#include <stdio.h>
#include <mglpp/mglpp.hpp>
#include <mglpp/window/Window.hpp>
#include <mglpp/window/Event.hpp>
#include <mglpp/graphics/Texture.hpp>
#include <mglpp/graphics/Sprite.hpp>
#include <mglpp/graphics/Font.hpp>
#include <mglpp/graphics/Text.hpp>
#include <mglpp/graphics/Rectangle.hpp>
#include <mglpp/graphics/VertexBuffer.hpp>
#include <mglpp/graphics/Vertex.hpp>
#include <mglpp/graphics/Shader.hpp>
#include <mglpp/system/Clock.hpp>

struct Delegate {
    Delegate() {}

    void draw() {
        mgl::Rectangle rect(window->get_cursor_position().to_vec2f(), { 100.0f, 500.0f });
        rect.set_color({255, 0, 0, 255});
        window->draw(rect);

        shader_program->set_uniform("resolution", mgl::vec2f(window->get_size().x, window->get_size().y));

        mgl::Sprite sprite(texture, { 100.0f - 10.0f, 0.0f });
        sprite.set_color({255, 255, 255, 128});
        window->draw(sprite, shader_program);

        mgl::Text text("hello world!\nelapsed time: " + std::to_string(clock.get_elapsed_time_seconds()), { 0.0f, 0.0f }, *font);
        window->draw(text);

        vertex_buffer->set_position({ window->get_cursor_position().x + 100, window->get_cursor_position().y });
        window->draw(*vertex_buffer);
    }

    mgl::Window *window;
    mgl::Texture *texture;
    mgl::Font *font;
    mgl::VertexBuffer *vertex_buffer;
    mgl::Shader *shader_program;
    mgl::Clock clock;
};

int main(int argc, char **argv) {
    mgl::Init init;

    mgl::Window window;
    if(!window.create("mglpp", 1920, 1080))
        return 1;

    mgl::Texture texture;
    if(!texture.load_from_file("depends/mgl/tests/X11.png"))
        return 1;

    mgl::Font font;
    if(!font.load_from_file("/usr/share/fonts/noto/NotoSans-Regular.ttf", 32))
        return 1;

    mgl::Shader shader;
    if(!shader.load_from_file("depends/mgl/tests/circle_mask.glsl", mgl::Shader::Fragment))
        return 1;

    mgl::Texture font_texture = font.get_texture();
    mgl::Vertex vertices[4] = {
        {
            {0.0f, 0.0f},
            {0.0f, 0.0f},
            {255, 0, 0, 100}
        },
        {
            {font_texture.get_size().x, 0.0f},
            {1.0f, 0.0f},
            {0, 255, 0, 100}
        },
        {
            {font_texture.get_size().x, font_texture.get_size().y},
            {1.0f, 1.0f},
            {0, 0, 255, 100}
        },
        {
            {0.0f, font_texture.get_size().y},
            {0.0f, 1.0f},
            {255, 0, 255, 100},
        }
    };

    mgl::VertexBuffer vertex_buffer;
    if(!vertex_buffer.update(vertices, 4, mgl::PrimitiveType::Quads, mgl::VertexBuffer::Static))
        return 1;

    vertex_buffer.set_texture(&font_texture);

    Delegate delegate;
    delegate.window = &window;
    delegate.texture = &texture;
    delegate.font = &font;
    delegate.vertex_buffer = &vertex_buffer;
    delegate.shader_program = &shader;

    mgl::Event event;
    while(true) {
        if(window.poll_event(event)) {

        }

        window.clear(mgl::Color(0, 0, 0, 255));
        delegate.draw();
        window.display();
    }

    return 0;
}