const range = (start, end) => {
  return new Array(end - start).fill().map((d, i) => i + start);
};

export const disallowedCombinations = {
  '': [],
  alt: ['space'],
  shift: [],
  ctrl: [
    'f4',
    'f5',
    'f11',
    'w',
    'r',
    't',
    'o',
    'p',
    'a',
    'd',
    'f',
    'g',
    'h',
    'j',
    'l',
    'z',
    'x',
    'c',
    'v',
    'b',
    'n',
    'pagedown',
    'pageup',
  ],
  'ctrl+shift': ['q', 'w', 'r', 't', 'p', 'a', 'h', 'v', 'b', 'n'],
};

export const allowedKeys = [
  ...[8, 13, 27, 32, 46], // backspace, enter, escape, space, delete
  ...[12, 106, 107, 109, 110, 111], // Numpad keys
  ...range(218, 220), // [\]
  ...range(185, 190), // ;=,-./
  ...range(111, 131), // F1-F19
  ...range(32, 41), // arrow keys, home/end, pg dn/up
  ...range(47, 58), // 0-9
  ...range(64, 91), // A-Z
];

export const specialKeys = {
  8: 'backspace',
  9: 'tab',
  13: 'return',
  16: 'shift',
  17: 'ctrl',
  18: 'alt',
  19: 'pause',
  20: 'capslock',
  27: 'esc',
  32: 'space',
  33: 'pageup',
  34: 'pagedown',
  35: 'end',
  36: 'home',
  37: 'left',
  38: 'up',
  39: 'right',
  40: 'down',
  45: 'insert',
  46: 'del',
  96: '0',
  97: '1',
  98: '2',
  99: '3',
  100: '4',
  101: '5',
  102: '6',
  103: '7',
  104: '8',
  105: '9',
  106: '*',
  107: '+',
  109: '-',
  110: '.',
  111: '/',
  112: 'f1',
  113: 'f2',
  114: 'f3',
  115: 'f4',
  116: 'f5',
  117: 'f6',
  118: 'f7',
  119: 'f8',
  120: 'f9',
  121: 'f10',
  122: 'f11',
  123: 'f12',
  144: 'numlock',
  145: 'scroll',
  191: '/',
  224: 'meta',
};