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.ConfigurationDBRead;
import at.gv.egovernment.moa.id.commons.db.ConfigurationDBUtils;
import at.gv.egovernment.moa.id.commons.db.dao.config.UserDatabase;
import at.gv.egovernment.moa.id.configuration.config.ConfigurationProvider;
import at.gv.egovernment.moa.id.configuration.exception.ConfigurationException;
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 = 60 * 60; // 60 min
		
	public void run() {
		 while (true) {
			 try {
				ConfigurationProvider config = ConfigurationProvider.getInstance();
				
				List<UserDatabase> userrequests = ConfigurationDBRead.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");
							ConfigurationDBUtils.delete(dbuser);
						}
					
					}					
				}

				Thread.sleep(SESSION_CLEANUP_INTERVAL * 1000);
				
			} catch (ConfigurationException e) {
				log.info("UserRequestCleaner can not load configuration", e);
				
			} catch (InterruptedException e) {
				
			} finally {
				ConfigurationDBUtils.closeSession();
				
			}
		 }
	}
	
	  /**
	   * 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();
	  }
	
}