/*******************************************************************************
 * 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.utils;

import java.util.Calendar;
import java.util.Date;
import java.util.List;

import org.apache.log4j.Logger;

import at.gv.egovernment.moa.id.commons.db.dao.config.UserDatabase;
import at.gv.egovernment.moa.id.config.webgui.exception.ConfigurationException;
import at.gv.egovernment.moa.id.configuration.auth.AuthenticationManager;
import at.gv.egovernment.moa.id.configuration.config.ConfigurationProvider;
import at.gv.egovernment.moa.id.configuration.helper.DateTimeHelper;


public class UserRequestCleaner implements Runnable {

	private static final Logger log = Logger.getLogger(UserRequestCleaner.class);
	
	private static final long SESSION_CLEANUP_INTERVAL = 5 * 60; // 5 min
		
	public void run() {
		 while (true) {
			 try {
				ConfigurationProvider config = ConfigurationProvider.getInstance();
				
				//clean up user request storage
				List<UserDatabase> userrequests = config.getUserManagement().getAllOpenUsersRequests();
				if (userrequests != null) {
					Calendar cal = Calendar.getInstance();
					cal.add(Calendar.HOUR, config.getUserRequestCleanUpDelay()*-1);
					Date cleanupdate = cal.getTime();
					
					for(UserDatabase dbuser : userrequests) {
						Date requestdate = DateTimeHelper.parseDateTime(dbuser.getLastLogin());

						if (requestdate != null && requestdate.after(cleanupdate)) {
							log.info("Remove UserRequest from Database");
							config.getUserManagement().delete(dbuser);
						}
					
					}					
				}
				
				//clean up active user storage
				AuthenticationManager.getInstance().removeAllUsersAfterTimeOut();
								
				Thread.sleep(SESSION_CLEANUP_INTERVAL * 1000);
				
			} catch (ConfigurationException e) {
				log.info("UserRequestCleaner can not load configuration", e);
				
			} catch (InterruptedException e) {
				
			} 
		 }
	}
	
	  /**
	   * start the sessionCleaner
	   */
	  public static void start() {
	    // start the session cleanup thread
	    Thread sessionCleaner = new Thread(new UserRequestCleaner());
	    sessionCleaner.setName("UserRequestCleaner");
	    sessionCleaner.setDaemon(true);
	    sessionCleaner.setPriority(Thread.MIN_PRIORITY);
	    sessionCleaner.start();
	  }
	
}