/*
    * Copyright 2013 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 io.netty.handler.codec.http.websocketx;
  
  import io.netty.channel.ChannelFuture;
  import io.netty.channel.ChannelFutureListener;
  import io.netty.channel.ChannelHandlerContext;
  import io.netty.channel.ChannelInboundHandlerAdapter;
  import io.netty.handler.codec.http.FullHttpResponse;
  
  class WebSocketClientProtocolHandshakeHandler extends ChannelInboundHandlerAdapter {
      private final WebSocketClientHandshaker handshaker;
  
      WebSocketClientProtocolHandshakeHandler(WebSocketClientHandshaker handshaker) {
          this.handshaker = handshaker;
      }
  
      @Override
      public void channelActive(final ChannelHandlerContext ctx) throws Exception {
          super.channelActive(ctx);
          handshaker.handshake(ctx.channel()).addListener(new ChannelFutureListener() {
              @Override
              public void operationComplete(ChannelFuture future) throws Exception {
                  if (!future.isSuccess()) {
                      ctx.fireExceptionCaught(future.cause());
                  } else {
                      ctx.fireUserEventTriggered(
                              WebSocketClientProtocolHandler.ClientHandshakeStateEvent.HANDSHAKE_ISSUED);
                  }
              }
          });
      }
  
      @Override
      public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
          if (!(msg instanceof FullHttpResponse)) {
              ctx.fireChannelRead(msg);
              return;
          }
  
          FullHttpResponse response = (FullHttpResponse) msg;
          try {
              if (!handshaker.isHandshakeComplete()) {
                  handshaker.finishHandshake(ctx.channel(), response);
                  ctx.fireUserEventTriggered(
                          WebSocketClientProtocolHandler.ClientHandshakeStateEvent.HANDSHAKE_COMPLETE);
                  ctx.pipeline().remove(this);
                  return;
              }
              throw new IllegalStateException("WebSocketClientHandshaker should have been non finished yet");
          } finally {
              response.release();
          }
      }
  }