#pragma once

#include <functional>

enum MouseButton
{
    Left = 0,
    Right = 1
};

enum Key
{
    A = 0,
    B = 1,
    C = 2,
    D = 3,
    E = 4,
    F = 5,
    G = 6,
    H = 7,
    I = 8,
    J = 9,
    K = 10,
    L = 11,
    M = 12,
    N = 13,
    O = 14,
    P = 15,
    Q = 16,
    R = 17,
    S = 18,
    T = 19,
    U = 20,
    V = 21,
    W = 22,
    X = 23,
    Y = 24,
    Z = 25,
    Tab = 26,
    LeftArrow = 27,
    RightArrow = 28,
    UpArrow = 29,
    DownArrow = 30,
    PageUp = 31,
    PageDown = 32,
    Home = 33,
    End = 34,
    Delete = 35,
    Backspace = 36,
    Enter = 37,
    Escape = 38,
    LeftControl = 39,
    RightControl = 40,
    LeftShift = 41,
    RightShift = 42,
    LeftAlt = 43,
    RightAlt = 44,
    LeftSuper = 45,
    RightSuper = 46
};

enum KeyState
{
    Release = 0,
    Press = 1,
    Repeat = 2
};

class Input
{
public:
    static void NewFrame(); //needed for some input like scrolling

    static bool IsMouseDown(int button);
    static bool IsMouseClicked(int button);

    static void GetMousePosition(double& x, double& y);

    static float GetScrollDelta();

    static bool IsKeyDown(int key);
    static bool IsKeyPressed(int key);

    static void FeedMouseState(int button, int state);
    static void FeedMousePosition(float x, float y);
    static void FeedKeyState(int key, int state);
    static void FeedScroll(double y);
    static void FeedChar(unsigned int c);

    static std::function<void(int, int)> mouseButtonCallback;
    static std::function<void(int, int)> keyButtonCallback;
    static std::function<void(unsigned int)> charCallback;

private:
    static int m_mouseState[2];
    static int m_lastMouseState[2];

    static double m_mouseX;
    static double m_mouseY;

    static double m_currentScroll;

    static int m_keyState[26];
};