/*
 *                  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.actions;

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

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;

import fr.ens.biologie.genomique.eoulsan.Common;
import fr.ens.biologie.genomique.eoulsan.Globals;
import fr.ens.biologie.genomique.eoulsan.Main;
import fr.ens.biologie.genomique.eoulsan.util.hadoop.HadoopJarRepackager;

/**
 * This class define an action to create hadoop jar file.
 * @since 1.0
 * @author Laurent Jourdren
 */
public class CreateHadoopJarAction extends AbstractAction {

  /** Name of this action. */
  public static final String ACTION_NAME = "createhadoopjar";

  @Override
  public String getName() {
    return ACTION_NAME;
  }

  @Override
  public String getDescription() {
    return "create a jar file for hadoop with all dependencies include.";
  }

  @Override
  public boolean isCurrentArchCompatible() {

    return true;
  }

  @Override
  public void action(final List<String> arguments) {

    final Options options = makeOptions();
    final CommandLineParser parser = new GnuParser();

    int argsOptions = 0;

    try {

      // parse the command line arguments
      final CommandLine line = parser.parse(options,
          arguments.toArray(new String[arguments.size()]), true);

      // Help option
      if (line.hasOption("help")) {
        help(options);
      }

    } catch (ParseException e) {
      Common.errorExit(e,
          "Error while parsing command line arguments: " + e.getMessage());
    }

    if (arguments.size() != argsOptions) {
      help(options);
    }

    // Write log entries
    Main.getInstance().flushLog();

    try {

      HadoopJarRepackager.repack();

    } catch (IOException e) {
      Common.errorExit(e, "Error while executing "
          + Globals.APP_NAME_LOWER_CASE + ": " + e.getMessage());
    }

  }

  //
  // Command line parsing
  //

  /**
   * Create options for command line
   * @return an Options object
   */
  private static Options makeOptions() {

    // create Options object
    final Options options = new Options();

    // Help option
    options.addOption("h", "help", false, "display this help");

    return options;
  }

  /**
   * Show command line help.
   * @param options Options of the software
   */
  private static void help(final Options options) {

    // Show help message
    final HelpFormatter formatter = new HelpFormatter();
    formatter.printHelp(Globals.APP_NAME_LOWER_CASE + ".sh " + ACTION_NAME,
        options);

    Common.exit(0);
  }

}