/*
    * ====================================================================
    * 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.core5.reactor;
  
  import java.net.SocketAddress;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.Future;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.apache.hc.core5.concurrent.BasicFuture;
  import org.apache.hc.core5.concurrent.FutureCallback;
  import org.apache.hc.core5.io.CloseMode;
  import org.apache.hc.core5.io.ModalCloseable;
  import org.apache.hc.core5.net.NamedEndpoint;
  import org.apache.hc.core5.util.Timeout;
  
  final class IOSessionRequest implements Future<IOSession> {
  
      final NamedEndpoint remoteEndpoint;
      final SocketAddress remoteAddress;
      final SocketAddress localAddress;
      final Timeout timeout;
      final Object attachment;
      final BasicFuture<IOSession> future;
  
      private final AtomicReference<ModalCloseable> closeableRef;
  
      public IOSessionRequest(
              final NamedEndpoint remoteEndpoint,
              final SocketAddress remoteAddress,
              final SocketAddress localAddress,
              final Timeout timeout,
              final Object attachment,
              final FutureCallback<IOSession> callback) {
          super();
          this.remoteEndpoint = remoteEndpoint;
          this.remoteAddress = remoteAddress;
          this.localAddress = localAddress;
          this.timeout = timeout;
          this.attachment = attachment;
          this.future = new BasicFuture<>(callback);
          this.closeableRef = new AtomicReference<>();
      }
  
      public void completed(final ProtocolIOSession ioSession) {
          future.completed(ioSession);
          closeableRef.set(null);
      }
  
      public void failed(final Exception cause) {
          future.failed(cause);
          closeableRef.set(null);
      }
  
      public boolean cancel() {
          final boolean cancelled = future.cancel();
          final ModalCloseable closeable = closeableRef.getAndSet(null);
          if (cancelled && closeable != null) {
              closeable.close(CloseMode.IMMEDIATE);
          }
          return cancelled;
      }
  
      @Override
      public boolean cancel(final boolean mayInterruptIfRunning) {
          return cancel();
      }
  
      @Override
      public boolean isCancelled() {
          return future.isCancelled();
      }
 
     public void assign(final ModalCloseable closeable) {
         closeableRef.set(closeable);
     }
 
     @Override
     public boolean isDone() {
         return future.isDone();
     }
 
     @Override
     public IOSession get() throws InterruptedException, ExecutionException {
         return future.get();
     }
 
     @Override
     public IOSession get(final long timeout, final TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
         return future.get(timeout, unit);
     }
 
     @Override
     public String toString() {
         return "[" +
                 "remoteEndpoint=" + remoteEndpoint +
                 ", remoteAddress=" + remoteAddress +
                 ", localAddress=" + localAddress +
                 ", attachment=" + attachment +
                 ']';
     }
 
 }