/*
    * @(#) DSOLApplication.java Oct 24, 2003
    * 
    * Copyright (c) 2002-2005 Delft University of Technology Jaffalaan 5, 2628 BX
    * Delft, the Netherlands. All rights reserved.
    * 
    * This software is proprietary information of Delft University of Technology
    * The code is published under the Lesser General Public License
    */
  package nl.tudelft.simulation.dsol.gui;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.net.URL;
  import java.util.Arrays;
  import java.util.Comparator;
  import java.util.Iterator;
  import java.util.Properties;
  import java.util.TreeSet;
  
  import nl.tudelft.simulation.dsol.experiment.Experiment;
  import nl.tudelft.simulation.dsol.gui.applets.DSOLSecurityManager;
  import nl.tudelft.simulation.dsol.gui.windows.DSOLFrame;
  import nl.tudelft.simulation.dsol.simulators.Animator;
  import nl.tudelft.simulation.event.EventProducer;
  import nl.tudelft.simulation.language.io.URLResource;
  import nl.tudelft.simulation.logger.Logger;
  import nl.tudelft.simulation.logger.handlers.MemoryHandler;
  
  /***
   * The DSOL Application <br>
   * (c) copyright 2002-2005 <a href="http://www.simulation.tudelft.nl">Delft
   * University of Technology </a>, the Netherlands. <br>
   * See for project information <a
   * href="http://www.simulation.tudelft.nl">www.simulation.tudelft.nl </a> <br>
   * License of use: <a href="http://www.gnu.org/copyleft/lesser.html">Lesser
   * General Public License (LGPL) </a>, no warranty.
   * 
   * @version $Revision$ $Date$
   * @author <a href="http://www.tbm.tudelft.nl/webstaf/peterja">Peter Jacobs </a>
   */
  public class DSOLApplication extends EventProducer implements
  		DSOLApplicationInterface
  {
  	/*** the experiment */
  	protected Experiment experiment = null;
  
  	/*** the properties */
  	protected Properties properties = new Properties();
  
  	/*** the recents */
  	protected TreeSet recents = new TreeSet(new RecentComparator());
  
  	/***
  	 * constructs a new DSOLApplicationInterface
  	 * 
  	 * @param navigation an URL to an xml-based navigation structure.
  	 */
  	public DSOLApplication(final URL navigation)
  	{
  		super();
  		System.setSecurityManager(new DSOLSecurityManager());
  		// Runtime.runFinalizersOnExit(true);
  		Logger.setDefaultHandler(MemoryHandler.class);
  		try
  		{
  			this.readProperties(this.properties);
  			new DSOLFrame(this, navigation);
  		} catch (Exception exception)
  		{
  			Logger.warning(this, "DSOLApplicationInterface", exception);
  		}
  	}
  
  	/***
  	 * @see java.lang.Object#finalize()
  	 */
  	protected void finalize() throws Throwable
  	{
  		this.writeProperties(this.properties);
  		super.finalize();
  	}
  
  	/***
  	 * returns the experiment
  	 * 
  	 * @return Experiment
  	 */
  	public Experiment getExperiment()
  	{
  		return this.experiment;
  	}
  
  	/***
  	 * sets the experiment
  	 * 
  	 * @param experiment the experiment
 	 */
 	public void setExperiment(final Experiment experiment)
 	{
 		this.experiment = experiment;
 		if (this.experiment != null && this.experiment.getUrl() != null)
 		{
 			this.recents.add(new Recent(experiment.getUrl().toString(), System
 					.currentTimeMillis()));
 			Object[] elements = this.recents.toArray();
 			this.recents.clear();
 			this.recents.addAll(Arrays.asList(elements));
 			try
 			{
 				this.writeProperties(this.properties);
 
 				this.experiment.setSimulator(new Animator());
 				this.experiment.start();
 				this.experiment.getSimulator().stop();
 			} catch (Exception exception)
 			{
 				Logger.warning(this, "setExperiment", exception);
 			}
 		}
 		this.fireEvent(EXPERIMENT_CHANGED_EVENT, experiment);
 	}
 
 	/***
 	 * returns the properties
 	 * 
 	 * @return Properties
 	 */
 	public Properties getProperties()
 	{
 		return this.properties;
 	}
 
 	/***
 	 * executes the dsol control panel
 	 * 
 	 * @param args the command-line arguments
 	 */
 	public static void main(final String[] args)
 	{
 		URL navigation = null;
 		if (args.length != 0)
 		{
 			navigation = URLResource.getResource(args[0]);
 		} else if (System.getProperty("dsol.navigation") != null)
 		{
 			navigation = URLResource.getResource(System
 					.getProperty("dsol.navigation"));
 		}
 		if (navigation == null)
 		{
 			navigation = URLResource.getResource("/navigation.xml");
 		}
 		new DSOLApplication(navigation);
 	}
 
 	/***
 	 * reads the properties
 	 * 
 	 * @param properties the properties to read
 	 * @throws IOException on failure
 	 */
 	private void readProperties(final Properties properties) throws IOException
 	{
 		properties.load(URLResource.getResourceAsStream("/dsol.properties"));
 		String tempPath = System.getProperty("java.io.tmpdir");
 		String fileName = this.getClass().getName() + "_dsol.properties";
 		File file = new File(tempPath, fileName);
 		if (file.exists() && !("true".equals(properties.get("edited"))))
 		{
 			FileInputStream stream = new FileInputStream(file);
 			properties.load(stream);
 			stream.close();
 		}
 		int i = 0;
 		String value = null;
 		while ((value = properties.getProperty("recent[" + i + "]")) != null)
 		{
 			String[] elements = value.split("!#!");
 			this.recents.add(new Recent(elements[0], Long
 					.parseLong(elements[1])));
 			i++;
 		}
 	}
 
 	/***
 	 * reads the properties
 	 * 
 	 * @param properties the properties to read
 	 * @throws IOException on failure
 	 */
 	private void writeProperties(final Properties properties)
 			throws IOException
 	{
 		int loop = 0;
 		for (Iterator i = this.recents.iterator(); i.hasNext();)
 		{
 			Recent recent = (Recent) i.next();
 			if (loop <= 5)
 			{
 				this.properties.put("recent[" + loop + "]", recent.getLabel()
 						+ "!#!" + recent.getExecutionTime());
 			}
 			loop++;
 		}
 		String tempPath = System.getProperty("java.io.tmpdir");
 		String fileName = this.getClass().getName() + "_dsol.properties";
 		File file = new File(tempPath, fileName);
 		if (!file.exists())
 		{
 			file.createNewFile();
 		}
 		FileOutputStream outputStream = new FileOutputStream(file);
 		this.properties.store(outputStream, "");
 		outputStream.close();
 	}
 
 	/***
 	 * the Recent Comparator
 	 */
 	private static class RecentComparator implements Comparator
 	{
 		/***
 		 * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
 		 */
 		public int compare(final Object o1, final Object o2)
 		{
 			Recent r1 = (Recent) o1;
 			Recent r2 = (Recent) o2;
 			if (r1.getLabel().equals(r2.getLabel()))
 			{
 				long executionTime = Math.max(r1.getExecutionTime(), r2
 						.getExecutionTime());
 				r1.executionTime = executionTime;
 				r2.executionTime = executionTime;
 				return 0;
 			}
 			return new Long(r2.getExecutionTime()).compareTo(new Long(r1
 					.getExecutionTime()));
 		}
 	}
 
 	/***
 	 * A RecentItem
 	 */
 	private static class Recent
 	{
 		/*** the label to use */
 		private String label = null;
 
 		/*** the executionTime */
 		protected long executionTime = 0L;
 
 		/***
 		 * constructs a new Recent
 		 * 
 		 * @param label the label of the experimen
 		 * @param executionTime the executionTime of the experiment
 		 */
 		public Recent(final String label, final long executionTime)
 		{
 			this.executionTime = executionTime;
 			this.label = label;
 		}
 
 		/***
 		 * @return Returns the executionTime.
 		 */
 		public long getExecutionTime()
 		{
 			return this.executionTime;
 		}
 
 		/***
 		 * @return Returns the label.
 		 */
 		public String getLabel()
 		{
 			return this.label;
 		}
 	}
 }