/*
 * 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 { get } from 'lodash';
import * as literal from '../node_types/literal';

export function buildNodeParams(fieldName) {
  return {
    arguments: [literal.buildNode(fieldName)],
  };
}

export function toElasticsearchQuery(node, indexPattern) {
  const { arguments: [ fieldNameArg ] } = node;
  const fieldName = literal.toElasticsearchQuery(fieldNameArg);
  const field = get(indexPattern, 'fields', []).find(field => field.name === fieldName);

  if (field && field.scripted) {
    throw new Error(`Exists query does not support scripted fields`);
  }
  return {
    exists: { field: fieldName }
  };
}
