/*
    * ====================================================================
    * 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.io.IOException;
  import java.util.List;
  
  import org.apache.hc.core5.http.Header;
  import org.apache.hc.core5.http.HttpConnection;
  import org.apache.hc.core5.http2.frame.FramePrinter;
  import org.apache.hc.core5.http2.frame.RawFrame;
  import org.apache.hc.core5.http2.impl.nio.H2StreamListener;
  import org.apache.hc.core5.testing.classic.LoggingSupport;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class LoggingH2StreamListener implements H2StreamListener {
  
      public final static LoggingH2StreamListenerStreamListener.html#LoggingH2StreamListener">LoggingH2StreamListener INSTANCE = new LoggingH2StreamListener();
  
      private final Logger headerLog;
      private final Logger frameLog;
      private final Logger framePayloadLog;
      private final Logger flowCtrlLog;
      private final FramePrinter framePrinter;
  
      private LoggingH2StreamListener() {
          this.framePrinter = new FramePrinter();
          this.headerLog = LoggerFactory.getLogger("org.apache.hc.core5.http.headers");
          this.frameLog = LoggerFactory.getLogger("org.apache.hc.core5.http2.frame");
          this.framePayloadLog = LoggerFactory.getLogger("org.apache.hc.core5.http2.frame.payload");
          this.flowCtrlLog = LoggerFactory.getLogger("org.apache.hc.core5.http2.flow");
      }
  
      private void logFrameInfo(final String prefix, final RawFrame frame) {
          try {
              final LogAppendableppendable.html#LogAppendable">LogAppendable logAppendable = new LogAppendable(frameLog, prefix);
              framePrinter.printFrameInfo(frame, logAppendable);
              logAppendable.flush();
          } catch (final IOException ignore) {
              // ignore
          }
      }
  
      private void logFramePayload(final String prefix, final RawFrame frame) {
          try {
              final LogAppendableppendable.html#LogAppendable">LogAppendable logAppendable = new LogAppendable(framePayloadLog, prefix);
              framePrinter.printPayload(frame, logAppendable);
              logAppendable.flush();
          } catch (final IOException ignore) {
              // ignore
          }
      }
  
      private void logFlowControl(final String prefix, final int streamId, final int delta, final int actualSize) {
          flowCtrlLog.debug("{} stream {} flow control {} -> {}", prefix, streamId, delta, actualSize);
      }
  
      @Override
      public void onHeaderInput(final HttpConnection connection, final int streamId, final List<? extends Header> headers) {
          if (headerLog.isDebugEnabled()) {
              final String prefix = LoggingSupport.getId(connection);
              for (int i = 0; i < headers.size(); i++) {
                  headerLog.debug("{} << {}", prefix, headers.get(i));
              }
          }
      }
  
      @Override
      public void onHeaderOutput(final HttpConnection connection, final int streamId, final List<? extends Header> headers) {
          if (headerLog.isDebugEnabled()) {
              final String prefix = LoggingSupport.getId(connection);
              for (int i = 0; i < headers.size(); i++) {
                  headerLog.debug("{} >> {}", prefix, headers.get(i));
             }
         }
     }
 
     @Override
     public void onFrameInput(final HttpConnection connection, final int streamId, final RawFrame frame) {
         if (frameLog.isDebugEnabled()) {
             logFrameInfo(LoggingSupport.getId(connection) + " <<", frame);
         }
         if (framePayloadLog.isDebugEnabled()) {
             logFramePayload(LoggingSupport.getId(connection) + " <<", frame);
         }
     }
 
     @Override
     public void onFrameOutput(final HttpConnection connection, final int streamId, final RawFrame frame) {
         if (frameLog.isDebugEnabled()) {
             logFrameInfo(LoggingSupport.getId(connection) + " >>", frame);
         }
         if (framePayloadLog.isDebugEnabled()) {
             logFramePayload(LoggingSupport.getId(connection) + " >>", frame);
         }
     }
 
     @Override
     public void onInputFlowControl(final HttpConnection connection, final int streamId, final int delta, final int actualSize) {
         if (flowCtrlLog.isDebugEnabled()) {
             logFlowControl(LoggingSupport.getId(connection) + "  in", streamId, delta, actualSize);
         }
     }
 
     @Override
     public void onOutputFlowControl(final HttpConnection connection, final int streamId, final int delta, final int actualSize) {
         if (flowCtrlLog.isDebugEnabled()) {
             logFlowControl(LoggingSupport.getId(connection) + " out", streamId, delta, actualSize);
         }
     }
 
 }