package org.opentrafficsim.animation.gtu;
   
   import java.awt.BasicStroke;
   import java.awt.Color;
   import java.awt.Graphics2D;
   import java.awt.geom.Ellipse2D;
   import java.awt.geom.Rectangle2D;
   import java.awt.geom.RectangularShape;
   import java.awt.image.ImageObserver;
  import java.util.function.Supplier;
  
  import org.djunits.value.vdouble.scalar.Length;
  import org.djutils.base.Identifiable;
  import org.djutils.draw.point.DirectedPoint2d;
  import org.opentrafficsim.animation.DrawLevel;
  import org.opentrafficsim.animation.OtsRenderable;
  import org.opentrafficsim.animation.RenderableTextSource;
  import org.opentrafficsim.animation.TextAlignment;
  import org.opentrafficsim.animation.gtu.DefaultCarAnimation.GtuData;
  import org.opentrafficsim.base.geometry.OtsLine2d;
  import org.opentrafficsim.base.geometry.OtsShape;
  
  import nl.tudelft.simulation.naming.context.Contextualized;
  
  /**
   * Draw a car.
   * <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 DefaultCarAnimation extends OtsRenderable<GtuData>
  {
      /** the Text object to destroy when the GTU animation is destroyed. */
      private Text text;
  
      /** Hashcode. */
      private final int hashCode;
  
      /** GTU outline. */
      private Rectangle2D.Double rectangle;
  
      /** Front indicator (white circle). */
      private Ellipse2D.Double frontIndicator;
  
      /** Left indicator. */
      private Rectangle2D.Double leftIndicator;
  
      /** Right indicator. */
      private Rectangle2D.Double rightIndicator;
  
      /** Left brake light. */
      private Rectangle2D.Double leftBrake;
  
      /** Right brake light. */
      private Rectangle2D.Double rightBrake;
  
      /** Marker if zoomed out. */
      private RectangularShape marker;
  
      /**
       * Construct the DefaultCarAnimation for a LaneBasedIndividualCar.
       * @param gtu the Car to draw
       * @param contextualized context provider
       */
      public DefaultCarAnimation(final GtuData gtu, final Contextualized contextualized)
      {
          super(gtu, contextualized);
          this.hashCode = gtu.hashCode();
          this.text = new Text(gtu, gtu::getId, 0.0f, 0.0f, TextAlignment.CENTER, Color.BLACK, contextualized,
                  new RenderableTextSource.ContrastToBackground()
                  {
                      @Override
                      public Color getBackgroundColor()
                      {
                          return gtu.getColor();
                      }
                  }).setDynamic(true);
      }
  
      @Override
      public final void paint(final Graphics2D graphics, final ImageObserver observer)
      {
          setRendering(graphics);
          final GtuData gtu = getSource();
          if (this.rectangle == null)
          {
              // set shapes, this is done in paint() and not the constructor, as the super constructor binds to context causing
              // paint commands before the shapes are calculated in the constructor
              final double length = gtu.getLength().si;
              final double lFront = gtu.getFront().si;
              final double lRear = gtu.getRear().si;
              final double width = gtu.getWidth().si;
              final double w2 = width / 2;
              final double w4 = width / 4;
              this.rectangle = new Rectangle2D.Double(lRear, -w2, length, width);
             this.frontIndicator = new Ellipse2D.Double(lFront - w2 - w4, -w4, w2, w2);
             this.leftIndicator = new Rectangle2D.Double(lFront - w4, -w2, w4, w4);
             this.rightIndicator = new Rectangle2D.Double(lFront - w4, w2 - w4, w4, w4);
             this.leftBrake = new Rectangle2D.Double(lRear, w2 - w4, w4, w4);
             this.rightBrake = new Rectangle2D.Double(lRear, -w2, w4, w4);
             this.marker = gtu.getMarker();
         }
 
         double scaleX = graphics.getTransform().getScaleX();
         double scaleY = graphics.getTransform().getScaleY();
         if (scaleX > 1 && scaleY > 1)
         {
             // Rotate as isRotate() returns falls for when zoomed out and drawing dots
             graphics.rotate(-gtu.getDirZ());
 
             Color color = gtu.getColor();
             graphics.setColor(color);
             BasicStroke saveStroke = (BasicStroke) graphics.getStroke();
             graphics.setStroke(new BasicStroke(0.05f)); // 5 cm
             graphics.fill(this.rectangle);
 
             graphics.setColor(Color.WHITE);
             graphics.fill(this.frontIndicator);
             // Draw a white disk at the front to indicate which side faces forward
             if (color.equals(Color.WHITE))
             {
                 // Put a black ring around it
                 graphics.setColor(Color.BLACK);
                 graphics.draw(this.frontIndicator);
             }
 
             // turn indicator lights
             graphics.setColor(Color.YELLOW);
             if (gtu.leftIndicatorOn())
             {
                 graphics.fill(this.leftIndicator);
                 if (color.equals(Color.YELLOW))
                 {
                     graphics.setColor(Color.BLACK);
                     graphics.draw(this.leftIndicator);
                 }
             }
             if (gtu.rightIndicatorOn())
             {
                 graphics.fill(this.rightIndicator);
                 if (color.equals(Color.YELLOW))
                 {
                     graphics.setColor(Color.BLACK);
                     graphics.draw(this.rightIndicator);
                 }
             }
 
             // braking lights
             if (gtu.isBrakingLightsOn())
             {
                 graphics.setColor(Color.RED);
                 graphics.fill(this.leftBrake);
                 graphics.fill(this.rightBrake);
                 if (color.equals(Color.RED))
                 {
                     graphics.setColor(Color.BLACK);
                     graphics.draw(this.leftBrake);
                     graphics.draw(this.rightBrake);
                 }
             }
 
             graphics.setStroke(saveStroke);
         }
         else
         {
             // zoomed out, draw as marker with 7px diameter
             graphics.setColor(gtu.getColor());
             double w = 7.0 / scaleX;
             double h = 7.0 / scaleY;
             double x = -w / 2.0;
             double y = -h / 2.0;
             this.marker.setFrame(x, y, w, h);
             graphics.fill(this.marker);
         }
 
         resetRendering(graphics);
     }
 
     @Override
     public boolean isRotate()
     {
         return false;
     }
 
     @Override
     public void destroy(final Contextualized contextProvider)
     {
         super.destroy(contextProvider);
         this.text.destroy(contextProvider);
     }
 
     @Override
     public int hashCode()
     {
         return this.hashCode;
     }
 
     @Override
     public boolean equals(final Object object)
     {
         // only here to prevent a 'hashCode without equals' warning
         return super.equals(object);
     }
 
     /**
      * Text animation for the Car. Separate class to be able to turn it on and off...
      * <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 static class Text extends RenderableTextSource<GtuData, Text>
     {
         /** is the animation destroyed? */
         private boolean isTextDestroyed = false;
 
         /**
          * 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 textAlignment where to place the text
          * @param color the color of the text
          * @param contextualized context provider
          */
         public Text(final GtuData source, final Supplier<String> text, final float dx, final float dy,
                 final TextAlignment textAlignment, final Color color, final Contextualized contextualized)
         {
             super(source, text, dx, dy, textAlignment, color, 1.0f, 12.0f, 50f, contextualized,
                     RenderableTextSource.RENDERWHEN1);
         }
 
         /**
          * 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 textAlignment where to place the text
          * @param color the color of the text
          * @param contextualized context provider
          * @param background TextAnimation.ContrastToBackground; connection to retrieve the current background color
          */
         @SuppressWarnings("parameternumber")
         public Text(final GtuData source, final Supplier<String> text, final float dx, final float dy,
                 final TextAlignment textAlignment, final Color color, final Contextualized contextualized,
                 final RenderableTextSource.ContrastToBackground background)
         {
             super(source, text, dx, dy, textAlignment, color, 1.0f, 12.0f, 50f, contextualized, background, RENDERWHEN1);
             setRotate(false);
         }
 
         @Override
         public final String toString()
         {
             return "Text [isTextDestroyed=" + this.isTextDestroyed + "]";
         }
 
     }
 
     /**
      * GtuData provides the information required to draw a link.
      * <p>
      * Copyright (c) 2023-2026 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 interface GtuData extends OtsShape, Identifiable
     {
         /**
          * Returns the GTU color.
          * @return GTU color.
          */
         Color getColor();
 
         /**
          * Returns the length.
          * @return length.
          */
         Length getLength();
 
         /**
          * Returns the width.
          * @return width.
          */
         Length getWidth();
 
         /**
          * Returns the distance towards the front.
          * @return distance towards the front.
          */
         Length getFront();
 
         /**
          * Returns the distance towards the rear.
          * @return distance towards the rear.
          */
         Length getRear();
 
         /**
          * Returns whether the left indicator is on.
          * @return whether the left indicator is on.
          */
         boolean leftIndicatorOn();
 
         /**
          * Returns whether the right indicator is on.
          * @return whether the right indicator is on.
          */
         boolean rightIndicatorOn();
 
         /**
          * Returns the shape of a marker to show when zoomed out.
          * @return shape of a marker to show when zoomed out.
          */
         default RectangularShape getMarker()
         {
             return new Ellipse2D.Double(0, 0, 0, 0);
         }
 
         /**
          * Returns whether the braking lights are on.
          * @return whether the braking lights are on.
          */
         boolean isBrakingLightsOn();
 
         @Override
         DirectedPoint2d getLocation();
 
         @Override
         default double getZ()
         {
             return DrawLevel.GTU.getZ();
         }
 
         @Override
         default double getDirZ()
         {
             DirectedPoint2d p = getLocation();
             return p == null ? 0.0 : p.getDirZ();
         }
 
         /**
          * Returns the path.
          * @return path
          */
         default OtsLine2d getPath()
         {
             return null;
         }
 
         /**
          * Marker for GTU when zoomed out.
          */
         enum GtuMarker
         {
             /** Circle. */
             CIRCLE(new Ellipse2D.Double(0, 0, 0, 0)),
 
             /** Square. */
             SQUARE(new Rectangle2D.Double(0, 0, 0, 0));
 
             /** Shape. */
             private RectangularShape shape;
 
             /**
              * Constructor.
              * @param shape shape
              */
             GtuMarker(final RectangularShape shape)
             {
                 this.shape = shape;
             }
 
             /**
              * Returns the shape.
              * @return shape.
              */
             public RectangularShape getShape()
             {
                 return this.shape;
             }
         }
     }
 
 }