/**
 * <PRE>
 * OLAT - Online Learning and Training
 * http://www.olat.org
 * 
 * This software is protected by the OLAT software license. 
 * Use is subject to license terms.
 * See LICENSE.TXT in this distribution for details.
 * 
 * Copyright (c) 2003 OLAT Zentrum, University of Zurich, Switzerland.
 * All rights reserved.
 * </PRE>
 * Description:<BR/>
 * TODO: Class Description for SmackInstantMessagingImpl
 * 
 * <P/>
 * @version $Revision: 1.20 $
 * Initial Date:  18.01.2005
 * Last modified: $Date: 2005/02/02 14:40:03 $
 *
 * @author guido 
 */
package org.olat.instantMessaging;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.log4j.Logger;
import org.jivesoftware.smack.packet.Presence;
import org.olat.basesecurity.Manager;
import org.olat.basesecurity.ManagerFactory;
import org.olat.basesecurity.SecurityGroup;
import org.olat.group.BusinessGroup;
import org.olat.gui.UserRequest;
import org.olat.gui.control.Controller;
import org.olat.gui.control.WindowControl;
import org.olat.instantMessaging.ui.ConferenceRoomController;
import org.olat.instantMessaging.ui.FlashClientController;
import org.olat.instantMessaging.ui.InstantMessagingClientController;
import org.olat.resource.OresHelper;
import org.olat.util.Util;

/**
 *  
 */
public class SmackInstantMessagingImpl implements InstantMessaging {

    private final String PROVIDER_CHATROOMS="CHATROOM";
    private final SynchronizeBuddygroupsOverHTTP buddyListSync = new SynchronizeBuddygroupsOverHTTP();
    private static final Logger log = Util.getLogger(SmackInstantMessagingImpl.class);
    
	/**
     * for clarity since needed for dynamic class loading
     */
    public SmackInstantMessagingImpl() {
        super();
    }

    /**
     * 
     * 
     * @see org.olat.instantMessaging.InstantMessaging#initAtStartup(org.olat.instantMessaging.InfoHandler)
     */
    public void initAtStartup(InfoHandler infohandler) {
        
    	//buddyListSync.addUsersToSharedGroup();
    }
    
    /**
	 * @see org.olat.instantMessaging.InstantMessaging#syncAtStartup(java.util.List)
	 */
	public void syncAtStartup(List groups) {
		// TODO Auto-generated method stub
		
	}

    /**
     * 
     * 
     * @see org.olat.instantMessaging.InstantMessaging#createClientController(org.olat.gui.UserRequest,
     *      org.olat.gui.control.WindowControl)
     */
    public Controller createClientController(UserRequest ureq,
            WindowControl wControl) {
        return new InstantMessagingClientController(ureq);
    }

    /**
     * 
     * 
     * @see org.olat.instantMessaging.InstantMessaging#createChatRoomLinkController(boolean,
     *      java.lang.String, java.lang.String, org.olat.gui.UserRequest,
     *      org.olat.gui.control.WindowControl)
     */
    public Controller createChatRoomLinkController(boolean passwordProtected,
        String resourceId, String chatRoomName, UserRequest ureq,
        WindowControl wControl) {
    	if(passwordProtected){
    		//TODO:gs save password in database for later usage
    		//Authentication auth = ManagerFactory.getManager()
			//.findAuthentication(identity, PROVIDER_CHATROOMS);
//    		String pw = RandomStringUtils.randomAlphanumeric(6);
//    		ConferenceRoomManager.getInstance().createChatRoom(resourceId, chatRoomName, pw);
    	}else{
    		//ConferenceRoomManager.getInstance().createChatRoom(resourceId, chatRoomName);
		}
        return new ConferenceRoomController(ureq, resourceId, chatRoomName);
    }

    /**
     * @see org.olat.instantMessaging.InstantMessaging#createFlashClientController(org.olat.gui.UserRequest,
     *      org.olat.gui.control.WindowControl, String, String)
     */
    public Controller createFlashClientController(UserRequest ureq,
            WindowControl wControl, String chatPartner, String chatRoom) {
        String username = ureq.getIdentity().getName();
        return new FlashClientController(ureq, username, ClientManager
                .getInstance().getInstantMessagingClient(username)
                .getPassword(), chatPartner, chatRoom);

    }

    /**
     * 
     * 
     * @see org.olat.instantMessaging.InstantMessaging#addUserToFriendsRoster(org.olat.instantMessaging.SharedRosterGroup,
     *      java.lang.String)
     */
    public void addUserToFriendsRoster(SharedRosterGroup group, String username) {
        //buddyListSync.createSharedGroup();
        //buddyListSync.addUserToSharedGroup(group.getId(),username);

    }
    /**
     * 
     * 
     * @param groupOwner username of the user creating or adding new users
     * @param groupId
     * @param groupname
     * @param username
     * @see org.olat.instantMessaging.InstantMessaging#addUserToFriendsRoster(java.lang.String,
     *      java.lang.String)
     */
    public void addUserToFriendsRoster(String groupOwner, String groupId, String groupname, String username) {
        //we do not check wether a group already exists, we create it each time
        buddyListSync.createSharedGroup(groupId, groupname, new String[]{groupOwner});
        buddyListSync.addUserToSharedGroup(groupId,username);

    }

    /**
     * 
     * 
     * @see org.olat.instantMessaging.InstantMessaging#removeUserFromFriendsRoster(java.lang.String,
     *      java.lang.String)
     */
    public void removeUserFromFriendsRoster(String groupId, String username) {
        buddyListSync.removeUserFromSharedGroup(groupId, username);
    }
    
    /**
     * @see org.olat.instantMessaging.InstantMessaging#deleteRosterGroup(java.lang.String)
     */
    public void deleteRosterGroup(String groupId) {
        buddyListSync.deleteSharedGroup(groupId);
        
    }
    
    /**
     * 
     * 
     * @see org.olat.instantMessaging.InstantMessaging#sendStatus(java.lang.String,
     *      java.lang.String)
     */
    public void sendStatus(String username, String message) {
        ClientManager.getInstance().getInstantMessagingClient(username)
                .sendPresence(Presence.Type.AVAILABLE, message, 1,
                        Presence.Mode.AVAILABLE);
    }

    /**
     * @see org.olat.instantMessaging.InstantMessaging#joinRoom(java.lang.String,
     *      java.lang.String, java.lang.String)
     */
    public void joinRoom(String username, String roomName, String password) {
        //TODO:gs make password protected rooms possible
        ClientManager.getInstance().getInstantMessagingClient(username)
                .sendConferenceParamsToFlashClient(roomName);

    }

    /**
     * 
     * @see org.olat.instantMessaging.InstantMessaging#startChat(java.lang.String,
     *      java.lang.String)
     */
    public void startChat(String username, String chatPartnerJid) {
        InstantMessagingClient imClient = ClientManager.getInstance()
                .getInstantMessagingClient(username);
        if (imClient.getFlashClientIsRunning())
            imClient.sendChatParamsToFlashClient(chatPartnerJid, imClient
                    .getMessage().getBody());

    }

    /**
     * @see org.olat.instantMessaging.InstantMessaging#isFlashClientRunning(java.lang.String)
     */
    public boolean isFlashClientRunning(String username) {
        return ClientManager.getInstance().getInstantMessagingClient(username)
                .getFlashClientIsRunning();
    }

    /**
     * @see org.olat.instantMessaging.InstantMessaging#getIMPassword(java.lang.String)
     */
    public String getIMPassword(String username) {
        return ClientManager.getInstance().getInstantMessagingClient(username).getPassword();
        
    }

    /**
     * @see org.olat.instantMessaging.InstantMessaging#getClients()
     */
    public Map getClients() {
        return ClientManager.getInstance().getClients();
    }

    /**
     * @see org.olat.instantMessaging.InstantMessaging#enableChat(java.lang.String)
     */
    public void enableChat(String username) {
        ClientManager.getInstance()
			.getInstantMessagingClient(username).enableCollaboration();
    }

    /**
     * @param username
     * @param reason A resason why the chat is disabled like "Doing test"
     * @see org.olat.instantMessaging.InstantMessaging#disableChat(java.lang.String, java.lang.String)
     */
    public void disableChat(String username, String reason) {
        ClientManager.getInstance()
    		.getInstantMessagingClient(username).disableCollaboration(reason);
    }


    /**
     * @see org.olat.instantMessaging.InstantMessaging#countConnectedUsers()
     */
    public int countConnectedUsers() {
        // -1 because we do not count the watching user
    	int connectedUsers = ClientManager.getInstance().countConnectedUsers()-1;
    	if(connectedUsers == -1)
    		connectedUsers = 0;
        return connectedUsers;
    }

    /**
     * @see org.olat.instantMessaging.InstantMessaging#synchonizeBuddyRoster(org.olat.group.BusinessGroup)
     */
    public void synchonizeBuddyRoster(BusinessGroup group) {
        if (log.isDebugEnabled()) {
            log.debug("synchronizing group::" + group.toString());
        }
        Manager securityManager = ManagerFactory.getManager();
        SecurityGroup owners = group.getOwnerGroup();
        SecurityGroup participants = group.getPartipiciantGroup();
        List users = securityManager.getIdentitiesOfSecurityGroup(owners);
        users.addAll(securityManager.getIdentitiesOfSecurityGroup(participants));
        OresHelper.createStringRepresenting(group);
    }
	
}