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

 import java.util.ArrayList;

 import java.util.List;

 import org.kuali.student.common.assembly.data.QueryPath;

 import org.kuali.student.common.dto.DtoConstants;

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

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

 import org.kuali.student.common.ui.client.configurable.mvc.sections.BaseSection;

 import org.kuali.student.common.ui.client.configurable.mvc.sections.Section;

 import org.kuali.student.common.ui.client.event.ActionEvent;

 import org.kuali.student.common.ui.client.event.SaveActionEvent;

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

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

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

 import org.kuali.student.common.ui.client.widgets.KSButton;

 import org.kuali.student.common.ui.client.widgets.menus.KSMenuItemData;

 import org.kuali.student.common.ui.client.widgets.notification.KSNotifier;

 import org.kuali.student.common.ui.shared.IdAttributes.IdType;

 import org.kuali.student.core.workflow.ui.client.widgets.WorkflowUtilities;

 import org.kuali.student.lum.common.client.widgets.AppLocations;

 import org.kuali.student.lum.lu.LUConstants;

 import org.kuali.student.lum.lu.assembly.data.client.constants.orch.CreditCourseConstants;

 import org.kuali.student.lum.lu.ui.course.client.configuration.CourseAdminConfigurer;

 import org.kuali.student.lum.lu.ui.course.client.widgets.CourseWorkflowActionList;

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

 import com.google.gwt.event.dom.client.ClickEvent;

 import com.google.gwt.event.dom.client.ClickHandler;

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

 /**

  * Controller for create/modify course with proposal wrapper admin screens. This controller uses a different

  * configurer for admin screens and attempts to reuse as much of the validation, save & retreive logic coded

  * in the CourseProposalController.  Also it reuses the menu from CourseProposalController and adds click

  * handlers to button menu to navigate user b/w sections of the same view.

  * 

  * @author Will

  *

  */

 public class CourseAdminController extends CourseProposalController{

         List<KSButton> cancelButtons = new ArrayList<KSButton>();

         /**

          * Override the intitailzeController method to use CourseAdminConfigurer 

          */

         @Override

         protected void initializeController() {

                 super.cfg = GWT.create(CourseAdminConfigurer.class);

                 super.proposalPath = cfg.getProposalPath();

                    super.workflowUtil = new WorkflowUtilities(CourseAdminController.this ,proposalPath);

                    cfg.setState(DtoConstants.STATE_DRAFT.toUpperCase());

                    cfg.setNextState(DtoConstants.STATE_APPROVED.toUpperCase());

                    super.setDefaultModelId(cfg.getModelId());

                    super.registerModelsAndHandlers();

                    super.addStyleName("ks-course-admin");

                    currentDocType = LUConstants.PROPOSAL_TYPE_COURSE_CREATE_ADMIN;

                    //this.removeMenu();                                                

     }

         /**

          * Override the getSaveButton to provide a new set of buttons for the admin screens

          */

         @Override

         public KSButton getSaveButton(){

                 return new KSButton("Save", new ClickHandler(){

             public void onClick(ClickEvent event) {

                     handleButtonClick(DtoConstants.STATE_DRAFT);                    

             }

         });                

         }

         public KSButton getApproveButton(){

                 return new KSButton("Approve", new ClickHandler(){

             public void onClick(ClickEvent event) {       

                     handleButtonClick(DtoConstants.STATE_APPROVED);

             }

         });

     }

         public KSButton getApproveAndActivateButton(){

                 return new KSButton("Approve and Activate", new ClickHandler(){

             public void onClick(ClickEvent event) {

                     handleButtonClick(DtoConstants.STATE_ACTIVE);

             }

         });                

         }

         public KSButton getCancelButton(){

                 KSButton cancelButton = new KSButton("Cancel Proposal", new ClickHandler(){

             public void onClick(ClickEvent event) {

                     //Cancel the proposal and navigate the user back to curriculum home if cancel was successful.

                     workflowUtil.cancel(new Callback<Boolean>(){

                                         @Override

                                         public void exec(Boolean result) {

                                                 if (result){

                                                         Application.navigate(AppLocations.Locations.CURRICULUM_MANAGEMENT.getLocation());                                                        

                                                 }                                                

                                         }

                     });

             }

         });

                 if (LUConstants.PROPOSAL_TYPE_COURSE_CREATE_ADMIN.equals(currentDocType)){

                         //For new admin proposal, disable the cancel button intially since proposal doesn't exist

                         //until they click save.

                         cancelButton.setEnabled(false);

                 }

                 cancelButtons.add(cancelButton);

                 return cancelButton;

     }

         /**

          * This processes the save, approve, or approve and activate button clicks. The action is determined

          * by the value of the state parameter.

          * 

          * @param state The state to set on the course when saving course data. DRAFT=Save, APPROVED=Approve, and

          * ACTIVE=Approve & Activate

          */

         protected void handleButtonClick(final String state){

             cluProposalModel.set(QueryPath.parse(CreditCourseConstants.STATE), state);

             final SaveActionEvent saveActionEvent = new SaveActionEvent(false);

             if (DtoConstants.STATE_APPROVED.equalsIgnoreCase(state) || DtoConstants.STATE_ACTIVE.equalsIgnoreCase(state)){

                 // For "Approve" and "Approve & Activate" actions, automatically blanket approve the admin proposal so it 

                 // enters final state. This is accomplished by first saving the course (via saveActionEvent) and then by 

                 // executing the the blanket approve call upon a successful save. When user clicks either of these buttons 

                 // and blanket approve is successful, they are navigated to the view course screen.

                     saveActionEvent.setActionCompleteCallback(new ActionCompleteCallback(){

                                 @Override

                                 public void onActionComplete(ActionEvent actionEvent) {

                                         if (saveActionEvent.isSaveSuccessful()){

                                                 workflowUtil.blanketApprove(new Callback<Boolean>(){

                                                         @Override

                                                         public void exec(Boolean result) {

                                                             // FIXME:  Even though workflow rpc call to blanket approve is successful, the

                                                                 // asynchronous nature of workflow is causing timing issues here. Need to investigate

                                                             // making blanket approve workflow more synchronous to avoid the timing issues.

                                                                 // NOTE: One solution is to not allow an activate here, and force user to activate from view

                                                                 // screen, the down side being user now requires two clicks.

                                                                 final ViewContext viewContext = new ViewContext();

                                                 viewContext.setId((String)cluProposalModel.get(CreditCourseConstants.ID));

                                                 viewContext.setIdType(IdType.OBJECT_ID);                                                                                                                        

                                                                 if (DtoConstants.STATE_APPROVED.equalsIgnoreCase(state)){

                                                                         KSNotifier.show("Course approved. It may take a minute or two for course status to be updated. Refresh to see latest status.");

                                                                         Application.navigate(AppLocations.Locations.VIEW_COURSE.getLocation(), viewContext);

                                                                 } else if (DtoConstants.STATE_ACTIVE.equalsIgnoreCase(state)){

                                                                         //For "Approve and Activate", call change state rpc method to properly activate the course

                                                                         CourseWorkflowActionList.setCourseState(viewContext.getId(), DtoConstants.STATE_ACTIVE, new Callback<String>(){

                                                                                 @Override

                                                                                 public void exec(String result) {

                                                                                         if (result == null){

                                                                                                 KSNotifier.show("Course approved, but activation failed.");

                                                                                         } else {

                                                                                                 KSNotifier.show("Course approved and activated. It may take a minute or two for course status to be updated. Refresh to see latest status.");                                                                        

                                                                                         }

                                                                                         Application.navigate(AppLocations.Locations.VIEW_COURSE.getLocation(), viewContext);

                                                                                 }

                                                                         });                                                        

                                                                 }

                                                         }

                                                 });

                                         }      

                                 }

                     });

             } else {

                     //For a save event all this does is enable the cancel button to allow user to cancel the proposal.

                     saveActionEvent.setActionCompleteCallback(new ActionCompleteCallback(){

                                 @Override

                                 public void onActionComplete(ActionEvent action) {

                                         for (KSButton cancelButton:cancelButtons){

                                                 cancelButton.setEnabled(true);

                                         }                                        

                                 }                            

                     });

             }

         CourseAdminController.this.fireApplicationEvent(saveActionEvent);                

         }

         /**

      * Override the setHeaderTitle to display proper header title for admin screens

      */

         @Override

         protected void setHeaderTitle(){

             String title;

             if (cluProposalModel.get(cfg.getProposalTitlePath()) != null){

                     title = getProposalTitle();

             }

             else{

                     title = "New Course (Admin Proposal)";

             }

             this.setContentTitle(title);

             this.setName(title);

             WindowTitleUtils.setContextTitle(title);

                 currentTitle = title;

     }

         private String getProposalTitle(){

                 StringBuffer sb = new StringBuffer();

                 sb.append(cluProposalModel.get(cfg.getProposalTitlePath()));

                 sb.append(" (Admin Proposal)");

                 return sb.toString();

         }

         /**

          * This is a special method for CourseAdminController, which adds a menu item to the navigation menu and navigates

          * a user to a section within the view rather than a different view.

          * 

          * @param parentMenu

          * @param sectionName

          * @param sectionId

          * @param section

          */

     public void addMenuItemSection(String parentMenu, final String sectionName, final String sectionId, final Section section) {            

         KSMenuItemData parentItem = null;

         for (int i = 0; i < topLevelMenuItems.size(); i++) {

             if (topLevelMenuItems.get(i).getLabel().equals(parentMenu)) {

                 parentItem = topLevelMenuItems.get(i);

                 break;

             }

         }

         KSMenuItemData item = new KSMenuItemData(sectionName);

             ((BaseSection)section).setSectionId(sectionId);

             item.setClickHandler(new ClickHandler(){

                         public void onClick(ClickEvent event) {                

                                 //FIXME: This doesn't scroll to exactly the position stuff

                                 DOM.getElementById(sectionId).scrollIntoView();

                         }                    

             });

         if (parentItem != null) {

             parentItem.addSubItem(item);

         } else {

             topLevelMenuItems.add(item);

         }

         menu.refresh();

     }

 }