package org.opentrafficsim.sim0mq.publisher;
   
   import java.rmi.RemoteException;
   
   import org.djunits.unit.DirectionUnit;
   import org.djunits.unit.PositionUnit;
   import org.djunits.value.vdouble.scalar.Direction;
   import org.djunits.value.vdouble.vector.PositionVector;
   import org.djutils.draw.point.OrientedPoint2d;
  import org.djutils.metadata.MetaData;
  import org.djutils.metadata.ObjectDescriptor;
  import org.djutils.serialization.SerializationException;
  import org.opentrafficsim.core.gtu.Gtu;
  import org.opentrafficsim.core.network.Network;
  import org.sim0mq.Sim0MQException;
  
  /**
   * Transceiver for GTU data.
   * <p>
   * Copyright (c) 2020-2024 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 GtuTransceiver extends AbstractEventTransceiver
  {
      /** The network. */
      private final Network network;
  
      /** Transceiver for the GTU ids. */
      private final TransceiverInterface gtuIdSource;
  
      /**
       * Construct a GtuTransceiver.
       * @param network the Network
       * @param gtuIdSource the transceiver that can produce all active GTU ids in the Network
       */
      public GtuTransceiver(final Network network, final GtuIdTransceiver gtuIdSource)
      {
          super("GTU transceiver", new MetaData("GTU id", "GTU id",
                  new ObjectDescriptor[] {new ObjectDescriptor("GTU id", "GTU id", String.class)}), Gtu.MOVE_EVENT);
          this.network = network;
          this.gtuIdSource = gtuIdSource;
      }
  
      @Override
      public final TransceiverInterface getIdSource(final int addressLevel, final ReturnWrapper returnWrapper)
              throws Sim0MQException, SerializationException
      {
          if (addressLevel != 0)
          {
              returnWrapper.encodeReplyAndTransmit("Only empty address is valid");
              throw new IndexOutOfBoundsException("Only empty address is valid");
          }
          return this.gtuIdSource;
      }
  
      @Override
      public boolean hasIdSource()
      {
          return true;
      }
  
      @Override
      public final Object[] get(final Object[] address, final ReturnWrapper returnWrapper)
              throws RemoteException, Sim0MQException, SerializationException
      {
          String bad = verifyMetaData(getAddressFields(), address);
          if (bad != null)
          {
              returnWrapper.nack(bad);
              return null;
          }
  
          Gtu gtu = this.network.getGTU((String) address[0]);
          if (null == gtu)
          {
              returnWrapper.nack("No GTU found with id \"" + address[0] + "\"");
              return null;
          }
          OrientedPoint2d gtuPosition = gtu.getLocation();
          return new Object[] {gtu.getId(), gtu.getType().getId(),
                  new PositionVector(new double[] {gtuPosition.x, gtuPosition.y}, PositionUnit.METER),
                  new Direction(gtuPosition.getDirZ(), DirectionUnit.EAST_DEGREE), gtu.getSpeed(), gtu.getAcceleration()};
      }
  
      @Override
      public String toString()
      {
          return "GtuTransceiver [network=" + this.network.getId() + ", super=" + super.toString() + "]";
      }
  
  }