import java.awt.*;
import java.applet.*;
import java.net.*;
import java.io.*;
import java.awt.event.*;
import java.lang.reflect.*;
import com.ms.security.*;

public class ChatAdapter extends Applet
{
  String mStrLabel=new String();
  IOManager mIOManager=new IOManager();
  AdviseThread mAdviseThread=null;
  GUIControls mGUIControls=null;
  
  public void init()
  { 
		setFont(new Font("Courier New",Font.BOLD,12));
		setBackground(Color.lightGray);
    mGUIControls=new GUIControls(this);
    try{if(Class.forName("com.ms.security.PolicyEngine") != null)PolicyEngine.assertPermission(PermissionID.NETIO);}
    catch(Throwable cnfe){;}
    mGUIControls.status().setText("Not connected.");
  }
  public void stop()
  {
    mAdviseThread.isCancelled(true);
    mIOManager.shutdown();
  }
  public void destroy()
  {
  }
  public void paint(Graphics graphics)
  {
  }
  public void showUsers()
  {
    StringArray userList=new StringArray();
    mIOManager.who(userList);
    if(0==userList.size())mGUIControls.list().addItem(new String("There are no users logged in at this time."));
    for(int index=0;index<userList.size();index++)
    {
      mGUIControls.list().addItem(new String("User;'")+ userList.getAt(index)+new String("' is here."));
     }
  }
	public boolean action(Event event,Object object)
	{
	  if(mGUIControls.connect()==event.target)
	  {
	    StringArray receiveStrings=new StringArray();
	    String strResponse=new String();
      String strIPAddress=null;
      String strAdviseAddress=null;
      String strPort=null;

      strAdviseAddress=new String(getParameter("advise"));
      if(null==strAdviseAddress||0==strAdviseAddress.length())strAdviseAddress=new String(AdviseThread.getAdviseAddress());
      strIPAddress=new String(getParameter("ip"));      
      if(null==strIPAddress||0==strIPAddress.length())strIPAddress=new String("");
      strPort=new String(getParameter("port"));
      if(null==strPort||0==strPort.length())strPort=new String("");
      if(0==mGUIControls.userName().getText().length()){mGUIControls.status().setText("'User Name' cannot be empty.");return false;}
      if(0!=strIPAddress.length())mGUIControls.status().setText(new String("trying '")+strIPAddress+new String("'"));
      else mGUIControls.status().setText(new String("trying 'localhost'"));
      if(0==strPort.length())strPort="100";
      mIOManager.connect(strIPAddress,Integer.parseInt(strPort));
      if(!mIOManager.isConnected()){mGUIControls.status().setText("Failed to connect to host.");return true;}
      else mGUIControls.status().setText("Connection established.");
      mAdviseThread=new AdviseThread(mGUIControls.list());
      mAdviseThread.start();
      mGUIControls.status().setText(new String("Advising server of talkback '")+strAdviseAddress+new String("'"));
      mIOManager.advise(strAdviseAddress,mAdviseThread.AdvisePort);
      mGUIControls.status().setText("Logging into server...");
      if(!mIOManager.user(mGUIControls.userName().getText(),receiveStrings))
      {
        mGUIControls.status().setText("Login failed");
        for(int index=0;index<receiveStrings.size();index++)mGUIControls.list().addItem(receiveStrings.getAt(index));
        mAdviseThread.isCancelled(true);
        mIOManager.shutdown();
        return true;
      }
      mStrLabel=mIOManager.version();
      mGUIControls.connect().setEnabled(false);
      mGUIControls.disconnect().setEnabled(true);
      mGUIControls.send().setEnabled(true);
      mGUIControls.status().setText("Connected.");
      mGUIControls.list().removeAll();
      showUsers();
	  }
	  else if(mGUIControls.disconnect()==event.target)
	  {
	    mAdviseThread.isCancelled(true);
      mIOManager.shutdown();
      mGUIControls.connect().setEnabled(true);
      mGUIControls.disconnect().setEnabled(false);
      mGUIControls.send().setEnabled(false);
      mGUIControls.status().setText("Not connected.");
	  }
	  else if(mGUIControls.send()==event.target&&mIOManager.isConnected())
	  {
	    mIOManager.talk(mGUIControls.text().getText());
	    mGUIControls.status().setText("Message sent.");
	    mGUIControls.text().setText("");
	  }
	  return true;
	}
}