/*
    * Copyright 2022 The Apache Software Foundation
    *
    * Licensed 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.codehaus.plexus.archiver.zstd;
  
  import javax.annotation.Nonnull;
  import javax.inject.Named;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.apache.commons.compress.compressors.zstandard.ZstdCompressorInputStream;
  import org.codehaus.plexus.archiver.AbstractUnArchiver;
  import org.codehaus.plexus.archiver.ArchiverException;
  
  import static org.codehaus.plexus.archiver.util.Streams.bufferedInputStream;
  import static org.codehaus.plexus.archiver.util.Streams.bufferedOutputStream;
  import static org.codehaus.plexus.archiver.util.Streams.copyFully;
  import static org.codehaus.plexus.archiver.util.Streams.fileInputStream;
  import static org.codehaus.plexus.archiver.util.Streams.fileOutputStream;
  
  /**
   * Unarchiver for zstd-compressed files.
   */
  @Named("zst")
  public class ZstdUnArchiver extends AbstractUnArchiver {
  
      private static final String OPERATION_ZSTD = "zstd";
  
      public ZstdUnArchiver() {}
  
      public ZstdUnArchiver(File source) {
          super(source);
      }
  
      @Override
      protected void execute() throws ArchiverException {
          if (getSourceFile().lastModified() > getDestFile().lastModified()) {
              getLogger()
                      .info("Expanding " + getSourceFile().getAbsolutePath() + " to "
                              + getDestFile().getAbsolutePath());
  
              copyFully(
                      getZstdInputStream(bufferedInputStream(fileInputStream(getSourceFile(), OPERATION_ZSTD))),
                      bufferedOutputStream(fileOutputStream(getDestFile(), OPERATION_ZSTD)),
                      OPERATION_ZSTD);
          }
      }
  
      public static @Nonnull ZstdCompressorInputStream getZstdInputStream(InputStream in) throws ArchiverException {
          try {
              return new ZstdCompressorInputStream(in);
          } catch (IOException ioe) {
              throw new ArchiverException("Trouble creating Zstd compressor, invalid file ?", ioe);
          }
      }
  
      @Override
      protected void execute(String path, File outputDirectory) throws ArchiverException {
          throw new UnsupportedOperationException("Targeted execution not supported in zstd format");
      }
  }