/*
    * ====================================================================
    * 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.client5.http.impl.io;
  
  import java.io.IOException;
  import java.io.InterruptedIOException;
  import java.net.Socket;
  import java.nio.charset.CharsetDecoder;
  import java.nio.charset.CharsetEncoder;
  import java.util.concurrent.atomic.AtomicBoolean;
  
  import javax.net.ssl.SSLSession;
  import javax.net.ssl.SSLSocket;
  
  import org.apache.hc.client5.http.io.ManagedHttpClientConnection;
  import org.apache.hc.core5.http.ClassicHttpRequest;
  import org.apache.hc.core5.http.ClassicHttpResponse;
  import org.apache.hc.core5.http.ContentLengthStrategy;
  import org.apache.hc.core5.http.Header;
  import org.apache.hc.core5.http.config.Http1Config;
  import org.apache.hc.core5.http.impl.io.DefaultBHttpClientConnection;
  import org.apache.hc.core5.http.impl.io.SocketHolder;
  import org.apache.hc.core5.http.io.HttpMessageParserFactory;
  import org.apache.hc.core5.http.io.HttpMessageWriterFactory;
  import org.apache.hc.core5.http.message.RequestLine;
  import org.apache.hc.core5.http.message.StatusLine;
  import org.apache.hc.core5.io.CloseMode;
  import org.apache.hc.core5.util.Identifiable;
  import org.apache.hc.core5.util.Timeout;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  final class DefaultManagedHttpClientConnection
          extends DefaultBHttpClientConnection implements ManagedHttpClientConnection, Identifiable {
  
      private static final Logger LOG = LoggerFactory.getLogger(DefaultManagedHttpClientConnection.class);
      private static final Logger HEADER_LOG = LoggerFactory.getLogger("org.apache.hc.client5.http.headers");
      private static final Logger WIRE_LOG = LoggerFactory.getLogger("org.apache.hc.client5.http.wire");
  
      private final String id;
      private final AtomicBoolean closed;
  
      private Timeout socketTimeout;
  
      public DefaultManagedHttpClientConnection(
              final String id,
              final CharsetDecoder charDecoder,
              final CharsetEncoder charEncoder,
              final Http1Config h1Config,
              final ContentLengthStrategy incomingContentStrategy,
              final ContentLengthStrategy outgoingContentStrategy,
              final HttpMessageWriterFactory<ClassicHttpRequest> requestWriterFactory,
              final HttpMessageParserFactory<ClassicHttpResponse> responseParserFactory) {
          super(h1Config, charDecoder, charEncoder, incomingContentStrategy, outgoingContentStrategy, requestWriterFactory, responseParserFactory);
          this.id = id;
          this.closed = new AtomicBoolean();
      }
  
      public DefaultManagedHttpClientConnection(final String id) {
          this(id, null, null, null, null, null, null, null);
      }
  
      @Override
      public String getId() {
          return this.id;
      }
  
      @Override
      public void bind(final SocketHolder socketHolder) throws IOException {
          if (this.closed.get()) {
              final Socket socket = socketHolder.getSocket();
              socket.close(); // allow this to throw...
              // ...but if it doesn't, explicitly throw one ourselves.
              throw new InterruptedIOException("Connection already shutdown");
         }
         super.bind(socketHolder);
         socketTimeout = Timeout.ofMilliseconds(socketHolder.getSocket().getSoTimeout());
     }
 
     @Override
     public Socket getSocket() {
         final SocketHolder socketHolder = getSocketHolder();
         return socketHolder != null ? socketHolder.getSocket() : null;
     }
 
     @Override
     public SSLSession getSSLSession() {
         final Socket socket = getSocket();
         if (socket instanceof SSLSocket) {
             return ((SSLSocket) socket).getSession();
         } else {
             return null;
         }
     }
 
     @Override
     public void close() throws IOException {
         if (this.closed.compareAndSet(false, true)) {
             if (LOG.isDebugEnabled()) {
                 LOG.debug("{}: Close connection", this.id);
             }
             super.close();
         }
     }
 
     @Override
     public void setSocketTimeout(final Timeout timeout) {
         if (LOG.isDebugEnabled()) {
             LOG.debug("{}: set socket timeout to {}", this.id, timeout);
         }
         super.setSocketTimeout(timeout);
     }
 
     @Override
     public void close(final CloseMode closeMode) {
         if (this.closed.compareAndSet(false, true)) {
             if (LOG.isDebugEnabled()) {
                 LOG.debug("{}: close connection {}", this.id, closeMode);
             }
             super.close(closeMode);
         }
     }
 
     @Override
     public void bind(final Socket socket) throws IOException {
         super.bind(WIRE_LOG.isDebugEnabled() ? new LoggingSocketHolder(socket, this.id, WIRE_LOG) : new SocketHolder(socket));
         socketTimeout = Timeout.ofMilliseconds(socket.getSoTimeout());
     }
 
     @Override
     protected void onResponseReceived(final ClassicHttpResponse response) {
         if (response != null && HEADER_LOG.isDebugEnabled()) {
             HEADER_LOG.debug("{} << {}", this.id, new StatusLine(response));
             final Header[] headers = response.getHeaders();
             for (final Header header : headers) {
                 HEADER_LOG.debug("{} << {}", this.id, header);
             }
         }
     }
 
     @Override
     protected void onRequestSubmitted(final ClassicHttpRequest request) {
         if (request != null && HEADER_LOG.isDebugEnabled()) {
             HEADER_LOG.debug("{} >> {}", this.id, new RequestLine(request));
             final Header[] headers = request.getHeaders();
             for (final Header header : headers) {
                 HEADER_LOG.debug("{} >> {}", this.id, header);
             }
         }
     }
 
     @Override
     public void passivate() {
         super.setSocketTimeout(Timeout.ZERO_MILLISECONDS);
     }
 
     @Override
     public void activate() {
         super.setSocketTimeout(socketTimeout);
     }
 
 }