/**

  * 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.common.client.widgets;

 import java.util.ArrayList;

 import java.util.List;

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

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

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

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

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

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

 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.validation.dto.ValidationResultInfo;

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

 import org.kuali.student.core.statement.ui.client.widgets.rules.AccessWidgetValue;

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

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

 import com.google.gwt.user.client.ui.FlowPanel;

 public class BuildCluSetWidget extends FlowPanel implements AccessWidgetValue {

     private CluSetRetriever cluSetRetriever;

     private CluSetEditorWidget cluSetEditorWidgetView;

     private static final String CLUSET_MODEL_ID = "clussetModelId";

     private DataModel ruleFieldsData;

     private BasicLayout reqCompController;

     public enum BuildCourseView {VIEW}

     private BlockingTask retrievingTask = new BlockingTask("Retrieving ...");

     private String cluSetType;

     private String metadataId;

     private String itemLabel;

     private boolean singularCluOnly;

     public BuildCluSetWidget(final CluSetRetriever cluSetRetriever, String cluSetType,

             boolean singularCluOnly) {

         super();

         this.singularCluOnly = singularCluOnly;

         cluSetEditorWidgetView = new CluSetEditorWidget(

                 new CluSetRetrieverImpl(),

                 BuildCourseView.VIEW,

                 "", CLUSET_MODEL_ID, false,

                 null, cluSetType, singularCluOnly);

         ruleFieldsData = new DataModel();

         ruleFieldsData.setRoot(new Data());

         this.cluSetType = cluSetType;

         if (cluSetType != null && cluSetType.equals("kuali.cluSet.type.Program")) {

             this.metadataId = "programSet";

             this.itemLabel = "program";

         } else {

             this.metadataId = "courseSet";

             this.itemLabel = "course";

         }

         //setup controller

         final CluSetRetriever theRetriever = cluSetRetriever;

         this.cluSetRetriever = cluSetRetriever;

         reqCompController = new BasicLayout(null);

         reqCompController.addView(cluSetEditorWidgetView);

         reqCompController.setDefaultModelId(CLUSET_MODEL_ID);

         reqCompController.registerModel(CLUSET_MODEL_ID, new ModelProvider<DataModel>() {

             @Override

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

                 if (ruleFieldsData.getDefinition() == null) {

                     theRetriever.getMetadata(metadataId, new Callback<Metadata>(){

                         @Override

                         public void exec(Metadata result) {

                             DataModelDefinition def = new DataModelDefinition(result);

                             ruleFieldsData.setDefinition(def);

                             callback.onModelReady(ruleFieldsData);

                         }

                     });

                 } else {

                     callback.onModelReady(ruleFieldsData);

                 }

             }

         });

         reqCompController.showView(BuildCourseView.VIEW);

         add(reqCompController);

     }

     @Override

     public void setValue(final String cluSetId) {

         if (cluSetId != null) {

             KSBlockingProgressIndicator.addTask(retrievingTask);

             cluSetRetriever.getData(cluSetId,  new Callback<Data>() {

                 @Override

                 public void exec(Data result) {

                     try {

                         ruleFieldsData.setRoot(result);

                         cluSetEditorWidgetView.updateView(ruleFieldsData);

                         reqCompController.showView(BuildCourseView.VIEW);

                     } finally {

                         KSBlockingProgressIndicator.removeTask(retrievingTask);

                     }

                 }

             });

         }

     }

     @Override

     public void initWidget(List<Metadata> fieldsMetadata) {

     }

     @Override

     public void getValue(final Callback<String> doneSaveCallback) {

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

         reqCompController.getCurrentView().updateModel();

         if(ruleFieldsData!=null){

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

                 @Override

                 public void exec(List<ValidationResultInfo> result) {

                     boolean save = true;

                     View v = reqCompController.getCurrentView();

                     if(v instanceof Section){

                         ((Section) v).setFieldHasHadFocusFlags(true);

                         ErrorLevel status = ((Section) v).processValidationResults(result);

                         if(status == ErrorLevel.ERROR){

                             save = false;

                         }

                     }

                     if(save){

                         reqCompController.getCurrentView().updateModel();

                         reqCompController.updateModel();

                         // set reusable flag here for CluSetManagement.

                         Calendar startCal = new GregorianCalendar();

                         startCal.set(Calendar.YEAR, 1990);

                         startCal.set(Calendar.MONTH, Calendar.JANUARY);

                         startCal.set(Calendar.DATE, 1);

                         startCal.set(Calendar.HOUR_OF_DAY, 1);

                         startCal.set(Calendar.MINUTE, 0);

                         startCal.set(Calendar.SECOND, 0);

                         Calendar endCal = new GregorianCalendar();

                         endCal.set(Calendar.YEAR, 2200);

                         endCal.set(Calendar.MONTH, Calendar.JANUARY);

                         endCal.set(Calendar.DATE, 1);

                         endCal.set(Calendar.HOUR_OF_DAY, 1);

                         endCal.set(Calendar.MINUTE, 0);

                         endCal.set(Calendar.SECOND, 0);

                         CluSetHelper cluSetHelper = CluSetHelper.wrap(ruleFieldsData.getRoot());

                         cluSetHelper.setType(cluSetType);

                         cluSetHelper.setName("AdHock");

                         cluSetHelper.setReusable(new Boolean(false));

                         cluSetHelper.setReferenceable(new Boolean(false));

                         cluSetHelper.setEffectiveDate(startCal.getTime());

                         cluSetHelper.setEffectiveDate(endCal.getTime());

                         int numClus = 0;

                         if (cluSetHelper.getApprovedClus() != null) {

                             List<String> approvedCluIds = new ArrayList<String>();

                             for (Data.Property p : cluSetHelper.getApprovedClus()) {

                                 if(!"_runtimeData".equals(p.getKey())){

                                     String approvedCluId = p.getValue();

                                     approvedCluIds.add(approvedCluId);

                                 }

                             }

                             numClus = numClus + approvedCluIds.size();

                         }

                         if (cluSetHelper.getProposedClus() != null) {

                             List<String> proposedCluIds = new ArrayList<String>();

                             for (Data.Property p : cluSetHelper.getProposedClus()) {

                                 if(!"_runtimeData".equals(p.getKey())){

                                     String proposedCluId = p.getValue();

                                     proposedCluIds.add(proposedCluId);

                                 }

                             }

                             numClus = numClus + proposedCluIds.size();

                         }

                         if (singularCluOnly && numClus > 1) {

                             Window.alert("Only one " + itemLabel + " is allowed.  " +

                                     "Please delete all " + itemLabel + " until there is only one left.");

                         } else {

                             cluSetRetriever.saveData(ruleFieldsData.getRoot(), new Callback<DataSaveResult>() {

                                 @Override

                                 public void exec(DataSaveResult result) {

                                     if (result.getValidationResults() != null &&

                                             !result.getValidationResults().isEmpty()) {

                                         StringBuilder errorMessage = new StringBuilder();

                                         errorMessage.append("Validation error: ");

                                         for (ValidationResultInfo validationError : result.getValidationResults()) {

                                             errorMessage.append(validationError.getMessage()).append(" ");

                                         }

                                         doneSaveCallback.exec(null);

                                         Window.alert(errorMessage.toString());

                                     } else {

                                         ruleFieldsData.setRoot(result.getValue());

                                         CluSetHelper helper = CluSetHelper.wrap((Data)ruleFieldsData.getRoot());

                                         String cluSetId = helper.getId();

                                         Data approvedClusData = helper.getApprovedClus();

                                         Data proposedClusData = helper.getProposedClus();

                                         String cluId = null;

                                         if (singularCluOnly) {

                                             if (cluId == null && approvedClusData != null) {

                                                 for (Data.Property p : approvedClusData) {

                                                     if(!"_runtimeData".equals(p.getKey())){

                                                         cluId = p.getValue();

                                                         break;

                                                     }

                                                 }

                                             }

                                             if (cluId == null && proposedClusData != null) {

                                                 for (Data.Property p : proposedClusData) {

                                                     if(!"_runtimeData".equals(p.getKey())){

                                                         cluId = p.getValue();

                                                         break;

                                                     }

                                                 }

                                             }

                                             doneSaveCallback.exec(cluId);

                                         } else {

                                             doneSaveCallback.exec(cluSetId);

                                         }

                                     }

                                 }

                             });

                         }

                     }

                     else {

                         Window.alert("Save failed.  Please check fields for errors.");

                     }

                 }

             });

         }

     }

 }