/*
    * ====================================================================
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.hc.core5.testing.nio;
  
  import java.net.InetSocketAddress;
  import java.nio.ByteBuffer;
  import java.util.Set;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.Future;
  
  import org.apache.hc.core5.io.CloseMode;
  import org.apache.hc.core5.reactor.DefaultListeningIOReactor;
  import org.apache.hc.core5.reactor.IOEventHandler;
  import org.apache.hc.core5.reactor.IOEventHandlerFactory;
  import org.apache.hc.core5.reactor.IOReactorConfig;
  import org.apache.hc.core5.reactor.IOReactorStatus;
  import org.apache.hc.core5.reactor.IOSession;
  import org.apache.hc.core5.reactor.ListenerEndpoint;
  import org.apache.hc.core5.reactor.ProtocolIOSession;
  import org.apache.hc.core5.util.TimeValue;
  import org.apache.hc.core5.util.Timeout;
  import org.junit.After;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  
  /**
   * Basic tests for {@link DefaultListeningIOReactor}.
   */
  public class TestDefaultListeningIOReactor {
  
      private DefaultListeningIOReactor ioReactor;
  
      private static class NoopIOEventHandlerFactory implements IOEventHandlerFactory {
  
          @Override
          public IOEventHandler createHandler(final ProtocolIOSession ioSession, final Object attachment) {
              return new IOEventHandler() {
  
                  @Override
                  public void connected(final IOSession session) {
                  }
  
                  @Override
                  public void inputReady(final IOSession session, final ByteBuffer src) {
                  }
  
                  @Override
                  public void outputReady(final IOSession session) {
                  }
  
                  @Override
                  public void timeout(final IOSession session, final Timeout timeout) {
                  }
  
                  @Override
                  public void exception(final IOSession session, final Exception cause) {
                  }
  
                  @Override
                  public void disconnected(final IOSession session) {
                  }
              };
          }
      }
  
      @Before
      public void setup() throws Exception {
          final IOReactorConfig reactorConfig = IOReactorConfig.custom()
                  .setIoThreadCount(1)
                  .build();
          this.ioReactor = new DefaultListeningIOReactor(new NoopIOEventHandlerFactory(), reactorConfig, null);
      }
  
     @After
     public void cleanup() throws Exception {
         if (this.ioReactor != null) {
             this.ioReactor.close(CloseMode.IMMEDIATE);
         }
     }
 
     @Test
     public void testEndpointUpAndDown() throws Exception {
         ioReactor.start();
 
         Set<ListenerEndpoint> endpoints = ioReactor.getEndpoints();
         Assert.assertNotNull(endpoints);
         Assert.assertEquals(0, endpoints.size());
 
         final Future<ListenerEndpoint> future1 = ioReactor.listen(new InetSocketAddress(0));
         final ListenerEndpoint endpoint1 = future1.get();
 
         final Future<ListenerEndpoint> future2 = ioReactor.listen(new InetSocketAddress(0));
         final ListenerEndpoint endpoint2 = future2.get();
         final int port = ((InetSocketAddress) endpoint2.getAddress()).getPort();
 
         endpoints = ioReactor.getEndpoints();
         Assert.assertNotNull(endpoints);
         Assert.assertEquals(2, endpoints.size());
 
         endpoint1.close();
 
         endpoints = ioReactor.getEndpoints();
         Assert.assertNotNull(endpoints);
         Assert.assertEquals(1, endpoints.size());
 
         final ListenerEndpoint endpoint = endpoints.iterator().next();
 
         Assert.assertEquals(port, ((InetSocketAddress) endpoint.getAddress()).getPort());
 
         ioReactor.close(CloseMode.GRACEFUL);
         ioReactor.awaitShutdown(TimeValue.ofSeconds(5));
         Assert.assertEquals(IOReactorStatus.SHUT_DOWN, ioReactor.getStatus());
     }
 
     @Test
     public void testEndpointAlreadyBound() throws Exception {
         ioReactor.start();
 
         final Future<ListenerEndpoint> future1 = ioReactor.listen(new InetSocketAddress(0));
         final ListenerEndpoint endpoint1 = future1.get();
         final int port = ((InetSocketAddress) endpoint1.getAddress()).getPort();
 
         final Future<ListenerEndpoint> future2 = ioReactor.listen(new InetSocketAddress(port));
         try {
             future2.get();
             Assert.fail("ExecutionException expected");
         } catch (final ExecutionException expected) {
         }
         ioReactor.close(CloseMode.GRACEFUL);
         ioReactor.awaitShutdown(TimeValue.ofSeconds(5));
 
         Assert.assertEquals(IOReactorStatus.SHUT_DOWN, ioReactor.getStatus());
     }
 
 }