/* @flow */

const dv = (t: number) => {
  var m = 0,
    s = 1;
  for (; t; t = Math.floor(t / 10)) {
    s = (s + t % 10 * (9 - m++ % 6)) % 11;
  }
  return s ? (s - 1).toString() : 'k';
};

const checkRut = (rutWithDv: string) => {
  if (!/^[0-9]+[-|‐]{1}[0-9kK]{1}$/.test(rutWithDv)) return false;
  var tmp = rutWithDv.split('-');
  var digv = tmp[1];
  var rut = tmp[0];
  if (digv == 'K') digv = 'k';
  return dv(parseInt(rut)) === digv;
};

export { checkRut };