SystemEvent::Mouse::Button::None
            }
        };

    case sf::Event::MouseButtonPressed:
        return kku::SystemEvent
        {
            kku::SystemEvent::Type::MousePress,
            kku::SystemEvent::Mouse
            {
                kku::Point
                {
                    event.mouseButton.x,
                    event.mouseButton.y
                },

                false,
                ((event.mouseButton.button == sf::Mouse::Button::Left)
                 ? kku::SystemEvent::Mouse::Button::Left
                 : kku::SystemEvent::Mouse::Button::Right)
            }
        };

    case sf::Event::MouseButtonReleased:
        return kku::SystemEvent
        {
            kku::SystemEvent::Type::MouseRelease,
            kku::SystemEvent::Mouse
            {
                kku::Point
                {
                    event.mouseButton.x,
                    event.mouseButton.y
                },

                false,
                ((event.mouseButton.button == sf::Mouse::Button::Left)
                 ? kku::SystemEvent::Mouse::Button::Left
                 : kku::SystemEvent::Mouse::Button::Right)
            }
        };
    }

    return kku::SystemEvent
    {
        kku::SystemEvent::Type::None,
        kku::SystemEvent::None{}
    };
}