package org.opentrafficsim.core.gtu;
   
   import java.io.Serializable;
   
   import org.djunits.value.vdouble.scalar.Acceleration;
   import org.djunits.value.vdouble.scalar.Length;
   import org.djunits.value.vdouble.scalar.Speed;
   import org.djutils.exceptions.Throw;
   import org.opentrafficsim.core.distributions.ConstantGenerator;
  import org.opentrafficsim.core.distributions.Generator;
  
  /**
   * Stores some of the information that is needed to generate a GTU.
   * <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>
   * $LastChangedDate$, @version $Revision$, by $Author$, initial version Jul 8, 2014 <br>
   * @author <a href="https://github.com/averbraeck">Alexander Verbraeck</a>
   */
  public class GtuTemplate implements Serializable, Generator<GtuCharacteristics>
  {
      /** */
      private static final long serialVersionUID = 20141230L;
  
      /** The type of the GTU. */
      private final GtuType gtuType;
  
      /** Generator for the length of the GTU. */
      private final Generator<Length> lengthGenerator;
  
      /** Generator for the width of the GTU. */
      private final Generator<Length> widthGenerator;
  
      /** Generator for the maximum speed of the GTU. */
      private final Generator<Speed> maximumSpeedGenerator;
  
      /** Generator for the maximum acceleration of the GTU. */
      private final Generator<Acceleration> maxAcceleration;
  
      /** Generator for the maximum deceleration of the GTU. */
      private final Generator<Acceleration> maxDeceleration;
  
      /**
       * @param gtuType GtuType, the GtuType to make it identifiable.
       * @param lengthGenerator generator for the length of the GTU type (parallel with driving direction).
       * @param widthGenerator generator for the width of the GTU type (perpendicular to driving direction).
       * @param maximumSpeedGenerator generator for the maximum speed of the GTU type (in the driving direction).
       * @throws NullPointerException when one of the arguments is null
       */
      public GtuTemplate(final GtuType gtuType, final Generator<Length> lengthGenerator, final Generator<Length> widthGenerator,
              final Generator<Speed> maximumSpeedGenerator) throws NullPointerException
      {
          this(gtuType, lengthGenerator, widthGenerator, maximumSpeedGenerator,
                  new ConstantGenerator<>(Acceleration.instantiateSI(3.0)),
                  new ConstantGenerator<>(Acceleration.instantiateSI(-8.0)));
      }
  
      /**
       * @param gtuType GtuType, the GtuType to make it identifiable.
       * @param lengthGenerator generator for the length of the GTU type (parallel with driving direction).
       * @param widthGenerator generator for the width of the GTU type (perpendicular to driving direction).
       * @param maximumSpeedGenerator generator for the maximum speed of the GTU type (in the driving direction).
       * @param maximumAccelerationGenerator generator for the maximum acceleration of the GTU type
       * @param maximumDecelerationGenerator generator for the maximum deceleration of the GTU type
       * @throws NullPointerException when one of the arguments is null
       */
      public GtuTemplate(final GtuType gtuType, final Generator<Length> lengthGenerator, final Generator<Length> widthGenerator,
              final Generator<Speed> maximumSpeedGenerator, final Generator<Acceleration> maximumAccelerationGenerator,
              final Generator<Acceleration> maximumDecelerationGenerator) throws NullPointerException
      {
          Throw.whenNull(gtuType, "gtuType is null");
          Throw.whenNull(lengthGenerator, "lengthGenerator is null");
          Throw.whenNull(widthGenerator, "widthGenerator is null");
          Throw.whenNull(maximumSpeedGenerator, "maximumSpeedGenerator is null");
          Throw.whenNull(maximumAccelerationGenerator, "maximumAccelerationGenerator is null");
          Throw.whenNull(maximumDecelerationGenerator, "maximumDecelerationGenerator is null");
  
          this.gtuType = gtuType;
          this.lengthGenerator = lengthGenerator;
          this.widthGenerator = widthGenerator;
          this.maximumSpeedGenerator = maximumSpeedGenerator;
          this.maxAcceleration = maximumAccelerationGenerator;
          this.maxDeceleration = maximumDecelerationGenerator;
      }
  
      /**
       * Returns the same Characteristics, but pertaining to a different GTU type. This is useful for when the GTU type is used
       * for other purposes in simulation, where the {@code GtuCharacteristics} should be the same.
       * @param newGtuType the new GTU type.
       * @return Copy of this {@code TemplateGTUType} linked to the new GTU type.
       */
      public GtuTemplate copyForGtuType(final GtuType newGtuType)
      {
          return new GtuTemplate(newGtuType, this.lengthGenerator, this.widthGenerator, this.maximumSpeedGenerator,
                  this.maxAcceleration, this.maxDeceleration);
      }
  
      /**
      * Returns characteristics for the given GTU.
      * @return characteristics for the given GTU
      */
     @Override
     @SuppressWarnings("checkstyle:designforextension")
     public GtuCharacteristics draw()
     {
         Acceleration acceleration = this.maxAcceleration.draw();
         Acceleration deceleration = this.maxDeceleration.draw();
         Throw.when(acceleration.si <= 0, IllegalArgumentException.class, "Acceleration should be above 0.");
         Throw.when(deceleration.si >= 0, IllegalArgumentException.class, "Deceleration should be below 0.");
         Length length = this.lengthGenerator.draw();
         return new GtuCharacteristics(this.gtuType, length, this.widthGenerator.draw(), this.maximumSpeedGenerator.draw(),
                 acceleration, deceleration, length.times(0.75));
     }
 
     /**
      * @return gtuType.
      */
     @SuppressWarnings("checkstyle:designforextension")
     public GtuType getGtuType()
     {
         return this.gtuType;
     }
 
     @Override
     @SuppressWarnings("checkstyle:designforextension")
     public String toString()
     {
         return String.format("TemplateGTUType [%s, %s, %s, %s]", this.gtuType, this.lengthGenerator, this.widthGenerator,
                 this.maximumSpeedGenerator);
     }
 
 }