/*
    * 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.eclipse.aether.transport.jdk;
  
  import java.net.InetAddress;
  import java.net.UnknownHostException;
  import java.net.http.HttpClient;
  
  import org.eclipse.aether.ConfigurationProperties;
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.repository.RemoteRepository;
  import org.eclipse.aether.util.ConfigUtils;
  
  /**
   * JDK Transport customizer.
   *
   * @since TBD
   */
  final class JdkHttpTransporterCustomizer {
      private JdkHttpTransporterCustomizer() {}
  
      static void customizeBuilder(
              RepositorySystemSession session, RemoteRepository repository, HttpClient.Builder builder) {
          InetAddress localAddress = getHttpLocalAddress(session, repository);
          if (localAddress != null) {
              builder.localAddress(localAddress);
          }
      }
  
      static void customizeHttpClient(RepositorySystemSession session, RemoteRepository repository, HttpClient client) {}
  
      /**
       * Returns non-null {@link InetAddress} if set in configuration, {@code null} otherwise.
       */
      private static InetAddress getHttpLocalAddress(RepositorySystemSession session, RemoteRepository repository) {
          String bindAddress = ConfigUtils.getString(
                  session,
                  null,
                  ConfigurationProperties.HTTP_LOCAL_ADDRESS + "." + repository.getId(),
                  ConfigurationProperties.HTTP_LOCAL_ADDRESS);
          if (bindAddress == null) {
              return null;
          }
          try {
              return InetAddress.getByName(bindAddress);
          } catch (UnknownHostException uhe) {
              throw new IllegalArgumentException(
                      "Given bind address (" + bindAddress + ") cannot be resolved for remote repository " + repository,
                      uhe);
          }
      }
  }