/**

  * Copyright 2010 The Kuali Foundation Licensed under the

  * Educational Community License, Version 2.0 (the "License"); you may

  * not use this file except in compliance with the License. You may

  * obtain a copy of the License at

  *

  * http://www.osedu.org/licenses/ECL-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an "AS IS"

  * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express

  * or implied. See the License for the specific language governing

  * permissions and limitations under the License.

  */

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

 import java.text.DateFormat;

 import java.util.ArrayList;

 import java.util.Date;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

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

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

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

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

 import org.kuali.student.common.rice.StudentIdentityConstants;

 import org.kuali.student.common.rice.authorization.PermissionType;

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

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

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

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

 import org.kuali.student.common.ui.client.configurable.mvc.layouts.MenuEditableSectionController;

 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.configurable.mvc.views.SectionView;

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

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

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

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

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

 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.mvc.Controller;

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

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

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

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

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

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

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

 import org.kuali.student.common.ui.client.mvc.WorkQueue.WorkItem;

 import org.kuali.student.common.ui.client.mvc.dto.ReferenceModel;

 import org.kuali.student.common.ui.client.mvc.history.HistoryManager;

 import org.kuali.student.common.ui.client.security.AuthorizationCallback;

 import org.kuali.student.common.ui.client.security.RequiresAuthorization;

 import org.kuali.student.common.ui.client.service.BaseDataOrchestrationRpcServiceAsync;

 import org.kuali.student.common.ui.client.service.DataSaveResult;

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

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

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

 import org.kuali.student.common.ui.client.validator.ValidatorClientUtils;

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

 import org.kuali.student.common.ui.client.widgets.KSButtonAbstract.ButtonStyle;

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

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

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

 import org.kuali.student.common.ui.client.widgets.buttongroups.ButtonEnumerations.YesNoCancelEnum;

 import org.kuali.student.common.ui.client.widgets.dialog.ButtonMessageDialog;

 import org.kuali.student.common.ui.client.widgets.field.layout.button.ButtonGroup;

 import org.kuali.student.common.ui.client.widgets.field.layout.button.YesNoCancelGroup;

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

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

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

 import org.kuali.student.common.ui.client.widgets.progress.BlockingTask;

 import org.kuali.student.common.ui.client.widgets.progress.KSBlockingProgressIndicator;

 import org.kuali.student.common.ui.client.widgets.search.KSPicker;

 import org.kuali.student.common.ui.client.widgets.table.summary.SummaryTableSection;

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

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

 import org.kuali.student.common.validation.dto.ValidationResultInfo;

 import org.kuali.student.core.statement.dto.StatementTypeInfo;

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

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

 import org.kuali.student.lum.common.client.helpers.RecentlyViewedHelper;

 import org.kuali.student.lum.common.client.lu.LUUIConstants;

 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.configuration.CourseProposalConfigurer;

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

 import org.kuali.student.lum.lu.ui.course.client.requirements.CourseRequirementsDataModel;

 import org.kuali.student.lum.lu.ui.course.client.requirements.HasRequirements;

 import org.kuali.student.lum.lu.ui.course.client.service.CourseRpcService;

 import org.kuali.student.lum.lu.ui.course.client.service.CourseRpcServiceAsync;

 import org.kuali.student.lum.lu.ui.course.client.service.CreditCourseProposalRpcService;

 import org.kuali.student.lum.lu.ui.course.client.service.CreditCourseProposalRpcServiceAsync;

 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.event.logical.shared.ValueChangeEvent;

 import com.google.gwt.event.logical.shared.ValueChangeHandler;

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

 import com.google.gwt.user.client.rpc.AsyncCallback;

 /**

  * Controller for course proposal screens.  This controller controls all functions of the course proposal process

  * and contains the data model and is responsible for retrieving its data and metadata from the server. In

  * addition, this controller is responsible for course proposal save events and updating its ui accordingly.

  * 

  *

  * @author Kuali Student Team

  *

  */

 public class CourseProposalController extends MenuEditableSectionController implements RequiresAuthorization, WorkflowEnhancedNavController, HasRequirements {

         //RPC Services

         protected CreditCourseProposalRpcServiceAsync cluProposalRpcServiceAsync = GWT.create(CreditCourseProposalRpcService.class);

         protected CourseRpcServiceAsync courseServiceAsync = GWT.create(CourseRpcService.class);

         //Models

         protected final DataModel cluProposalModel = new DataModel("Proposal");

         protected final DataModel comparisonModel = new DataModel("Original Course");

         CourseProposalConfigurer cfg;

         private WorkQueue modelRequestQueue;

     protected WorkflowUtilities workflowUtil;

         private boolean initialized = false;

         protected boolean isNew = false;

         private static final String UPDATED_KEY = "metaInfo/updateTime";

         private static final String VERSION_KEY  = "versionInfo/versionedFromId";

     private static final String MSG_GROUP = "course";

         protected String currentDocType = LUConstants.PROPOSAL_TYPE_COURSE_CREATE;

         protected String proposalPath = "";

         protected String currentTitle;

         private final DateFormat df = DateFormat.getInstance();

         private final BlockingTask initializingTask = new BlockingTask("Loading");

         protected final BlockingTask loadDataTask = new BlockingTask("Retrieving Data");

         private final BlockingTask saving = new BlockingTask("Saving");

         protected CourseRequirementsDataModel reqDataModel;

         protected CourseRequirementsDataModel reqDataModelComp;

     public CourseProposalController(){

         super();

         initializeController();

     }

     @Override

     public void setViewContext(ViewContext viewContext) {

             super.setViewContext(viewContext);

             if(viewContext.getId() != null && !viewContext.getId().isEmpty()){

                     if(viewContext.getIdType() != IdType.COPY_OF_OBJECT_ID && viewContext.getIdType() != IdType.COPY_OF_KS_KEW_OBJECT_ID){

                             viewContext.setPermissionType(PermissionType.OPEN);

                     } else{

                             //they are trying to make a modification

                             viewContext.setPermissionType(PermissionType.INITIATE);

                     }

             }

             else{

                     viewContext.setPermissionType(PermissionType.INITIATE);

             }

     }

     protected void initializeController() {

             cfg = GWT.create(CourseProposalConfigurer.class);

                    proposalPath = cfg.getProposalPath();

                    workflowUtil = new WorkflowUtilities(CourseProposalController.this, proposalPath, "Proposal Actions",

                                    CourseProposalConfigurer.CourseSections.WF_APPROVE_DIALOG,"", cfg.getModelId());//TODO make msg

                    cfg.setState(DtoConstants.STATE_DRAFT);

                    //Add an extra menu item to copy the proposal to a new proposal.

                    workflowUtil.getAdditionalItems().add(new KSMenuItemData(this.getMessage("cluCopyItem"), new ClickHandler(){

                         @Override

                         public void onClick(ClickEvent event) {

                             if(getViewContext() != null && getViewContext().getId() != null && !getViewContext().getId().isEmpty()){

                                     getViewContext().setId((String)cluProposalModel.get(cfg.getProposalPath()+"/id"));

                                     getViewContext().setIdType(IdType.COPY_OF_KS_KEW_OBJECT_ID);

                                     getViewContext().getAttributes().remove(StudentIdentityConstants.DOCUMENT_TYPE_NAME);

                                     cluProposalModel.resetRoot(); // Reset the root so that the model can be reloaded from the copied proposal.

                         }

                 HistoryManager.navigate("/HOME/CURRICULUM_HOME/COURSE_PROPOSAL", getViewContext());

                         }

                 }));

                    super.setDefaultModelId(cfg.getModelId());

                    registerModelsAndHandlers();

         addStyleName("courseProposal");

     }

     protected void registerModelsAndHandlers(){

         reqDataModel = new CourseRequirementsDataModel(this);

         reqDataModelComp = new CourseRequirementsDataModel(this);

         super.registerModel(super.getDefaultModelId(), new ModelProvider<DataModel>() {

             @Override

             public void requestModel(final ModelRequestCallback<DataModel> callback) {

                 if (modelRequestQueue == null){

                     modelRequestQueue = new WorkQueue();

                 }

                 WorkItem workItem = new WorkItem(){

                     @Override

                     public void exec(Callback<Boolean> workCompleteCallback) {

                         if (cluProposalModel.getRoot() == null || initialized == false){

                             populateModel(callback, workCompleteCallback);

                         } else {

                             callback.onModelReady(cluProposalModel);

                             workCompleteCallback.exec(true);

                         }

                     }

                 };

                 modelRequestQueue.submit(workItem);

             }

         });

         super.registerModel("ComparisonModel", new ModelProvider<DataModel>() {

             @Override

             public void requestModel(final ModelRequestCallback<DataModel> callback) {

                     if(comparisonModel.getRoot() != null && comparisonModel.getRoot().size() != 0){

                             callback.onModelReady(comparisonModel);

                     }

                     else{

                             callback.onModelReady(null);

                     }

             }

         });

         super.addApplicationEventHandler(ContentDirtyEvent.TYPE, new ContentDirtyEventHandler(){

                         public void onContentDirty(ContentDirtyEvent event) {

                         setContentWarning("You have unsaved changes");                                

                         }                

         });

         super.addApplicationEventHandler(SaveActionEvent.TYPE, new SaveActionHandler(){

             public void doSave(SaveActionEvent saveAction) {

                 GWT.log("CluProposalController received save action request.", null);

                 doSaveAction(saveAction);

             }

         }); 

             }

     /**

      * Used to populate the proposal model based on the view context.  

      * 

      * @param callback

      * @param workCompleteCallback

      */

     private void populateModel(final ModelRequestCallback<DataModel> callback, Callback<Boolean> workCompleteCallback){

             if(getViewContext().getIdType() == IdType.DOCUMENT_ID){

             getCluProposalFromWorkflowId(callback, workCompleteCallback);

         } else if (getViewContext().getIdType() == IdType.KS_KEW_OBJECT_ID || getViewContext().getIdType() == IdType.OBJECT_ID){

             getCluProposalFromProposalId(getViewContext().getId(), callback, workCompleteCallback);

         } else if (getViewContext().getIdType() == IdType.COPY_OF_OBJECT_ID){

                 if(LUConstants.PROPOSAL_TYPE_COURSE_MODIFY.equals(getViewContext().getAttribute(StudentIdentityConstants.DOCUMENT_TYPE_NAME))||

                                LUConstants.PROPOSAL_TYPE_COURSE_MODIFY_ADMIN.equals(getViewContext().getAttribute(StudentIdentityConstants.DOCUMENT_TYPE_NAME))){

                         createModifyCluProposalModel("versionComment", callback, workCompleteCallback);

                 }else{

                         createCopyCourseModel(getViewContext().getId(), callback, workCompleteCallback);

                 }

         } else if (getViewContext().getIdType() == IdType.COPY_OF_KS_KEW_OBJECT_ID){

                 createCopyCourseProposalModel(getViewContext().getId(), callback, workCompleteCallback);

         } else{

             createNewCluProposalModel(callback, workCompleteCallback);

         }

     }

     protected void getCurrentModel(final ModelRequestCallback<DataModel> callback, Callback<Boolean> workCompleteCallback){

             if (cluProposalModel.getRoot() != null && cluProposalModel.getRoot().size() > 0){

                 String id = cluProposalModel.get(cfg.getProposalPath()+"/id");

                 if(id != null){

                         getCluProposalFromProposalId(id, callback, workCompleteCallback);

                 }

                 else{

                         populateModel(callback, workCompleteCallback);

                 }

             }

             else{

                     populateModel(callback, workCompleteCallback);

             }

     }

     private void intializeView(final Callback<Boolean> onReadyCallback) {

             if (initialized) {

                     onReadyCallback.exec(true);

             } else {

                     initialized = true;

                     KSBlockingProgressIndicator.addTask(initializingTask);

                     setContentWarning("");

             this.requestModel(new ModelRequestCallback<DataModel>(){

                                 @Override

                                 public void onModelReady(DataModel model) {

                                         //Setup View Context & determine id type

                                         String idType = null;

                                     String viewContextId = "";

                                     if(getViewContext().getIdType() != null){

                                 idType = getViewContext().getIdType().toString();

                                 viewContextId = getViewContext().getId();

                                 if(getViewContext().getIdType()==IdAttributes.IdType.COPY_OF_OBJECT_ID){

                                         viewContextId = null;

                                 }

                                     }

                                     //FIXME: Something looks odd in determining currentDocType

                                     if(cluProposalModel.get(VERSION_KEY) != null && !((String)cluProposalModel.get(VERSION_KEY)).equals("") && !LUConstants.PROPOSAL_TYPE_COURSE_MODIFY_ADMIN.equals(currentDocType)){

                                             currentDocType = LUConstants.PROPOSAL_TYPE_COURSE_MODIFY;

                                     }

                                     //Check for admin modify type

                                     if(LUConstants.PROPOSAL_TYPE_COURSE_MODIFY_ADMIN.equals(cluProposalModel.get(cfg.getProposalPath()+"/type"))){

                                             currentDocType = LUConstants.PROPOSAL_TYPE_COURSE_MODIFY_ADMIN;

                                     }

                                     //Get the state for save action

                                     String dtoState = getStateforSaveAction(cluProposalModel); 

                                     //Get the current workflow node for proposal

                                     String workflowNode = cluProposalModel.get(cfg.getProposalPath()+"/workflowNode");

                                     //Add properties to an id attributes map so metadata service can get correct metadata

                                         HashMap<String, String> idAttributes = new HashMap<String, String>();

                                     if(idType != null){

                                             idAttributes.put(IdAttributes.ID_TYPE, idType);

                                     }

                                     idAttributes.put(StudentIdentityConstants.DOCUMENT_TYPE_NAME, currentDocType);                                                                        

                                     idAttributes.put(DtoConstants.DTO_STATE, dtoState);                                    

                                     idAttributes.put(DtoConstants.DTO_NEXT_STATE, cfg.getNextState());

                                     if (LUConstants.PROPOSAL_TYPE_COURSE_MODIFY.equalsIgnoreCase(currentDocType) ||

                                             LUConstants.PROPOSAL_TYPE_COURSE_CREATE.equals(currentDocType)){                                            

                                             idAttributes.put(DtoConstants.DTO_WORKFLOW_NODE, workflowNode);

                                     }

                                     //Get metadata and complete initializing the screen

                                     getCourseProposalRpcService().getMetadata(viewContextId, idAttributes, new KSAsyncCallback<Metadata>(){

                                                 @Override

                         public void handleTimeout(Throwable caught) {

                                         initializeFailed(); 

                                                 }

                                                 @Override

                         public void handleFailure(Throwable caught) {

                                                         initializeFailed();

                                     throw new RuntimeException("Failed to get model definition.", caught);

                                 }

                                                 public void initializeFailed(){

                                                 initialized = false;

                                         onReadyCallback.exec(false);

                                         KSBlockingProgressIndicator.removeTask(initializingTask);                                                        

                                                 }

                                 public void onSuccess(Metadata result) {

                                         DataModelDefinition def = new DataModelDefinition(result);

                                     cluProposalModel.setDefinition(def);

                                     comparisonModel.setDefinition(def);

                                     configureScreens(def, onReadyCallback);

                                 }

                                   });

                                 }

                                 @Override

                                 public void onRequestFail(Throwable cause) {

                                         GWT.log("Failed to get modeld for proposal controller init");

                                         onReadyCallback.exec(false);

                                 }

                         });

             }

     }

     @Override

     public void getMetadataForFinalState(final KSAsyncCallback<Metadata> callback){

                 //Setup View Context

                 String idType = null;

                 String viewContextId = "";

                 if(getViewContext().getIdType() != null){

             idType = getViewContext().getIdType().toString();

             viewContextId = getViewContext().getId();

             if(getViewContext().getIdType()==IdAttributes.IdType.COPY_OF_OBJECT_ID){

                     viewContextId = null;

             }

                 }

                 HashMap<String, String> idAttributes = new HashMap<String, String>();

                 if(idType != null){

                         idAttributes.put(IdAttributes.ID_TYPE, idType);

                 }

                 idAttributes.put(StudentIdentityConstants.DOCUMENT_TYPE_NAME, currentDocType);

                 idAttributes.put(DtoConstants.DTO_STATE, cfg.getState());                                    

                 idAttributes.put(DtoConstants.DTO_NEXT_STATE, cfg.getNextState());

                 idAttributes.put(DtoConstants.DTO_WORKFLOW_NODE, "Publication Review");

                 //Get metadata and complete initializing the screen

                 getCourseProposalRpcService().getMetadata(viewContextId, idAttributes, new KSAsyncCallback<Metadata>(){

                         @Override

                         public void onSuccess(Metadata result) {

                                 callback.onSuccess(result);

                         }

                 });

     }

     protected void configureScreens(final DataModelDefinition modelDefinition, final Callback<Boolean> onReadyCallback){

             if (workflowUtil != null){

                     workflowUtil.requestAndSetupModel(NO_OP_CALLBACK);        

             }

         CourseRequirementsDataModel.getStatementTypes(new Callback<List<StatementTypeInfo>>() {

             @Override

             public void exec(List<StatementTypeInfo> stmtTypes) {

                 List<StatementTypeInfo> stmtTypesOut = new ArrayList<StatementTypeInfo>();

                 if (stmtTypes != null) {

                     for (StatementTypeInfo stmtType : stmtTypes) {

                         if (stmtType.getId().contains("kuali.statement.type.course.enrollmentEligibility") ||

                             stmtType.getId().contains("kuali.statement.type.course.creditConstraints")) {

                             continue;

                         }

                         stmtTypesOut.add(stmtType);

                     }

                 }

                 cfg.setStatementTypes(stmtTypesOut);

                 cfg.setModelDefinition(modelDefinition);

                 cfg.configure(CourseProposalController.this);

                 //Add fields to workflow utils screens

                 if(workflowUtil!=null){

                         requestModel(new ModelRequestCallback<DataModel>(){

                                                 public void onModelReady(DataModel model) {

                                                         //Only display if this is a modification

                                                         String versionedFromId = model.get("versionInfo/versionedFromId");

                                                         if(versionedFromId!=null && !versionedFromId.isEmpty()){        

                                                             KSLabel descLabel = new KSLabel();

                                                             descLabel.setText(Application.getApplicationContext().getUILabel("course", LUUIConstants.FINAL_APPROVAL_DIALOG));

                                                             if (workflowUtil.getApproveDialogue() != null) {

                                                                 workflowUtil.getApproveDialogue().addWidget(descLabel);

                                                             }

                                                             workflowUtil.addApproveDialogField("", "startTerm", cfg.generateMessageInfo(LUUIConstants.PROPOSAL_START_TERM), modelDefinition, true, true);

                                                             workflowUtil.addApproveDialogField("proposal", "prevEndTerm", cfg.generateMessageInfo(LUUIConstants.PROPOSAL_PREV_END_TERM), modelDefinition, false);

                                                             workflowUtil.updateApproveFields();                                                            

                                                             workflowUtil.progressiveEnableFields();                                                            

                                                         }else{

                                                                 //Ignore this field (so blanket approve works if this is a new course proposal and not modifiaction)

                                                                 workflowUtil.addIgnoreDialogField("proposal/prevEndTerm");

                                                         }

                                                 }

                                                 public void onRequestFail(Throwable cause) {

                                                 }

                         });

                 }

                 progressiveEnableFields();

                 onReadyCallback.exec(true);

                 KSBlockingProgressIndicator.removeTask(initializingTask);

             }

         });

     }

     /**

      * This progressively enables/disables screen fields based on other fields present in the screens.

      *  

      * NOTE: This metod must be caled after cfg.configure() is called, otherwise path to field mappings won't exist in ApplicationContext

      */

     protected void progressiveEnableFields(){

                 final FieldDescriptor endTerm = Application.getApplicationContext().getPathToFieldMapping(null,CreditCourseConstants.END_TERM);

                 final FieldDescriptor pilotCourse = Application.getApplicationContext().getPathToFieldMapping(null,CreditCourseConstants.PILOT_COURSE);

                 if (pilotCourse != null && endTerm != null){

                     //Enable and require end term field based on pilot course value in model loaded                

                 Boolean enableEndTerm = Boolean.TRUE.equals(cluProposalModel.get(CreditCourseConstants.PILOT_COURSE)) 

                         || DtoConstants.STATE_RETIRED.equalsIgnoreCase((String)cluProposalModel.get(CreditCourseConstants.STATE));

             BaseSection.progressiveEnableAndRequireFields(enableEndTerm, endTerm);

                 //Add a click handler to pilot checkbox to toggle enabling and requiredness of end term field

                         KSCheckBox pilotCheckbox = ((KSCheckBox)pilotCourse.getFieldWidget());

                 pilotCheckbox.addValueChangeHandler(new ValueChangeHandler<Boolean>() {

                                 @Override

                                 public void onValueChange(ValueChangeEvent<Boolean> event) {

                                         //Disable/enable end term field based on new value of pilot checkbox

                     BaseSection.progressiveEnableAndRequireFields(event.getValue(), endTerm);

                                 //Clear out endTerm value if pilot course unchecked (as this field is not required when not pilot course)

                                 if (!event.getValue()){

                                                 ((KSDropDown)((KSPicker)endTerm.getFieldWidget()).getInputWidget()).clear();                                

                                         }                                                

                                 }

                         });

                 }

     }

     @Override

     @SuppressWarnings("unchecked")

     public void requestModel(Class modelType, final ModelRequestCallback callback) {

         if(modelType == ReferenceModel.class){

                 if (cluProposalModel != null){

                         ReferenceModel ref = new ReferenceModel();

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

                             ref.setReferenceId((String)cluProposalModel.get(cfg.getProposalPath()+"/id"));

                         } else {

                                 ref.setReferenceId(null);

                         }

                         //Use the referenceAttribute to store misc data from the parent model like reference name, etc

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

                                 Map<String, String> attributes = new HashMap<String, String>();

                                 attributes.put("name", (String)cluProposalModel.get(cfg.getProposalPath()+"/name"));

                                 ref.setReferenceAttributes(attributes);

                         } else {

                                 ref.setReferenceAttributes(null);

                         }

                         ref.setReferenceTypeKey(cfg.getProposalReferenceTypeKey());

                         ref.setReferenceType(cfg.getProposalReferenceObjectType());

                         ref.setReferenceState(getViewContext().getState());

                         callback.onModelReady(ref);

                 }

         } else if (modelType == Data.class){

                 requestModel(cfg.getModelId(), callback);

         } else {

             super.requestModel(modelType, callback);

         }

     }

     private void getCluProposalFromWorkflowId(@SuppressWarnings("rawtypes") final ModelRequestCallback callback, final Callback<Boolean> workCompleteCallback){

         KSBlockingProgressIndicator.addTask(loadDataTask);

         workflowUtil.getDataIdFromWorkflowId(getViewContext().getId(), new KSAsyncCallback<String>(){

                         @Override

                         public void handleFailure(Throwable caught) {

                 Window.alert("Error loading Proposal from Workflow Document: "+caught.getMessage());

                 createNewCluProposalModel(callback, workCompleteCallback);

                 KSBlockingProgressIndicator.removeTask(loadDataTask);

                         }

                         @Override

                         public void onSuccess(String proposalId) {

                                 KSBlockingProgressIndicator.removeTask(loadDataTask);

                                 getCluProposalFromProposalId(proposalId, callback, workCompleteCallback);

                         }

         });

     }

     protected void getCluProposalFromProposalId(String id, @SuppressWarnings("rawtypes") final ModelRequestCallback callback, final Callback<Boolean> workCompleteCallback){

             KSBlockingProgressIndicator.addTask(loadDataTask);

             getCourseProposalRpcService().getData(id, new KSAsyncCallback<Data>(){

                         @Override

                         public void handleFailure(Throwable caught) {

                 Window.alert("Error loading Proposal: "+caught.getMessage());

                 createNewCluProposalModel(callback, workCompleteCallback);

                 KSBlockingProgressIndicator.removeTask(loadDataTask);

                         }

                         @Override

                         public void onSuccess(Data result) {

                                 cluProposalModel.setRoot(result);

                         setHeaderTitle();

                         setLastUpdated();

                 reqDataModel.retrieveStatementTypes(cluProposalModel.<String>get("id"), new Callback<Boolean>() {

                     @Override

                     public void exec(Boolean result) {

                        if(result){

                           getCourseComparisonModelAndReqs(callback, workCompleteCallback);

                        }

                     }

                 });

                         }

             });

     }

     @SuppressWarnings("unchecked")

         protected void getCourseComparisonModelAndReqs(final ModelRequestCallback proposalModelRequestCallback, final Callback<Boolean> workCompleteCallback){

                 if(cluProposalModel.get(VERSION_KEY) != null && !((String)cluProposalModel.get(VERSION_KEY)).equals("")){

                         courseServiceAsync.getData((String)cluProposalModel.get(VERSION_KEY), new KSAsyncCallback<Data>(){

                             @Override

                     public void handleFailure(Throwable caught) {

                         Window.alert("Error loading Proposal: "+caught.getMessage());

                         createNewCluProposalModel(proposalModelRequestCallback, workCompleteCallback);

                         KSBlockingProgressIndicator.removeTask(loadDataTask);

                     }

                 @Override

                 public void onSuccess(Data result) {

                         // ??? why result would be null ever?

                     if (result != null) 

                         comparisonModel.setRoot(result);

                     reqDataModel.retrieveStatementTypes(cluProposalModel.<String>get("id"), new Callback<Boolean>() {

                                    @Override

                                    public void exec(Boolean result) {

                                            if (result) {

                                                    KSBlockingProgressIndicator.removeTask(loadDataTask);

                                 reqDataModelComp.retrieveStatementTypes(comparisonModel.<String>get("id"), new Callback<Boolean>() {

                                     @Override

                                     public void exec(Boolean result) {

                                         if (result) {

                                             KSBlockingProgressIndicator.removeTask(loadDataTask);

                                          }

                                     }

                                 });

                                 proposalModelRequestCallback.onModelReady(cluProposalModel);

                                 workCompleteCallback.exec(true);

                                           }

                                    }

                            });

                }

             });

         } else {

             proposalModelRequestCallback.onModelReady(cluProposalModel);

             workCompleteCallback.exec(true);

             KSBlockingProgressIndicator.removeTask(loadDataTask);

         }

     }

     @SuppressWarnings("unchecked")

     protected void createNewCluProposalModel(final ModelRequestCallback callback, final Callback<Boolean> workCompleteCallback){

         Data data = new Data();

             cluProposalModel.setRoot(data);

         Data proposalData = new Data();

         proposalData.set(new Data.StringKey("type"), currentDocType);

         data.set(new Data.StringKey("proposal"), proposalData);                

         if (cfg.getNextState() == null || cfg.getNextState().isEmpty()){

                 proposalData.set(new Data.StringKey("workflowNode"), "PreRoute");

         }

         isNew = true;

         setHeaderTitle();

         setLastUpdated();

         callback.onModelReady(cluProposalModel);

         workCompleteCallback.exec(true);

     }

     private void createModifyCluProposalModel(String versionComment, final ModelRequestCallback callback, final Callback<Boolean> workCompleteCallback){

         Data data = new Data();

         cluProposalModel.setRoot(data);        

         this.currentDocType = getViewContext().getAttribute(StudentIdentityConstants.DOCUMENT_TYPE_NAME);

         Data proposalData = new Data();

         proposalData.set(new Data.StringKey("type"), currentDocType);

         data.set(new Data.StringKey("proposal"), proposalData);

         if (cfg.getNextState() == null && cfg.getNextState().isEmpty()){

                 proposalData.set(new Data.StringKey("workflowNode"), "PreRoute");

         }

         Data versionData = new Data();

         versionData.set(new Data.StringKey("versionIndId"), getViewContext().getId());

         versionData.set(new Data.StringKey("versionComment"), versionComment);

         data.set(new Data.StringKey("versionInfo"), versionData);

         cluProposalRpcServiceAsync.saveData(cluProposalModel.getRoot(), new AsyncCallback<DataSaveResult>() {

                         public void onSuccess(DataSaveResult result) {

                                 cluProposalModel.setRoot(result.getValue());

                                 setHeaderTitle();

                         setLastUpdated();

                         //add to recently viewed now that we know the id of proposal

                         ViewContext docContext = new ViewContext();

                         docContext.setId((String) cluProposalModel.get(cfg.getProposalPath()+"/id"));

                         docContext.setIdType(IdType.KS_KEW_OBJECT_ID);

                         RecentlyViewedHelper.addDocument(getProposalTitle(), 

                                         HistoryManager.appendContext(AppLocations.Locations.COURSE_PROPOSAL.getLocation(), docContext)

                                         + "/SUMMARY");

                         getCourseComparisonModelAndReqs(callback, workCompleteCallback);

                         // We need to update the current view context so that if the user clicks the back button it doesn't 

                         // create a duplicate course proposal. 

                         getViewContext().setIdType(docContext.getIdType());

                         getViewContext().setId(docContext.getId());

                         }

                         public void onFailure(Throwable caught) {

                 Window.alert("Error loading Proposal: "+caught.getMessage());

                 createNewCluProposalModel(callback, workCompleteCallback);

                 KSBlockingProgressIndicator.removeTask(loadDataTask);

                         }

                 });

     }

     @SuppressWarnings("unchecked")

     private void createCopyCourseModel(String originalCluId, final ModelRequestCallback callback, final Callback<Boolean> workCompleteCallback){

             cluProposalRpcServiceAsync.createCopyCourse(originalCluId, new AsyncCallback<DataSaveResult>() {

                         public void onSuccess(DataSaveResult result) {

                                 cluProposalModel.setRoot(result.getValue());

                                 //Add in a blank proposal placeholder

                         Data proposalData = new Data();

                         cluProposalModel.getRoot().set(new Data.StringKey("proposal"), proposalData);

                         if (cfg.getNextState() == null || cfg.getNextState().isEmpty()){

                             proposalData.set(new Data.StringKey("workflowNode"), "PreRoute");

                         }

                         isNew = true;

                                 setHeaderTitle();

                         setLastUpdated();

                         callback.onModelReady(cluProposalModel);

                         workCompleteCallback.exec(true);

                         }

                         public void onFailure(Throwable caught) {

                 Window.alert("Error loading Proposal: "+caught.getMessage());

                 createNewCluProposalModel(callback, workCompleteCallback);

                 KSBlockingProgressIndicator.removeTask(loadDataTask);

                         }

                 });

     }

     @SuppressWarnings("unchecked")

     private void createCopyCourseProposalModel(String originalProposalId, final ModelRequestCallback callback, final Callback<Boolean> workCompleteCallback){

             cluProposalRpcServiceAsync.createCopyCourseProposal(originalProposalId, new AsyncCallback<DataSaveResult>() {

                         public void onSuccess(DataSaveResult result) {

                                 cluProposalModel.setRoot(result.getValue());

                         setHeaderTitle();

                         setLastUpdated();

                         //add to recently viewed now that we know the id of proposal

                         ViewContext docContext = new ViewContext();

                         docContext.setId((String) cluProposalModel.get(cfg.getProposalPath()+"/id"));

                         docContext.setIdType(IdType.KS_KEW_OBJECT_ID);

                         RecentlyViewedHelper.addDocument(getProposalTitle(), 

                                         HistoryManager.appendContext(AppLocations.Locations.COURSE_PROPOSAL.getLocation(), docContext)

                                         + "/COURSE_INFO");

                         // We need to update the current view context so that if the user clicks the back button it doesn't 

                         // create a duplicate course proposal. 

                         getViewContext().setIdType(docContext.getIdType());

                         getViewContext().setId(docContext.getId());

                         callback.onModelReady(cluProposalModel);

                         workCompleteCallback.exec(true);

                         }

                         public void onFailure(Throwable caught) {

                 Window.alert("Error loading Proposal: "+caught.getMessage());

                 createNewCluProposalModel(callback, workCompleteCallback);

                 KSBlockingProgressIndicator.removeTask(loadDataTask);

                         }

                 });

     }

     public void doSaveAction(final SaveActionEvent saveActionEvent){

         requestModel(new ModelRequestCallback<DataModel>() {

             @Override

             public void onModelReady(DataModel model) {

                 CourseProposalController.this.updateModelFromCurrentView();

                 if (isStartViewShowing()){

                         //This call required so fields in start section, which also appear in

                         //other sections don't get overridden from updateModel call above.

                         getStartPopupView().updateModel();

                 }

                     model.validate(new Callback<List<ValidationResultInfo>>() {

                     @Override

                     public void exec(List<ValidationResultInfo> result) {

                             boolean isSectionValid = isValid(result, true);

                             if(isSectionValid){

                             if (startSectionRequired()){

                                 showStartPopup(NO_OP_CALLBACK);

                                 saveActionEvent.doActionComplete();

                             }

                             else{

                                     saveProposalClu(saveActionEvent);

                             }

                             }

                             else{

                                     //saveActionEvent.doActionComplete();

                                     KSNotifier.add(new KSNotification("Unable to save, please check fields for errors.", false, true, 5000));

                             }

                     }

                 });

             }

             @Override

             public void onRequestFail(Throwable cause) {

                     saveActionEvent.doActionComplete();

                 GWT.log("Unable to retrieve model for validation and save", cause);

             }

         });

     }

     public boolean startSectionRequired(){

         String proposalId = cluProposalModel.get(cfg.getProposalPath()+"/id");

         //Defaulting the proposalTitle to courseTitle, this way course data gets set and assembler doesn't

         //complain. This may not be the correct approach.

         String proposalTitle = cluProposalModel.get(cfg.getProposalTitlePath());

         String courseTitle = cluProposalModel.get(cfg.getCourseTitlePath());

         if (proposalTitle == null || proposalTitle.isEmpty()){

             cluProposalModel.set(QueryPath.parse(cfg.getProposalTitlePath()), courseTitle);

         }

             return proposalId==null && !CourseProposalController.this.isStartViewShowing() && !hasTitles(proposalTitle, courseTitle);

     }

     private boolean hasTitles(String proposalTitle, String courseTitle){

             return (proposalTitle != null && !proposalTitle.isEmpty()) && (courseTitle != null && !courseTitle.isEmpty());

     }

     public void saveProposalClu(final SaveActionEvent saveActionEvent){

             KSBlockingProgressIndicator.addTask(saving);

         getCourseProposalRpcService().saveData(cluProposalModel.getRoot(), new KSAsyncCallback<DataSaveResult>(){

             @Override

             public void handleFailure(Throwable caught) {

                 GWT.log("Save Failed.", caught);

                 KSBlockingProgressIndicator.removeTask(saving);

                 KSNotifier.add(new KSNotification("Save Failed on server. Please try again.", false, true, 5000));

             }

             @Override

             public void handleVersionMismatch(Throwable caught) {

                 super.handleVersionMismatch(caught);

                 KSBlockingProgressIndicator.removeTask(saving);

             }

             public void onSuccess(DataSaveResult result) {

                 KSBlockingProgressIndicator.removeTask(saving);

                                 Application.getApplicationContext().clearValidationWarnings();

                                 Application.getApplicationContext().addValidationWarnings(result.getValidationResults());

                                 if(ValidatorClientUtils.hasErrors(result.getValidationResults())){

                         isValid(result.getValidationResults(), false, true);

                     saveActionEvent.setGotoNextView(false);

                     saveActionEvent.doActionComplete();

                     KSNotifier.add(new KSNotification("Save Failed. There were validation errors.", false, true, 5000));

                 }else{

                         saveActionEvent.setSaveSuccessful(true);

                         cluProposalModel.setRoot(result.getValue());

                         String title = getProposalTitle();

                         View currentView = getCurrentView();

                                     if (currentView instanceof SectionView){

                                             ((SectionView)currentView).updateView(cluProposalModel);

                                             ((SectionView) currentView).resetDirtyFlags();

                         }

                     saveActionEvent.doActionComplete();

                                     ViewContext context = CourseProposalController.this.getViewContext();

                                     context.setId((String)cluProposalModel.get(proposalPath+"/id"));

                                     context.setIdType(IdType.KS_KEW_OBJECT_ID);

                                     //Always update the status after a save.

                                     if(workflowUtil != null){

                                             workflowUtil.refresh();

                                     }

                                     setHeaderTitle();

                                     setLastUpdated();

                                     HistoryManager.logHistoryChange();

                                if(isNew){

                                        RecentlyViewedHelper.addCurrentDocument(title);

                                }

                                else if(!currentTitle.equals(title)){

                                        RecentlyViewedHelper.updateTitle(currentTitle, title, (String)cluProposalModel.get(proposalPath+"/id"));

                                }

                                isNew = false;

                                     if(saveActionEvent.gotoNextView()){

                                             CourseProposalController.this.showNextViewOnMenu();

                                     }

                                     if (ValidatorClientUtils.hasWarnings(result.getValidationResults())){

                                             if (!saveActionEvent.gotoNextView()){

                                                     //Need to display warnings when view has not changed.

                                                     isValid(result.getValidationResults(), false, true);

                                             }

                                             KSNotifier.show("Saved with Warnings");

                                     } else {

                                             KSNotifier.show("Save Successful");

                                     }                                  

                        }

             }

         });

     }

     public void setLastUpdated(){

             Date lastUpdated = (Date)cluProposalModel.get(UPDATED_KEY);

             if(lastUpdated != null){

                     setContentInfo("Last Updated: " + df.format(lastUpdated));

             }

             else{

                     setContentInfo("");

             }

     }

     @Override

         public void beforeShow(final Callback<Boolean> onReadyCallback){

             Application.getApplicationContext().clearCrossConstraintMap(null);

             Application.getApplicationContext().clearPathToFieldMapping(null);

             Application.getApplicationContext().clearValidationWarnings();

             Application.getApplicationContext().setParentPath("");

             intializeView(onReadyCallback);

         }

     //Before show is called before the model is bound to the widgets. We need to update cross constraints and re-display 

     // validation warnings after widget binding

     //This gets called twice which is not optimal

         @Override

         public <V extends Enum<?>> void showView(final V viewType,

                         final Callback<Boolean> onReadyCallback) {

                 Callback<Boolean> finalizeView = new Callback<Boolean>(){

                         public void exec(Boolean result) {

                                 //Update cross constraints

                                 for(HasCrossConstraints crossConstraint:Application.getApplicationContext().getCrossConstraints(null)){

                                 crossConstraint.reprocessWithUpdatedConstraints();

                         }

                                 //When showing summary section make sure data gets validated in case there are warnings.

                                 //TODO: Is it possible to cut down on this validation so it doesn't have to validate every time.

                                 if (viewType == CourseSections.SUMMARY){

                                         KSBlockingProgressIndicator.addTask(initializingTask);

                                         courseServiceAsync.validate(cluProposalModel.getRoot(), new KSAsyncCallback<List<ValidationResultInfo>>(){

                                                 @Override

                                                 public void onSuccess(List<ValidationResultInfo> result) {

                                                         Application.getApplicationContext().clearValidationWarnings();

                                                         Application.getApplicationContext().addValidationWarnings(result);

                                                         showWarnings();

                                                         KSBlockingProgressIndicator.removeTask(initializingTask);

                                                 }                                                

                                         });                                        

                                 } else {

                                         showWarnings();                                        

                                 }

                                 onReadyCallback.exec(result);

                         }

         };

                 super.showView(viewType, finalizeView);

         }

    @Override

    public void showDefaultView(Callback<Boolean> onReadyCallback) {

            if(isNew){

                    super.showFirstView(onReadyCallback);

            }

            else{

                    super.showDefaultView(onReadyCallback);

            }

    }

         @Override

     public void setParentController(Controller controller) {

         super.setParentController(controller);

     }

         @Override

         public void checkAuthorization(final PermissionType permissionType, final AuthorizationCallback authCallback) {

                 Map<String,String> attributes = new HashMap<String,String>();

 //                if (StringUtils.isNotBlank(getViewContext().getId())) {

                 GWT.log("Attempting Auth Check.", null);

                 if ( (getViewContext().getId() != null) && (!"".equals(getViewContext().getId())) ) {

                         attributes.put(getViewContext().getIdType().toString(), getViewContext().getId());

                 }

                 cluProposalRpcServiceAsync.isAuthorized(permissionType, attributes, new KSAsyncCallback<Boolean>(){

                         @Override

                         public void handleFailure(Throwable caught) {

                                 authCallback.isNotAuthorized("Error checking authorization.");

                                 GWT.log("Error checking proposal authorization.", caught);

                 Window.alert("Error Checking Proposal Authorization: "+caught.getMessage());

                         }

                         @Override

                         public void onSuccess(Boolean result) {

                                 GWT.log("Succeeded checking auth for permission type '" + permissionType + "' with result: " + result, null);

                                 if (Boolean.TRUE.equals(result)) {

                                         authCallback.isAuthorized();

                                 }

                                 else {

                                         authCallback.isNotAuthorized("User is not authorized: " + permissionType);

                                 }

                         }

             });

         }

         @Override

         public boolean isAuthorizationRequired() {

                 return true;

         }

         @Override

         public void setAuthorizationRequired(boolean required) {

                 throw new UnsupportedOperationException();

         }

     protected void setHeaderTitle(){

             String title;

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

                     title = getProposalTitle();

             }

             else{

                     title = "New Course (Proposal)";

             }

             this.setContentTitle(title);

             this.setName(title);

             WindowTitleUtils.setContextTitle(title);

                 currentTitle = title;

     }

         @Override

         public WorkflowUtilities getWfUtilities() {

                 return workflowUtil;

         }

         @Override

         public void beforeViewChange(final Enum<?> viewChangingTo, final Callback<Boolean> okToChange) {

                 //Make sure the course information data is bound before viewing any other sections for cross field constraints

                 final Callback<Boolean> reallyOkToChange = new Callback<Boolean>(){

                         @Override

                         public void exec(Boolean result) {

                                 if(result){

                                         if(CourseSections.GOVERNANCE.equals(viewChangingTo)){

                                                 getView(CourseSections.COURSE_INFO, new Callback<View>(){

                                                         @Override

                                                         public void exec(final View view) {

                                                                 if(view!=null && view instanceof SectionView){

                                                                         requestModel(new ModelRequestCallback<DataModel>(){

                                                                                 public void onModelReady(DataModel model) {

                                                                                         ((SectionView)view).updateWidgetData(model);

                                                                                         okToChange.exec(true);

                                                                                 }

                                                                                 public void onRequestFail(Throwable cause) {

                                                                                         okToChange.exec(false);

                                                                                 }

                                                                         });

                                                                 }else{

                                                                         okToChange.exec(true);

                                                                 }

                                                         }});

                                         } else

                                                 okToChange.exec(true);                                        

                                 } else         

                                         okToChange.exec(false);

                         }

                 };

                 //We do this check here because theoretically the subcontroller views

                 //will display their own messages to the user to give them a reason why the view

                 //change has been cancelled, otherwise continue to check for reasons not to change

                 //with this controller

                 super.beforeViewChange(viewChangingTo, new Callback<Boolean>(){

                         @Override

                         public void exec(Boolean result) {

                                 if(result){

                                         if(getCurrentView() instanceof SectionView && ((SectionView)getCurrentView()).isDirty()){

                                                 ButtonGroup<YesNoCancelEnum> buttonGroup = new YesNoCancelGroup();

                                                 final ButtonMessageDialog<YesNoCancelEnum> dialog = new ButtonMessageDialog<YesNoCancelEnum>("Warning", "You may have unsaved changes.  Save changes?", buttonGroup);

                                                 buttonGroup.addCallback(new Callback<YesNoCancelEnum>(){

                                                         @Override

                                                         public void exec(YesNoCancelEnum result) {

                                                                 switch(result){

                                                                         case YES:

                                                                                 dialog.hide();

                                                                                 final SaveActionEvent e = new SaveActionEvent();

                                                                                 e.setActionCompleteCallback(new ActionCompleteCallback(){

                                                                                         @Override

                                                                                         public void onActionComplete(ActionEvent action) {

                                                                                                 if(e.isSaveSuccessful()){

                                                                                                         reallyOkToChange.exec(true);

                                                                                                 }

                                                                                                 else{

                                                                                                         reallyOkToChange.exec(false);

                                                                                                 }

                                                                                         }

                                                                                 });