package org.kuali.student.lum.lu.ui.course.client.controllers;

 import com.google.gwt.core.client.GWT;

 import com.google.gwt.core.client.RunAsyncCallback;

 import com.google.gwt.user.client.Window;

 import org.kuali.student.common.ui.client.application.Application;

 import org.kuali.student.common.ui.client.configurable.mvc.LayoutController;

 import org.kuali.student.common.ui.client.mvc.Callback;

 import org.kuali.student.common.ui.client.mvc.Controller;

 import org.kuali.student.common.ui.client.mvc.View;

 import org.kuali.student.common.ui.client.util.WindowTitleUtils;

 import org.kuali.student.common.ui.client.widgets.field.layout.element.SpanPanel;

 import org.kuali.student.lum.lu.ui.course.client.views.CategoryManagementView;

 import org.kuali.student.lum.lu.ui.course.client.views.CurriculumHomeView;

 import org.kuali.student.lum.lu.ui.main.client.controllers.ApplicationController;

 import org.kuali.student.lum.lu.ui.tools.client.configuration.CatalogBrowserController;

 import org.kuali.student.lum.lu.ui.tools.client.configuration.CluSetsManagementController;

 import org.kuali.student.lum.program.client.ProgramRegistry;

 import org.kuali.student.lum.program.client.core.CoreManager;

 import org.kuali.student.lum.program.client.credential.CredentialManager;

 import org.kuali.student.lum.program.client.major.MajorManager;

 /**

  * Curriculum home controller which controls the main LayoutController views of the lum application.  The

  * default view of this controller is the Curriculum Home Landing page.  The following views are views within

  * this controller's scope:<br>

  *                 COURSE_PROPOSAL<br>

         VIEW_COURSE<br>

         PROGRAM_VIEW<br>

         PROGRAM_EDIT<br>

         PROGRAM_CREATE<br>

         PROGRAM_VERSIONS<br>

         CLU_SETS<br>

         VARIATION_VIEW<br>

         VARIATION_EDIT<br>

         COURSE_CATALOG<br>

         LO_CATEGORIES<br>

         BACC_PROGRAM_VIEW<br>

         BACC_PROGRAM_EDIT<br>

         BACC_PROGRAM_VERSIONS<br>

         CORE_PROGRAM_VIEW<br>

         CORE_PROGRAM_EDIT<br>

         CORE_PROGRAM_VERSIONS<br>

  * These views can be accessed through links and searches provided by the CurriculumHomeView (the default view).

  * 

  * @author Kuali Student Team

  * @see CurriculumHomeView

  */

 public class CurriculumHomeController extends LayoutController {

     private CurriculumHomeView home;

     private final SpanPanel panel = new SpanPanel();

     private CourseProposalController courseProposalController;

     private LayoutController viewCourseController;

     private LayoutController manageCluSetsController;

     private LayoutController browseCatalogController;

     private MajorManager majorManager = new MajorManager();

     private CredentialManager credentialManager = new CredentialManager();

     private CoreManager coreManager = new CoreManager();

     private abstract class RunAsyncGetView implements RunAsyncCallback {

         public void onFailure(Throwable reason) {

             Window.alert("Download failed.  Please try again.");

         }

     }

     public enum LUMViews {

         DEFAULT,

         COURSE_PROPOSAL,

         VIEW_COURSE,

         PROGRAM_VIEW,

         PROGRAM_EDIT,

         PROGRAM_SPEC_EDIT,

         PROGRAM_CREATE,

         PROGRAM_VERSIONS,

         CLU_SETS,

         VARIATION_VIEW,

         VARIATION_EDIT,

         COURSE_CATALOG,

         LO_CATEGORIES,

         BACC_PROGRAM_VIEW,

         BACC_PROGRAM_EDIT,

         BACC_PROGRAM_VERSIONS,

         CORE_PROGRAM_VIEW,

         CORE_PROGRAM_EDIT,

         CORE_PROGRAM_VERSIONS

     }

     public CurriculumHomeController(Controller controller, String name, Enum<?> viewType) {

         super();

         super.setController(controller);

         super.setName(name);

         super.setViewEnum(viewType);

         this.setDefaultView(LUMViews.DEFAULT);

         this.initWidget(panel);

         setupDefaultView();

     }

     private void setupDefaultView() {

         home = new CurriculumHomeView(this, LUMViews.DEFAULT);

     }

     @Override

     public <V extends Enum<?>> void getView(V viewType, final Callback<View> callback) {

         //this is done so the views can have delayed loading

         switch ((LUMViews) viewType) {

             case DEFAULT:

                 callback.exec(home);

                 break;

             case COURSE_PROPOSAL:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(getCourseProposalController());

                     }

                 });

                 break;

             case VIEW_COURSE:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(getViewCourseController());

                     }

                 });

                 break;

             case PROGRAM_VIEW:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         if (ProgramRegistry.isCreateNew()) {

                             ProgramRegistry.setCreateNew(false);

                             majorManager = new MajorManager();

                         }

                         callback.exec(majorManager.getProgramViewController());

                     }

                 });

                 break;

             case PROGRAM_EDIT:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                             Application.getApplicationContext().setParentPath("");//Reset the parent path when navigating back

                         if (ProgramRegistry.isCreateNew()) {

                             ProgramRegistry.setCreateNew(false);

                             majorManager = new MajorManager();

                         }

                         callback.exec(majorManager.getProgramEditController());

                     }

                 });

                 break;

             case PROGRAM_SPEC_EDIT:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         if (ProgramRegistry.isCreateNew()) {

                             ProgramRegistry.setCreateNew(false);

                             majorManager = new MajorManager();

                         }

                         callback.exec(majorManager.getProgramSpecEditController());

                     }

                 });

                 break;                

             case PROGRAM_CREATE:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         majorManager = new MajorManager();

                         callback.exec(majorManager.getProgramEditController());

                     }

                 });

                 break;

             case PROGRAM_VERSIONS:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(majorManager.getProgramVersionsController());

                     }

                 });

                 break;

             case CLU_SETS:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(getCluSetsController());

                     }

                 });

                 break;

             case COURSE_CATALOG:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(getBrowseCatalogController());

                     }

                 });

                 break;

             case VARIATION_VIEW:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(majorManager.getVariationViewController());

                     }

                 });

                 break;

             case VARIATION_EDIT:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(majorManager.getVariationEditController());

                     }

                 });

                 break;

             case CORE_PROGRAM_VIEW:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         if (ProgramRegistry.isCreateNew()) {

                             ProgramRegistry.setCreateNew(false);

                             coreManager = new CoreManager();

                         }

                         callback.exec(coreManager.getViewController());

                     }

                 });

                 break;

             case CORE_PROGRAM_EDIT:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(coreManager.getEditController());

                     }

                 });

                 break;

             case CORE_PROGRAM_VERSIONS:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(coreManager.getProgramVersionsController());

                     }

                 });

                 break;

             case BACC_PROGRAM_VIEW:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         if (ProgramRegistry.isCreateNew()) {

                             ProgramRegistry.setCreateNew(false);

                             credentialManager = new CredentialManager();

                         }

                         callback.exec(credentialManager.getBaccViewController());

                     }

                 });

                 break;

             case BACC_PROGRAM_EDIT:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(credentialManager.getBaccEditController());

                     }

                 });

                 break;

             case BACC_PROGRAM_VERSIONS:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(credentialManager.getProgramVersionsController());

                     }

                 });

                 break;

             case LO_CATEGORIES:

                 GWT.runAsync(new RunAsyncGetView() {

                     @Override

                     public void onSuccess() {

                         callback.exec(getCategoryManagementController());

                     }

                 });

                 break;

             default:

                 callback.exec(home);

         }

     }

     private View getCategoryManagementController() {

         return new CategoryManagementView(this, "Learning Objective Categories", LUMViews.LO_CATEGORIES);

     }

     private CourseProposalController getCourseProposalController() {

         courseProposalController = new CourseProposalController();

         return courseProposalController;

     }

     private LayoutController getViewCourseController() {

         if (viewCourseController == null) {

             viewCourseController = new ViewCourseParentController();

         }

         return this.viewCourseController;

     }

     private LayoutController getCluSetsController() {

         manageCluSetsController = new CluSetsManagementController();

         return manageCluSetsController;

     }

     private LayoutController getBrowseCatalogController() {

         browseCatalogController = new CatalogBrowserController(this);

         return browseCatalogController;

     }

     @Override

     protected void hideView(View view) {

         ApplicationController.getApplicationViewContainer().clear();

     }

     @Override

     protected void renderView(View view) {

         ApplicationController.getApplicationViewContainer().add(view.asWidget());

     }

     @Override

     public Enum<?> getViewEnumValue(String enumValue) {

         return LUMViews.valueOf(enumValue);

     }

     @Override

     public void updateModel() {

         // No model needed here

     }

     public <V extends Enum<?>> void showView(V viewType, Callback<Boolean> onReadyCallback) {

         if (viewType == LUMViews.DEFAULT) {

             WindowTitleUtils.setContextTitle(name);

         }

         super.showView(viewType, onReadyCallback);

     }

 }