#pragma once
#include "InputListener.h"
#include <unordered_set>
#include "Point.h"

class InputSystem
{
public:
    InputSystem();
    ~InputSystem();

    void update();
    void addListener(InputListener* listener);
    void removeListener(InputListener* listener);

public:
    static InputSystem* get();

private:
    std::unordered_set<InputListener*> m_set_listeners;
    unsigned char m_keys_state[256] = {};
    unsigned char m_old_keys_state[256] = {};
    Point m_old_mouse_pos;
    bool m_first_time = true;
};