/*
    * Copyright 2012 The Netty Project
    *
    * The Netty Project 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.jboss.netty.channel.socket.oio;
  
  import org.jboss.netty.channel.ChannelEvent;
  import org.jboss.netty.channel.ChannelFuture;
  import org.jboss.netty.channel.ChannelFutureListener;
  import org.jboss.netty.channel.ChannelPipeline;
  import org.jboss.netty.channel.ChannelState;
  import org.jboss.netty.channel.ChannelStateEvent;
  import org.jboss.netty.channel.MessageEvent;
  import org.jboss.netty.util.ThreadNameDeterminer;
  import org.jboss.netty.util.ThreadRenamingRunnable;
  import org.jboss.netty.util.internal.DeadLockProofWorker;
  
  import java.io.PushbackInputStream;
  import java.net.ConnectException;
  import java.net.SocketAddress;
  import java.util.concurrent.Executor;
  
  import static org.jboss.netty.channel.Channels.*;
  
  class OioClientSocketPipelineSink extends AbstractOioChannelSink {
  
      private final Executor workerExecutor;
      private final ThreadNameDeterminer determiner;
  
      OioClientSocketPipelineSink(Executor workerExecutor, ThreadNameDeterminer determiner) {
          this.workerExecutor = workerExecutor;
          this.determiner = determiner;
      }
  
      public void eventSunk(
              ChannelPipeline pipeline, ChannelEvent e) throws Exception {
          OioClientSocketChannel channel = (OioClientSocketChannel) e.getChannel();
          ChannelFuture future = e.getFuture();
          if (e instanceof ChannelStateEvent) {
              ChannelStateEvent stateEvent = (ChannelStateEvent) e;
              ChannelState state = stateEvent.getState();
              Object value = stateEvent.getValue();
              switch (state) {
              case OPEN:
                  if (Boolean.FALSE.equals(value)) {
                      AbstractOioWorker.close(channel, future);
                  }
                  break;
              case BOUND:
                  if (value != null) {
                      bind(channel, future, (SocketAddress) value);
                  } else {
                      AbstractOioWorker.close(channel, future);
                  }
                  break;
              case CONNECTED:
                  if (value != null) {
                      connect(channel, future, (SocketAddress) value);
                  } else {
                      AbstractOioWorker.close(channel, future);
                  }
                  break;
              case INTEREST_OPS:
                  AbstractOioWorker.setInterestOps(channel, future, ((Integer) value).intValue());
                  break;
              }
          } else if (e instanceof MessageEvent) {
              OioWorker.write(
                      channel, future,
                      ((MessageEvent) e).getMessage());
          }
      }
  
      private static void bind(
              OioClientSocketChannel channel, ChannelFuture future,
              SocketAddress localAddress) {
          try {
              channel.socket.bind(localAddress);
              future.setSuccess();
              fireChannelBound(channel, channel.getLocalAddress());
          } catch (Throwable t) {
              future.setFailure(t);
              fireExceptionCaught(channel, t);
          }
      }
  
      private void connect(
              OioClientSocketChannel channel, ChannelFuture future,
             SocketAddress remoteAddress) {
 
         boolean bound = channel.isBound();
         boolean connected = false;
         boolean workerStarted = false;
 
         future.addListener(ChannelFutureListener.CLOSE_ON_FAILURE);
 
         try {
             channel.socket.connect(
                     remoteAddress, channel.getConfig().getConnectTimeoutMillis());
             connected = true;
 
             // Obtain I/O stream.
             channel.in = new PushbackInputStream(channel.socket.getInputStream(), 1);
             channel.out = channel.socket.getOutputStream();
 
             // Fire events.
             future.setSuccess();
             if (!bound) {
                 fireChannelBound(channel, channel.getLocalAddress());
             }
             fireChannelConnected(channel, channel.getRemoteAddress());
 
             // Start the business.
             DeadLockProofWorker.start(
                     workerExecutor,
                     new ThreadRenamingRunnable(
                             new OioWorker(channel),
                             "Old I/O client worker (" + channel + ')',
                             determiner));
             workerStarted = true;
         } catch (Throwable t) {
             if (t instanceof ConnectException) {
                 if (t instanceof ConnectException) {
                     Throwable newT = new ConnectException(t.getMessage() + ": " + remoteAddress);
                     newT.setStackTrace(t.getStackTrace());
                     t = newT;
                 }
             }
             future.setFailure(t);
             fireExceptionCaught(channel, t);
         } finally {
             if (connected && !workerStarted) {
                 AbstractOioWorker.close(channel, future);
             }
         }
     }
 }