package org.opentrafficsim.animation.road;
   
   import java.awt.Color;
   import java.awt.Graphics2D;
   import java.awt.geom.Path2D;
   import java.awt.image.ImageObserver;
   
   import org.djutils.draw.point.Point2d;
   import org.opentrafficsim.animation.DrawLevel;
  import org.opentrafficsim.animation.OtsRenderable;
  import org.opentrafficsim.animation.RenderableTextSource;
  import org.opentrafficsim.animation.TextAlignment;
  import org.opentrafficsim.animation.road.GtuGeneratorPositionAnimation.GtuGeneratorPositionData;
  import org.opentrafficsim.base.geometry.OtsShape;
  
  import nl.tudelft.simulation.naming.context.Contextualized;
  
  /**
   * Animates a GtuGeneratorPosition.
   * <p>
   * Copyright (c) 2022-2026 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
   * BSD-style license. See <a href="https://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
   * </p>
   * @author Alexander Verbraeck
   * @author Peter Knoppers
   * @author Wouter Schakel
   */
  public class GtuGeneratorPositionAnimation extends OtsRenderable<GtuGeneratorPositionData>
  {
  
      /** Chevron path to draw. */
      private static final Path2D.Float PATH;
  
      static
      {
          PATH = new Path2D.Float();
          addChevron(PATH, 0);
          addChevron(PATH, 1);
          addChevron(PATH, 2);
      }
  
      /**
       * Add chevron to drawing path.
       * @param path Path2D.Float; path.
       * @param number number of the chevron.
       */
      private static void addChevron(final Path2D.Float path, final int number)
      {
          float x = number * 1.5f;
          path.moveTo(x, -1.0);
          path.lineTo(x + 1.0, 0.0);
          path.lineTo(x, 1.0);
          path.lineTo(x + 0.75, 1.0);
          path.lineTo(x + 1.75, 0.0);
          path.lineTo(x + 0.75, -1.0);
          path.lineTo(x, -1.0);
      }
  
      /** Queue text. */
      private final Queue queue;
  
      /**
       * Constructor.
       * @param source source.
       * @param contextProvider simulator.
       */
      public GtuGeneratorPositionAnimation(final GtuGeneratorPositionData source, final Contextualized contextProvider)
      {
          super(source, contextProvider);
          this.queue = new Queue(source, contextProvider);
      }
  
      @Override
      public synchronized void destroy(final Contextualized contextProvider)
      {
          super.destroy(contextProvider);
          this.queue.destroy(contextProvider);
      }
  
      @Override
      public void paint(final Graphics2D graphics, final ImageObserver observer)
      {
          graphics.setColor(Color.BLUE);
          setRendering(graphics);
          graphics.fill(PATH);
          resetRendering(graphics);
      }
  
      /**
       * Paints a queue counter with a GtuGeneratorPosition.
       */
      public static class Queue extends RenderableTextSource<GtuGeneratorPositionData, Queue>
      {
          /**
           * Constructor.
           * @param source source.
           * @param contextualized context provider
           */
          public Queue(final GtuGeneratorPositionData source, final Contextualized contextualized)
         {
             super(source, () -> Integer.toString(source.getQueueCount()), 0.0f, 0.0f, TextAlignment.CENTER, Color.BLACK, 3.0f,
                     12.0f, 50f, contextualized, null, RenderableTextSource.RENDERWHEN10);
         }
     }
 
     /**
      * GtuGeneratorPositionData provides the information required to draw a GTU generator position.
      */
     public interface GtuGeneratorPositionData extends OtsShape
     {
         /**
          * Returns the queue count.
          * @return queue count.
          */
         int getQueueCount();
 
         @Override
         default double signedDistance(final Point2d point)
         {
             return getLocation().distance(point);
         }
 
         @Override
         default double getZ()
         {
             return DrawLevel.OBJECT.getZ();
         }
     }
 
 }