/*
 * Copyright (c) 2003,2007 Declarative Engineering LLC.
 * All rights reserved.  This program and the accompanying materials
 * are made available under the terms of the Declarative Engineering LLC
 * verson 1 which accompanies this distribution, and is available at
 * http://declarativeengineering.com/legal/DE_Developer_License_v1.txt
 */
package com.foundation.tcv.client.controller;

import com.common.util.*;
import com.common.debug.*;
import com.foundation.controller.DecorationManager;

public class ClientController extends AbstractController {
	private static ClientController singleton = new ClientController();
	private SessionController sessionController = null;  //TODO: Allow multiple session controllers.//
/**
 * ClientController constructor.
 */
private ClientController() {
	super();
}//ClientController()//
/**
 * Gets the one and only instance of this class.
 * @return The only object of this type.
 */
public static ClientController getSingleton() {
	return singleton;
}//getSingleton()//
/**
 * Gets the session controller.
 * <p>TODO: Replace this with a collection of session controllers, one for each server we connect to.</p>
 * @return The one and only session controller.
 */
public SessionController getSessionController() {
	return sessionController;
}//getSessionController()//
/**
 * Creates a connection to a server and opens the initial view.
 * @param serverAddresses The addresses (Address instances) to use while connecting to the server.
 * @param versionHandler The handler that is called if the server requires a different client version.  The handler should be capable of downloading the new version.
 * @param eventSystem An object capable of processing events on the view system's event thread.
 * @return Whether the server was contacted and accepted the connection.  This method will not throw exceptions.
 */
public boolean createSession(IList serverAddresses, IVersionHandler versionHandler, IViewSystem eventSystem) {
	try {
		sessionController = new SessionController(eventSystem);
		
		if(!sessionController.initialize(this, serverAddresses, versionHandler)) {
			Debug.log("Failed to connect to the server and initialize the first view.");
			sessionController = null;
		}//if//
	}//try//
	catch(Throwable e) {
		Debug.log(e);
	}//catch//
	
	return sessionController != null;
}//connect()//
/**
 * Forces the client to close all connections and cleanup.
 */
public void shutdown() {
	if(sessionController != null) {
		sessionController.shutdown();
	}//if//
	
	((com.foundation.tcv.client.application.AbstractClientApplication) getApplication()).shutdown();
}//shutdown()//
/**
 * Destroys the session and exits the application if all sessions have been destroyed.
 * @param sessionController The removed session's controller.
 */
public void destroySession(SessionController sessionController) {
	this.sessionController = null;
	shutdown();  //TODO: When allowing multiple sessions we should only shutdown if all sessions are destroyed.  We should also synchronize this.//
}//destroySession()//
/* (non-Javadoc)
 * @see com.foundation.controller.IController#getDecorationManager()
 */
public DecorationManager getDecorationManager() {
	return null;
}//getDecorationManager()//
}//ClientController//