/*
 *  SSHTools - Java SSH2 API
 *
 *  Copyright (C) 2002-2003 Lee David Painter and Contributors.
 *
 *  Contributions made by:
 *
 *  Brett Smith
 *  Richard Pernavas
 *  Erwin Bolwidt
 *
 *  This program 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 2
 *  of the License, or (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package com.sshtools.common.ui;

import java.io.IOException;
import java.awt.BorderLayout;
import com.sshtools.common.configuration.SshToolsConnectionProfile;
import com.sshtools.j2ssh.SftpClient;
import com.sshtools.j2ssh.SshClient;
import com.sshtools.j2ssh.SshEventAdapter;
import com.sshtools.j2ssh.connection.Channel;
import com.sshtools.j2ssh.connection.ChannelFactory;
import com.sshtools.j2ssh.forwarding.ForwardingClient;
import com.sshtools.j2ssh.session.SessionChannelClient;

/**
 * <p>This frame class embeds a SessionProvider and manages the connection
 * on behalf of the caller. To invoke a session provider from an external
 * application is a straight forward procedure. Assuming that the connection
 * has already been established [see SshClient] you can invoke a frame using
 * the following code:</p>
 *
 * <blockquote><pre>
 * // Create an SshClient connection
 * SshClient ssh = new SshClient();
 *
 * // Connection code goes here - see SshClient for more details
 *
 * SessionProviderFrame frame = new SessionProviderFrame(null,
 *                            new SshToolsConnectionProfile(),
 *                                                        ssh,
 *          SessionProviderFactory.getInstance().getProvider("sshterm"));
 * frame.pack();
 * frame.show();
 * </pre></blockquote>
 *
 * @author Lee David Painter
 * @version $Id: SessionProviderInternalFrame.java,v 1.3 2003/09/24 11:26:32 martianx Exp $
 */
public class SessionProviderInternalFrame
    extends SshToolsApplicationInternalFrame
    implements SessionManager {
  //  Private instance variables
  private SshToolsApplicationSessionPanel panel;
  private SessionProvider provider;
  private SshToolsConnectionProfile profile;
  private SshClient ssh;
  private boolean disconnectOnClose = false;
  /**
   * Construct a new Session Provider frame.
   *
   * @param app The SshToolsApplication instance, can be null
   * @param profile The profile of the connection
   * @param ssh the client connection
   * @param provider the provider instance
   * @throws IOException
   * @throws SshToolsApplicationException
   */
  public SessionProviderInternalFrame(SshToolsConnectionProfile profile,
                                      SshClient ssh,
                                      SessionProvider provider) throws
      IOException, SshToolsApplicationException {
    try {
      this.provider = provider;
      this.ssh = ssh;
      this.profile = profile;
      //setIconImage(provider.getSmallIcon().getImage());
      setTitle(provider.getName() + " - " +
               ssh.getConnectionProperties().getHost());
      getContentPane().setLayout(new BorderLayout());
      getContentPane().add(panel = (SshToolsApplicationSessionPanel)
                           provider.getProviderClass().
                           newInstance(), BorderLayout.CENTER);
      return;
    }
    catch (IllegalAccessException ex) {
    }
    catch (InstantiationException ex) {
    }
    throw new SshToolsApplicationException("Failed to create instance of "
                                           +
                                           provider.getProviderClass().getName());
  }

  /**
   * Initialize the frame and open the remote session
   * @param app the application object, can be null
   * @return
   * @throws IOException
   * @throws SshToolsApplicationException
   */
  public boolean initFrame(SshToolsApplication app) throws IOException,
      SshToolsApplicationException {
    panel.init(app);
    init(app, panel);
    pack();
    return panel.openSession(this, profile);
  }

  /**
   * Get the attached session provider panel.
   * @return
   */
  public SshToolsApplicationSessionPanel getSessionPanel() {
    return panel;
  }

  /**
   * Called by the application framework when testing exit state
   * @return
   */
  public boolean canExit() {
    return panel.canClose();
  }

  /**
       * Called by the framework when exiting. Can also be called to close the session.
   */
  public void exit() {
    panel.close();
    dispose();
  }

  /**
   * Implementation of the SessionManager method, simply calls the SshClient
   * openSession method.
   * @return
   * @throws IOException
   */
  public SessionChannelClient openSession() throws IOException {
    return ssh.openSessionChannel();
  }

  /**
   * Returns the guessed EOL setting of the remote computer
   * @return
   */
  public int getRemoteEOL() {
    return ssh.getRemoteEOL();
  }

  /**
       * Implementation of the SessionManager method, this does nothing. Overide this
       * method to provide additional functionality to save changes made by the session
   * to the profile.
   *
   * @param profile
   */
  public void applyProfileChanges(SshToolsConnectionProfile profile) {
  }

  /**
       * Implementation of the SessionManager method, this simply calls the SshClient
   * method openSftpClient.
   * @return
   * @throws IOException
   */
  public SftpClient openSftpClient() throws IOException {
    return ssh.openSftpClient();
  }

  /**
       * Implementation of the SessionManager method, this simply calls the SshClient
   * method openChannel.
   * @param channel
   * @return
   * @throws IOException
   */
  public boolean openChannel(Channel channel) throws IOException {
    return ssh.openChannel(channel);
  }

  /**
       * Implementation of the SessionManager method, this simply calls the SshClient
   * method isConnected.
   * @return
   */
  public boolean isConnected() {
    return ssh.isConnected();
  }

  /**
   * When the session closes, should the connection be disconnected?
   * @param disconnectOnClose
   */
  public void setDisconnectOnClose(boolean disconnectOnClose) {
    this.disconnectOnClose = disconnectOnClose;
  }

  /**
   * Implementation of the SessionManager method, this simply returns false.
   * Overide to change this behaviour
   *
   * @return
   */
  public boolean requestDisconnect() {
    return disconnectOnClose;
  }

  /**
   * Implementation of the SessionManager method, simply calls the SshClient
   * method getForwardingClient.
   * @return
   */
  public ForwardingClient getForwardingClient() {
    return ssh.getForwardingClient();
  }

  /**
   * Implementation of the SessionManager method, simply calls the SshClient
   * method sendGlobalRequest.
   * @param requestname
   * @param wantreply
   * @param requestdata
   * @return
   * @throws IOException
   */
  public byte[] sendGlobalRequest(String requestname, boolean wantreply,
                                  byte[] requestdata) throws IOException {
    return ssh.sendGlobalRequest(requestname, wantreply, requestdata);
  }

  /**
   * Implementation of the SessionManager method, simply calls the SshClient
   * method addEventHandler.
   * @param eventHandler
   */
  public void addEventHandler(SshEventAdapter eventHandler) {
    ssh.addEventHandler(eventHandler);
  }

  /**
   * Implemenation of the SessionManager method, simply calls the SshClient
   * method getServerId.
   * @return
   */
  public String getServerId() {
    return ssh.getServerId();
  }

  /**
   * Implemenation of the SessionManager method, simply calls the SshClient
   * method allowChannelOpen.
   * @param channelType
   * @param cf
   * @throws IOException
   */
  public void allowChannelOpen(String channelType, ChannelFactory cf) throws
      IOException {
    ssh.allowChannelOpen(channelType, cf);
  }

  /**
   * Gets the profile currently attached to the frame.
   * @return
   */
  public SshToolsConnectionProfile getProfile() {
    return profile;
  }
}