#include<chrono>

#include<SFML/Window.hpp>
#include<SFML/Graphics.hpp>

#include"Render.h"

int main()
{
	float width, height;
	float fov;
	std::cout << "Enter window width and height.\n";
	std::cin >> width >> height;
	std::cout << "Enter Field of View.\n";
	std::cin >> fov;
	std::cout << "Loading...\n";

	sf::RenderWindow window(sf::VideoMode(width, height), "C++ CPU Renderer", sf::Style::Titlebar | sf::Style::Close);
	sf::Event event;

	window.setFramerateLimit(60);

	sf::Texture texture;
	texture.create(width, height);

	sf::Sprite sprite(texture);

	sf::Clock clock;
	sf::Time time;

	Render render(width, height);	

	sf::Image image;
	image.loadFromFile("rusImage.png");
	Bitmap map(image.getSize().x, image.getSize().y);
	const sf::Uint8* pp = image.getPixelsPtr();
	for (int i = 0; i < image.getSize().x * image.getSize().y * 4; i += 4) {
		map.pixels[i + 0] = (unsigned char)pp[i + 0];
		map.pixels[i + 1] = (unsigned char)pp[i + 1];
		map.pixels[i + 2] = (unsigned char)pp[i + 2];
		map.pixels[i + 3] = (unsigned char)pp[i + 3];
	}

	std::chrono::high_resolution_clock::time_point time1 = std::chrono::high_resolution_clock::now();
	ObjModel vehicle("rus3.obj");
	std::chrono::high_resolution_clock::time_point time2 = std::chrono::high_resolution_clock::now();
	std::chrono::duration<double> speed = std::chrono::duration_cast<std::chrono::duration<double>>(time2 - time1);
	std::cout << "Model loading time: " << speed.count() << "s\n";
	std::cout << "Vertice count: " << vehicle.vertices.size() << "\nNumber of normals: " << vehicle.normals.size() << "\nUV count: " << vehicle.uvcoo.size() << "\n";
	std::cout << "Number of faces: " << vehicle.faces.size() << "\n";

	while (window.isOpen())
	{
		while (window.pollEvent(event))
			if (event.type == sf::Event::Closed)
				window.close();

		time = clock.getElapsedTime();

		Vertice a1, b1, c1, d1, e1, f1;

		Matrix4f move = Matrix4f::move(0.0f, -150.0f, 600.0f);
		Matrix4f rotate = Matrix4f::rotate(0.0f, time.asSeconds() * 25.0f, 0.0f);
		Matrix4f scale = Matrix4f::scale(1.0f, 1.0f, 1.0f);
		Matrix4f project = Matrix4f::perspective(1.0f, 10000.0f, fov, width / height);
		Matrix4f end_matrix = project * move * rotate * scale;
	
		ObjModel vehicle2 = vehicle.multiplyMatrix(end_matrix);
		vehicle2.divideW();
		vehicle2.screenspace(width, height);
		

		render.fill(255, 255, 255);
		render.resetZBuf();
		render.renderModel(vehicle2, map);
		
		texture.update((sf::Uint8*)render.pixels);
		window.draw(sprite);
		window.display();
	}

	return 0;
}