interface VerificationCodeGeneratorOption {
  type: 'number' | 'string';
}

export function generateVerificationCode(
  length: number,
  options: VerificationCodeGeneratorOption,
) {
  if (isNaN(length)) {
    throw new TypeError('Length must be a number');
  }
  if (length < 1) {
    throw new RangeError('Length must be at least 1');
  }
  const possible = '0123456789';
  let code = '';
  for (let i = 0; i < length; i++) {
    code += possible.charAt(Math.floor(Math.random() * possible.length));
  }

  if (options) {
    if (options.type === 'number') {
      return parseFloat(code);
    }
  }

  return code;
}