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
  );
}