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
    );
}