package org.opentrafficsim.demo.trafficcontrol;
   
   import java.awt.BorderLayout;
   import java.awt.Dimension;
   import java.io.ByteArrayInputStream;
   import java.io.IOException;
   import java.io.Serializable;
   import java.net.URL;
   import java.nio.charset.StandardCharsets;
  import java.rmi.RemoteException;
  import java.util.Scanner;
  
  import javax.naming.NamingException;
  import javax.swing.JPanel;
  
  import org.djunits.value.vdouble.scalar.Duration;
  import org.djunits.value.vdouble.scalar.Time;
  import org.djutils.event.EventInterface;
  import org.djutils.event.EventListenerInterface;
  import org.djutils.event.EventTypeInterface;
  import org.djutils.io.URLResource;
  import org.opentrafficsim.core.dsol.AbstractOTSModel;
  import org.opentrafficsim.core.dsol.OTSAnimator;
  import org.opentrafficsim.core.dsol.OTSSimulatorInterface;
  import org.opentrafficsim.demo.trafficcontrol.TrafCODDemo2_Generators.TrafCODModel;
  import org.opentrafficsim.draw.core.OTSDrawingException;
  import org.opentrafficsim.road.network.OTSRoadNetwork;
  import org.opentrafficsim.road.network.factory.xml.parser.XmlNetworkLaneParser;
  import org.opentrafficsim.swing.gui.OTSAnimationPanel;
  import org.opentrafficsim.swing.gui.OTSSimulationApplication;
  import org.opentrafficsim.trafficcontrol.TrafficController;
  import org.opentrafficsim.trafficcontrol.trafcod.TrafCOD;
  
  import nl.tudelft.simulation.dsol.SimRuntimeException;
  import nl.tudelft.simulation.language.DSOLException;
  
  /**
   * <p>
   * Copyright (c) 2013-2020 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
   * BSD-style license. See <a href="http://opentrafficsim.org/node/13">OpenTrafficSim License</a>.
   * <p>
   * @version $Revision$, $LastChangedDate$, by $Author$, initial version Dec 06, 2016 <br>
   * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
   * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
   * @author <a href="http://www.transport.citg.tudelft.nl">Wouter Schakel</a>
   */
  public class TrafCODDemo2_Generators extends OTSSimulationApplication<TrafCODModel>
  {
      /** */
      private static final long serialVersionUID = 20161118L;
  
      /**
       * Create a TrafcodAndTurbo demo.
       * @param title String; the title of the Frame
       * @param panel OTSAnimationPanel; the tabbed panel to display
       * @param model TrafCODModel; the model
       * @throws OTSDrawingException on animation error
       */
      public TrafCODDemo2_Generators(final String title, final OTSAnimationPanel panel, final TrafCODModel model)
              throws OTSDrawingException
      {
          super(model, panel);
      }
  
      /**
       * Main program.
       * @param args String[]; the command line arguments (not used)
       * @throws IOException ...
       */
      public static void main(final String[] args) throws IOException
      {
          demo(true);
      }
  
      /**
       * Open an URL, read it and store the contents in a string. Adapted from
       * https://stackoverflow.com/questions/4328711/read-url-to-string-in-few-lines-of-java-code
       * @param url URL; the URL
       * @return String
       * @throws IOException when reading the file fails
       */
      public static String readStringFromURL(final URL url) throws IOException
      {
          try (Scanner scanner = new Scanner(url.openStream(), StandardCharsets.UTF_8.toString()))
          {
              scanner.useDelimiter("\\A");
              return scanner.hasNext() ? scanner.next() : "";
          }
      }
  
      /**
       * Start the demo.
       * @param exitOnClose boolean; when running stand-alone: true; when running as part of a demo: false
       * @throws IOException when reading the file fails
       */
      public static void demo(final boolean exitOnClose) throws IOException
      {
          try
          {
             OTSAnimator simulator = new OTSAnimator("TrafCODDemo2_Generators");
             URL url = URLResource.getResource("/TrafCODDemo2/TrafCODDemo2_Generators.xml");
             String xml = readStringFromURL(url);
             final TrafCODModel trafcodModel = new TrafCODModel(simulator, "TrafCODModel", "TrafCOD demonstration Model", xml);
             simulator.initialize(Time.ZERO, Duration.ZERO, Duration.instantiateSI(3600.0), trafcodModel);
             OTSAnimationPanel animationPanel = new OTSAnimationPanel(trafcodModel.getNetwork().getExtent(),
                     new Dimension(800, 600), simulator, trafcodModel, DEFAULT_COLORER, trafcodModel.getNetwork());
             TrafCODDemo2_Generators app =
                     new TrafCODDemo2_Generators("TrafCOD demo complex crossing", animationPanel, trafcodModel);
             app.setExitOnClose(exitOnClose);
             animationPanel.enableSimulationControlButtons();
         }
         catch (SimRuntimeException | NamingException | RemoteException | OTSDrawingException | DSOLException exception)
         {
             exception.printStackTrace();
         }
     }
 
     /**
      * Add tab with trafCOD status.
      */
     @Override
     protected final void addTabs()
     {
         // This version does not properly construct the console panel ...
         // JScrollPane scrollPane = new JScrollPane(getModel().getControllerDisplayPanel());
         // JPanel wrapper = new JPanel(new BorderLayout());
         // wrapper.add(scrollPane);
         // getAnimationPanel().getTabbedPane().addTab(getAnimationPanel().getTabbedPane().getTabCount() - 1,
         // getModel().getTrafCOD().getId(), wrapper);
     }
 
     /**
      * The simulation model.
      */
     static class TrafCODModel extends AbstractOTSModel implements EventListenerInterface
     {
         /** */
         private static final long serialVersionUID = 20161020L;
 
         /** The network. */
         private OTSRoadNetwork network;
 
         /** The XML. */
         private final String xml;
 
         /** The TrafCOD controller. */
         private TrafCOD trafCOD;
 
         /** TrafCOD controller display. */
         private JPanel controllerDisplayPanel = new JPanel(new BorderLayout());
 
         /**
          * @param simulator OTSSimulatorInterface; the simulator
          * @param shortName String; name of the model
          * @param description String; description of the model
          * @param xml String; the XML string
          */
         TrafCODModel(final OTSSimulatorInterface simulator, final String shortName, final String description, final String xml)
         {
             super(simulator, shortName, description);
             this.xml = xml;
         }
 
         /** {@inheritDoc} */
         @Override
         public void constructModel() throws SimRuntimeException
         {
             try
             {
                 this.network = new OTSRoadNetwork(getShortName(), true, getSimulator());
                 XmlNetworkLaneParser.build(new ByteArrayInputStream(this.xml.getBytes(StandardCharsets.UTF_8)), this.network,
                         false);
 
                 String controllerName = "TrafCOD_complex";
                 this.trafCOD = new TrafCOD(controllerName, URLResource.getResource("/TrafCODDemo2/Intersection12Dir.tfc"),
                         getSimulator(), this.controllerDisplayPanel, null, null);
                 this.trafCOD.addListener(this, TrafficController.TRAFFICCONTROL_CONTROLLER_EVALUATING);
                 this.trafCOD.addListener(this, TrafficController.TRAFFICCONTROL_CONTROLLER_WARNING);
                 this.trafCOD.addListener(this, TrafficController.TRAFFICCONTROL_CONFLICT_GROUP_CHANGED);
                 this.trafCOD.addListener(this, TrafficController.TRAFFICCONTROL_STATE_CHANGED);
                 this.trafCOD.addListener(this, TrafficController.TRAFFICCONTROL_VARIABLE_CREATED);
                 this.trafCOD.addListener(this, TrafficController.TRAFFICCONTROL_TRACED_VARIABLE_UPDATED);
                 // Subscribe the TrafCOD machine to trace command events that we emit
                 addListener(this.trafCOD, TrafficController.TRAFFICCONTROL_SET_TRACING);
                 // fireEvent(TrafficController.TRAFFICCONTROL_SET_TRACING, new Object[] {controllerName, "TGX", 8, true});
                 // fireEvent(TrafficController.TRAFFICCONTROL_SET_TRACING, new Object[] {controllerName, "XR1", 11, true});
                 // fireEvent(TrafficController.TRAFFICCONTROL_SET_TRACING, new Object[] {controllerName, "TD1", 11, true});
                 // fireEvent(TrafficController.TRAFFICCONTROL_SET_TRACING, new Object[] {controllerName, "TGX", 11, true});
                 // fireEvent(TrafficController.TRAFFICCONTROL_SET_TRACING, new Object[] {controllerName, "TL", 11, true});
                 // System.out.println("demo: emitting a SET TRACING event for all variables related to stream 11");
                 // fireEvent(TrafficController.TRAFFICCONTROL_SET_TRACING, new Object[] { controllerName, "", 11, true });
 
                 // this.trafCOD.traceVariablesOfStream(TrafficController.NO_STREAM, true);
                 // this.trafCOD.traceVariablesOfStream(11, true);
                 // this.trafCOD.traceVariable("MRV", 11, true);
             }
             catch (Exception exception)
             {
                 exception.printStackTrace();
             }
         }
 
         /** {@inheritDoc} */
         @Override
         public final OTSRoadNetwork getNetwork()
         {
             return this.network;
         }
 
         /**
          * @return trafCOD
          */
         public final TrafCOD getTrafCOD()
         {
             return this.trafCOD;
         }
 
         /**
          * @return controllerDisplayPanel
          */
         public final JPanel getControllerDisplayPanel()
         {
             return this.controllerDisplayPanel;
         }
 
         /** {@inheritDoc} */
         @Override
         public void notify(final EventInterface event) throws RemoteException
         {
             EventTypeInterface type = event.getType();
             Object[] payload = (Object[]) event.getContent();
             if (TrafficController.TRAFFICCONTROL_CONTROLLER_EVALUATING.equals(type))
             {
                 // System.out.println("Evaluation starts at " + getSimulator().getSimulatorTime());
                 return;
             }
             else if (TrafficController.TRAFFICCONTROL_CONFLICT_GROUP_CHANGED.equals(type))
             {
                 System.out.println("Conflict group changed from " + ((String) payload[1]) + " to " + ((String) payload[2]));
             }
             else if (TrafficController.TRAFFICCONTROL_TRACED_VARIABLE_UPDATED.equals(type))
             {
                 System.out.println(String.format("Variable changed %s <- %d   %s", payload[1], payload[4], payload[5]));
             }
             else if (TrafficController.TRAFFICCONTROL_CONTROLLER_WARNING.equals(type))
             {
                 System.out.println("Warning " + payload[1]);
             }
             else
             {
                 System.out.print("TrafCODDemo received event of type " + event.getType() + ", payload [");
                 String separator = "";
                 for (Object o : payload)
                 {
                     System.out.print(separator + o);
                     separator = ",";
                 }
                 System.out.println("]");
             }
         }
 
         /** {@inheritDoc} */
         @Override
         public Serializable getSourceId()
         {
             return "TrafCODModel";
         }
 
     }
 
 }