/*
    * 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.
   */
  
  package org.apache.commons.compress.compressors.brotli;
  
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.apache.commons.compress.compressors.CompressorInputStream;
  import org.apache.commons.compress.utils.InputStreamStatistics;
  import org.apache.commons.io.IOUtils;
  import org.apache.commons.io.input.BoundedInputStream;
  import org.brotli.dec.BrotliInputStream;
  
  /**
   * {@link CompressorInputStream} implementation to decode Brotli encoded stream. Library relies on <a href="https://github.com/google/brotli">Google brotli</a>
   *
   * @since 1.14
   */
  public class BrotliCompressorInputStream extends CompressorInputStream implements InputStreamStatistics {
  
      private final BoundedInputStream countingInputStream;
      private final BrotliInputStream brotliInputStream;
  
      public BrotliCompressorInputStream(final InputStream inputStream) throws IOException {
          brotliInputStream = new BrotliInputStream(countingInputStream = BoundedInputStream.builder().setInputStream(inputStream).get());
      }
  
      @Override
      public int available() throws IOException {
          return brotliInputStream.available();
      }
  
      @Override
      public void close() throws IOException {
          brotliInputStream.close();
      }
  
      /**
       * @since 1.17
       */
      @Override
      public long getCompressedCount() {
          return countingInputStream.getCount();
      }
  
      @Override
      public synchronized void mark(final int readLimit) {
          brotliInputStream.mark(readLimit);
      }
  
      @Override
      public boolean markSupported() {
          return brotliInputStream.markSupported();
      }
  
      @Override
      public int read() throws IOException {
          final int ret = brotliInputStream.read();
          count(ret == -1 ? 0 : 1);
          return ret;
      }
  
      @Override
      public int read(final byte[] b) throws IOException {
          return brotliInputStream.read(b);
      }
  
      @Override
      public int read(final byte[] buf, final int off, final int len) throws IOException {
          final int ret = brotliInputStream.read(buf, off, len);
          count(ret);
          return ret;
      }
  
      @Override
      public synchronized void reset() throws IOException {
          brotliInputStream.reset();
      }
  
      @Override
      public long skip(final long n) throws IOException {
          return IOUtils.skip(brotliInputStream, n);
      }
  
     @Override
     public String toString() {
         return brotliInputStream.toString();
     }
 }