/*
    * ====================================================================
    * 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.async;
  
  import java.io.IOException;
  import java.net.SocketAddress;
  import java.nio.ByteBuffer;
  import java.nio.channels.ByteChannel;
  import java.nio.channels.SelectionKey;
  import java.util.concurrent.locks.Lock;
  
  import org.apache.hc.client5.http.impl.Wire;
  import org.apache.hc.core5.io.CloseMode;
  import org.apache.hc.core5.reactor.Command;
  import org.apache.hc.core5.reactor.IOEventHandler;
  import org.apache.hc.core5.reactor.IOSession;
  import org.apache.hc.core5.util.Timeout;
  import org.slf4j.Logger;
  
  class LoggingIOSession implements IOSession {
  
      private final Logger log;
      private final Wire wireLog;
      private final String id;
      private final IOSession session;
  
      public LoggingIOSession(final IOSession session, final Logger log, final Logger wireLog) {
          super();
          this.session = session;
          this.id = session.getId();
          this.log = log;
          this.wireLog = new Wire(wireLog, this.id);
      }
  
      @Override
      public String getId() {
          return session.getId();
      }
  
      @Override
      public Lock getLock() {
          return this.session.getLock();
      }
  
      @Override
      public boolean hasCommands() {
          return this.session.hasCommands();
      }
  
      @Override
      public Command poll() {
          return this.session.poll();
      }
  
      @Override
      public void enqueue(final Command command, final Command.Priority priority) {
          this.session.enqueue(command, priority);
          if (log.isDebugEnabled()) {
              log.debug("{} Enqueued {} with priority {}", this.session, command.getClass().getSimpleName(), priority);
          }
      }
  
      @Override
      public ByteChannel channel() {
          return this.session.channel();
      }
  
      @Override
      public SocketAddress getLocalAddress() {
          return this.session.getLocalAddress();
      }
  
      @Override
      public SocketAddress getRemoteAddress() {
         return this.session.getRemoteAddress();
     }
 
     @Override
     public int getEventMask() {
         return this.session.getEventMask();
     }
 
     private static String formatOps(final int ops) {
         final StringBuilder buffer = new StringBuilder(6);
         buffer.append('[');
         if ((ops & SelectionKey.OP_READ) > 0) {
             buffer.append('r');
         }
         if ((ops & SelectionKey.OP_WRITE) > 0) {
             buffer.append('w');
         }
         if ((ops & SelectionKey.OP_ACCEPT) > 0) {
             buffer.append('a');
         }
         if ((ops & SelectionKey.OP_CONNECT) > 0) {
             buffer.append('c');
         }
         buffer.append(']');
         return buffer.toString();
     }
 
     @Override
     public void setEventMask(final int ops) {
         this.session.setEventMask(ops);
         if (log.isDebugEnabled()) {
             log.debug("{} {}: Event mask set {}", this.id, this.session, formatOps(ops));
         }
     }
 
     @Override
     public void setEvent(final int op) {
         this.session.setEvent(op);
         if (log.isDebugEnabled()) {
             log.debug("{} {}: Event set {}", this.id, this.session, formatOps(op));
         }
     }
 
     @Override
     public void clearEvent(final int op) {
         this.session.clearEvent(op);
         if (log.isDebugEnabled()) {
             log.debug("{} {}: Event cleared {}", this.id, this.session, formatOps(op));
         }
     }
 
     @Override
     public boolean isOpen() {
         return session.isOpen();
     }
 
     @Override
     public void close() {
         if (log.isDebugEnabled()) {
             log.debug("{} {}: Close", this.id, this.session);
         }
         this.session.close();
     }
 
     @Override
     public Status getStatus() {
         return this.session.getStatus();
     }
 
     @Override
     public void close(final CloseMode closeMode) {
         if (log.isDebugEnabled()) {
             log.debug("{} {}: Close {}", this.id, this.session, closeMode);
         }
         this.session.close(closeMode);
     }
 
     @Override
     public Timeout getSocketTimeout() {
         return this.session.getSocketTimeout();
     }
 
     @Override
     public void setSocketTimeout(final Timeout timeout) {
         if (log.isDebugEnabled()) {
             log.debug("{} {}: Set timeout {}", this.id, this.session, timeout);
         }
         this.session.setSocketTimeout(timeout);
     }
 
     @Override
     public long getLastReadTime() {
         return this.session.getLastReadTime();
     }
 
     @Override
     public long getLastWriteTime() {
         return this.session.getLastWriteTime();
     }
 
     @Override
     public void updateReadTime() {
         this.session.updateReadTime();
     }
 
     @Override
     public void updateWriteTime() {
         this.session.updateWriteTime();
     }
 
     @Override
     public long getLastEventTime() {
         return this.session.getLastEventTime();
     }
 
     @Override
     public IOEventHandler getHandler() {
         return this.session.getHandler();
     }
 
     @Override
     public void upgrade(final IOEventHandler handler) {
         this.session.upgrade(handler);
     }
 
     @Override
     public int read(final ByteBuffer dst) throws IOException {
         final int bytesRead = this.session.channel().read(dst);
         if (log.isDebugEnabled()) {
             log.debug("{} {}: {} bytes read", this.id, this.session, bytesRead);
         }
         if (bytesRead > 0 && this.wireLog.isEnabled()) {
             final ByteBuffer b = dst.duplicate();
             final int p = b.position();
             b.limit(p);
             b.position(p - bytesRead);
             this.wireLog.input(b);
         }
         return bytesRead;
     }
 
 
     @Override
     public int write(final ByteBuffer src) throws IOException {
         final int byteWritten = session.channel().write(src);
         if (log.isDebugEnabled()) {
             log.debug("{} {}: {} bytes written", this.id, this.session, byteWritten);
         }
         if (byteWritten > 0 && this.wireLog.isEnabled()) {
             final ByteBuffer b = src.duplicate();
             final int p = b.position();
             b.limit(p);
             b.position(p - byteWritten);
             this.wireLog.output(b);
         }
         return byteWritten;
     }
 
     @Override
     public String toString() {
         return this.id + " " + this.session;
     }
 
 }