#pragma once

#include <GLFW/glfw3.h>
#include <map>
#include <set>
#include "glm/vec2.hpp"

class Listener;

class MouseListener;

class Input {
	friend Listener;
	friend MouseListener;
public:
	explicit Input(GLFWwindow *window);
	static Input *instance;
	static std::map<int, bool> KeyIsDown;
	static std::map<int, bool> MouseButtonIsDown;
	glm::vec2 currentCursorPosition {};
private:
	GLFWwindow *window;
	std::set<Listener *> listeners;

	void keyPressed(int key);
	void keyReleased(int key);

	void mouseButtonPressed(int button);
	void mouseButtonReleased(int button);
	void mouseMoved(const glm::vec2 &newCursorPosition);
};

class Listener {
public:
	Listener();
	virtual ~Listener();
};

class KeyListener : Listener {

};

class MouseListener : public Listener {
public:
	virtual void mouseMoved(const glm::vec2 &delta) {};

	virtual void mouseButtonPressed(int button) {};

	virtual void mouseButtonReleased(int button) {};
};