/*
 *                  Eoulsan development code
 *
 * This code may be freely distributed and modified under the
 * terms of the GNU Lesser General Public License version 2.1 or
 * later and CeCILL-C. This should be distributed with the code.
 * If you do not have a copy, see:
 *
 *      http://www.gnu.org/licenses/lgpl-2.1.txt
 *      http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.txt
 *
 * Copyright for this code is held jointly by the Genomic platform
 * of the Institut de Biologie de l'École normale supérieure and
 * the individual authors. These should be listed in @author doc
 * comments.
 *
 * For more information on the Eoulsan project and its aims,
 * or to join the Eoulsan Google group, visit the home page
 * at:
 *
 *      http://outils.genomique.biologie.ens.fr/eoulsan
 *
 */

package fr.ens.biologie.genomique.eoulsan.data.protocols;

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;

import fr.ens.biologie.genomique.eoulsan.data.DataFile;
import fr.ens.biologie.genomique.eoulsan.data.DataFileMetadata;
import fr.ens.biologie.genomique.eoulsan.util.FileUtils;

/**
 * This class is an abstract Protocol class that implements generic
 * getIn/OutputStream with length.
 * @since 1.0
 * @author Laurent Jourdren
 */
abstract class AbstractDataProtocol implements DataProtocol {

  @Override
  public String getSourceFilename(final String source) {

    final int lastSlashPos = source.lastIndexOf(DataFile.separatorChar);

    if (lastSlashPos == -1) {
      return source;
    }

    return source.substring(lastSlashPos + 1);
  }

  @Override
  public DataFile getDataFileParent(final DataFile src) {

    if (src == null) {
      return null;
    }

    final String source = src.getSource();
    final int nameLen = src.getName().length();
    final int sourceLen = source.length();

    final int parentSrcLen = sourceLen - nameLen - 1;

    return new DataFile(
        source.substring(0, parentSrcLen < 0 ? 0 : parentSrcLen));
  }

  @Override
  public OutputStream putData(final DataFile src, final DataFileMetadata md)
      throws IOException {

    if (!canWrite()) {
      throw new IOException("Writing is not allowed for the source: " + src);
    }

    return putData(src);
  }

  @Override
  public void putData(final DataFile src, final DataFile dest)
      throws IOException {

    if (src == null) {
      throw new NullPointerException("The source of the data to put is null");
    }

    if (dest == null) {
      throw new NullPointerException(
          "The destination of the data to put is null");
    }

    final DataFileMetadata mdSrc = src.getMetaData();

    FileUtils.copy(src.getProtocol().getData(src),
        dest.getProtocol().putData(dest, mdSrc));
  }

  @Override
  public File getSourceAsFile(final DataFile src) {

    if (src == null || src.getSource() == null) {
      throw new NullPointerException("The source is null.");
    }

    return null;
  }

  @Override
  public void mkdir(final DataFile dir) throws IOException {

    throw new IOException("The mkdir() method is not supported by the "
        + getName() + " protocol");

  }

  @Override
  public void mkdirs(final DataFile dir) throws IOException {

    throw new IOException("The mkdir() method is not supported by the "
        + getName() + " protocol");
  }

  @Override
  public boolean canMkdir() {

    return false;
  }

  @Override
  public void symlink(final DataFile target, final DataFile link)
      throws IOException {

    throw new IOException("The symlink() method is not supported by the "
        + getName() + " protocol");
  }

  @Override
  public boolean canSymlink() {

    return false;
  }

  @Override
  public void delete(final DataFile file, final boolean recursive)
      throws IOException {

    throw new IOException("The delete() method is not supported by the "
        + getName() + " protocol");
  }

  @Override
  public boolean canDelete() {

    return false;
  }

  @Override
  public List<DataFile> list(final DataFile file) throws IOException {

    throw new IOException(
        "The list() method is not supported by the " + getName() + " protocol");
  }

  @Override
  public boolean canList() {

    return false;
  }

  @Override
  public boolean canRename() {

    return false;
  }

  @Override
  public void rename(final DataFile oldName, final DataFile newName)
      throws IOException {

    throw new IOException("The rename() method is not supported by the "
        + getName() + " protocol");
  }

}