package org.kuali.student.common.ui.client.widgets;

 import java.util.ArrayList;

 import java.util.List;

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

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

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

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

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

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

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

 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.HasBlurHandlers;

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

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

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

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

 public class ListOfStringWidget extends Composite implements HasBlurHandlers{

     private String addItemText;

         private boolean loaded = false;

         private FlowPanel mainPanel = new FlowPanel();

         private FlowPanel itemsPanel = new FlowPanel();

         private ArrayList<String> values = new ArrayList<String>();

         final KSTextBox inputText = new KSTextBox();

         private FieldDescriptor fd;

         private DataModelValidator validator = new DataModelValidator();

         public ListOfStringWidget(String addItemText) {

                 super();

                 super.initWidget(mainPanel);

                 this.addItemText = addItemText;

         }

         public void onLoad() {

         if (!loaded) {            

                 KSButton addItemButton = new KSButton(addItemText);

             addItemButton.addClickHandler(new ClickHandler(){

                                 public void onClick(ClickEvent event) {

                                         //add validate

                                         List<ValidationResultInfo> results = new ArrayList<ValidationResultInfo>();

                                         validator.doValidateString(inputText.getText(),QueryPath.parse(fd.getFieldKey()), fd.getMetadata(), results);

                                         if(results.isEmpty()){

                                                 addListItem(inputText.getText());

                                                 inputText.setText("");

                                         }else if(fd != null && fd.getFieldElement() != null){

                                                 for(ValidationResultInfo vr:results){

                                                         fd.getFieldElement().processValidationResult(vr);

                                                 }

                                         }

                                 }

             });

             mainPanel.add(inputText);

             mainPanel.add(addItemButton);

             mainPanel.add(itemsPanel);            

             loaded = true;

         }

     }

         public ArrayList<String> getStringValues(){

                 return values;

         }

         public void setStringValues(ArrayList<String> values){

                 itemsPanel.clear();

                 if(values!=null){

                         for(String value:values){

                                 addListItem(value);

                         }

                 }

         }

         protected void addListItem(String itemValue){

                 final FlowPanel item = new FlowPanel();

                 final String curVal = itemValue;

                 if (!values.contains(itemValue)) {

                         String fieldHTMLId = HTMLPanel.createUniqueId();

                 LabelPanel fieldTitle = new LabelPanel(itemValue, fieldHTMLId);

                     AbbrButton delButton = new AbbrButton(AbbrButtonType.DELETE);

                     delButton.addClickHandler(new ClickHandler() {

                                 public void onClick(ClickEvent event) {

                                         itemsPanel.remove(item);

                                         values.remove(curVal);

                                 }

                         });

                 fieldTitle.add(delButton);

                 item.add(fieldTitle);

                         itemsPanel.add(item);

                         values.add(curVal);

                 }

         }

         @Override

         public HandlerRegistration addBlurHandler(BlurHandler handler) {

                 return inputText.addBlurHandler(handler);

         }

         public void setFd(FieldDescriptor fd) {

                 this.fd = fd;

         }

 }