/*
    * ====================================================================
    * 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.FilterInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.apache.hc.client5.http.impl.Wire;
  
  /**
   * Delegates {@link InputStream} calls and logs to a {@link Wire}.
   */
  class LoggingInputStream extends FilterInputStream {
  
      private final Wire wire;
  
      LoggingInputStream(final InputStream in, final Wire wire) {
          super(in);
          this.wire = wire;
      }
  
      @Override
      public int read() throws IOException {
          try {
              final int b = in.read();
              if (b == -1) {
                  wire.input("end of stream");
              } else {
                  wire.input(b);
              }
              return b;
          } catch (final IOException ex) {
              wire.input("[read] I/O error: " + ex.getMessage());
              throw ex;
          }
      }
  
      @Override
      public int read(final byte[] b) throws IOException {
          try {
              final int bytesRead = in.read(b);
              if (bytesRead == -1) {
                  wire.input("end of stream");
              } else if (bytesRead > 0) {
                  wire.input(b, 0, bytesRead);
              }
              return bytesRead;
          } catch (final IOException ex) {
              wire.input("[read] I/O error: " + ex.getMessage());
              throw ex;
          }
      }
  
      @Override
      public int read(final byte[] b, final int off, final int len) throws IOException {
          try {
              final int bytesRead = in.read(b, off, len);
              if (bytesRead == -1) {
                  wire.input("end of stream");
              } else if (bytesRead > 0) {
                  wire.input(b, off, bytesRead);
              }
              return bytesRead;
          } catch (final IOException ex) {
              wire.input("[read] I/O error: " + ex.getMessage());
              throw ex;
          }
      }
  
      @Override
      public long skip(final long n) throws IOException {
          try {
              return in.skip(n);
         } catch (final IOException ex) {
             wire.input("[skip] I/O error: " + ex.getMessage());
             throw ex;
         }
     }
 
     @Override
     public int available() throws IOException {
         try {
             return in.available();
         } catch (final IOException ex) {
             wire.input("[available] I/O error: " + ex.getMessage());
             throw ex;
         }
     }
 
     @Override
     public void close() throws IOException {
         try {
             in.close();
         } catch (final IOException ex) {
             wire.input("[close] I/O error: " + ex.getMessage());
             throw ex;
         }
     }
 
 }