/*
 * Created on Apr 26, 2008
 * Created by Paul Gardner
 * 
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */


package com.aelitis.azureus.plugins.net.buddy.swt;

import java.util.*;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.plugins.utils.LocaleUtilities;
import org.gudy.azureus2.ui.swt.Messages;
import org.gudy.azureus2.ui.swt.Utils;
import org.gudy.azureus2.ui.swt.components.shell.ShellFactory;
import org.gudy.azureus2.ui.swt.mainwindow.Colors;

import com.aelitis.azureus.plugins.net.buddy.BuddyPlugin;
import com.aelitis.azureus.plugins.net.buddy.BuddyPluginAZ2;
import com.aelitis.azureus.plugins.net.buddy.BuddyPluginAZ2ChatListener;
import com.aelitis.azureus.plugins.net.buddy.BuddyPluginBuddy;

public class 
BuddyPluginViewChat 
	implements BuddyPluginAZ2ChatListener
{
	private BuddyPlugin						plugin;
	private BuddyPluginAZ2.chatInstance		chat;
	
	private LocaleUtilities		lu;
	
	private Shell 		shell;
	private StyledText 	log;
	private Table		buddy_table;
	
	private List		participants = new ArrayList();
	
	protected
	BuddyPluginViewChat(
		BuddyPlugin						_plugin,
		Display 						_display,
		BuddyPluginAZ2.chatInstance		_chat )
	{
		plugin	= _plugin;
		chat	= _chat;
		
		lu		= plugin.getPluginInterface().getUtilities().getLocaleUtilities();
		
		shell = ShellFactory.createMainShell( SWT.DIALOG_TRIM | SWT.RESIZE | SWT.MIN | SWT.MAX );

		shell.addDisposeListener(
			new DisposeListener()
			{
				public void 
				widgetDisposed(
					DisposeEvent arg0 ) 
				{
					closed();
				}
			});
		
		shell.setText( lu.getLocalisedMessageText( "azbuddy.chat.title" ));
				
		Utils.setShellIcon(shell);
		
		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		shell.setLayout(layout);
		GridData grid_data = new GridData(GridData.FILL_BOTH );
		shell.setLayoutData(grid_data);

		
		log = new StyledText(shell,SWT.READ_ONLY | SWT.V_SCROLL | SWT.BORDER | SWT.WRAP | SWT.NO_FOCUS );
		grid_data = new GridData(GridData.FILL_BOTH);
		grid_data.horizontalSpan = 1;
		grid_data.horizontalIndent = 4;
		grid_data.widthHint = 300;
		grid_data.heightHint = 400;
		log.setLayoutData(grid_data);
		log.setIndent( 4 );
		
		log.setEditable( false );

		Composite rhs = new Composite(shell, SWT.NONE);
		layout = new GridLayout();
		layout.numColumns = 1;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		rhs.setLayout(layout);
		grid_data = new GridData(GridData.FILL_BOTH );
		grid_data.widthHint = 150;
		rhs.setLayoutData(grid_data);

			// table
		
		buddy_table = new Table(rhs, SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION | SWT.VIRTUAL);

		String[] headers = { 
				"azbuddy.ui.table.name" };

		int[] sizes = { 150 };

		int[] aligns = { SWT.LEFT };

		for (int i = 0; i < headers.length; i++){

			TableColumn tc = new TableColumn(buddy_table, aligns[i]);
				
			tc.setWidth(sizes[i]);

			Messages.setLanguageText(tc, headers[i]);
		}	

	    buddy_table.setHeaderVisible(true);

	    grid_data = new GridData(GridData.FILL_BOTH);
	    grid_data.heightHint = buddy_table.getHeaderHeight() * 3;
		buddy_table.setLayoutData(grid_data);
		
		
		buddy_table.addListener(
			SWT.SetData,
			new Listener()
			{
				public void 
				handleEvent(
					Event event) 
				{
					TableItem item = (TableItem)event.item;
					
					int index = buddy_table.indexOf(item);
	
					if ( index < 0 || index >= participants.size()){
						
						return;
					}
					
					BuddyPluginAZ2.chatParticipant	participant = (BuddyPluginAZ2.chatParticipant)participants.get(index);
					
					BuddyPluginBuddy buddy = participant.getBuddy();
					
					if ( buddy == null ){
						
						item.setForeground( 0, Colors.red );
						
					}else if ( buddy.isOnline( false )){
						
						item.setForeground( 0, Colors.black );
						
					}else{
						
						item.setForeground( 0, Colors.grey );
					}
					
					item.setText(0, participant.getName());					
				}
			});
		
		
		
		
			// Text
		
		final Text text = new Text( shell, SWT.MULTI | SWT.V_SCROLL | SWT.WRAP | SWT.BORDER);
		grid_data = new GridData(GridData.FILL_HORIZONTAL );
		grid_data.horizontalSpan = 2;
		grid_data.heightHint = 50;
		text.setLayoutData(grid_data);
				
		text.addKeyListener(
			new KeyListener()
			{
				public void 
				keyPressed(
					KeyEvent e) 
				{
					if ( e.keyCode == SWT.CR ){
				
						e.doit = false;
						
						sendMessage( text.getText());
						
						text.setText( "" );
					}
				}
				
				public void 
				keyReleased(
					KeyEvent e ) 
				{
				}
			});
		
		text.setFocus();
		
		shell.addListener(
			SWT.Traverse, 
			new Listener() 
			{	
				public void 
				handleEvent(
					Event e ) 
				{
					if ( e.character == SWT.ESC){
					
						close();
				}
			}
		});
		
		BuddyPluginAZ2.chatParticipant[] existing_participants = chat.getParticipants();
		
		synchronized( participants ){
			
			participants.addAll( Arrays.asList( existing_participants ));
		}
		
		updateTable( false );
		
		BuddyPluginAZ2.chatMessage[] history = chat.getHistory();
		
		for (int i=0;i<history.length;i++){
			
			logChatMessage( history[i].getNickName(), Colors.blue, history[i].getMessage());
		}
		
		chat.addListener( this );
		
	    shell.pack();
	    Utils.createURLDropTarget(shell, text);
	    Utils.centreWindow(shell);
	    shell.open();
	}
	
	protected void
	updateTable(
		boolean	async )
	{
		if ( async ){
			
			if ( !buddy_table.isDisposed()){

				buddy_table.getDisplay().asyncExec(
						new Runnable()
						{
							public void
							run()
							{
								if ( buddy_table.isDisposed()){

									return;
								}
								
								updateTable( false );
							}
						});
			}					
		}else{
			
			buddy_table.setItemCount( participants.size());
			buddy_table.clearAll();
			buddy_table.redraw();
		}
	}
	
	protected void
	close()
	{
		shell.dispose();
	}
	
	protected void
	closed()
	{
		chat.removeListener( this );
		
		chat.destroy();
	}
	
	public void
	participantAdded(
		BuddyPluginAZ2.chatParticipant		participant )
	{
		synchronized( participants ){
			
			participants.add( participant );
		}
		
		updateTable( true );
	}
	
	public void
	participantChanged(
		BuddyPluginAZ2.chatParticipant		participant )
	{
		updateTable( true );
	}
	
	public void
	participantRemoved(
		BuddyPluginAZ2.chatParticipant		participant )
	{
		synchronized( participants ){
			
			participants.remove( participant );
		}
		
		updateTable( true );
	}
	
	protected void
	sendMessage(
		String		text )
	{
		Map	msg = new HashMap();
		
		try{
			msg.put( "line", text.getBytes( "UTF-8" ));
		
		}catch( Throwable e ){
			
			msg.put( "line", text.getBytes());
		}
		
		logChatMessage( plugin.getNickname(), Colors.green, msg );
		
		chat.sendMessage( msg );
	}
	
	public void
	messageReceived(
		final BuddyPluginAZ2.chatParticipant	participant,
		final Map								msg )
	{
		if ( !log.isDisposed()){

			log.getDisplay().asyncExec(
					new Runnable()
					{
						public void
						run()
						{
							if ( log.isDisposed()){

								return;
							}
							
							try{
								logChatMessage( participant.getName(), Colors.blue, msg );
								
							}catch( Throwable e ){
								
								Debug.printStackTrace(e);
							}
						}
					});
		}
	}
	
	protected void
	logChatMessage(
		String		buddy_name,
		Color 		colour,
		Map			map )
	{
		byte[]	line = (byte[])map.get( "line" );
		
		String msg;
		
		try{
			msg = new String( line, "UTF-8" );
			
		}catch( Throwable e ){
			
			msg = new String( line );
		}

		if ( buddy_name.length() > 32 ){
			
			buddy_name = buddy_name.substring(0,16) + "...";
		}
		
		int	start = log.getText().length();
		
		if ( msg.startsWith( "/me" )){
			
			msg = msg.substring( 3 ).trim();
			
			String	me = "* " + buddy_name + " " + msg;
			
			log.append( me  );
			
			if ( colour != Colors.black ){
				
				StyleRange styleRange = new StyleRange();
				styleRange.start = start;
				styleRange.length = me.length();
				styleRange.foreground = colour;
				log.setStyleRange(styleRange);
			}
			
			log.append( "\n" );
			
		}else{
			String says = lu.getLocalisedMessageText( "azbuddy.chat.says", new String[]{ buddy_name }) + "\n";
			
			log.append( says ); 
			
			if ( colour != Colors.black ){
				
				StyleRange styleRange = new StyleRange();
				styleRange.start = start;
				styleRange.length = says.length();
				styleRange.foreground = colour;
				log.setStyleRange(styleRange);
			}
			
			log.append( msg + "\n" ); 
		}

		log.setSelection( log.getText().length());
	}
}
