//
   //  ========================================================================
   //  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
   //  ------------------------------------------------------------------------
   //  All rights reserved. This program and the accompanying materials
   //  are made available under the terms of the Eclipse Public License v1.0
   //  and Apache License v2.0 which accompanies this distribution.
   //
   //      The Eclipse Public License is available at
  //      http://www.eclipse.org/legal/epl-v10.html
  //
  //      The Apache License v2.0 is available at
  //      http://www.opensource.org/licenses/apache2.0.php
  //
  //  You may elect to redistribute this code under either of these licenses.
  //  ========================================================================
  //
  
  package org.eclipse.jetty.websocket.common.events;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.Reader;
  import java.nio.ByteBuffer;
  
  import org.eclipse.jetty.websocket.api.WebSocketPolicy;
  import org.eclipse.jetty.websocket.api.annotations.WebSocket;
  import org.eclipse.jetty.websocket.api.extensions.Frame;
  import org.eclipse.jetty.websocket.common.CloseInfo;
  import org.eclipse.jetty.websocket.common.message.MessageAppender;
  import org.eclipse.jetty.websocket.common.message.MessageInputStream;
  import org.eclipse.jetty.websocket.common.message.MessageReader;
  import org.eclipse.jetty.websocket.common.message.SimpleBinaryMessage;
  import org.eclipse.jetty.websocket.common.message.SimpleTextMessage;
  
  /**
   * Handler for Annotated User WebSocket objects.
   */
  public class AnnotatedEventDriver extends EventDriver
  {
      private final EventMethods events;
      private MessageAppender activeMessage;
      private boolean hasCloseBeenCalled = false;
  
      public AnnotatedEventDriver(WebSocketPolicy policy, Object websocket, EventMethods events)
      {
          super(policy,websocket);
          this.events = events;
  
          WebSocket anno = websocket.getClass().getAnnotation(WebSocket.class);
          // Setup the policy
          if (anno.maxMessageSize() > 0)
          {
              this.policy.setMaxMessageSize(anno.maxMessageSize());
          }
          if (anno.inputBufferSize() > 0)
          {
              this.policy.setInputBufferSize(anno.inputBufferSize());
          }
          if (anno.maxIdleTime() > 0)
          {
              this.policy.setIdleTimeout(anno.maxIdleTime());
          }
      }
  
      @Override
      public void onBinaryFrame(ByteBuffer buffer, boolean fin) throws IOException
      {
          if (events.onBinary == null)
          {
              // not interested in binary events
              return;
          }
  
          if (activeMessage == null)
          {
              if (events.onBinary.isStreaming())
              {
                  activeMessage = new MessageInputStream(this);
              }
              else
              {
                  activeMessage = new SimpleBinaryMessage(this);
              }
          }
  
          activeMessage.appendMessage(buffer);
  
          if (fin)
          {
              activeMessage.messageComplete();
              activeMessage = null;
          }
      }
  
      @Override
      public void onBinaryMessage(byte[] data)
      {
          if (events.onBinary != null)
         {
             events.onBinary.call(websocket,session,data,0,data.length);
         }
     }
 
     @Override
     public void onClose(CloseInfo close)
     {
         if (hasCloseBeenCalled)
         {
             // avoid duplicate close events (possible when using harsh Session.disconnect())
             return;
         }
         hasCloseBeenCalled = true;
         if (events.onClose != null)
         {
             events.onClose.call(websocket,session,close.getStatusCode(),close.getReason());
         }
     }
 
     @Override
     public void onConnect()
     {
         if (events.onConnect != null)
         {
             events.onConnect.call(websocket,session);
         }
     }
 
     @Override
     public void onError(Throwable cause)
     {
         if (events.onError != null)
         {
             events.onError.call(websocket,session,cause);
         }
     }
 
     @Override
     public void onFrame(Frame frame)
     {
         if (events.onFrame != null)
         {
             events.onFrame.call(websocket,session,frame);
         }
     }
 
     public void onInputStream(InputStream stream)
     {
         if (events.onBinary != null)
         {
             events.onBinary.call(websocket,session,stream);
         }
     }
 
     public void onReader(Reader reader)
     {
         if (events.onText != null)
         {
             events.onText.call(websocket,session,reader);
         }
     }
 
     @Override
     public void onTextFrame(ByteBuffer buffer, boolean fin) throws IOException
     {
         if (events.onText == null)
         {
             // not interested in text events
             return;
         }
 
         if (activeMessage == null)
         {
             if (events.onText.isStreaming())
             {
                 activeMessage = new MessageReader(this);
             }
             else
             {
                 activeMessage = new SimpleTextMessage(this);
             }
         }
 
         activeMessage.appendMessage(buffer);
 
         if (fin)
         {
             activeMessage.messageComplete();
             activeMessage = null;
         }
     }
 
     @Override
     public void onTextMessage(String message)
     {
         if (events.onText != null)
         {
             events.onText.call(websocket,session,message);
         }
     }
 
     @Override
     public String toString()
     {
         return String.format("%s[%s]", this.getClass().getSimpleName(), websocket);
     }
 }