/**
 * Copyright 2018 Red Hat Inc.
 *
 * Licensed 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 { List } from 'immutable';
import { chunk } from 'lodash';

// Partition a list into equal sized chunks, returning a List of Lists.  If we
// can't equally distribute the elements, the last List will contain fewer
// elements.  We also try to preserve any immutable.js data structures.
export const splitListIntoChunks = (list, chunkCount = 2) => {
  const chunkSize = Math.ceil(list.size / chunkCount);
  return List(chunk(list.toArray(), chunkSize).map(List));
};
