/*
    * 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.info;
  
  import org.waarp.common.command.ReplyCode;
  import org.waarp.common.command.exception.CommandAbstractException;
  import org.waarp.ftp.core.command.AbstractCommand;
  import org.waarp.ftp.core.exception.FtpNoFileException;
  import org.waarp.ftp.core.exception.FtpNoTransferException;
  import org.waarp.ftp.core.file.FtpFile;
  import org.waarp.ftp.core.utils.FtpChannelUtils;
  
  import java.util.List;
  
  /**
   * STAT command
   */
  public class STAT extends AbstractCommand {
    @Override
    public final void exec() throws CommandAbstractException {
      final String path;
      String message;
      message = "STATUS information\nNo FtpFile currently in transfer\n";
      FtpFile file = null;
      try {
        file = getSession().getDataConn().getFtpTransferControl()
                           .getExecutingFtpTransfer().getFtpFile();
      } catch (final FtpNoFileException ignored) {
        // nothing
      } catch (final FtpNoTransferException ignored) {
        // nothing
      }
      if (file != null) {
        if (file.isInReading()) {
          message = "STATUS information\nFile currently in Retrieve transfer\n";
        } else if (file.isInWriting()) {
          message = "STATUS information\nFile currently in Store transfer\n";
        }
      }
      if (!hasArg()) {
        // Current status of connection
        message += getSession().getDataConn().getStatus();
        message += "\nControl: " +
                   FtpChannelUtils.nbCommandChannels(getConfiguration()) +
                   " Data: " +
                   FtpChannelUtils.nbDataChannels(getConfiguration()) +
                   " Binded: " + getConfiguration().getFtpInternalConfiguration()
                                                   .getNbBindedPassive();
        message += "\nEnd of Status";
        getSession().setReplyCode(ReplyCode.REPLY_211_SYSTEM_STATUS_REPLY,
                                  message);
      } else {
        // List of files from path
        path = getArg();
        final List<String> filesInfo = getSession().getDir().listFull(path, true);
        final StringBuilder builder =
            new StringBuilder().append("List of files from ").append(path)
                               .append('\n');
        for (final String newfileInfo : filesInfo) {
          builder.append(newfileInfo).append('\n');
        }
        builder.append("End of Status");
        message += builder.toString();
        getSession().setReplyCode(ReplyCode.REPLY_212_DIRECTORY_STATUS, message);
      }
    }
  
  }