#pragma once

#include <memory>
#include <forward_list>

#include "Artist.h"
#include "CollisionChecker.h"
#include "Rectangle.h"

class QuadTreeCollisionChecker : public CollisionChecker {
public:
	QuadTreeCollisionChecker(Museum &);
	virtual void check();

public:
	const Rectangle & get_boundary() { return this->boundary; }
	std::unique_ptr<QuadTreeCollisionChecker> subtree[4] = {
		nullptr,
		nullptr,
		nullptr,
		nullptr,
	};

private:
	QuadTreeCollisionChecker(const QuadTreeCollisionChecker *, const Rectangle & boundary);

	const int capacity = 4;

	std::forward_list<Artist *> artists;
	size_t artists_size = 0;

	Rectangle boundary;

	void subdivide();
	void cull();
};