#ifndef GAME_KEYBOARD_H
#define GAME_KEYBOARD_H

#include <SDL.h>

#define KEY_MAX 256

enum {
    KeyUnknown = 0x00,
    KeyEscape = 0x01,
    Key1 = 0x02,
    Key2 = 0x03,
    Key3 = 0x04,
    Key4 = 0x05,
    Key5 = 0x06,
    Key6 = 0x07,
    Key7 = 0x08,
    Key8 = 0x09,
    Key9 = 0x0a,
    Key0 = 0x0b,
    KeyMinus = 0x0c,
    KeyEqual = 0x0d,
    KeyBackspace = 0x0e,
    KeyTab = 0x0f,
    KeyQ = 0x10,
    KeyW = 0x11,
    KeyE = 0x12,
    KeyR = 0x13,
    KeyT = 0x14,
    KeyY = 0x15,
    KeyU = 0x16,
    KeyI = 0x17,
    KeyO = 0x18,
    KeyP = 0x19,
    KeyBracketLeft = 0x1a,
    KeyBracketRight = 0x1b,
    KeyEnter = 0x1c,
    KeyLeftCtrl = 0x1d,
    KeyA = 0x1e,
    KeyS = 0x1f,
    KeyD = 0x20,
    KeyF = 0x21,
    KeyG = 0x22,
    KeyH = 0x23,
    KeyJ = 0x24,
    KeyK = 0x25,
    KeyL = 0x26,
    KeySemicolon = 0x27,
    KeyApostrophe = 0x28,
    KeyBacktick = 0x29,
    KeyLeftShift = 0x2a,
    KeyBackslash = 0x2b,
    KeyZ = 0x2c,
    KeyX = 0x2d,
    KeyC = 0x2e,
    KeyV = 0x2f,
    KeyB = 0x30,
    KeyN = 0x31,
    KeyM = 0x32,
    KeyComma = 0x33,
    KeyPeriod = 0x34,
    KeySlash = 0x35,
    KeyRightShift = 0x36,
    KeyKeypadMultiply = 0x37,
    KeyLeftAlt = 0x38,
    KeySpace = 0x39,
    KeyCapsLock = 0x3a,
    KeyF1 = 0x3b,
    KeyF2 = 0x3c,
    KeyF3 = 0x3d,
    KeyF4 = 0x3e,
    KeyF5 = 0x3f,
    KeyF6 = 0x40,
    KeyF7 = 0x41,
    KeyF8 = 0x42,
    KeyF9 = 0x43,
    KeyF10 = 0x44,
    KeyNumLock = 0x45,
    KeyScrollLock = 0x46,
    KeyKeypad7 = 0x47,
    KeyKeypad8 = 0x48,
    KeyKeypad9 = 0x49,
    KeyKeypadMinus = 0x4a,
    KeyKeypad4 = 0x4b,
    KeyKeypad5 = 0x4c,
    KeyKeypad6 = 0x4d,
    KeyKeypadPlus = 0x4e,
    KeyKeypad1 = 0x4f,
    KeyKeypad2 = 0x50,
    KeyKeypad3 = 0x51,
    KeyKeypad0 = 0x52,
    KeyKeypadPeriod = 0x53,
    KeyF11 = 0x57,
    KeyF12 = 0x58,
    KeyMediaPrev = 0x90,
    KeyMediaNext = 0x99,
    KeyKeypadEnter = 0x9c,
    KeyRightControl = 0x9d,
    KeyMediaMute = 0xa0,
    KeyMediaCalculator = 0xa1,
    KeyMediaPlay = 0xa2,
    KeyMediaStop = 0xa4,
    KeyMediaVolumeDown = 0xae,
    KeyMediaVolumeUp = 0xb0,
    KeyMediaWww = 0xb2,
    KeyKeypadDivide = 0xb5,
    KeyRightAlt = 0xb8,
    KeyHome = 0xc7,
    KeyUp = 0xc8,
    KeyPageUp = 0xc9,
    KeyLeft = 0xcb,
    KeyRight = 0xcd,
    KeyEnd = 0xcf,
    KeyDown = 0xd0,
    KeyPageDown = 0xd1,
    KeyInsert = 0xd2,
    KeyDelete = 0xd3,
    KeyLeftGui = 0xdb,
    KeyRightGui = 0xdc,
    KeyApps = 0xdd,
    KeyAcpiPower = 0xde,
    KeyAcpiSleep = 0xdf,
    KeyAcpiWake = 0xe3,
    KeyMediaWwwSearch = 0xe5,
    KeyMediaWwwFavorites = 0xe6,
    KeyMediaWwwRefresh = 0xe7,
    KeyMediaWwwStop = 0xe8,
    KeyMediaWwwForward = 0xe9,
    KeyMediaWwwBack = 0xea,
    KeyMediaMyComputer = 0xeb,
    KeyMediaEmail = 0xec,
    KeyMediaSelect = 0xed,
    KeyPrint = 0xfe,
    KeyPause = 0xff,
};

class Keyboard {
public:
    using KeyHandleFunction = void (*)(unsigned char);

    Keyboard();
    ~Keyboard();

    KeyHandleFunction setKeyUpHandler(KeyHandleFunction handler);
    KeyHandleFunction setKeyDownHandler(KeyHandleFunction handler);
    KeyHandleFunction setKeyRepeatHandler(KeyHandleFunction handler);

    bool keyState[KEY_MAX]{};

    const char *getKeyName(unsigned char keyCode);
private:
    friend class Events;

    friend void keyboardIsr();
    void Isr();
    enum State {
        Start,
        Extended,
        PauseBegin,
        PausePressed1,
        PauseReleased1,
        PrintPressed1,
        PrintPressed2,
        PrintReleased1,
        PrintReleased2,
    };
    State _state;
    KeyHandleFunction _keyDownHandler{nullptr}, _keyUpHandler{nullptr}, _keyRepeatHandler{nullptr};

    void keyDown(SDL_Keycode c);

    void keyUp(SDL_Keycode c);

};

extern Keyboard keyboard;

#endif //GAME_KEYBOARD_H