/*
    * 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.ftp.core.command.rfc2428;
  
  import org.waarp.common.command.ReplyCode;
  import org.waarp.common.command.exception.Reply522Exception;
  import org.waarp.common.logging.WaarpLogger;
  import org.waarp.common.logging.WaarpLoggerFactory;
  import org.waarp.ftp.core.command.AbstractCommand;
  import org.waarp.ftp.core.utils.FtpChannelUtils;
  
  import java.net.InetSocketAddress;
  
  /**
   * EPRT command
   */
  public class EPRT extends AbstractCommand {
    private static final WaarpLogger logger =
        WaarpLoggerFactory.getInstance(EPRT.class);
  
    @Override
    public final void exec() throws Reply522Exception {
      // First Check if any argument
      if (!hasArg()) {
        final InetSocketAddress inetSocketAddress =
            getSession().getDataConn().getRemoteAddress();
        logger.debug("Active connect to {}", inetSocketAddress);
        getSession().getDataConn().setActive(inetSocketAddress);
        getSession().setReplyCode(ReplyCode.REPLY_200_COMMAND_OKAY,
                                  "EPRT command successful on (" +
                                  FtpChannelUtils.get2428Address(
                                      inetSocketAddress) + ')');
        return;
      }
      // Check if Inet Address is OK
  
      final InetSocketAddress inetSocketAddress =
          FtpChannelUtils.get2428InetSocketAddress(getArg());
      if (inetSocketAddress == null) {
        // ERROR
        throw new Reply522Exception("Can't get SocketAddress from " + getArg());
      }
      // No Check if the Client address is the same as given
      // OK now try to initialize connection (not open)
      logger.debug("Active connect to {}", inetSocketAddress);
      getSession().getDataConn().setActive(inetSocketAddress);
      getSession().setReplyCode(ReplyCode.REPLY_200_COMMAND_OKAY,
                                "EPRT command successful on (" +
                                FtpChannelUtils.get2428Address(
                                    inetSocketAddress) + ')');
    }
  }