package org.opentrafficsim.core.network.factory.xml.units;
   
   import java.util.HashMap;
   import java.util.Map;
   
   import org.djunits.unit.AngleUnit;
   import org.djunits.unit.DirectionUnit;
   import org.djunits.unit.UNITS;
   import org.djunits.value.AngleUtil;
  import org.djunits.value.vdouble.scalar.Angle;
  import org.djunits.value.vdouble.scalar.Direction;
  import org.opentrafficsim.core.network.NetworkException;
  
  /**
   * Parser for angle with unit.
   * <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/docs/license.html">OpenTrafficSim License</a>.
   * <p>
   * $LastChangedDate: 2015-07-24 02:58:59 +0200 (Fri, 24 Jul 2015) $, @version $Revision: 1147 $, by $Author: averbraeck $,
   * initial version Jul 23, 2015 <br>
   * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
   */
  public final class AngleUnits implements UNITS
  {
      /** The angle units. */
      public static final Map<String, AngleUnit> ANGLE_UNITS = new HashMap<>();
  
      /** The direction units. */
      public static final Map<String, DirectionUnit> DIRECTION_UNITS = new HashMap<>();
  
      static
      {
          ANGLE_UNITS.put("deg", DEGREE);
          ANGLE_UNITS.put("rad", RADIAN);
  
          DIRECTION_UNITS.put("deg", DirectionUnit.EAST_DEGREE);
          DIRECTION_UNITS.put("rad", DirectionUnit.EAST_RADIAN);
      }
  
      /** Utility class cannot be instantiated. */
      private AngleUnits()
      {
          // do not instantiate
      }
  
      /**
       * @param s String; the string to parse
       * @return the unit as a String in the Map.
       * @throws NetworkException when parsing fails
       */
      public static String parseAngleUnit(final String s) throws NetworkException
      {
          String u = null;
          for (String us : ANGLE_UNITS.keySet())
          {
              if (s.toString().contains(us))
              {
                  if (u == null || us.length() > u.length())
                  {
                      u = us;
                  }
              }
          }
          if (u == null)
          {
              throw new NetworkException("Parsing network: cannot instantiate angle unit in: " + s);
          }
          return u;
      }
  
      /**
       * @param s String; the string to parse
       * @return the next value.
       * @throws NetworkException when parsing fails
       */
      public static Angle parseAngle(final String s) throws NetworkException
      {
          String us = parseAngleUnit(s);
          AngleUnit u = ANGLE_UNITS.get(us);
          String sv = s.substring(0, s.indexOf(us));
          try
          {
              double value = Double.parseDouble(sv);
              Angle angle = new Angle(value, u);
              return new Angle(AngleUtil.normalize(angle).si, AngleUnit.SI);
          }
          catch (NumberFormatException nfe)
          {
              throw new NetworkException("Parsing network: cannot instantiate scalar: " + s, nfe);
          }
      }
  
      /**
       * @param s String; the string to parse
       * @return the unit as a String in the Map.
       * @throws NetworkException when parsing fails
       */
      public static String parseDirectionUnit(final String s) throws NetworkException
     {
         String u = null;
         for (String us : DIRECTION_UNITS.keySet())
         {
             if (s.toString().contains(us))
             {
                 if (u == null || us.length() > u.length())
                 {
                     u = us;
                 }
             }
         }
         if (u == null)
         {
             throw new NetworkException("Parsing network: cannot instantiate direction unit in: " + s);
         }
         return u;
     }
 
     /**
      * @param s String; the string to parse
      * @return the next value.
      * @throws NetworkException when parsing fails
      */
     public static Direction parseDirection(final String s) throws NetworkException
     {
         String us = parseDirectionUnit(s);
         DirectionUnit u = DIRECTION_UNITS.get(us);
         String sv = s.substring(0, s.indexOf(us));
         try
         {
             double value = Double.parseDouble(sv);
             Direction direction = new Direction(value, u);
             return new Direction(AngleUtil.normalize(direction).si, DirectionUnit.EAST_RADIAN);
         }
         catch (NumberFormatException nfe)
         {
             throw new NetworkException("Parsing network: cannot instantiate scalar: " + s, nfe);
         }
     }
 
 }