package org.opentrafficsim.trafficcontrol.trafcod;
   
   import java.awt.Color;
   import java.awt.Dimension;
   import java.awt.Graphics;
   import java.awt.Graphics2D;
   import java.awt.event.MouseEvent;
   import java.awt.event.MouseListener;
   import java.awt.event.MouseMotionListener;
  import java.awt.geom.Point2D;
  import java.awt.image.BufferedImage;
  import java.rmi.RemoteException;
  import java.util.HashSet;
  import java.util.Set;
  
  import javax.media.j3d.Bounds;
  import javax.swing.JPanel;
  import javax.swing.ToolTipManager;
  
  import nl.tudelft.simulation.event.EventInterface;
  import nl.tudelft.simulation.event.EventListenerInterface;
  import nl.tudelft.simulation.event.EventType;
  import nl.tudelft.simulation.language.d3.DirectedPoint;
  
  import org.djunits.value.vdouble.scalar.Length;
  import org.opentrafficsim.core.geometry.OTSLine3D;
  import org.opentrafficsim.road.network.lane.Lane;
  import org.opentrafficsim.road.network.lane.object.sensor.NonDirectionalOccupancySensor;
  import org.opentrafficsim.road.network.lane.object.trafficlight.TrafficLight;
  import org.opentrafficsim.road.network.lane.object.trafficlight.TrafficLightColor;
  
  /**
   * Display the current state of a TrafCOD machine.
   * <p>
   * Copyright (c) 2013-2016 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 Nov 15, 2016 <br>
   * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
   */
  public class TrafCODDisplay extends JPanel implements MouseMotionListener, MouseListener
  {
      /** */
      private static final long serialVersionUID = 20161115L;
  
      /** Background image. */
      private final BufferedImage image;
  
      /** The set of objects drawn on the image. */
      private Set<TrafCODObject> trafCODObjects = new HashSet<>();
  
      /** Store the tool tip delay so we can restore it when the mouse exits this TrafCODDisplay. */
      final int defaultInitialDelay = ToolTipManager.sharedInstance().getInitialDelay();
  
      /**
       * Construct a new TrafCODDisplay.
       * @param image BufferedImage; the background image. This constructor does not make a deep copy of the image. Please do not
       *            modify the image after calling this constructor
       */
      public TrafCODDisplay(final BufferedImage image)
      {
          this.image = image;
          super.setPreferredSize(new Dimension(this.image.getWidth(), this.image.getHeight()));
          addMouseMotionListener(this);
      }
  
      @Override
      protected void paintComponent(final Graphics g)
      {
          super.paintComponent(g);
          g.drawImage(this.image, 0, 0, null);
          for (TrafCODObject tco : this.trafCODObjects)
          {
              tco.draw((Graphics2D) g);
          }
      }
  
      /**
       * Add one TrafCODObject to this TrafCODDisplay.
       * @param trafCODObject TrafCODObject; the TrafCOD object that must be added
       */
      void addTrafCODObject(final TrafCODObject trafCODObject)
      {
          this.trafCODObjects.add(trafCODObject);
      }
  
      /** {@inheritDoc} */
      @Override
      public void mouseDragged(MouseEvent e)
      {
          mouseMoved(e); // Do the same as in the mouse move event
      }
  
      /** {@inheritDoc} */
      @Override
      public void mouseMoved(MouseEvent e)
      {
          String toolTipText = null;
          for (TrafCODObject tco : this.trafCODObjects)
         {
             toolTipText = tco.toolTipHit(e.getX(), e.getY());
             if (null != toolTipText)
             {
                 break;
             }
         }
         // System.out.println("Setting tool tip text to " + toolTipText);
         setToolTipText(toolTipText);
     }
 
     /** {@inheritDoc} */
     @Override
     public void mouseClicked(MouseEvent e)
     {
         // Ignore
     }
 
     /** {@inheritDoc} */
     @Override
     public void mousePressed(MouseEvent e)
     {
         // Ignore
     }
 
     /** {@inheritDoc} */
     @Override
     public void mouseReleased(MouseEvent e)
     {
         // Ignore
     }
 
     /** {@inheritDoc} */
     @Override
     public void mouseEntered(MouseEvent e)
     {
         ToolTipManager.sharedInstance().setInitialDelay(0);
     }
 
     /** {@inheritDoc} */
     @Override
     public void mouseExited(MouseEvent e)
     {
         ToolTipManager.sharedInstance().setInitialDelay(this.defaultInitialDelay);
     }
 
 }
 
 /**
  * Interface for objects that can draw themselves onto a Graphics2D and may want to show their own tool tip text when the mouse
  * hits them.
  */
 interface TrafCODObject
 {
     /**
      * Draw yourself at the indicated location/
      * @param g2 Graphics2D; the graphics context
      */
     void draw(Graphics2D g2);
 
     /**
      * Check if the given coordinates hit the TrafCODObject. If it does return a String to be used as a tool tip text. If the
      * coordinates do not hit this TrafCODObject return null.
      * @param testX int; the x-coordinate
      * @param testY int; the y-coordinate
      * @return String; the tool tip text or null if the coordinates do not hit the TrafCodObject
      */
     String toolTipHit(int testX, int testY);
 
 }
 
 /**
  * Draws a detector.
  */
 class DetectorImage implements TrafCODObject, EventListenerInterface
 {
     /** The TrafCOD display. */
     private final TrafCODDisplay display;
 
     /** X-coordinate on the TrafCOD display image where this traffic light must be drawn. */
     private final int x;
 
     /** Y-coordinate on the TrafCOD display image where this traffic light must be drawn. */
     private final int y;
 
     /** Tool tip text for this detector image. */
     private final String description;
 
     /** Fill color (used to indicate the occupancy state of the detector). */
     private Color fillColor = Color.WHITE;
 
     /** Size of the box that is drawn. */
     private static final int BOX_SIZE = 13;
 
     /** Correction to make the result match that of the C++Builder version. */
     private static final int xOffset = 5;
 
     /** Correction to make the result match that of the C++Builder version. */
     private static final int yOffset = 5;
 
     /**
      * Construct a new DetectorImage.
      * @param display TrafCODDisplay; the TrafCOD display on which this detector image will be rendered
      * @param center Point2D; the center location of the detector image on the TrafCOD display
      * @param description String; name of the detector (displayed as tool tip text)
      */
     public DetectorImage(final TrafCODDisplay display, Point2D center, String description)
     {
         this.display = display;
         this.x = (int) center.getX();
         this.y = (int) center.getY();
         this.description = description;
         display.addTrafCODObject(this);
     }
 
     /** {@inheritDoc} */
     @Override
     public void draw(Graphics2D g2)
     {
         g2.setColor(this.fillColor);
         g2.fillRect(xOffset + this.x - BOX_SIZE / 2, yOffset + this.y - BOX_SIZE / 2, BOX_SIZE, BOX_SIZE);
         g2.setColor(Color.BLACK);
         g2.drawRect(xOffset + this.x - BOX_SIZE / 2, yOffset + this.y - BOX_SIZE / 2, BOX_SIZE, BOX_SIZE);
     }
 
     /** {@inheritDoc} */
     @Override
     public void notify(EventInterface event) throws RemoteException
     {
         if (event.getType().equals(NonDirectionalOccupancySensor.NON_DIRECTIONAL_OCCUPANCY_SENSOR_TRIGGER_ENTRY_EVENT))
         {
             this.fillColor = Color.BLUE;
         }
         else if (event.getType().equals(NonDirectionalOccupancySensor.NON_DIRECTIONAL_OCCUPANCY_SENSOR_TRIGGER_EXIT_EVENT))
         {
             this.fillColor = Color.WHITE;
         }
         this.display.repaint();
     }
 
     /** {@inheritDoc} */
     @Override
     public String toolTipHit(final int testX, final int testY)
     {
         if (testX < xOffset + this.x - BOX_SIZE / 2 || testX >= xOffset + this.x + BOX_SIZE / 2
                 || testY < yOffset - BOX_SIZE / 2 + this.y || testY >= yOffset + this.y + BOX_SIZE / 2)
         {
             return null;
         }
         return this.description;
     }
 
 }
 
 /**
  * Draws a traffic light. <br>
  * The implementation of TrafficLight only implements setTrafficLightColor. All other methods are dummies.
  */
 class TrafficLightImage implements TrafficLight, TrafCODObject
 {
     /** The TrafCOD display. */
     private final TrafCODDisplay display;
 
     /** X-coordinate on the TrafCOD display image where this traffic light must be drawn. */
     private final int x;
 
     /** Y-coordinate on the TrafCOD display image where this traffic light must be drawn. */
     private final int y;
 
     /** Tool tip text for this traffic light image. */
     private final String description;
 
     /** The current color. */
     private TrafficLightColor color = TrafficLightColor.BLACK;
 
     /**
      * Create a traffic light image.
      * @param display TrafCODDisplay; the TrafCOD display on which this traffic light image will be rendered
      * @param center Point2D; coordinates in the image where this traffic light is centered on
      * @param description String; tool tip text for the new traffic light image
      */
     public TrafficLightImage(final TrafCODDisplay display, final Point2D center, final String description)
     {
         this.display = display;
         this.x = (int) center.getX();
         this.y = (int) center.getY();
         this.description = description;
         display.addTrafCODObject(this);
     }
 
     /** {@inheritDoc} */
     @Override
     public String toolTipHit(int testX, int testY)
     {
         if (testX < this.x - DISC_SIZE / 2 || testX >= this.x + DISC_SIZE / 2 || testY < this.y - DISC_SIZE / 2
                 || testY >= this.y + DISC_SIZE / 2)
         {
             return null;
         }
         return this.description;
     }
 
     /** {@inheritDoc} */
     @Override
     public DirectedPoint getLocation()
     {
         return null;
     }
 
     /** {@inheritDoc} */
     @Override
     public Bounds getBounds()
     {
         return null;
     }
 
     /** {@inheritDoc} */
     @Override
     public Lane getLane()
     {
         return null;
     }
 
     /** {@inheritDoc} */
     @Override
     public Length getLongitudinalPosition()
     {
         return null;
     }
 
     /** {@inheritDoc} */
     @Override
     public OTSLine3D getGeometry()
     {
         return null;
     }
 
     /** {@inheritDoc} */
     @Override
     public Length getHeight()
     {
         return null;
     }
 
     /** {@inheritDoc} */
     @Override
     public String getId()
     {
         return null;
     }
 
     /** {@inheritDoc} */
     @Override
     public boolean addListener(EventListenerInterface listener, EventType eventType) throws RemoteException
     {
         return false;
     }
 
     /** {@inheritDoc} */
     @Override
     public boolean addListener(EventListenerInterface listener, EventType eventType, boolean weak) throws RemoteException
     {
         return false;
     }
 
     /** {@inheritDoc} */
     @Override
     public boolean addListener(EventListenerInterface listener, EventType eventType, short position) throws RemoteException
     {
         return false;
     }
 
     /** {@inheritDoc} */
     @Override
     public boolean addListener(EventListenerInterface listener, EventType eventType, short position, boolean weak)
             throws RemoteException
     {
         return false;
     }
 
     /** {@inheritDoc} */
     @Override
     public boolean removeListener(EventListenerInterface listener, EventType eventType) throws RemoteException
     {
         return false;
     }
 
     /** {@inheritDoc} */
     @Override
     public TrafficLightColor getTrafficLightColor()
     {
         return null;
     }
 
     /** {@inheritDoc} */
     @Override
     public void setTrafficLightColor(TrafficLightColor trafficLightColor)
     {
         this.color = trafficLightColor;
         this.display.repaint();
     }
 
     /** Diameter of a traffic light disk in pixels. */
     private static final int DISC_SIZE = 11;
 
     /** {@inheritDoc} */
     @Override
     public void draw(Graphics2D g2)
     {
         Color lightColor;
         switch (this.color)
         {
             case BLACK:
                 lightColor = Color.BLACK;
                 break;
 
             case GREEN:
                 lightColor = Color.green;
                 break;
 
             case YELLOW:
                 lightColor = Color.YELLOW;
                 break;
 
             case RED:
                 lightColor = Color.RED;
                 break;
 
             default:
                 System.err.println("Unhandled TrafficLightColor: " + this.color);
                 return;
         }
         g2.setColor(lightColor);
         g2.fillOval(this.x - DISC_SIZE / 2, this.y - DISC_SIZE / 2, DISC_SIZE, DISC_SIZE);
         // System.out.println("Drawn disk in color " + lightColor);
     }
 
 }