import { ValidationOptions } from '../ValidationOptions';
import { buildMessage, ValidateBy } from '../common/ValidateBy';

export const IS_FIREBASE_PUSH_ID = 'IsFirebasePushId';

/**
 * Checks if the string is a Firebase Push Id
 * If given value is not a Firebase Push Id, it returns false
 */
export function isFirebasePushId(value: unknown): boolean {
  const webSafeRegex = /^[a-zA-Z0-9_-]*$/;
  return typeof value === 'string' && value.length === 20 && webSafeRegex.test(value);
}

/**
 * Checks if the string is a Firebase Push Id
 * If given value is not a Firebase Push Id, it returns false
 */
export function IsFirebasePushId(validationOptions?: ValidationOptions): PropertyDecorator {
  return ValidateBy(
    {
      name: IS_FIREBASE_PUSH_ID,
      validator: {
        validate: (value, args): boolean => isFirebasePushId(value),
        defaultMessage: buildMessage(
          eachPrefix => eachPrefix + '$property must be a Firebase Push Id',
          validationOptions
        ),
      },
    },
    validationOptions
  );
}