package org.kuali.student.common.ui.client.widgets;
   
   import java.util.ArrayList;
   import java.util.List;
   
   import org.kuali.student.common.assembly.data.QueryPath;
   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.common.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;
 	}
 }