/*
    * 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.gateway.ftp.service;
  
  import org.waarp.common.future.WaarpFuture;
  import org.waarp.common.logging.WaarpLogger;
  import org.waarp.common.logging.WaarpLoggerFactory;
  import org.waarp.common.service.EngineAbstract;
  import org.waarp.common.utility.SystemPropertyUtil;
  import org.waarp.ftp.core.config.FtpConfiguration;
  import org.waarp.ftp.core.utils.FtpChannelUtils;
  import org.waarp.gateway.ftp.ExecGatewayFtpServer;
  import org.waarp.gateway.ftp.config.FileBasedConfiguration;
  
  /**
   * Engine used to start and stop the real Gateway Ftp service
   */
  public class FtpEngine extends EngineAbstract {
    /**
     * Internal Logger
     */
    private static final WaarpLogger logger =
        WaarpLoggerFactory.getLogger(FtpEngine.class);
  
    public static final WaarpFuture closeFuture = new WaarpFuture(true);
  
    public static final String CONFIGFILE = "org.waarp.gateway.ftp.config.file";
  
    public static final String R66CONFIGFILE = "org.waarp.r66.config.file";
  
    @Override
    public final void run() {
      final String ftpfile = SystemPropertyUtil.get(CONFIGFILE);
      final String r66file = SystemPropertyUtil.get(R66CONFIGFILE);
      if (ftpfile == null) {
        logger.error("Cannot find " + CONFIGFILE + " parameter");
        shutdown();
        return;
      }
      try {
        if (!ExecGatewayFtpServer.initialize(ftpfile, r66file)) {
          logger.error("Cannot start Gateway FTP");
          shutdown();
          return;
        }
      } catch (final Throwable e) {
        logger.error("Cannot start Gateway FTP", e);
        shutdown();
        return;
      }
      logger.warn("Service started with " + ftpfile);
    }
  
    private static void exit(final FtpConfiguration configuration) {
      final FtpChannelUtils util = new FtpChannelUtils(configuration);
      util.run();
    }
  
    @Override
    public final void shutdown() {
      exit(FileBasedConfiguration.fileBasedConfiguration);
      closeFuture.setSuccess();
      logger.info("Service stopped");
    }
  
    @Override
    public final boolean isShutdown() {
      return closeFuture.isDone();
    }
  
    @Override
    public final boolean waitShutdown() {
      closeFuture.awaitOrInterruptible();
      return closeFuture.isSuccess();
    }
  }