/*
    * 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.
   */
  package io.netty.testsuite.transport.socket;
  
  import io.netty.bootstrap.Bootstrap;
  import io.netty.bootstrap.ServerBootstrap;
  import io.netty.channel.Channel;
  import io.netty.channel.ChannelHandlerContext;
  import io.netty.channel.ChannelInboundHandlerAdapter;
  import io.netty.channel.ChannelInitializer;
  import io.netty.channel.ChannelOption;
  import io.netty.handler.codec.serialization.ClassResolvers;
  import io.netty.handler.codec.serialization.ObjectDecoder;
  import io.netty.handler.codec.serialization.ObjectEncoder;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.TestInfo;
  
  import java.io.IOException;
  import java.util.Random;
  import java.util.concurrent.atomic.AtomicReference;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class SocketObjectEchoTest extends AbstractSocketTest {
  
      static final Random random = new Random();
      static final String[] data = new String[1024];
  
      static {
          for (int i = 0; i < data.length; i ++) {
              int eLen = random.nextInt(512);
              char[] e = new char[eLen];
              for (int j = 0; j < eLen; j ++) {
                  e[j] = (char) ('a' + random.nextInt(26));
              }
  
              data[i] = new String(e);
          }
      }
  
      @Test
      public void testObjectEcho(TestInfo testInfo) throws Throwable {
          run(testInfo, new Runner<ServerBootstrap, Bootstrap>() {
              @Override
              public void run(ServerBootstrap serverBootstrap, Bootstrap bootstrap) throws Throwable {
                  testObjectEcho(serverBootstrap, bootstrap);
              }
          });
      }
  
      public void testObjectEcho(ServerBootstrap sb, Bootstrap cb) throws Throwable {
          testObjectEcho(sb, cb, true);
      }
  
      @Test
      public void testObjectEchoNotAutoRead(TestInfo testInfo) throws Throwable {
          run(testInfo, new Runner<ServerBootstrap, Bootstrap>() {
              @Override
              public void run(ServerBootstrap serverBootstrap, Bootstrap bootstrap) throws Throwable {
                  testObjectEchoNotAutoRead(serverBootstrap, bootstrap);
              }
          });
      }
  
      public void testObjectEchoNotAutoRead(ServerBootstrap sb, Bootstrap cb) throws Throwable {
          testObjectEcho(sb, cb, false);
      }
  
      private static void testObjectEcho(ServerBootstrap sb, Bootstrap cb, boolean autoRead) throws Throwable {
          sb.childOption(ChannelOption.AUTO_READ, autoRead);
          cb.option(ChannelOption.AUTO_READ, autoRead);
  
          final EchoHandler sh = new EchoHandler(autoRead);
          final EchoHandler ch = new EchoHandler(autoRead);
  
          sb.childHandler(new ChannelInitializer<Channel>() {
              @Override
              public void initChannel(Channel sch) throws Exception {
                  sch.pipeline().addLast(
                          new ObjectDecoder(ClassResolvers.cacheDisabled(getClass().getClassLoader())),
                          new ObjectEncoder(),
                          sh);
              }
          });
  
          cb.handler(new ChannelInitializer<Channel>() {
             @Override
             public void initChannel(Channel sch) throws Exception {
                 sch.pipeline().addLast(
                         new ObjectDecoder(ClassResolvers.cacheDisabled(getClass().getClassLoader())),
                         new ObjectEncoder(),
                         ch);
             }
         });
 
         Channel sc = sb.bind().sync().channel();
         Channel cc = cb.connect(sc.localAddress()).sync().channel();
         for (String element : data) {
             cc.writeAndFlush(element);
         }
 
         while (ch.counter < data.length) {
             if (sh.exception.get() != null) {
                 break;
             }
             if (ch.exception.get() != null) {
                 break;
             }
 
             Thread.sleep(50);
         }
 
         while (sh.counter < data.length) {
             if (sh.exception.get() != null) {
                 break;
             }
             if (ch.exception.get() != null) {
                 break;
             }
 
             Thread.sleep(50);
         }
 
         sh.channel.close().sync();
         ch.channel.close().sync();
         sc.close().sync();
 
         if (sh.exception.get() != null && !(sh.exception.get() instanceof IOException)) {
             throw sh.exception.get();
         }
         if (ch.exception.get() != null && !(ch.exception.get() instanceof IOException)) {
             throw ch.exception.get();
         }
         if (sh.exception.get() != null) {
             throw sh.exception.get();
         }
         if (ch.exception.get() != null) {
             throw ch.exception.get();
         }
     }
 
     private static class EchoHandler extends ChannelInboundHandlerAdapter {
         private final boolean autoRead;
         volatile Channel channel;
         final AtomicReference<Throwable> exception = new AtomicReference<Throwable>();
         volatile int counter;
 
         EchoHandler(boolean autoRead) {
             this.autoRead = autoRead;
         }
 
         @Override
         public void channelActive(ChannelHandlerContext ctx)
                 throws Exception {
             channel = ctx.channel();
             if (!autoRead) {
                 ctx.read();
             }
         }
 
         @Override
         public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
             assertEquals(data[counter], msg);
 
             if (channel.parent() != null) {
                 channel.write(msg);
             }
 
             counter ++;
         }
 
         @Override
         public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
             try {
                 ctx.flush();
             } finally {
                 if (!autoRead) {
                     ctx.read();
                 }
             }
         }
 
         @Override
         public void exceptionCaught(ChannelHandlerContext ctx,
                 Throwable cause) throws Exception {
             if (exception.compareAndSet(null, cause)) {
                 ctx.close();
             }
         }
     }
 }