/*
    * 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.
   */
  package org.apache.maven.plugin.surefire.booterclient.lazytestprovider;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  import java.util.concurrent.ConcurrentLinkedDeque;
  
  /**
   * A {@link org.apache.maven.surefire.shared.utils.cli.Commandline} implementation.
   *
   * @author Andreas Gudian
   */
  public class Commandline extends org.apache.maven.surefire.shared.utils.cli.Commandline {
      private final Collection<String> excludedEnvironmentVariables;
      private final Set<String> addedEnvironmentVariables;
  
      /**
       * for testing purposes only
       */
      public Commandline() {
          this(new String[0]);
      }
  
      public Commandline(String[] excludedEnvironmentVariables) {
          this.excludedEnvironmentVariables = new ConcurrentLinkedDeque<>();
          this.addedEnvironmentVariables = new HashSet<>();
          Collections.addAll(this.excludedEnvironmentVariables, excludedEnvironmentVariables);
      }
  
      @Override
      public void addEnvironment(String name, String value) {
          super.addEnvironment(name, value);
          addedEnvironmentVariables.add(name);
      }
  
      @Override
      public String[] getEnvironmentVariables() {
          String[] envs = super.getEnvironmentVariables();
          Set<String> result = new HashSet<>(Arrays.asList(envs));
          result.addAll(addedEnvironmentVariables);
          return excludedEnvironmentVariables.isEmpty()
                  ? result.toArray(new String[0])
                  : result.stream()
                          .filter(env -> {
                              String varName =
                                      env != null && env.contains("=") ? env.substring(0, env.indexOf('=')) : env;
                              return !excludedEnvironmentVariables.contains(varName);
                          })
                          .toArray(String[]::new);
      }
  }