import { ValidationOptions } from "../ValidationOptions";
import { buildMessage, ValidateBy } from "../common/ValidateBy";
import ValidatorJS from "validator";

export const IS_HASH = "isHash";

/**
 * Check if the string is a hash of type algorithm.
 * Algorithm is one of ['md4', 'md5', 'sha1', 'sha256', 'sha384', 'sha512', 'ripemd128', 'ripemd160', 'tiger128',
 * 'tiger160', 'tiger192', 'crc32', 'crc32b']
 */
export function isHash(value: unknown, algorithm: ValidatorJS.HashAlgorithm): boolean {
    return typeof value === "string" && ValidatorJS.isHash(value, algorithm);
}

/**
 * Check if the string is a hash of type algorithm.
 * Algorithm is one of ['md4', 'md5', 'sha1', 'sha256', 'sha384', 'sha512', 'ripemd128', 'ripemd160', 'tiger128',
 * 'tiger160', 'tiger192', 'crc32', 'crc32b']
 */
export function IsHash(algorithm: string, validationOptions?: ValidationOptions): PropertyDecorator {
    return ValidateBy(
        {
            name: IS_HASH,
            constraints: [algorithm],
            validator: {
                validate: (value, args): boolean => isHash(value, args.constraints[0]),
                defaultMessage: buildMessage(
                    (eachPrefix) => eachPrefix + "$property must be a hash of type $constraint1",
                    validationOptions
                )
            }
        },
        validationOptions
    );
}