/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.hc.client5.http.impl.nio;
  
  import java.net.InetAddress;
  import java.net.InetSocketAddress;
  import java.net.SocketAddress;
  import java.util.concurrent.Future;
  
  import org.apache.hc.client5.http.DnsResolver;
  import org.apache.hc.client5.http.SchemePortResolver;
  import org.apache.hc.client5.http.impl.DefaultSchemePortResolver;
  import org.apache.hc.client5.http.nio.AsyncClientConnectionOperator;
  import org.apache.hc.client5.http.nio.ManagedAsyncClientConnection;
  import org.apache.hc.client5.http.routing.RoutingSupport;
  import org.apache.hc.core5.concurrent.ComplexFuture;
  import org.apache.hc.core5.concurrent.FutureCallback;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.config.Lookup;
  import org.apache.hc.core5.http.nio.ssl.TlsStrategy;
  import org.apache.hc.core5.reactor.ConnectionInitiator;
  import org.apache.hc.core5.reactor.IOSession;
  import org.apache.hc.core5.util.Args;
  import org.apache.hc.core5.util.Timeout;
  
  final class DefaultAsyncClientConnectionOperator implements AsyncClientConnectionOperator {
  
      private final SchemePortResolver schemePortResolver;
      private final MultihomeIOSessionRequester sessionRequester;
      private final Lookup<TlsStrategy> tlsStrategyLookup;
  
      DefaultAsyncClientConnectionOperator(
              final Lookup<TlsStrategy> tlsStrategyLookup,
              final SchemePortResolver schemePortResolver,
              final DnsResolver dnsResolver) {
          this.tlsStrategyLookup = Args.notNull(tlsStrategyLookup, "TLS strategy lookup");
          this.schemePortResolver = schemePortResolver != null ? schemePortResolver : DefaultSchemePortResolver.INSTANCE;
          this.sessionRequester = new MultihomeIOSessionRequester(dnsResolver);
      }
  
      @Override
      public Future<ManagedAsyncClientConnection> connect(
              final ConnectionInitiator connectionInitiator,
              final HttpHost host,
              final SocketAddress localAddress,
              final Timeout connectTimeout,
              final Object attachment,
              final FutureCallback<ManagedAsyncClientConnection> callback) {
          Args.notNull(connectionInitiator, "Connection initiator");
          Args.notNull(host, "Host");
          final ComplexFuture<ManagedAsyncClientConnection> future = new ComplexFuture<>(callback);
          final HttpHost remoteEndpoint = RoutingSupport.normalize(host, schemePortResolver);
          final InetAddress remoteAddress = host.getAddress();
          final TlsStrategy tlsStrategy = tlsStrategyLookup != null ? tlsStrategyLookup.lookup(host.getSchemeName()) : null;
          final Future<IOSession> sessionFuture = sessionRequester.connect(
                  connectionInitiator,
                  remoteEndpoint,
                  remoteAddress != null ? new InetSocketAddress(remoteAddress, remoteEndpoint.getPort()) : null,
                  localAddress,
                  connectTimeout,
                  attachment,
                  new FutureCallback<IOSession>() {
  
                      @Override
                      public void completed(final IOSession session) {
                          final DefaultManagedAsyncClientConnectionyncClientConnection.html#DefaultManagedAsyncClientConnection">DefaultManagedAsyncClientConnection connection = new DefaultManagedAsyncClientConnection(session);
                          if (tlsStrategy != null) {
                              try {
                                  tlsStrategy.upgrade(
                                          connection,
                                          host,
                                          session.getLocalAddress(),
                                          session.getRemoteAddress(),
                                          attachment,
                                         connectTimeout);
                             } catch (final Exception ex) {
                                 future.failed(ex);
                                 return;
                             }
                         }
                         future.completed(connection);
                     }
 
                     @Override
                     public void failed(final Exception ex) {
                         future.failed(ex);
                     }
 
                     @Override
                     public void cancelled() {
                         future.cancel();
                     }
 
                 });
         future.setDependency(sessionFuture);
         return future;
     }
 
     @Override
     public void upgrade(final ManagedAsyncClientConnection connection, final HttpHost host, final Object attachment) {
         final TlsStrategy tlsStrategy = tlsStrategyLookup != null ? tlsStrategyLookup.lookup(host.getSchemeName()) : null;
         if (tlsStrategy != null) {
             tlsStrategy.upgrade(
                     connection,
                     host,
                     connection.getLocalAddress(),
                     connection.getRemoteAddress(),
                     attachment,
                     null);
         }
 
     }
 }