package org.opentrafficsim.animation.road;
   
   import java.awt.Color;
   import java.awt.Graphics2D;
   import java.awt.image.ImageObserver;
   import java.util.function.Supplier;
   
   import org.djunits.unit.LengthUnit;
   import org.djunits.value.vdouble.scalar.Length;
  import org.opentrafficsim.animation.RenderableTextSource;
  import org.opentrafficsim.animation.TextAlignment;
  import org.opentrafficsim.animation.road.AbstractLineAnimation.LaneBasedObjectData;
  import org.opentrafficsim.animation.road.TrafficLightAnimation.Text;
  import org.opentrafficsim.animation.road.TrafficLightAnimation.TrafficLightData;
  
  import nl.tudelft.simulation.naming.context.Contextualized;
  
  /**
   * Draw a traffic light on the road at th place where the cars are expected to stop.
   * <p>
   * Copyright (c) 2013-2026 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 TrafficLightAnimation extends AbstractLineAnimation<TrafficLightData, Text>
  {
  
      /**
       * Construct the DefaultCarAnimation for a LaneBlock (road block).
       * @param trafficLight the traffic light
       * @param contextualized context provider
       */
      public TrafficLightAnimation(final TrafficLightData trafficLight, final Contextualized contextualized)
      {
          super(trafficLight, contextualized, new Length(0.5, LengthUnit.SI));
      }
  
      @Override
      protected Text createText(final TrafficLightData source, final Contextualized contextualized, final String prefix)
      {
          float halfLength = (float) (source.getLine().getLength() / 2.0);
          return new Text(source, source::getId, 0.0f, halfLength + 0.2f, contextualized);
      }
  
      @Override
      public final void paint(final Graphics2D graphics, final ImageObserver observer)
      {
          graphics.setColor(getSource().getColor());
          super.paint(graphics, observer);
      }
  
      @Override
      public final String toString()
      {
          return "TrafficLightAnimation [getSource()=" + this.getSource() + "]";
      }
  
      /**
       * Text animation for the TrafficLight.
       */
      public static class Text extends RenderableTextSource<TrafficLightData, Text>
      {
          /**
           * Constructor.
           * @param source the object for which the text is displayed
           * @param text the text to display
           * @param dx the horizontal movement of the text, in meters
           * @param dy the vertical movement of the text, in meters
           * @param contextualized context provider
           */
          public Text(final TrafficLightData source, final Supplier<String> text, final float dx, final float dy,
                  final Contextualized contextualized)
          {
              super(source, text, dx, dy, TextAlignment.CENTER, Color.BLACK, contextualized, RenderableTextSource.RENDERWHEN10);
          }
  
          @Override
          public final String toString()
          {
              return "Text []";
          }
      }
  
      /**
       * TrafficLightData provides the information required to draw a traffic light.
       */
      public interface TrafficLightData extends LaneBasedObjectData
      {
          /**
           * Returns the traffic light color.
           * @return traffic light color
           */
          Color getColor();
      }
  
  }