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

#include <vector>
#include <cmath>

using namespace sf;

int main()
{
	RenderWindow window{{1024, 768}, ""};
	View view{{0, 0, 1024, 768}};

	std::vector<RectangleShape> rects;

	while (window.isOpen())
	{

		Event event;
		while (window.pollEvent(event))
		{
			switch (event.type)
			{
				case Event::Closed:
					window.close();
					break;

				case Event::Resized:
				{
					float width = static_cast<float>(event.size.width);
					float height = static_cast<float>(event.size.height);

					view.reset({0.0f, 0.0f, width, height});

					break;
				}

				default:
					break;
			}
		}

		Vector2f offset;
		if (Keyboard::isKeyPressed(Keyboard::Left))
		{
			offset.x += -2.0f;
		}
		if (Keyboard::isKeyPressed(Keyboard::Right))
		{
			offset.x += 2.0f;
		}
		if (Keyboard::isKeyPressed(Keyboard::Down))
		{
			offset.y += 2.0f;
		}
		if (Keyboard::isKeyPressed(Keyboard::Up))
		{
			offset.y += -2.0f;
		}
		view.move(offset);

		if (Mouse::isButtonPressed(Mouse::Left))
		{
			auto pixelPos = Mouse::getPosition(window);
			auto coordPos = window.mapPixelToCoords(pixelPos);

			int x = static_cast<int>(std::trunc(coordPos.x));
			int y = static_cast<int>(std::trunc(coordPos.y));

			x -= x % 48;
			y -= y % 48;

			coordPos.x = static_cast<float>(x);
			coordPos.y = static_cast<float>(y);

			RectangleShape rect{{48.0f, 48.0f}};
			rect.setPosition(coordPos);
			rects.push_back(std::move(rect));
		}

		window.clear();
		window.setView(view);
		for (const auto &it: rects) window.draw(it);
		window.display();
	}

	return 0;
}