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

export const IS_IN = "isIn";

/**
 * Checks if given value is in a array of allowed values.
 */
export function isIn(value: unknown, possibleValues: readonly unknown[]): boolean {
    return !(possibleValues instanceof Array) || possibleValues.some(possibleValue => possibleValue === value);
}

/**
 * Checks if given value is in a array of allowed values.
 */
export function IsIn(values: readonly any[], validationOptions?: ValidationOptions): PropertyDecorator {
    return ValidateBy(
        {
            name: IS_IN,
            constraints: [values],
            validator: {
                validate: (value, args): boolean => isIn(value, args.constraints[0]),
                defaultMessage: buildMessage(
                    (eachPrefix) => eachPrefix + "$property must be one of the following values: $constraint1",
                    validationOptions
                )
            }
        },
        validationOptions
    );
}