package org.opentrafficsim.road.gtu.lane.perception.mental;
   
   import java.util.Iterator;
   import java.util.LinkedHashMap;
   import java.util.Map;
   
   import org.djunits.value.vdouble.scalar.Length;
   import org.opentrafficsim.base.parameters.ParameterException;
   import org.opentrafficsim.base.parameters.Parameters;
  import org.opentrafficsim.core.gtu.GtuException;
  import org.opentrafficsim.core.gtu.RelativePosition;
  import org.opentrafficsim.road.gtu.lane.LaneBasedGtu;
  import org.opentrafficsim.road.gtu.lane.perception.LanePerception;
  import org.opentrafficsim.road.gtu.lane.perception.RelativeLane;
  import org.opentrafficsim.road.gtu.lane.perception.structure.NavigatingIterable.Entry;
  import org.opentrafficsim.road.network.lane.object.Distraction;
  
  /**
   * Task-demand for road-side distraction.
   * <p>
   * Copyright (c) 2013-2024 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 <a href="https://github.com/averbraeck">Alexander Verbraeck</a>
   * @author <a href="https://github.com/peter-knoppers">Peter Knoppers</a>
   * @author <a href="https://github.com/wjschakel">Wouter Schakel</a>
   */
  public class TaskRoadSideDistraction extends AbstractTask
  {
  
      /** Odometer values at distraction. */
      private Map<Distraction, Double> odos = new LinkedHashMap<>();
  
      /** Constructor. */
      public TaskRoadSideDistraction()
      {
          super("road-side distraction");
      }
  
      @Override
      public double calculateTaskDemand(final LanePerception perception, final LaneBasedGtu gtu, final Parameters parameters)
              throws ParameterException, GtuException
      {
          double odo = gtu.getOdometer().si;
  
          for (RelativeLane lane : perception.getLaneStructure().getRootCrossSection())
          {
              for (Entry<Distraction> distraction : perception.getLaneStructure().getDownstreamObjects(lane, Distraction.class,
                      RelativePosition.FRONT, false))
              {
                  this.odos.put(distraction.object(), odo + distraction.distance().si);
              }
          }
  
          // loop over all distractions in odos
          Iterator<Distraction> it = this.odos.keySet().iterator();
          double demand = 0.0;
          while (it.hasNext())
          {
              Distraction next = it.next();
              Double distraction = next.getDistraction(Length.instantiateSI(odo - this.odos.get(next)));
              if (distraction == null)
              {
                  it.remove();
              }
              else
              {
                  demand += distraction;
              }
          }
          return demand;
      }
  
  }