/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import { includes } from 'lodash';

export function Arg(config) {
  if (config.name === '_') throw Error('Arg names must not be _. Use it in aliases instead.');
  this.name = config.name;
  this.required = config.required || false;
  this.help = config.help || '';
  this.types = config.types || [];
  this.default = config.default;
  this.aliases = config.aliases || [];
  this.multi = config.multi == null ? false : config.multi;
  this.resolve = config.resolve == null ? true : config.resolve;
  this.options = config.options || [];
  this.accepts = type => {
    if (!this.types.length) return true;
    return includes(config.types, type);
  };
}