export { keyCode, toKey, toKeyCode, keys };

const ignorables = {
  Alt: 18,
  AltGraph: 18,
  ArrowDown: 40,
  ArrowLeft: 37,
  ArrowRight: 39,
  ArrowUp: 38,
  Backspace: 8,
  CapsLock: 20,
  Control: 17,
  ContextMenu: 93,
  Dead: 221,
  Delete: 46,
  End: 35,
  Escape: 27,
  F1: 112,
  F2: 113,
  F3: 114,
  F4: 115,
  F5: 116,
  F6: 117,
  F7: 118,
  F8: 119,
  F9: 120,
  F10: 121,
  F11: 122,
  F12: 123,
  Home: 36,
  Insert: 45,
  NumLock: 144,
  PageDown: 34,
  PageUp: 33,
  Pause: 19,
  PrintScreen: 44,
  Process: 229,
  Shift: 16,
  ScrollLock: 145,
  Tab: 9,
  Unidentified: 229
};

var keyCode = {
  c: 67,
  x: 88,
  z: 90,
  BACKSPACE_SAFARI: 127,
  Enter: 13,
  Meta_LEFT: 91,
  Meta_RIGHT: 92,
  Space: 32,
  ...ignorables
};

const keyCodeRev = Object.entries(keyCode).reduce(
    (acc, [key, value]) =>
      (
        // eslint-disable-next-line no-sequences
        (acc[value] = acc[value] === undefined ? key : acc[value]), acc
      ),
    {}
  ),
  keys = Object.entries(keyCode).reduce(
    // eslint-disable-next-line no-sequences
    (acc, [key, value]) => ((acc[key] = key === "Space" ? " " : key), acc),
    {}
  );

function toKey(keyCode, shiftKey) {
  return (
    keyCodeRev[keyCode] ||
    (shiftKey
      ? String.fromCharCode(keyCode)
      : String.fromCharCode(keyCode).toLowerCase())
  );
}

function toKeyCode(key) {
  return keyCode[key];
}