package org.kuali.student.lum.program.client.variation;
   
   import com.google.gwt.event.dom.client.ClickEvent;
   import com.google.gwt.event.dom.client.ClickHandler;
   import com.google.gwt.event.shared.HandlerManager;
   import com.google.gwt.user.client.ui.Anchor;
   import com.google.gwt.user.client.ui.HorizontalPanel;
   import com.google.gwt.user.client.ui.Label;
   import com.google.gwt.user.client.ui.Widget;
  
  import org.kuali.student.common.assembly.data.Data;
  import org.kuali.student.common.ui.client.application.ViewContext;
  import org.kuali.student.common.ui.client.mvc.DataModel;
  import org.kuali.student.common.ui.client.mvc.ModelRequestCallback;
  import org.kuali.student.common.ui.client.mvc.history.HistoryManager;
  import org.kuali.student.lum.common.client.widgets.AppLocations;
  import org.kuali.student.lum.program.client.ProgramConstants;
  import org.kuali.student.lum.program.client.ProgramController;
  import org.kuali.student.lum.program.client.events.ModelLoadedEvent;
  import org.kuali.student.lum.program.client.major.MajorController;
  import org.kuali.student.lum.program.client.properties.ProgramProperties;
  import org.kuali.student.lum.program.client.rpc.AbstractCallback;
  import org.kuali.student.lum.program.client.widgets.ProgramSideBar;
  
  import java.util.List;
  
  /**
   * @author Igor
   */
  public abstract class VariationController extends ProgramController {
  
      private String parentName;
  
      protected MajorController majorController;
  
      /**
       * Constructor.
       *
       * @param programModel
       * @param eventBus
       */
      public VariationController(DataModel programModel, ViewContext viewContext, HandlerManager eventBus, MajorController majorController) {
          super("", programModel, viewContext, eventBus);
          this.parentName = majorController.getName();
          this.majorController = majorController;
          setName(getProgramName());
          sideBar = new ProgramSideBar(eventBus, ProgramSideBar.Type.MAJOR);
          sideBar.initialize(majorController);
      }
  
      @Override
      protected void configureView() {
          setStatus();
          super.configureView();
          setContentTitle(getProgramName());
          addContentWidget(createParentAnchor());
          addContentWidget(createCommentPanel());
      }
  
      private Widget createParentAnchor() {
          HorizontalPanel anchorPanel = new HorizontalPanel();
          Anchor anchor = new Anchor(parentName);
          anchor.addClickHandler(new ClickHandler() {
              @Override
              public void onClick(ClickEvent event) {
                  navigateToParent();
              }
          });
          Label parentProgram = new Label(ProgramProperties.get().variation_parentProgram());
          parentProgram.addStyleName("parentProgram");
          anchorPanel.add(parentProgram);
          anchorPanel.add(anchor);
          return anchorPanel;
      }
  
      protected abstract void navigateToParent();
  
      @Override
      public String getProgramName() {
          String name = getStringProperty(ProgramConstants.LONG_TITLE);
          if (name == null) {
              return ProgramProperties.get().variation_new();
          }
          return ProgramProperties.get().variation_title(name);
      }
  
      @Override
      public void collectBreadcrumbNames(List<String> names) {
          names.add(parentName + "@" + HistoryManager.appendContext(AppLocations.Locations.VIEW_PROGRAM.getLocation(), getViewContext()));
          super.collectBreadcrumbNames(names);
      }
  
      /**
       * Loads data model from the server.
       *
       * @param callback we have to invoke this callback when model is loaded or failed.
       */
      @Override
      protected void loadModel(final ModelRequestCallback<DataModel> callback) {
         programRemoteService.getData(getViewContext().getId(), new AbstractCallback<Data>(ProgramProperties.get().common_retrievingData()) {
 
             @Override
             public void onFailure(Throwable caught) {
                 super.onFailure(caught);
                 callback.onRequestFail(caught);
             }
 
             @Override
             public void onSuccess(Data result) {
                 super.onSuccess(result);
                 programModel.setRoot(result);
                 callback.onModelReady(programModel);
                 eventBus.fireEvent(new ModelLoadedEvent(programModel));
             }
         });
     }
 }