/*
 * Copyright 2014 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */
package at.gv.egovernment.moa.id.configuration.auth;

import java.util.Date;
import java.util.Iterator;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * @author tlenz
 *
 */
public class AuthenticationManager {
	
	private static final Logger log = LoggerFactory
			.getLogger(AuthenticationManager.class);	
	
	private static AuthenticationManager instance = null;
	private static IActiveUserStorage activeUsers = null;
	
	public static AuthenticationManager getInstance() {
		if (instance == null)
			instance = new AuthenticationManager();
		
		return instance;
	}
	
	private AuthenticationManager() {
		activeUsers = new MemoryActiveUserStorageImpl();
		
	}
	
	public AuthenticatedUser getActiveUser(String nameID) {
		return activeUsers.getUser(nameID);
	}
	
	public void setActiveUser(AuthenticatedUser authUser) {
		log.debug("LogIn user with nameID:" + authUser.getNameID());
		activeUsers.setUser(authUser.getNameID(), authUser);
		
	}
	
	public boolean isActiveUser(String nameID) {		
		AuthenticatedUser user = activeUsers.getUser(nameID);
		if (user != null && user.isAuthenticated())		
			return true;
		else
			return false;
	}
	
	public boolean isActiveUser(AuthenticatedUser authUser) {
		if (authUser != null)
			return isActiveUser(authUser.getNameID());
		else
			return false;
	}
	
	public void removeActiveUser(AuthenticatedUser authUser) {
		log.debug("LogOut active user " + authUser.getGivenName() + " " + authUser.getFamilyName()
				+ " dbID: " + authUser.getUserID() + " nameID:" + authUser.getNameID());
		activeUsers.removeUser(authUser.getNameID());
		
	}
	
	public void removeAllUsersAfterTimeOut() {
		Iterator<AuthenticatedUser> expiredUsers = activeUsers.getUserWithSessionTimeOut(new Date());
		while (expiredUsers.hasNext()) {
			AuthenticatedUser user = expiredUsers.next();
			activeUsers.removeUser(user.getNameID());
			log.info("LogOut user with ID" + user.getNameID() + " after SessionTimeOut.");
			
		}
		
	}

}