/*
    * 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:
    *
    *   https://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.
   */
  //The MIT License
  //
  //Copyright (c) 2009 Carl Bystršm
  //
  //Permission is hereby granted, free of charge, to any person obtaining a copy
  //of this software and associated documentation files (the "Software"), to deal
  //in the Software without restriction, including without limitation the rights
  //to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  //copies of the Software, and to permit persons to whom the Software is
  //furnished to do so, subject to the following conditions:
  //
  //The above copyright notice and this permission notice shall be included in
  //all copies or substantial portions of the Software.
  //
  //THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  //IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  //AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  //LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  //THE SOFTWARE.
  
  package io.netty.example.http.websocketx.client;
  
  import io.netty.channel.Channel;
  import io.netty.channel.ChannelFuture;
  import io.netty.channel.ChannelHandlerContext;
  import io.netty.channel.ChannelPromise;
  import io.netty.channel.SimpleChannelInboundHandler;
  import io.netty.handler.codec.http.FullHttpResponse;
  import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
  import io.netty.handler.codec.http.websocketx.PongWebSocketFrame;
  import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
  import io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker;
  import io.netty.handler.codec.http.websocketx.WebSocketFrame;
  import io.netty.handler.codec.http.websocketx.WebSocketHandshakeException;
  import io.netty.util.CharsetUtil;
  
  public class WebSocketClientHandler extends SimpleChannelInboundHandler<Object> {
  
      private final WebSocketClientHandshaker handshaker;
      private ChannelPromise handshakeFuture;
  
      public WebSocketClientHandler(WebSocketClientHandshaker handshaker) {
          this.handshaker = handshaker;
      }
  
      public ChannelFuture handshakeFuture() {
          return handshakeFuture;
      }
  
      @Override
      public void handlerAdded(ChannelHandlerContext ctx) {
          handshakeFuture = ctx.newPromise();
      }
  
      @Override
      public void channelActive(ChannelHandlerContext ctx) {
          handshaker.handshake(ctx.channel());
      }
  
      @Override
      public void channelInactive(ChannelHandlerContext ctx) {
          System.out.println("WebSocket Client disconnected!");
      }
  
      @Override
      public void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
          Channel ch = ctx.channel();
          if (!handshaker.isHandshakeComplete()) {
              try {
                  handshaker.finishHandshake(ch, (FullHttpResponse) msg);
                  System.out.println("WebSocket Client connected!");
                  handshakeFuture.setSuccess();
              } catch (WebSocketHandshakeException e) {
                  System.out.println("WebSocket Client failed to connect");
                  handshakeFuture.setFailure(e);
              }
              return;
          }
  
          if (msg instanceof FullHttpResponse) {
              FullHttpResponse response = (FullHttpResponse) msg;
              throw new IllegalStateException(
                     "Unexpected FullHttpResponse (getStatus=" + response.status() +
                             ", content=" + response.content().toString(CharsetUtil.UTF_8) + ')');
         }
 
         WebSocketFrame frame = (WebSocketFrame) msg;
         if (frame instanceof TextWebSocketFrame) {
             TextWebSocketFrame textFrame = (TextWebSocketFrame) frame;
             System.out.println("WebSocket Client received message: " + textFrame.text());
         } else if (frame instanceof PongWebSocketFrame) {
             System.out.println("WebSocket Client received pong");
         } else if (frame instanceof CloseWebSocketFrame) {
             System.out.println("WebSocket Client received closing");
             ch.close();
         }
     }
 
     @Override
     public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
         cause.printStackTrace();
         if (!handshakeFuture.isDone()) {
             handshakeFuture.setFailure(cause);
         }
         ctx.close();
     }
 }