/*
    * This file is part of Waarp Project (named also Waarp or GG).
    *
    *  Copyright (c) 2019, Waarp SAS, and individual contributors by the @author
    *  tags. See the COPYRIGHT.txt in the distribution for a full listing of
    * individual contributors.
    *
    *  All Waarp Project is free software: you can redistribute it and/or
    * modify it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or (at your
   * option) any later version.
   *
   * Waarp is distributed in the hope that it will be useful, but WITHOUT ANY
   * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License along with
   * Waarp . If not, see <http://www.gnu.org/licenses/>.
   */
  package org.waarp.openr66.context.task.javatask;
  
  import org.waarp.common.database.exception.WaarpDatabaseException;
  import org.waarp.common.guid.GUID;
  import org.waarp.common.logging.WaarpLogger;
  import org.waarp.common.logging.WaarpLoggerFactory;
  import org.waarp.openr66.context.task.AbstractExecJavaTask;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * Add an UUID in the TransferInformation to the current Task.</br>
   * This should be called on caller side in pre-task since the transfer
   * information will be transfered just
   * after.</br>
   * The second argument is -1 = added in front, +1 = added at last, default
   * being
   * -1.</br>
   * The third argument, optional, is "-format" followed by a string containing
   * "#UUID#" to be replaced by the
   * uuid and starting with - or +, meaning this will be added at the beginning
   * or
   * the end of the generated new
   * string. Default is equivalent to "-format -##UUID##". </br>
   * To be called as: <task><type>EXECJAVA</type><path>org.waarp.openr66.context.task.javatask.AddUuidJavaTask
   * [-format (-/+)##UUID##]</path></task>
   */
  public class AddUuidJavaTask extends AbstractExecJavaTask {
    /**
     * Internal Logger
     */
    private static final WaarpLogger logger =
        WaarpLoggerFactory.getLogger(AddUuidJavaTask.class);
    private static final String S_UUID = "#UUID#";
    private static final Pattern UUID_COMPILE =
        Pattern.compile(S_UUID, Pattern.LITERAL);
  
    @Override
    public final void run() {
      logger.debug("{}", this);
      final GUID uuid = new GUID();
      final String[] args = BLANK.split(fullarg);
      final String fileInfo;
      String format = "-##UUID##";
      int way = -1;
      for (int i = 0; i < args.length; i++) {
        if ("-format".equalsIgnoreCase(args[i])) {
          format = args[i + 1];
          if (format.charAt(0) == '-') {
            way = -1;
            format = format.substring(1);
          } else if (format.charAt(0) == '+') {
            way = 1;
            format = format.substring(1);
          }
          i++;
        }
      }
      logger.debug("Replace UUID in {} way: {}", format, way);
      if (format.isEmpty()) {
        fileInfo = session.getRunner().getFileInformation();
      } else {
        if (way < 0) {
          fileInfo = UUID_COMPILE.matcher(format).replaceAll(
              Matcher.quoteReplacement(uuid.toString())) + ' ' +
                     session.getRunner().getFileInformation();
        } else {
          fileInfo = session.getRunner().getFileInformation() + ' ' +
                     UUID_COMPILE.matcher(format).replaceAll(
                         Matcher.quoteReplacement(uuid.toString()));
        }
      }
      session.getRunner().setFileInformation(fileInfo);
      session.getRunner().addToTransferMap("uuid", uuid.toString());
      try {
        session.getRunner().update();
      } catch (final WaarpDatabaseException e) {
        logger.error("UUID cannot be saved to fileInformation:" + fileInfo);
        status = 2;
       return;
     }
     logger.debug("UUID saved to fileInformation: {}", fileInfo);
     status = 0;
   }
 }