package org.kuali.student.lum.lu.ui.tools.client.configuration;

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

 import com.google.gwt.dom.client.Style;

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

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

 import com.google.gwt.i18n.client.DateTimeFormat;

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

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

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

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

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

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

 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.configurable.mvc.FieldDescriptor;

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

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

 import org.kuali.student.common.ui.client.configurable.mvc.binding.ModelWidgetBinding;

 import org.kuali.student.common.ui.client.configurable.mvc.binding.ModelWidgetBindingSupport;

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

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

 import org.kuali.student.common.ui.client.configurable.mvc.views.VerticalSectionView;

 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.history.HistoryManager;

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

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

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

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

 import org.kuali.student.common.ui.client.widgets.headers.KSDocumentHeader;

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

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

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

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

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

 import org.kuali.student.core.assembly.data.LookupMetadata;

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

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

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

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

 import java.util.Date;

 import java.util.List;

 public class ClusetView extends VerticalSectionView {

     private CluSetManagementRpcServiceAsync cluSetManagementRpcServiceAsync = GWT.create(CluSetManagementRpcService.class);

     private CluSetRetriever cluSetRetriever = new CluSetRetrieverImpl();

     private DataModelDefinition modelDefinition;

     private DataModelDefinition searchDefinition;

     private String selectedCluSetId;

     private CluSetsManagementViews viewEnum;

     private SimplePanel cluSetDisplay = new SimplePanel();

     private CluSetEditorWidget cluSetEditor;

     private String cluSetType;

     private KSLabel titleLabel = new KSLabel();

     public void afterModelIsLoaded(DataModel cluSetModel) {

         titleLabel.setText(cluSetModel.<String>get("name"));

     }

     public enum CluSetsManagementViews {

         MAIN,

         CREATE,

         EDIT,

         VIEW

     }

     public ClusetView(CluSetsManagementViews clusetViewEnum, String name, String modelId, final Callback<Boolean> onReady) {

         this(clusetViewEnum, name, modelId, false, onReady);

     }

     public ClusetView(final CluSetsManagementViews clusetViewEnum, String name, String modelId, boolean showTitle, final Callback<Boolean> onReady) {

         super(clusetViewEnum, name, modelId, showTitle);

         cluSetType = "kuali.cluSet.type.CreditCourse";

         if (clusetViewEnum == CluSetsManagementViews.CREATE ||

                 clusetViewEnum == CluSetsManagementViews.EDIT) {

             cluSetEditor = new CluSetEditorWidget(

                     new CluSetRetrieverImpl(),

                     clusetViewEnum, name, modelId, true, null,

                     cluSetType, false);

         }

         viewEnum = clusetViewEnum;

         cluSetManagementRpcServiceAsync.getMetadata("courseSet", null, new KSAsyncCallback<Metadata>() {

             @Override

             public void handleFailure(Throwable caught) {

                 Window.alert("Failed to retrieve cluset definition");

             }

             @Override

             public void onSuccess(Metadata result) {

                 DataModelDefinition def = new DataModelDefinition(result);

                 setModelDefinition(def);

                 cluSetManagementRpcServiceAsync.getMetadata("search", null, new AsyncCallback<Metadata>() {

                     @Override

                     public void onFailure(Throwable caught) {

                         Window.alert("Failed to retrieve searchDefinition");

                     }

                     @Override

                     public void onSuccess(Metadata result) {

                         setSearchDefinition(new DataModelDefinition(result));

                         setupView(clusetViewEnum);

                         if (onReady != null) {

                             onReady.exec(new Boolean(true));

                         }

                     }

                 });

             }

         });

         setStyles();

     }

     private void setStyles() {

         titleLabel.addStyleName("cluSetTitle");

     }

     private void setModelDefinition(DataModelDefinition modelDefinition) {

         this.modelDefinition = modelDefinition;

     }

     private void setSearchDefinition(DataModelDefinition searchDefinition) {

         this.searchDefinition = searchDefinition;

     }

     @Override

     public void beforeShow(Callback<Boolean> onReadyCallback) {

         super.beforeShow(onReadyCallback);

         if (viewEnum == CluSetsManagementViews.VIEW) {

             refreshCluSetDisplay();

         }

     }

     private void refreshCluSetDisplay() {

         if (this.selectedCluSetId != null) {

             CluSetDetailsWidget clusetDetailsWidget =

                     new CluSetDetailsWidget(selectedCluSetId, cluSetRetriever);

             cluSetDisplay.clear();

             cluSetDisplay.setWidget(clusetDetailsWidget);

         }

     }

     private void setupView(CluSetsManagementViews clusetViewEnum) {

         if (clusetViewEnum == CluSetsManagementViews.CREATE ||

                 clusetViewEnum == CluSetsManagementViews.EDIT) {

             setupCreateEditClusetView();

         } else if (clusetViewEnum == CluSetsManagementViews.MAIN) {

             setupMainView();

         } else if (clusetViewEnum == CluSetsManagementViews.VIEW) {

             setupViewClusetView();

         }

     }

     @Override

     public void onHistoryEvent(String historyStack) {

         super.onHistoryEvent(historyStack);

         CluSetsManagementController cluSetsManagementController =

                 (CluSetsManagementController) getController();

         selectedCluSetId = HistoryManager.getTokenMap(historyStack).get("docId");

         cluSetsManagementController.getMainView().setSelectedCluSetId(selectedCluSetId);

         cluSetsManagementController.showView(CluSetsManagementViews.VIEW);

     }

     private void setupViewClusetView() {

         Anchor editCluSet = new Anchor("Edit Course Set");

         editCluSet.addClickHandler(new ClickHandler() {

             @Override

             public void onClick(ClickEvent event) {

                 Controller parentController = getController();

                 parentController.showView(CluSetsManagementViews.EDIT);

             }

         });

         addWidget(titleLabel);

         this.addWidget(editCluSet);

         Section generalClusInfoSection = new VerticalSection();

         KSLabel cluSetTitle = new KSLabel();

         cluSetTitle.getElement().getStyle().setProperty("fontWeight", "bold");

         cluSetTitle.getElement().getStyle().setProperty("fontSize", "16px");

         cluSetTitle.getElement().getStyle().setProperty("borderBotton", "1px solid #D8D8D8");

         addField(generalClusInfoSection,

                 ToolsConstants.CLU_SET_NAME_FIELD,

                 null,

                 cluSetTitle,

                 null);

 //        addField(generalClusInfoSection, 

 //                ToolsConstants.CLU_SET_DESCRIPTION_FIELD, 

 //                generateMessageInfo(ToolsConstants.DESCRIPTION),

 //                new KSLabel(),

 //                null);

 //        addField(generalClusInfoSection, 

 //                ToolsConstants.CLU_SET_EXP_DATE_FIELD, 

 //                generateMessageInfo(ToolsConstants.EXPIRATION_DATE),

 //                new KSLabel(),

 //                null);

         this.addSection(setupGeneralClusInfoSection());

 //        this.addSection(generalClusInfoSection);

         this.addWidget(new KSLabel("Items in this Course Set"));

         this.addWidget(cluSetDisplay);

         this.setStyleName("standard-content-padding");

     }

     private SummaryTableSection setupGeneralClusInfoSection() {

         SummaryTableSection result = new SummaryTableSection(getController());

         result.setEditable(false);

         SummaryTableFieldBlock block = new SummaryTableFieldBlock();

 //        block.addEditingHandler(new EditHandler(CourseSections.COURSE_INFO));

 //        block.setTitle(getLabel(LUConstants.INFORMATION_LABEL_KEY));

         block.addSummaryTableFieldRow(getFieldRow(ToolsConstants.CLU_SET_DESCRIPTION_FIELD, generateMessageInfo(ToolsConstants.DESCRIPTION)));

         SummaryTableFieldRow expDateRow = getFieldRow(ToolsConstants.CLU_SET_EXP_DATE_FIELD,

                 generateMessageInfo(ToolsConstants.EXPIRATION_DATE), null, null, null,

                 new ModelWidgetBindingSupport<HasText>() {

                     public String dateToString(Date date) {

                         String result = null;

                         DateTimeFormat format = DateTimeFormat.getFormat("MM/dd/yyyy");

                         result = format.format(date);

                         return result;

                     }

                     @Override

                     public void setModelValue(HasText widget, DataModel model, String path) {

                         // not implementing here since this value should not be edited through this widget

                     }

                     @Override

                     public void setWidgetValue(HasText widget, DataModel model, String path) {

                         try {

                             QueryPath qPath = QueryPath.parse(path);

                             Object value = null;

                             if (model != null) {

                                 value = model.get(qPath);

                             }

                             if (value != null && widget != null) {

                                 if (value instanceof Date) {

                                     widget.setText(dateToString((Date) value));

                                 } else {

                                     widget.setText(value.toString());

                                 }

                             } else if (value == null && widget != null) {

                                 widget.setText("");

                             }

                         } catch (Exception e) {

                             GWT.log("Error setting widget value for: " + path, e);

                         }

                     }

                 }

                 , false);

         block.addSummaryTableFieldRow(expDateRow);

         result.addSummaryTableFieldBlock(block);

         return result;

     }

     protected SummaryTableFieldRow getFieldRow(String fieldKey, MessageKeyInfo messageKey) {

         return getFieldRow(fieldKey, messageKey, null, null, null, null, false);

     }

     protected SummaryTableFieldRow getFieldRow(String fieldKey, MessageKeyInfo messageKey, boolean optional) {

         return getFieldRow(fieldKey, messageKey, null, null, null, null, optional);

     }

     protected SummaryTableFieldRow getFieldRow(String fieldKey, MessageKeyInfo messageKey, Widget widget, Widget widget2, String parentPath, ModelWidgetBinding<?> binding, boolean optional) {

         QueryPath path = QueryPath.concat(parentPath, fieldKey);

         Metadata meta = modelDefinition.getMetadata(path);

         FieldDescriptorReadOnly fd = new FieldDescriptorReadOnly(path.toString(), messageKey, meta);

         if (widget != null) {

             fd.setFieldWidget(widget);

         }

         if (binding != null) {

             fd.setWidgetBinding(binding);

         }

         fd.setOptional(optional);

         FieldDescriptorReadOnly fd2 = new FieldDescriptorReadOnly(path.toString(), messageKey, meta);

         if (widget2 != null) {

             fd2.setFieldWidget(widget2);

         }

         if (binding != null) {

             fd2.setWidgetBinding(binding);

         }

         fd2.setOptional(optional);

         SummaryTableFieldRow fieldRow = new SummaryTableFieldRow(fd, fd2);

         return fieldRow;

     }

     private void setupMainView() {

         this.addStyleName("blockLayout");

         KSDocumentHeader header = new KSDocumentHeader();

         header.setTitle("Course Set Management");

         this.addWidget(header);

         Anchor createCluSet = new Anchor("<h2 class=\"contentBlock-title\">Create Course Set</h2>", true);

         createCluSet.addClickHandler(new ClickHandler() {

             @Override

             public void onClick(ClickEvent event) {

                 getController().showView(CluSetsManagementViews.CREATE);

             }

         });

         this.addWidget(createCluSet);

         this.addWidget(new KSLabel("Build a new Course set from courses, Course Sets, " +

                 "or specific criteria."));

         Picker cluSetPicker = configureSearch(ToolsConstants.SEARCH_COURSE_SET);

         cluSetPicker.addBasicSelectionCompletedCallback(new Callback<SelectedResults>() {

             @Override

             public void exec(SelectedResults result) {

                 if (result != null && result.getReturnKey() != null && result.getReturnKey().trim().length() > 0) {

                     selectedCluSetId = result.getReturnKey();

                     Controller parentController = getController();

                     parentController.showView(CluSetsManagementViews.VIEW);

                 }

             }

         });

         SectionTitle modifyCluSetTitle = SectionTitle.generateH2Title("View or Modify Course Sets");

         modifyCluSetTitle.addStyleName("contentBlock-title");

         modifyCluSetTitle.getElement().getStyle().setPaddingTop(40, Style.Unit.PX);

         this.addWidget(modifyCluSetTitle);

         this.addWidget(cluSetPicker);

     }

     public String getSelectedCluSetId() {

         return selectedCluSetId;

     }

     public void setSelectedCluSetId(String selectedCluSetId) {

         this.selectedCluSetId = selectedCluSetId;

     }

     private void setupCreateEditClusetView() {

         String contextName = (cluSetType != null && cluSetType.equals("kuali.cluSet.type.Program")) ?

                 "Program" : "Course";

         VerticalSection defineCluSet = initSection(getH3Title(ToolsConstants.DEFINE_CLUSET + contextName), true);

 //        FieldDescriptor typeField = getFieldDescriptor(ToolsConstants.CLU_SET_TYPE_FIELD, null, null, null);

 //        typeField.getFieldWidget().setVisible(false);

 //        ((HasText)typeField.getFieldWidget()).setText("kuali.cluSet.type.CreditCourse");

 //        defineCluSet.addField(typeField);

         addField(defineCluSet, ToolsConstants.CLU_SET_ORGANIZATION_FIELD, generateMessageInfo(ToolsConstants.ORGANIZATION), null, null);

         addField(defineCluSet, ToolsConstants.CLU_SET_NAME_FIELD, generateMessageInfo(ToolsConstants.TITLE + contextName), null, null);

         addField(defineCluSet, ToolsConstants.CLU_SET_DESCRIPTION_FIELD, generateMessageInfo(ToolsConstants.DESCRIPTION), new KSTextArea(), null);

         addField(defineCluSet, ToolsConstants.CLU_SET_EFF_DATE_FIELD, generateMessageInfo(ToolsConstants.EFFECTIVE_DATE), new KSDatePicker(), null);

         addField(defineCluSet, ToolsConstants.CLU_SET_EXP_DATE_FIELD, generateMessageInfo(ToolsConstants.EXPIRATION_DATE), new KSDatePicker(), null);

         KSLabel spacer = new KSLabel();

         spacer.setHeight("20px");

         this.addSection(cluSetEditor);

         this.addWidget(spacer);

         this.addSection(defineCluSet);

         this.setStyleName("standard-content-padding");

     }

     private static VerticalSection initSection(SectionTitle title, boolean withDivider) {

         VerticalSection section = new VerticalSection(title);

         section.addStyleName(LUUIConstants.STYLE_SECTION);

         if (withDivider)

             section.addStyleName(LUUIConstants.STYLE_SECTION_DIVIDER);

         return section;

     }

     private String getLabel(String labelKey) {

         return Application.getApplicationContext().getUILabel("clusetmanagement", "clusetmanagement", "draft", labelKey);

     }

     private SectionTitle getH3Title(String labelKey) {

         return SectionTitle.generateH3Title(getLabel(labelKey));

     }

     protected MessageKeyInfo generateMessageInfo(String labelKey) {

         return new MessageKeyInfo("clusetmanagement", "clusetmanagement", "draft", labelKey);

     }

     private FieldDescriptor getFieldDescriptor(

             String fieldKey,

             MessageKeyInfo messageKey,

             Widget widget,

             String parentPath) {

         QueryPath path = QueryPath.concat(parentPath, fieldKey);

         Metadata meta = modelDefinition.getMetadata(path);

         FieldDescriptor fd;

         if (widget != null) {

             fd = new FieldDescriptor(path.toString(), messageKey, meta, widget);

         } else {

             fd = new FieldDescriptor(path.toString(), messageKey, meta);

         }

         return fd;

     }

     private FieldDescriptor addField(Section section,

                                      String fieldKey,

                                      MessageKeyInfo messageKey,

                                      Widget widget,

                                      String parentPath) {

         FieldDescriptor fd = getFieldDescriptor(fieldKey, messageKey, widget, parentPath);

         section.addField(fd);

         return fd;

     }

     private Picker configureSearch(String fieldKey) {

         QueryPath path = QueryPath.concat(null, fieldKey);

         Metadata metaData = searchDefinition.getMetadata(path);

         Picker picker = new Picker(metaData.getInitialLookup(), metaData.getAdditionalLookups());

         return picker;

     }

     public static class Picker extends KSPicker {

         private String name;

         private LookupMetadata initLookupMetadata;

         private List<LookupMetadata> additionalLookupMetadata;

         public Picker(LookupMetadata inLookupMetadata, List<LookupMetadata> additionalLookupMetadata) {

             super(inLookupMetadata, additionalLookupMetadata);

             this.initLookupMetadata = inLookupMetadata;

             this.additionalLookupMetadata = additionalLookupMetadata;

         }

         public String getName() {

             return name;

         }

         public void setName(String name) {

             this.name = name;

         }

         public LookupMetadata getInitLookupMetadata() {

             return initLookupMetadata;

         }

         public void setInitLookupMetadata(LookupMetadata initLookupMetadata) {

             this.initLookupMetadata = initLookupMetadata;

         }

         public List<LookupMetadata> getAdditionalLookupMetadata() {

             return additionalLookupMetadata;

         }

         public void setAdditionalLookupMetadata(List<LookupMetadata> additionalLookupMetadata) {

             this.additionalLookupMetadata = additionalLookupMetadata;

         }

     }

     @Override

     public void setController(Controller controller) {

         super.setController(controller);

         if (cluSetEditor != null) {

             cluSetEditor.setController(controller);

         }

     }

 }