import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.util.Hashtable;
import java.util.Vector;
import lava.net.common.UNL;
import lava.net.psyc.PSYCDeliveryException;
import lava.net.psyc.PSYCMessageCenter;
import lava.net.psyc.UNI;
import lava.net.psyc.packages.Echo;
import lava.net.psyc.packages.Trace;
import lava.net.psyc.packages.Conferencing;
import lava.net.psyc.packages.ConferencingListener;
import lava.net.psyc.packages.LinkPeer;
import lava.net.psyc.packages.LinkPeerListener;

/**
 *
 **/
public class PSYCClientAWT extends Panel implements WindowListener, //
KeyListener, FocusListener, ActionListener, //
ConferencingListener, LinkPeerListener
{
   /**
    *
    **/
   public String prefix = "*** ";

   /**
    *
    **/
   public String i_say_prefix = "> ";

   /**
    *
    **/
   public String public_open = "<";

   /**
    *
    **/
   public String public_close = "> ";

   /**
    *
    **/
   public String pager_open = "[";

   /**
    *
    **/
   public String pager_close = "] ";

   /**
    *
    **/
   public String private_open = "*";

   /**
    *
    **/
   public String private_close = "* ";

   /**
    *
    **/
   //private String place = "psyc://psyc.tu-ilmenau.de/";
   private String place = "psyc://xanadu.lava.de/myPlace";

   /**
    *
    **/
   private UNL place_unl = null;

   /**
    *
    **/
   private String context = null;

   /**
    *
    **/
   private PSYCMessageCenter center = null;

   /**
    *
    **/
   private Conferencing conf = null;

   /**
    *
    **/
   private LinkPeer link = null;

   /**
    *
    **/
   private String base = null;

   /**
    *
    **/
   private Frame frame = new Frame();

   /**
    *
    **/
   private TextArea output = null;

   /**
    *
    **/
   private TextField input = null;

   /**
    *
    **/
   private Vector history = new Vector();

   /**
    *
    **/
   private int historyPosition = -1;

   /**
    *
    **/
   public int historyMax = 30;

   /**
    *
    **/
   public boolean markHistory = false;

   /**
    *
    **/
   public PSYCClientAWT()
   {
      this (null);
   }

   /**
    *
    **/
   public PSYCClientAWT(String base)
   {
      super();
      this.base = base;
      frame.addWindowListener(this);
      frame.setTitle("PSYC Chat Window");
      frame.add(this);
      setLayout(new BorderLayout());
      add(output = new TextArea(null,24,80,//
      TextArea.SCROLLBARS_VERTICAL_ONLY),BorderLayout.CENTER);
      output.setEditable(false);
      output.addFocusListener(this);
      add(input = new TextField(),BorderLayout.SOUTH);
      input.addKeyListener(this);
      input.addActionListener(this);
      //frame.setSize(300,200);
      frame.pack();
      frame.show();
      center = new PSYCMessageCenter();
      center.setContentType(null,"text/plain");
      center.addPackage(new Echo());
      center.addPackage(new Trace());
      center.addPackage(conf = new Conferencing(this));
      conf.acceptPlace(place_unl = new UNL(place));
      center.addPackage(link = new LinkPeer(this));
      try
      {
         link.link(place_unl);
      }
      catch(PSYCDeliveryException e)
      {
         serverUnlinked(place_unl,null);
      }
   }

   /**
    *
    **/
   public Dimension getPreferredSize()
   {
      Dimension d = output.getPreferredSize();
      Dimension d1 = input.getPreferredSize();
      if(d.width > d.width)
         d.width = d1.width + 10;
      d.height += d1.height + 10;
      return d;
   }

   /**
    *
    **/
   public void focusGained(FocusEvent e)
   {
      output.transferFocus();
   }

   /**
    *
    **/
   public void focusLost(FocusEvent e)
   {
   }

   /**
    *
    **/
   public void keyTyped(KeyEvent e)
   {
   }

   /**
    *
    **/
   public void keyPressed(KeyEvent e)
   {
      int s;
      switch(e.getKeyCode())
      {
         case KeyEvent.VK_UP:
            s = history.size();
            if(--historyPosition < 0)
               historyPosition = s - 1;
            if(historyPosition < s)
            {
               input.setText((String)history.elementAt(historyPosition));
               if(markHistory)
                  input.selectAll();
            }
            break;
         case KeyEvent.VK_DOWN:
            s = history.size();
            if(++historyPosition >= s)
               historyPosition = 0;
            if(historyPosition < s)
            {
               input.setText((String)history.elementAt(historyPosition));
               if(markHistory)
                  input.selectAll();
            }
            break;
      }
   }

   /**
    *
    **/
   public void keyReleased(KeyEvent e)
   {
   }

   /**
    *
    **/
   public void actionPerformed(ActionEvent e)
   {
      String text = input.getText();
      historyPosition = -1;
      if(history.size() >= historyMax)
         history.removeElementAt(0);
      history.addElement(text);
      output.append(i_say_prefix + text);
      output.append("\n");
      conf.send(context,text);
      input.setText(null);
   }

   /**
    *
    **/
   public void windowOpened(WindowEvent e)
   {
   }

   /**
    *
    **/
   public void windowClosing(WindowEvent e)
   {
      center.close();
      if(base != null)
         frame.dispose();
      else
         System.exit(0);
   }

   /**
    *
    **/
   public void windowClosed(WindowEvent e)
   {
   }

   /**
    *
    **/
   public void windowIconified(WindowEvent e)
   {
   }

   /**
    *
    **/
   public void windowDeiconified(WindowEvent e)
   {
   }

   /**
    *
    **/
   public void windowActivated(WindowEvent e)
   {
   }

   /**
    *
    **/
   public void windowDeactivated(WindowEvent e)
   {
   }

   /**
    *
    **/
   public void contextIntroduced(UNL source, String context)
   {
   }

   /**
    *
    **/
   public void placeEntered(String context, UNI user)
   {
      this.context = context;
      output.append(prefix + user + " entered place\n");
   }

   /**
    *
    **/
   public void placeLeft(String context, UNI user)
   {
      output.append(prefix + user + " left place\n");
   }

   /**
    *
    **/
   public void placeDeleted(String context)
   {
      windowClosing(new WindowEvent(frame,WindowEvent.WINDOW_CLOSING));
   }

   /**
    *
    **/
   public void memberChanged(String context, UNI user, UNL multicaster, //
   Hashtable locations, boolean speak, boolean listen, boolean authority)
   {
   }

   /**
    *
    **/
   public void placePropertiesChanged(String context, //
   boolean allowExternals, //
   boolean speakersAddSpeakers, boolean speakersAddListeners, //
   boolean listenersAddListeners, //
   boolean speakersRemoveSpeakers, boolean speakersRemoveListeners)
   {
   }

   /**
    *
    **/
   public void conversationPublic(String context, UNI user, String message)
   {
      output.append(public_open + user + public_close + message + "\n");
   }

   /**
    *
    **/
   public void conversationPager(UNL user, String message)
   {
      output.append(pager_open + user + pager_close + message + "\n");
   }

   /**
    *
    **/
   public void conversationPrivate(UNL user, String message)
   {
      output.append(private_open + user + private_close + message + "\n");
   }

   /**
    *
    **/
   public void serverLinked(UNL server, String body)
   {
      output.append(prefix + server + " connected" + //
      (body == null || body.length() <= 0 ? "." : ": " + body) + "\n");
   }

   /**
    *
    **/
   public void serverUnlinked(UNL server, String body)
   {
      output.append(prefix + server + " disconnected" + //
      (body == null || body.length() <= 0 ? "." : ": " + body) + "\n");
      windowClosing(new WindowEvent(frame,WindowEvent.WINDOW_CLOSING));
   }

   /**
    *
    **/
   final public static void main(String args[])
   {
      new PSYCClientAWT();
   }

}