package cz.cuni.amis.pogamut.sposh.elements;
   
   import cz.cuni.amis.pogamut.sposh.exceptions.CycleException;
   import cz.cuni.amis.pogamut.sposh.exceptions.DuplicateNameException;
   import cz.cuni.amis.pogamut.sposh.exceptions.FubarException;
   import cz.cuni.amis.pogamut.sposh.exceptions.InvalidNameException;
   import cz.cuni.amis.pogamut.sposh.executor.IWorkExecutor;
   import java.awt.datatransfer.DataFlavor;
   import java.util.Collections;
  import java.util.List;
  
  /**
   * Triggered action is basically a call of some other entity that is supposed to
   * be executed. The other entity can be action (through {@link IWorkExecutor}, {@link Competence}
   * or {@link ActionPattern}. The call needs name of a callee and possibly some
   * arguments to pass.
   * <p/>
   * How is the target determined? Engine takes the name and checks if there is a {@link Competence}
   * or {@link ActionPattern} with same name (names of all C and AP are unique,
   * otherwise they get {@link DuplicateNameException}). If there is, the action
   * will execute the found C/AP. If there is no such C/AP, it assumes that is is
   * a name of an action so it tries to use {@link IWorkExecutor}. If that fails,
   * stop the bot.
   * <p/>
   * Note that we do not allow cycles (thx to {@link CycleException}).
   *
   * @author HonzaH
   */
  public class TriggeredAction extends PoshDummyElement implements IReferenceElement, INamedElement {
  
      private PrimitiveCall actionCall;
      public static final DataFlavor dataFlavor = new DataFlavor(TriggeredAction.class, "triggered_action");
      public static final String taName = "taName";
      public static final String taArgs = "taAruments";
  
      TriggeredAction(String actionName) {
          this.actionCall = new PrimitiveCall(actionName);
      }
  
      TriggeredAction(PrimitiveCall actionCall) {
          this.actionCall = actionCall;
      }
  
      @Override
      public List<PoshElement> getChildDataNodes() {
          return Collections.<PoshElement>emptyList();
      }
  
      @Override
      public String toString() {
          return actionCall.toString();
      }
  
      @Override
      public String getName() {
          return actionCall.getName();
      }
  
      public PrimitiveCall getActionCall() {
          return actionCall;
      }
  
      /**
       * Set name of the action.
       *
       * @param newName New name of an action
       * @throws InvalidNameException If name is not valid
       * @throws CycleException if namechange would cause a cycle.
       */
      public void setActionName(String newName) throws InvalidNameException, CycleException {
          newName = newName.trim();
  
          if (!newName.matches(IDENT_PATTERN)) {
              throw InvalidNameException.create(newName);
          }
  
          String oldName = this.getName();
          this.actionCall = new PrimitiveCall(newName, actionCall.getParameters());
  
          if (getRootNode() != null && getRootNode().isCycled()) {
              this.actionCall = new PrimitiveCall(oldName, actionCall.getParameters());
              throw CycleException.createFromName(newName);
          }
          firePropertyChange(taName, oldName, newName);
      }
  
      @Override
      public boolean moveChild(int newIndex, PoshElement child) {
          throw new UnsupportedOperationException();
      }
  
      @Override
      public DataFlavor getDataFlavor() {
          return dataFlavor;
      }
  
      @Override
      public LapType getType() {
          return LapType.ACTION;
     }
     
     /**
      * Take @source action and set all properties (name, parameters...) to be
      * same as the @source. All changes will be emitted.
      *
      * @param source The source of the data this action will synchronize to.
      */
     public void synchronize(TriggeredAction source) throws CycleException {
         try {
             this.setActionName(source.getName());
             Arguments sourceArguments = source.getActionCall().getParameters();
             setArguments(new Arguments(sourceArguments));
         } catch (InvalidNameException ex) {
             throw new FubarException("Name of the source action \"" + source.getName() + "\" is not valid for this action.", ex);
         }
     }
 
     /**
      * Get parameters that can be used as arguments of the action call. The
      * parameters are specified in after the "vars" keyword in the parent.
      *
      * @return List of parameters. If element doesn't have parameters, null.
      */
     private FormalParameters getElementParameters(PoshElement element) {
         assert element != null;
         
         if (element instanceof DriveElement) {
             return new FormalParameters();
         }
         if (element instanceof CompetenceElement) {
             CompetenceElement cel = (CompetenceElement) element;
             Competence competence = cel.getParent();
             return competence.getParameters();
         }
         if (element instanceof ActionPattern) {
             ActionPattern ap = (ActionPattern) element;
             return ap.getParameters();
         }
         return null;
     }
     
     /**
      * Action basically consists from
      */
     public void setArguments(Arguments newArguments) {
         String actionName = actionCall.getName();
         Arguments oldArguments = actionCall.getParameters();
         this.actionCall = new PrimitiveCall(actionName, newArguments);
 
         // TODO: Check that all variables used as values in the newArguments are present in the parameters of parent, use getParentParameters().
         
         firePropertyChange(taArgs, oldArguments, newArguments);
     }
 
     /**
      * Get arguments of this action.
      *
      * @return Arguments of the action.
      */
     @Override
     public Arguments getArguments() {
         return this.actionCall.getParameters();
     }
 }