/**

  * 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.common.ui.client.widgets.search;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Map;

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

 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.WidgetConfigInfo;

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

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

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

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

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

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

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

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

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

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

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

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

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

 import org.kuali.student.common.ui.client.widgets.list.KSCheckBoxList;

 import org.kuali.student.common.ui.client.widgets.list.KSLabelList;

 import org.kuali.student.common.ui.client.widgets.list.KSRadioButtonList;

 import org.kuali.student.common.ui.client.widgets.list.KSSelectItemWidgetAbstract;

 import org.kuali.student.common.ui.client.widgets.list.ListItems;

 import org.kuali.student.common.ui.client.widgets.list.SearchResultListItems;

 import org.kuali.student.common.ui.client.widgets.list.SelectionChangeEvent;

 import org.kuali.student.common.ui.client.widgets.list.SelectionChangeHandler;

 import org.kuali.student.common.ui.client.widgets.suggestbox.KSSuggestBox;

 import org.kuali.student.common.ui.client.widgets.suggestbox.SearchSuggestOracle;

 import org.kuali.student.common.ui.client.widgets.suggestbox.IdableSuggestOracle.IdableSuggestion;

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

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

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

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

 import org.kuali.student.core.assembly.data.Data.DataValue;

 import org.kuali.student.core.assembly.data.Data.StringValue;

 import org.kuali.student.core.assembly.data.Data.Value;

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

 import org.kuali.student.core.search.dto.SearchParam;

 import org.kuali.student.core.search.dto.SearchRequest;

 import org.kuali.student.core.search.dto.SearchResult;

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

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

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

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

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

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

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

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

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

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

 import com.google.gwt.event.shared.HandlerRegistration;

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

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

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

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

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

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

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

 public class KSPicker extends Composite implements HasFocusLostCallbacks, HasValueChangeHandlers<String>, HasDataValue, TranslatableValueWidget, HasInputWidget {

     private FlowPanel layout = new FlowPanel();

     private BasicWidget basicWidget;

     private Anchor advSearchLink = new Anchor(getMessage("advSearch"));

     private AdvancedSearchWindow advSearchWindow = null;

     private SearchPanel searchPanel;

     public SearchPanel getSearchPanel() {

                 return searchPanel;

         }

         private WidgetConfigInfo config;

     private Callback<List<SelectedResults>> advancedSearchCallback;

         private List<Callback<SelectedResults>> basicSelectionCallbacks =

         new ArrayList<Callback<SelectedResults>>();

     private List<Callback<String>> basicSelectionTextChangeCallbacks =

         new ArrayList<Callback<String>>();

     private CachingSearchService cachingSearchService = CachingSearchService.getSearchService();

     public KSPicker(WidgetConfigInfo config) {

         this.config = config;

                 init(config.lookupMeta, config.additionalLookups);

         }

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

             init(inLookupMetadata, additionalLookupMetadata);

     }

     @Override

     public Widget getInputWidget(){

             if(basicWidget != null){

                     return basicWidget.get();

             }

             return null;

     }

     private void init(LookupMetadata inLookupMetadata, List<LookupMetadata> additionalLookupMetadata) {

             this.initWidget(layout);

         if (inLookupMetadata == null) {

             KSErrorDialog.show(new Throwable(getMessage("invalidLookupConfig")));

             return;

         }

         if(config == null) {

             config = new WidgetConfigInfo();

         }

         setupBasicSearch(inLookupMetadata);

         setupAdvancedSearch(additionalLookupMetadata);

     }

     private static String getMessage(final String messageId) {

         return Application.getApplicationContext().getMessage(messageId);

     }

     private void setupBasicSearch(LookupMetadata inLookupMetadata) {

             //setup initial search widget such as suggest box, drop down etc.

             if (inLookupMetadata.getWidget() != null){

                     switch (inLookupMetadata.getWidget()){

                             case SUGGEST_BOX:

                                     setupSuggestBox(inLookupMetadata);

                                     break;

                             case DROP_DOWN:

                             case CHECKBOX_LIST:

                                     setupListWidget(inLookupMetadata);

                                     break;

                             case RADIO:

                                     setupListWidget(inLookupMetadata);

                                     break;

                             case NO_WIDGET:

                         if ((inLookupMetadata.getName() != null) && (inLookupMetadata.getName().trim().length() > 0)) {

                             advSearchLink.setText(inLookupMetadata.getName().trim());

                         }

                         basicWidget = new BasicWidget(new SelectionContainerWidget());

                         break;

                             default:

                                     setupDefaultWidget(inLookupMetadata);

                     }

             } else {

                         setupDefaultWidget(inLookupMetadata);

             }

     }

     private void setupDefaultWidget(LookupMetadata inLookupMetadata){

         basicWidget = new BasicWidget(config != null && config.canEdit ? new KSTextBox() : new KSLabel());

         GWT.log("KSTextBox for " + inLookupMetadata.getSearchTypeId(), null);

         layout.add(basicWidget.get());

     }

     private void setupSuggestBox(LookupMetadata inLookupMetadata){

         if(config.canEdit) {

                 final SearchSuggestOracle orgSearchOracle = new SearchSuggestOracle(inLookupMetadata);

                 final KSSuggestBox suggestBox = new KSSuggestBox(orgSearchOracle, true);

                 suggestBox.addKeyUpHandler(new KeyUpHandler() {

                     @Override

                     public void onKeyUp(KeyUpEvent event) {

                         for(Callback<String> basicSelectionTextChangeCallback: basicSelectionTextChangeCallbacks){

                             basicSelectionTextChangeCallback.exec("Text Changed");

                         }

                     }

                 });

                 suggestBox.addSelectionChangeHandler(new SelectionChangeHandler(){

                     @Override

                     public void onSelectionChange(SelectionChangeEvent event) {

                         IdableSuggestion currentSuggestion = suggestBox.getSelectedSuggestion();

                         SelectedResults selectedResults = new SelectedResults(

                                 currentSuggestion.getReplacementString(), currentSuggestion.getId());

                         for(Callback<SelectedResults> basicSelectionCallback: basicSelectionCallbacks){

                             basicSelectionCallback.exec(selectedResults);

                         }

                     }

                 });

                 basicWidget = new BasicWidget(suggestBox);

                 ((KSSuggestBox) basicWidget.get()).setAutoSelectEnabled(false);

                 orgSearchOracle.setTextWidget(((SuggestBox) basicWidget.get()).getTextBox());

         } else {

             basicWidget = new BasicWidget(new KSLabel());

         }

         layout.add(basicWidget.get());

     }

     private void setupListWidget(LookupMetadata inLookupMetadata){

         //FIXME should we search on values to populate drop down here or later when user will access the screen?

         if(config.canEdit) {

             KSSelectItemWidgetAbstract listItemWidget = null;

             switch (inLookupMetadata.getWidget()){

                     case DROP_DOWN:

                             listItemWidget = new KSDropDown();

                             break;

                     case CHECKBOX_LIST:

                             listItemWidget = new KSCheckBoxList();

                             ((KSCheckBoxList)listItemWidget).setIgnoreMultipleAttributes(true);

                             break;

                     case RADIO:

                             listItemWidget = new KSRadioButtonList();

                             break;

             }

             basicWidget = new BasicWidget(listItemWidget);

             populateListWidget(inLookupMetadata);

         } else {

                 if (inLookupMetadata.getWidget() == LookupMetadata.Widget.DROP_DOWN || inLookupMetadata.getWidget() == LookupMetadata.Widget.RADIO){

                 basicWidget = new BasicWidget(new KSLabel());

                 } else {

                         //FIXME: This method of creating read is very inefficient, need better solution

                         basicWidget = new BasicWidget(new KSLabelList());

                 populateListWidget(inLookupMetadata);

                 }

             layout.add(basicWidget.get());

         }

     }

     private void setupAdvancedSearch(List<LookupMetadata> additionalLookupMetadata) {

         //setup advanced search widget such as advanced search box, browse hierarchy search box etc.

         List<LookupMetadata> advancedLightboxLookupdata = getLookupMetadataBasedOnWidget(additionalLookupMetadata, LookupMetadata.Widget.ADVANCED_LIGHTBOX);

         if ((advancedLightboxLookupdata != null) && config.canEdit) {

             //for multiple searches, show a drop down for user to select from

             if (advancedLightboxLookupdata.size() == 1) {

                 String actionLabel = advancedLightboxLookupdata.get(0).getWidgetOptionValue(LookupMetadata.WidgetOption.ADVANCED_LIGHTBOX_ACTION_LABEL);

                 searchPanel = new SearchPanel(advancedLightboxLookupdata.get(0));

                 searchPanel.setActionLabel(actionLabel);

                 advSearchWindow = new AdvancedSearchWindow("Advanced Search: " + advancedLightboxLookupdata.get(0).getTitle(), searchPanel);

             } else {

                 searchPanel = new SearchPanel(advancedLightboxLookupdata);

                 advSearchWindow = new AdvancedSearchWindow("Advanced Search: " + advancedLightboxLookupdata.get(0).getTitle(), searchPanel);

                 searchPanel.addLookupChangedCallback(new Callback<LookupMetadata>() {

                     @Override

                     public void exec(LookupMetadata selectedLookup) {

                         String actionLabel = (selectedLookup == null)? null : selectedLookup

                                 .getWidgetOptionValue(LookupMetadata.WidgetOption.ADVANCED_LIGHTBOX_ACTION_LABEL);

                         searchPanel.setActionLabel(actionLabel);

                     }

                 });

                 LookupMetadata initialLookupMetaData = advancedLightboxLookupdata.get(0);

                 String actionLabel = (initialLookupMetaData == null)? null : initialLookupMetaData

                         .getWidgetOptionValue(LookupMetadata.WidgetOption.ADVANCED_LIGHTBOX_ACTION_LABEL);

                 searchPanel.setActionLabel(actionLabel);

             }

             searchPanel.setMultiSelect(true);

             /*

             advSearchWindow.addActionCompleteCallback(new Callback<Boolean>() {

                 @Override

                 public void exec(Boolean result) {

                     searchPanel.getActionCompleteCallback().exec(true);

                 }

             }); */

             String previewMode = additionalLookupMetadata.get(0).getWidgetOptionValue(LookupMetadata.WidgetOption.ADVANCED_LIGHTBOX_PREVIEW_MODE);

             if (previewMode != null && previewMode.equals("true")) {

                 searchPanel.setActionLabel("Preview");

             }

             searchPanel.addSelectionCompleteCallback(new Callback<List<SelectedResults>>() {

                 public void exec(List<SelectedResults> results) {

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

                             if (advancedSearchCallback != null) {

                                 advancedSearchCallback.exec(results);

                             }

                             else {

                                 basicWidget.setResults(results);

                             }

                         advSearchWindow.hide();

                         }

                 }

             });

             advSearchLink.addClickHandler(new ClickHandler(){

                 @Override

                 public void onClick(ClickEvent event) {

                    if(advSearchWindow != null){

                        advSearchWindow.show();

                    }

                 }

             });

             layout.add(advSearchLink);

         }

     }

     private void populateListWidget(LookupMetadata inLookupMetadata){

         SearchRequest sr = initializeSearchRequest(inLookupMetadata);

         cachingSearchService.search(sr, new KSAsyncCallback<SearchResult>(){

             @Override

             public void onSuccess(SearchResult results) {

                 if(results != null){

                     ((KSSelectItemWidgetAbstract)basicWidget.get()).setListItems(new SearchResultListItems(results.getRows(), config.lookupMeta));

                 } else {

                     ((KSSelectItemWidgetAbstract)basicWidget.get()).setListItems(new SearchResultListItems(null, config.lookupMeta));

                     //FIXME is this configuration error?

                 }

                 //((KSDropDown)basicWidget.get()).processOutstandingCallback();  //due to possible race condition

                 ((KSSelectItemWidgetAbstract)basicWidget.get()).setInitialized(true);

                 layout.add(basicWidget.get());

             }

         });

     }

         private List<LookupMetadata> getLookupMetadataBasedOnWidget(List<LookupMetadata> additionalLookupMetadata, LookupMetadata.Widget widgetType) {

             //lookup does not need to have additional lookup e.g. if the lookup is for suggest box within advanced search lightbox

             if (additionalLookupMetadata == null) {

                 return null;

             }

             List<LookupMetadata> lookups = new ArrayList<LookupMetadata>();

             for (LookupMetadata addLookupData : additionalLookupMetadata) {

                     if (addLookupData.getWidget() == widgetType) {

                             lookups.add(addLookupData);

                     }

             }

             return (lookups.size() > 0 ? lookups : null);

     }

     public class BasicWidget implements HasDataValue, HasFocusLostCallbacks, TranslatableValueWidget {

                 private Widget basicWidget;

                 public BasicWidget(Widget basicWidget){

                         this.basicWidget = basicWidget;

             initAccessibility();

                 }

         private void initAccessibility() {

             Element element = basicWidget.getElement();

             element.setAttribute("role", "combobox");

             element.setAttribute("aria-autocomplete", "list");

             element.setAttribute("aria-haspopup", "true");

         }

         public void setResults(List<SelectedResults> results) {

                         if (basicWidget instanceof KSTextBox) {

                                 ((KSTextBox)basicWidget).setText(results.get(0).getDisplayKey());  //FIXME: what about the result id?

                         } else if (basicWidget.getClass().getName().contains("ContainerWidget")) {

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

                                 for (SelectedResults result: results) {

                                         //selections.add(result.getDisplayKey());                                                  //FIXME: what about the result ids?

                                         selections.add(result.getReturnKey());                            //we don't need display key, at least for now

                                 }

                                 ((SelectionContainerWidget) basicWidget).setSelections(selections);

                         } else if (basicWidget instanceof KSSuggestBox) {

                 IdableSuggestion theSuggestion = new IdableSuggestion();

                 theSuggestion.setReplacementString(results.get(0).getDisplayKey());

                 theSuggestion.setId(results.get(0).getReturnKey());

                                 ((KSSuggestBox) basicWidget).setValue(theSuggestion);

                         }

                 }

                 public void clear() {

                     if(basicWidget instanceof KSTextBox) {

                 ((KSTextBox)basicWidget).setText(null);

             } else if(basicWidget instanceof KSSuggestBox) {

                 ((KSSuggestBox) basicWidget).setValue((String)null);

             } else if(basicWidget instanceof KSLabel) {

                 ((KSLabel)basicWidget).setText(null);

             } else if(basicWidget instanceof KSDropDown) {

                 ((KSDropDown)basicWidget).clear();

             } else {

                 ((KSSuggestBox) basicWidget).setValue(null, false);

             }

                 }

                 public void setValue(final String id, String translation) {

                         if(basicWidget instanceof KSTextBox) {

                                 ((KSTextBox)basicWidget).setText(translation);

                         } else if(basicWidget instanceof KSSuggestBox) {

                                 ((KSSuggestBox) basicWidget).setValue(id, translation);

                         } else if(basicWidget instanceof KSLabel) {

                             ((KSLabel)basicWidget).setText(translation);

                         } else if(basicWidget instanceof KSSelectItemWidgetAbstract) {

                             ListItems searchResults = ((KSSelectItemWidgetAbstract)basicWidget).getListItems();

                             if (searchResults != null) {

                                 ((KSSelectItemWidgetAbstract)basicWidget).selectItem(id);

                             }

                             else {

                     ((KSSelectItemWidgetAbstract)basicWidget).addWidgetReadyCallback(new Callback<Widget>() {

                         @Override

                         public void exec(Widget widget) {

                             final ListItems searchResults = ((KSSelectItemWidgetAbstract)widget).getListItems();

                             if(id != null){

                                 for (String itemId : searchResults.getItemIds()) {

                                     if (itemId.equals(id.trim())) {

                                         ((KSSelectItemWidgetAbstract)basicWidget).selectItem(itemId);

                                         break;

                                     }

                                 }

                             } else {

                                 ((KSSelectItemWidgetAbstract)basicWidget).clear();

                             }

                         }

                     });

                 }

             } else {

                                 ((KSSuggestBox) basicWidget).setValue("", true);

                         }

                 }

                 public void setValue(final Value value, boolean fireEvents) {

                         if (basicWidget instanceof KSTextBox || basicWidget instanceof KSLabel) {

                                 if(value != null){

                                         ((HasText)basicWidget).setText((String) value.get());

                                 }

                                 else{

                                         ((HasText)basicWidget).setText("");

                                 }

                         } else if (basicWidget instanceof KSSuggestBox) {

                                 //Do check here

                                 if(value != null){

                                         if(!config.isRepeating){

                                                 ((KSSuggestBox) basicWidget).setValue((String)value.get(), fireEvents);

                                         }

                                         else{

                                                 DataValue dataValue = (DataValue)value;

                                                 Data d = dataValue.get();

                                                 QueryPath path = QueryPath.parse("0");

                                                 String v = d.query(path);

                                                 ((KSSuggestBox) basicWidget).setValue((String)v, fireEvents);

                                         }

                                 }

                                 else{

                                         ((KSSuggestBox) basicWidget).setValue("", fireEvents);

                                 }

                         } else if(basicWidget instanceof KSSelectItemWidgetAbstract) {

                                 SelectItemWidgetBinding.INSTANCE.setWidgetValue((KSSelectItemWidgetAbstract)basicWidget, value);

             }

                 }

                 public String getDisplayValue() {

                     String result = "";

                     if (basicWidget instanceof KSTextBox) {

                 result = ((KSTextBox)basicWidget).getText();

             } else if (basicWidget instanceof KSSuggestBox) {

                 IdableSuggestion suggestion = ((KSSuggestBox)basicWidget).getCurrentSuggestion();

                 if(suggestion != null) {

                     result = suggestion.getReplacementString();

                 }

             }  else if (basicWidget instanceof KSDropDown) {

                 KSDropDown dropDown = (KSDropDown)basicWidget;

                 StringValue value = new StringValue(((KSDropDown) basicWidget).getSelectedItem());

                 String itemId = dropDown.getSelectedItem();

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

                     result = dropDown.getListItems().getItemText(itemId);

                 }

             }

                     return result;

                 }

                 public Value getValue() {

                         if (basicWidget instanceof KSTextBox) {

                                 StringValue value = new StringValue(((KSTextBox)basicWidget).getText());

                                 return value;

                         } else if (basicWidget instanceof KSSuggestBox) {

                                 //Do check here

                                 if(!config.isRepeating){

                                         StringValue value = new StringValue(((KSSuggestBox) basicWidget).getValue());

                                         return value;

                                 }

                                 else{

                                         Data data = new Data();

                                         data.set(new Data.IntegerKey(0),((KSSuggestBox) basicWidget).getValue());

                                         DataValue value = new DataValue(data);

                                         return value;

                                 }

                         }  else if (basicWidget instanceof KSSelectItemWidgetAbstract) {

                                 return SelectItemWidgetBinding.INSTANCE.getWidgetValue((KSSelectItemWidgetAbstract)basicWidget);

                         }

                         return null;

                 }

                 public HandlerRegistration addValueChangeHandler(ValueChangeHandler<String> handler) {

                         if (basicWidget instanceof KSTextBox) {

                                 return ((KSTextBox)basicWidget).addValueChangeHandler(handler);

                         } else if (basicWidget instanceof KSSuggestBox) {

                                 return ((KSSuggestBox) basicWidget).addValueChangeHandler(handler);

                         }

                         return null;

                 }

         public void addValuesChangeHandler(ValueChangeHandler<List<String>> handler) {

             if (basicWidget.getClass().getName().contains("ContainerWidget")) {

                 ((SelectionContainerWidget) basicWidget).addValueChangeHandler(handler);

             }

         }

                 public void addSelectionChangeHandler(SelectionChangeHandler handler) {

                     if (basicWidget instanceof KSSelectItemWidgetAbstract)  {

                                 ((KSSelectItemWidgetAbstract) basicWidget).addSelectionChangeHandler(handler);

                         }

                 }

                 @Override

                 public void addValueChangeCallback(final Callback<Value> callback) {

                         ValueChangeHandler<String> handler = new ValueChangeHandler<String>(){

                                 @Override

                                 public void onValueChange(ValueChangeEvent<String> event) {

                                         StringValue value = new StringValue(event.getValue());

                                         callback.exec(value);

                                 }

                         };

                         addValueChangeHandler(handler);

                 }

                 @Override

                 public void addFocusLostCallback(final Callback<Boolean> callback) {

                         if (basicWidget instanceof KSTextBox) {

                                 ((KSTextBox)basicWidget).addBlurHandler(new BlurHandler(){

                                         @Override

                                         public void onBlur(BlurEvent event) {

                                                 callback.exec(true);

                                         }

                                 });

                         } else if (basicWidget instanceof KSSuggestBox) {

                                 ((KSSuggestBox) basicWidget).getTextBox().addBlurHandler(new BlurHandler(){

                     @Override

                     public void onBlur(BlurEvent event) {

                             //Don't blur the widget if the suggestion list is showing

                             if(!((KSSuggestBox) basicWidget).isSuggestionListShowing()){

                             callback.exec(true);

                             }

                     }

                                 });

                         } else if (basicWidget instanceof KSSelectItemWidgetAbstract) {

                 ((KSSelectItemWidgetAbstract) basicWidget).addBlurHandler(new BlurHandler(){

                     @Override

                     public void onBlur(BlurEvent event) {

                         callback.exec(true);

                     }

                 });

             }

                 }

         @Override

         public void setValue(Value value) {

             this.setValue(value, true);

         }

         public Widget get() {

             return basicWidget;

         }

         @Override

         public void setValue(final Map<String, String> translations) {

                 //TODO: Reviewed in M6 cleanup, unknown:  Update to also work with a KSLabelList that doesn't require pre-population of all list items

                 if (basicWidget instanceof KSSelectItemWidgetAbstract){

                         Callback<Widget> widgetReadyCallback = new Callback<Widget>(){

                                         public void exec(Widget widget) {

                                                 ((KSSelectItemWidgetAbstract)widget).clear();

                                         for (String id:translations.keySet()){

                                                 ((KSSelectItemWidgetAbstract)widget).selectItem(id);

                                         }

                                         }

                         };

                         if (!((KSSelectItemWidgetAbstract)basicWidget).isInitialized()){

                                 ((KSSelectItemWidgetAbstract)basicWidget).addWidgetReadyCallback(widgetReadyCallback);

                         } else{

                                 widgetReadyCallback.exec(basicWidget);

                         }

                 } else {

                         GWT.log("Basic picker widget not coded to handle multiple translations", null);

                 }

         }

     }

     private class SelectionContainerWidget extends Widget implements HasValueChangeHandlers<List<String>> {

             private List<String> selections = new ArrayList<String>();

             public SelectionContainerWidget(){

                     this.setElement(DOM.createSpan());

             }

                 public List<String> getSelections() {

                         return selections;

                 }

                 public void setSelections(List<String> selections) {

                         this.selections = selections;

                         ValueChangeEvent.fire(this, this.selections);

                 }

                 @Override

                 public HandlerRegistration addValueChangeHandler(ValueChangeHandler<List<String>> handler) {

                         return super.addHandler(handler, ValueChangeEvent.getType());

                 }

     }

     private SearchRequest initializeSearchRequest(LookupMetadata lookup) {

         SearchRequest sr = new SearchRequest();

         List<SearchParam> params = new ArrayList<SearchParam>();

         sr.setSearchKey(lookup.getSearchTypeId());

         if (lookup.getResultSortKey() != null){

                 sr.setSortColumn(lookup.getResultSortKey());

         }

         //initialize search parameters that are hidden from the UI because they are set to default context specific values

         for(LookupParamMetadata metaParam: lookup.getParams()){

             if(metaParam.getWriteAccess() == WriteAccess.NEVER){

                 if ((metaParam.getDefaultValueString() == null || metaParam.getDefaultValueString().isEmpty())&&

                     (metaParam.getDefaultValueList() == null || metaParam.getDefaultValueList().isEmpty())) {

                     //FIXME throw an exception?

                     GWT.log("Key = " + metaParam.getKey() + " has write access NEVER but has no default value!", null);

                     continue;

                 }

                 SearchParam param = new SearchParam();

                 param.setKey(metaParam.getKey());

                 if(metaParam.getDefaultValueList()==null){

                     param.setValue(metaParam.getDefaultValueString());

                 }else{

                     param.setValue(metaParam.getDefaultValueList());

                 }

                 params.add(param);

             }

             else if(metaParam.getWriteAccess() == WriteAccess.WHEN_NULL){

                 if((metaParam.getDefaultValueString() != null && !metaParam.getDefaultValueString().isEmpty())||

                    (metaParam.getDefaultValueList() != null && !metaParam.getDefaultValueList().isEmpty())){

                     SearchParam param = new SearchParam();

                     param.setKey(metaParam.getKey());

                     if(metaParam.getDefaultValueList()==null){

                         param.setValue(metaParam.getDefaultValueString());

                     }else{

                         param.setValue(metaParam.getDefaultValueList());

                     }

                     params.add(param);

                 }

             }

         }

         sr.setParams(params);

         return sr;

     }

     public AdvancedSearchWindow getSearchWindow(){

         return advSearchWindow;

     }

     public void addBasicSelectionCompletedCallback(Callback<SelectedResults> callback) {

         basicSelectionCallbacks.add(callback);

     }

     public void addBasicSelectionTextChangeCallback(Callback<String> callback) {

         basicSelectionTextChangeCallbacks.add(callback);

     }

         @Override

         public void addValueChangeCallback(Callback<Value> callback) {

                 basicWidget.addValueChangeCallback(callback);

         }

         @Override

         public void setValue(Value value) {

                 setValue(value, true);

         }

     public void setValue(String value){

         basicWidget.setValue(new StringValue(value));

     }

         public void setValue(Value value, boolean fireEvents) {

                 //suggest.reset();

                 basicWidget.setValue(value, fireEvents);

         }

         public void clear() {

             basicWidget.clear();

         }

     @Override

     public void setValue(String id, String translation) {

         basicWidget.setValue(id, translation);

     }

     @Override

     public Value getValue() {

         return basicWidget.getValue();

     }

         public String getDisplayValue() {

             return basicWidget.getDisplayValue();

         }

         @Override

         public HandlerRegistration addValueChangeHandler(ValueChangeHandler<String> handler) {

                 return basicWidget.addValueChangeHandler(handler);

         }

         public void addValuesChangeHandler(ValueChangeHandler<List<String>> handler) {

         if(basicWidget != null)

                 basicWidget.addValuesChangeHandler(handler);

         }

         @Override

         public void addFocusLostCallback(Callback<Boolean> callback) {

                 basicWidget.addFocusLostCallback(callback);

         }

     public void setAdvancedSearchCallback(Callback<List<SelectedResults>> advancedSearchCallback) {

         this.advancedSearchCallback = advancedSearchCallback;

     }

     @Override

     public void setValue(Map<String, String> translations) {

         basicWidget.setValue(translations);

     }

 }