package org.opentrafficsim.kpi.sampling.meta;
   
   import java.util.HashSet;
   import java.util.Iterator;
   import java.util.Set;
   
   import org.djutils.exceptions.Throw;
   import org.opentrafficsim.kpi.interfaces.GtuDataInterface;
   import org.opentrafficsim.kpi.sampling.CrossSection;
  import org.opentrafficsim.kpi.sampling.KpiDirectedLanePosition;
  import org.opentrafficsim.kpi.sampling.TrajectoryAcceptList;
  import org.opentrafficsim.kpi.sampling.TrajectoryGroup;
  
  /**
   * Accepts trajectories that have passed all cross sections as defined in a query.
   * <p>
   * Copyright (c) 2013-2019 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 Sep 29, 2016 <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 MetaDataCrossSections extends MetaDataType<CrossSection>
  {
  
      /**
       * 
       */
      public MetaDataCrossSections()
      {
          super("crossSection");
      }
  
      /** {@inheritDoc} */
      @Override
      public final CrossSection getValue(final GtuDataInterface gtu)
      {
          return null;
      }
  
      /** {@inheritDoc} */
      @Override
      public String formatValue(String format, CrossSection value)
      {
          StringBuilder str = new StringBuilder();
          str.append("[");
          String delimiter = "";
          for (KpiDirectedLanePosition kpiDirectedLanePosition : value.getDirectedLanePositions())
          {
              str.append(delimiter);
              delimiter = "|";
              str.append(kpiDirectedLanePosition.getLaneData().getId());
              str.append(kpiDirectedLanePosition.getKpiGtuDirection().isPlus() ? "+" : "-");
              str.append(String.format(format, kpiDirectedLanePosition.getPosition().si));
          }
          str.append("]");
          return str.toString();
      }
  
      /**
       * Accepts all trajectory's or rejects all trajectory's depending on whether all cross sections have been crossed.
       */
      @Override
      public final void accept(final TrajectoryAcceptList trajectoryAcceptList, final Set<CrossSection> querySet)
      {
          Throw.whenNull(trajectoryAcceptList, "Trajectory accept list may not be null.");
          Throw.whenNull(querySet, "Qeury set may not be null.");
          Set<CrossSection> crossedCrossSections = new HashSet<>();
          // Loop over trajectoryList/trajectoryGroupList combo
          for (int i = 0; i < trajectoryAcceptList.size(); i++)
          {
              TrajectoryGroup trajectoryGroup = trajectoryAcceptList.getTrajectoryGroup(i);
              // Loop over cross sections
              Iterator<CrossSection> crossSectionIterator = querySet.iterator();
              while (crossSectionIterator.hasNext())
              {
                  CrossSection crossSection = crossSectionIterator.next();
                  // Loop over lanes in cross section
                  Iterator<KpiDirectedLanePosition> directedLanePositionIterator = crossSection.getIterator();
                  while (directedLanePositionIterator.hasNext())
                  {
                      KpiDirectedLanePosition directedLanePosition = directedLanePositionIterator.next();
                      // If Trajectories is of same lane and direction, check position
                      if (trajectoryGroup.getLaneDirection().getLaneData().equals(directedLanePosition.getLaneData())
                              && trajectoryGroup.getLaneDirection().getKpiDirection()
                                      .equals(directedLanePosition.getKpiGtuDirection()))
                      {
                          double position = directedLanePosition.getPosition().si;
                          float[] x = trajectoryAcceptList.getTrajectory(i).getX();
                          double xStart = x[0];
                          double xEnd = x[x.length - 1];
                          if ((xStart < position && position < xEnd) || (xEnd < position && position < xStart))
                          {
                              // Trajectory was up- and downstream of the location, so the location was crossed
                              crossedCrossSections.add(crossSection);
                          }
                      }
                 }
             }
         }
         if (querySet.equals(crossedCrossSections))
         {
             trajectoryAcceptList.acceptAll();
         }
     }
 
     /** {@inheritDoc} */
     @Override
     @SuppressWarnings("checkstyle:designforextension")
     public String toString()
     {
         return "MetaDataCrossSections: [id=" + getId() + "]";
     }
 
 }