#include "../../include/gui/Button.hpp"
#include "../../include/Theme.hpp"
#include "../../include/Config.hpp"
#include <mglpp/system/FloatRect.hpp>
#include <mglpp/window/Window.hpp>
#include <mglpp/window/Event.hpp>

namespace QuickMedia {
    static float floor(float v) {
        return (int)v;
    }
    
    static const float PADDING_Y = 5.0f;

    Button::Button(const std::string &label, mgl::Font *font, float width, mgl::Shader *rounded_rectangle_shader, float scale) :
        label(label, *font),
        background(mgl::vec2f(1.0f, 1.0f), 10.0f * get_config().scale, get_theme().shade_color, rounded_rectangle_shader),
        scale(scale)
    {
        background.set_size(mgl::vec2f(floor(width * scale), get_height()));
        set_position(mgl::vec2f(0.0f, 0.0f));
    }

    ButtonEvent Button::on_event(mgl::Event &event) {
        ButtonEvent performed_event = BUTTON_EVENT_NONE;
        if(event.type == mgl::Event::MouseMoved) {
            if(mgl::FloatRect(background.get_position(), background.get_size()).contains(mgl::vec2f(event.mouse_move.x, event.mouse_move.y))) {
                const int inc = 20;
                background.set_color(mgl::Color(
                    std::min(255, (int)background_color.r + inc),
                    std::min(255, (int)background_color.g + inc),
                    std::min(255, (int)background_color.b + inc)));
            } else {
                background.set_color(background_color);
            }
        } else if(event.type == mgl::Event::MouseButtonPressed) {
            if(event.mouse_button.button == mgl::Mouse::Left && mgl::FloatRect(background.get_position(), background.get_size()).contains(mgl::vec2f(event.mouse_button.x, event.mouse_button.y))) {
                clicked_inside = true;
            } else {
                clicked_inside = false;
            }
        } else if(event.type == mgl::Event::MouseButtonReleased) {
            if(clicked_inside && event.mouse_button.button == mgl::Mouse::Left && mgl::FloatRect(background.get_position(), background.get_size()).contains(mgl::vec2f(event.mouse_button.x, event.mouse_button.y))) {
                performed_event = BUTTON_EVENT_CLICKED;
            }
            clicked_inside = false;
        }
        return performed_event;
    }

    void Button::draw(mgl::Window &target) {
        background.draw(target);
        target.draw(label);
    }

    void Button::set_background_color(mgl::Color color) {
        background_color = color;
        background.set_color(background_color);
    }

    void Button::set_position(mgl::vec2f pos) {
        background.set_position(pos);

        const auto label_bounds = label.get_bounds();
        mgl::vec2f label_pos(pos + background.get_size() * 0.5f - label_bounds.size * 0.5f - mgl::vec2f(0.0f, 1.0f * scale));
        label_pos.x = floor(label_pos.x);
        label_pos.y = floor(label_pos.y);
        label.set_position(label_pos);
    }

    mgl::vec2f Button::get_position() const {
        return background.get_position();
    }

    float Button::get_width() const {
        return background.get_size().x;
    }

    float Button::get_height() {
        return floor((PADDING_Y * 2.0f) * scale + label.get_bounds().size.y);
    }
}