/*!
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.
 */

export const median = (values: Array<number>): number => {
  if (values.length === 0) {
    return 0;
  }

  const sorted = [...values].sort((first, second) => first - second);
  const middle = Math.floor(sorted.length / 2);

  return sorted.length % 2 === 0
    ? ((sorted[middle - 1] ?? 0) + (sorted[middle] ?? 0)) / 2
    : (sorted[middle] ?? 0);
};
