package org.kuali.student.lum.lu.ui.tools.client.widgets;
   
   import java.util.ArrayList;
   import java.util.List;
   
   import org.kuali.student.r1.common.assembly.data.Data;
   import org.kuali.student.r1.common.assembly.data.LookupMetadata;
   import org.kuali.student.r1.common.assembly.data.LookupParamMetadata;
   import org.kuali.student.r1.common.assembly.data.Data.DataValue;
  import org.kuali.student.r1.common.assembly.data.Data.Value;
  import org.kuali.student.r1.common.search.dto.SearchParam;
  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.widgets.KSLabel;
  import org.kuali.student.lum.common.client.widgets.CluSetRangeModelUtil;
  import org.kuali.student.r2.core.search.dto.SearchParamInfo;
  import org.kuali.student.r2.lum.clu.dto.MembershipQueryInfo;
  
  import com.google.gwt.event.dom.client.ClickEvent;
  import com.google.gwt.event.dom.client.ClickHandler;
  import com.google.gwt.user.client.ui.Composite;
  import com.google.gwt.user.client.ui.HorizontalPanel;
  import com.google.gwt.user.client.ui.SimplePanel;
  
  public class CluSetRangeLabel extends Composite implements HasDataValue {
  
      private MembershipQueryInfo membershipQueryInfo;
      protected SimplePanel mainPanel = new SimplePanel();
      private KSLabel label = new KSLabel();
      private KSLabel delete = new KSLabel(" X ");
      private LookupMetadata lookupMetadata;
      private List<Callback<Value>> valueChangeCallbacks =
          new ArrayList<Callback<Value>>();
      private boolean initialized;
  
      public CluSetRangeLabel() {
          super.initWidget(mainPanel);
      }
      
      @Override
      public Value getValue() {
          DataValue value = new DataValue(
                  CluSetRangeModelUtil.INSTANCE.toData(membershipQueryInfo));
          return value;
      }
  
      @Override
      public void setValue(Value value) {
          membershipQueryInfo = null;
          if (value != null) {
              Data d = value.get();
              membershipQueryInfo = CluSetRangeModelUtil.INSTANCE.toMembershipQueryInfo(d);
          }
          callHandlers();
          redraw();
      }
      
      @Override
      public void addValueChangeCallback(Callback<Value> callback) {
          valueChangeCallbacks.add(callback);
      }
      
      private void callHandlers() {
          if (valueChangeCallbacks != null) {
  //            MyGwtEvent myEvent = new MyGwtEvent(getValue());
              for (Callback<Data.Value> handler : valueChangeCallbacks) {
                  handler.exec(getValue());
              }
          }
      }
  
      private void redraw() {
          StringBuilder labelText = new StringBuilder();
          int paramCounter = 0;
          HorizontalPanel labelPanel = new HorizontalPanel();
          labelPanel.add(label);
          mainPanel.clear();
          mainPanel.setWidget(labelPanel);
          label.setText("");
          if (!initialized) {
              delete.addClickHandler(new ClickHandler() {
                  @Override
                  public void onClick(ClickEvent event) {
                      membershipQueryInfo = null;
                      label.setText("");
                      callHandlers();
                  }
              });
              initialized = true;
          }
          if (membershipQueryInfo != null && membershipQueryInfo.getQueryParamValues() != null && 
                  !membershipQueryInfo.getQueryParamValues().isEmpty()) {
              labelText.append(getLookupDisplayName()).append(": ");
              for (SearchParamInfo searchParam : membershipQueryInfo.getQueryParamValues()) {
                  if (paramCounter > 0) {
                      labelText.append(" ");
                  }
                  labelText.append(getParameterDisplayName(searchParam.getKey())).append(" ");
                  labelText.append(searchParam.getValues().get(0));
                 paramCounter++;
             }
             label.setText(labelText.toString());
             labelPanel.add(delete);
         }
     }
     
     private String getLookupDisplayName() {
         String lookupDisplayName = null;
         if (lookupMetadata == null) {
             lookupDisplayName = membershipQueryInfo.getSearchTypeKey();
         } else {
             lookupDisplayName = lookupMetadata.getName();
         }
         return lookupDisplayName;
     }
     
     private String getParameterDisplayName(String parameterKey) {
         String parameterDisplayName = null;
         if (lookupMetadata == null) {
             parameterDisplayName = parameterKey;
         } else {
             List<LookupParamMetadata> searchParams = lookupMetadata.getParams();
             if (searchParams != null) {
                 for (LookupParamMetadata searchParam : searchParams) {
                     if (nullSafeEquals(searchParam.getKey(), parameterKey)) {
                         parameterDisplayName = searchParam.getName();
                     }
                 }
             }
             if (parameterDisplayName == null) {
                 parameterDisplayName = parameterKey;
             }
         }
         return parameterDisplayName;
     }
     
     private boolean nullSafeEquals(Object str1, Object str2) {
         return (str1 == null && str2 == null ||
                 str1 != null && str2 != null && str1.equals(str2));
     }
     
 //    public class MyGwtEvent extends ValueChangeEvent<Data.Value> {
 //        public MyGwtEvent(Data.Value value) {
 //            super(value);
 //        }
 //    }
 
     public LookupMetadata getLookupMetadata() {
         return lookupMetadata;
     }
 
     public void setLookupMetadata(LookupMetadata lookupMetadata) {
         this.lookupMetadata = lookupMetadata;
     }
 
 }