package org.opentrafficsim.road.gtu.animation;
   
   import java.awt.Color;
   import java.util.ArrayList;
   import java.util.List;
   
   import org.opentrafficsim.core.gtu.GTU;
   import org.opentrafficsim.core.gtu.animation.GTUColorer;
   import org.opentrafficsim.core.gtu.plan.tactical.TacticalPlanner;
  
  /**
   * Displays whether a GTU is blocking conflicts.
   * <p>
   * Copyright (c) 2013-2018 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 7 sep. 2018 <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 BlockingColorer implements GTUColorer
  {
  
      /** Blocking color. */
      private static final Color BLOCKING = Color.RED;
  
      /** Not blocking color. */
      private static final Color NOT_BLOCKING = Color.WHITE;
  
      /** Legend. */
      private static final List<LegendEntry> LEGEND = new ArrayList<>();
  
      static
      {
          LEGEND.add(new LegendEntry(Color.RED, "Not blocking", "Not blocking"));
          LEGEND.add(new LegendEntry(Color.WHITE, "Blocking", "Blocking"));
      }
  
      /** {@inheritDoc} */
      @Override
      public List<LegendEntry> getLegend()
      {
          return LEGEND;
      }
  
      /** {@inheritDoc} */
      @Override
      public Color getColor(final GTU gtu)
      {
          TacticalPlanner<?, ?> tact = gtu.getTacticalPlanner();
          if (tact instanceof Blockable && ((Blockable) tact).isBlocking())
          {
              return BLOCKING;
          }
          return NOT_BLOCKING;
      }
      
      /** {@inheritDoc} */
      @Override
      public String toString()
      {
          return "Blocking";
      }
  
  }