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

export const IS_ISO8601 = "isIso8601";

/**
 * Checks if the string is a valid ISO 8601 date.
 * If given value is not a string, then it returns false.
 * Use the option strict = true for additional checks for a valid date, e.g. invalidates dates like 2019-02-29.
 */
export function isISO8601(value: unknown, options?: ValidatorJS.IsISO8601Options): boolean {
    return typeof value === "string" && ValidatorJS.isISO8601(value, options);
}

/**
 * Checks if the string is a valid ISO 8601 date.
 * If given value is not a string, then it returns false.
 * Use the option strict = true for additional checks for a valid date, e.g. invalidates dates like 2019-02-29.
 */
export function IsISO8601(options?: ValidatorJS.IsISO8601Options, validationOptions?: ValidationOptions): PropertyDecorator {
    return ValidateBy(
        {
            name: IS_ISO8601,
            constraints: [options],
            validator: {
                validate: (value, args): boolean => isISO8601(value, args.constraints[0]),
                defaultMessage: buildMessage(
                    (eachPrefix) => eachPrefix + "$property must be a valid ISO 8601 date string",
                    validationOptions
                )
            }
        },
        validationOptions
    );
}