/**
    * 
    */
   package org.opentrafficsim.water.demand;
   
   import org.geotools.geometry.jts.JTSFactoryFinder;
   import org.jaitools.jts.CoordinateSequence2D;
   import org.opentrafficsim.water.AbstractNamed;
   import org.opentrafficsim.water.RepeatableRandomStream;
  
  import com.vividsolutions.jts.geom.Coordinate;
  import com.vividsolutions.jts.geom.Envelope;
  import com.vividsolutions.jts.geom.GeometryFactory;
  import com.vividsolutions.jts.geom.MultiPolygon;
  import com.vividsolutions.jts.geom.Point;
  
  import nl.tudelft.simulation.jstats.streams.StreamInterface;
  
  /**
   * A region that generates demand. Examples are municipalities or (in Europe), NUTS regions.
   * <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/docs/current/license.html">OpenTrafficSim License</a>.
   * </p>
   * <p>
   * Based on software from the IDVV project, which is Copyright (c) 2013 Rijkswaterstaat - Dienst Water, Verkeer en Leefomgeving
   * and licensed without restrictions to Delft University of Technology, including the right to sub-license sources and derived
   * products to third parties.
   * </p>
   * $LastChangedDate: 2015-07-24 02:58:59 +0200 (Fri, 24 Jul 2015) $, @version $Revision: 1147 $, by $Author: averbraeck $,
   * initial version Nov 6, 2016 <br>
   * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
   */
  public class Region extends AbstractNamed implements Comparable<Region>
  {
      /** */
      private static final long serialVersionUID = 1L;
  
      /** the region to whic this region belongs, e.g. Municipality - Province - Country. */
      private Region superRegion;
  
      /** the number of inhabitants in the region. */
      private double inhabitants;
  
      /** the number of jobs in the region. */
      private double jobs;
  
      /** the center of the region. */
      private Coordinate center;
  
      /** the shape of this region. */
      private MultiPolygon area;
  
      /** export ton/teu factor. */
      private double exportTonTEU;
  
      /** import ton/teu factor. */
      private double importTonTEU;
  
      /** export empty factor. */
      private double exportEmptyFactor;
  
      /** import empty factor. */
      private double importEmptyFactor;
  
      /** current Import TEU per year. */
      private double currentImportTEUperYear = 0;
  
      /** current Export TEU per year. */
      private double currentExportTEUperYear = 0;
  
      /** repeatable stream. */
      private static StreamInterface randomStream = null;
  
      /**
       * @param name the name of the region
       * @param superRegion the region of which this region is part; can be null
       * @param center the coordinate that denotes the center of the region
       */
      public Region(final String name, final Region superRegion, final Coordinate center)
      {
          super(name);
          this.superRegion = superRegion;
          this.center = center;
  
          randomStream = RepeatableRandomStream.create(this.getName());
      }
  
      /**
       * @return the superRegion
       */
      public final Region getSuperRegion()
      {
          return this.superRegion;
      }
  
      /**
       * @param jobs the jobs to set
       */
     public final void setJobs(final double jobs)
     {
         this.jobs = jobs;
     }
 
     /**
      * @return the jobs
      */
     public final double getJobs()
     {
         return (this.jobs > 0) ? this.jobs : 1;
     }
 
     /**
      * @return the center
      */
     public final Coordinate getCenter()
     {
         return this.center;
     }
 
     /**
      * @return the inhabitants
      */
     public final double getInhabitants()
     {
         return this.inhabitants;
     }
 
     /**
      * @param inhabitants set inhabitants
      */
     protected final void setInhabitants(final double inhabitants)
     {
         this.inhabitants = inhabitants;
     }
 
     /**
      * @return the exportTonTEU
      */
     public final double getExportTonTEU()
     {
         return this.exportTonTEU;
     }
 
     /**
      * @param exportTonTEU the exportTonTEU to set
      */
     public final void setExportTonTEU(final double exportTonTEU)
     {
         this.exportTonTEU = exportTonTEU;
     }
 
     /**
      * @return the importTonTEU
      */
     public final double getImportTonTEU()
     {
         return this.importTonTEU;
     }
 
     /**
      * @param importTonTEU the importTonTEU to set
      */
     public final void setImportTonTEU(final double importTonTEU)
     {
         this.importTonTEU = importTonTEU;
     }
 
     /**
      * @return the exportEmptyFactor
      */
     public final double getExportEmptyFactor()
     {
         return this.exportEmptyFactor;
     }
 
     /**
      * @param exportEmptyFactor the exportEmptyFactor to set
      */
     public final void setExportEmptyFactor(final double exportEmptyFactor)
     {
         this.exportEmptyFactor = exportEmptyFactor;
     }
 
     /**
      * @return the importEmptyFactor
      */
     public final double getImportEmptyFactor()
     {
         return this.importEmptyFactor;
     }
 
     /**
      * @param importEmptyFactor the importEmptyFactor to set
      */
     public final void setImportEmptyFactor(final double importEmptyFactor)
     {
         this.importEmptyFactor = importEmptyFactor;
     }
 
     /**
      * @return the currentExportTEUperYear
      */
     public final double getCurrentExportTEUperYear()
     {
         return this.currentExportTEUperYear;
     }
 
     /**
      * @param newExportTEUPerYear update currentExportTEUperYear
      */
     public final void setCurrentExportTEUperYear(final double newExportTEUPerYear)
     {
         this.currentExportTEUperYear = newExportTEUPerYear;
     }
 
     /**
      * @param newExportTEUPerYear add to currentExportTEUperYear
      */
     public final void addCurrentExportTEUperYear(final double newExportTEUPerYear)
     {
         this.currentExportTEUperYear += newExportTEUPerYear;
     }
 
     /**
      * @return the currentExportTEUperYear
      */
     public final double getCurrentImportTEUperYear()
     {
         return this.currentImportTEUperYear;
     }
 
     /**
      * @param newImportTEUPerYear update currentExportTEUperYear
      */
     public final void setCurrentImportTEUperYear(final double newImportTEUPerYear)
     {
         this.currentImportTEUperYear = newImportTEUPerYear;
     }
 
     /**
      * @param newImportTEUPerYear add to currentExportTEUperYear
      */
     public final void addCurrentImportTEUperYear(final double newImportTEUPerYear)
     {
         this.currentImportTEUperYear += newImportTEUPerYear;
     }
 
     /**
      * @return the area
      */
     public final MultiPolygon getArea()
     {
         return this.area;
     }
 
     /**
      * @param area the area to set
      */
     public final void setArea(final MultiPolygon area)
     {
         this.area = area;
     }
 
     /**
      * @return random point within a region
      */
     public final Coordinate getNextLocationInArea()
     {
         Envelope bounds = this.area.getEnvelopeInternal();
 
         GeometryFactory geometryFactory = JTSFactoryFinder.getGeometryFactory();
 
         Point p = new Point(new CoordinateSequence2D(0, 0), geometryFactory);
         while (!isInArea(p))
         {
             double latitude = bounds.getMinX() + (randomStream.nextDouble() * ((bounds.getMaxX() - bounds.getMinX())));
             double longitude = bounds.getMinY() + (randomStream.nextDouble() * ((bounds.getMaxY() - bounds.getMinY())));
 
             p = new Point(new CoordinateSequence2D(latitude, longitude), geometryFactory);
         }
 
         return p.getCoordinate();
     }
 
     /**
      * @param p point
      * @return whether point is within region bounds
      */
     public final boolean isInArea(final Point p)
     {
         return this.area.contains(p);
     }
 
     /** {@inheritDoc} */
     @Override
     public final int compareTo(final Region other)
     {
         return this.getName().compareTo(other.getName());
     }
 
     /** {@inheritDoc} */
     @Override
     @SuppressWarnings("checkstyle:designforextension")
     public String toString()
     {
         return "Region " + this.getName();
     }
 
 }