import java.io.*;
import java.net.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;

/**
 *
 * @author David Dao (ddao@arsdigita.com)
 * @author Stefan Deusch (stefan@arsdigita.com)
 * @creation-date December 6, 2000
 * @cvs-id $Id: adClientSession.java,v 1.1 2002/07/09 17:35:02 rmello Exp $
 */

class adClientSession extends Thread {
    private Socket socket = null;

    private BufferedReader input = null;
    private PrintWriter output = null;
    private boolean running = true;
    private adChatDatasource datasource = null;
    private adChatServer server = null;

    private boolean authenticate_p = false;
    private boolean from_HTML_client = false;
    private String room_id = null;
    private InetAddress inet_address = null;

    public String  user_name = null;
    public String  user_id   = null;
    public boolean moderator = false;

    public adClientSession(adChatServer server, Socket socket) {
	this.datasource = server.getDatasource();
	this.socket = socket;
	this.server = server;

	inet_address = socket.getInetAddress();
    }

    public void run() {
	try {
	    input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
	    output = new PrintWriter(socket.getOutputStream(), true);

	    while(running) {
		String str = input.readLine();
		System.out.println("Receive [" + str + "]");
		if (str.equals("Bye")) {
		    running = false;
		    output.close();
		    datasource.disconnectAll();
		    // For security reason you could only shutdown server from local host.
		    // TODO: Later might be able to shutdown chat server remotely with proper user
		    // authentication.
		    if (inet_address.equals(InetAddress.getLocalHost()))
			server.shutdown();

		    return;
		}
		
		/**
		 * Authenticate user log in here. If invalid login then 
		 * close the connection immediately
		 */
		if (!authenticate_p) {
		    // Authenticate user log in.
		    adChatLoginMessage login = new adChatLoginMessage(str);

		    if (!login.isValid()) {
			// Invalid log in message.
			output.println(adChatMessage.buildBroadcastMsg(null, "Administrator", null, "Access denied."));
			output.close();
			socket.close();
			running = false;
			return;
		    } else {
			user_name = login.getUserName();
			room_id   = login.getRoomId();
			user_id   = login.getUserId();
			// Temporary.
			// TODO: Fix it.
			String tmp = login.getPassword();
			if (tmp != null && tmp.equals("T"))
			    moderator = true;
			System.out.println("User name: " + user_name + ", moderator = " + moderator);
			if (user_name.equals("AOL_READER")) {
			    datasource.addAolSession(this);
			    authenticate_p = true;
			    
			} else if (user_name.equals("AOL_WRITER")) {
			    from_HTML_client = true;
			    authenticate_p = true;
			} else if (datasource.isDuplicate(user_name, room_id)) {
			    output.println(adChatMessage.buildBroadcastMsg(null, "Administrator", null, "User already in the room."));
			    output.close();
			    running = false;
			    return;
			} else {
			    String user_list = datasource.getAppletUsers(room_id);

			    if (user_list != null) 
				output.println(user_list);

			    datasource.addSession(this, room_id);
			    datasource.broadcastAppletOnly(adChatSystemMessage.buildUserEnterMsg(user_id, user_name), room_id);
			    datasource.broadcast(adChatMessage.buildBroadcastMsg(user_id, user_name, room_id, " has entered the room."), room_id);
			    authenticate_p = true;
			}
		    }
		    continue;
		}
		System.out.println("Broadcast [" + str + "]");
		
		// Test to see if this is a log out message.
		if (adChatSimpleXMLParser.containTag(str, "system")) {
		    datasource.broadcastAppletOnly(str, room_id);
		    continue;
		}

		if (from_HTML_client) {
		    adChatMessage msg = new adChatMessage(str);
		    room_id = msg.getRoomId();
		}
		// Current assumption is all rooms are moderate.
		// TODO: Need to check if room is moderate or not.
		if (!moderator) {
		    adChatMessage msg = new adChatMessage(str);
		    str = adChatMessage.buildModerateMsg(msg.getFromUser(), msg.getRoomId(), msg.getBody());
		}
	    datasource.broadcast(str, room_id);
		    
	    }
	    socket.close();
	} catch (Exception exc) {
	    // Client connection die abnormally. Log this user off.
	}
	// Remove user from room. And broadcast message to everyone in the room.
	datasource.removeSession(this, room_id);
	datasource.broadcast(adChatMessage.buildBroadcastMsg(user_id, user_name, room_id, " has leave the room."), room_id);
    }

    public void postMessage(String msg) {
	try {
	    output.println(msg);
	} catch (Exception exc) {}
    }

    public void disconnect() {
	running = false;
	try {
	    socket.close();
	} catch (Exception exc) {}
    }
}