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

 import java.util.ArrayList;

 import java.util.List;

 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.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.Data.DataValue;

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

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

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

 import org.kuali.student.lum.lu.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.getQueryParamValueList() != null && 

                 !membershipQueryInfo.getQueryParamValueList().isEmpty()) {

             labelText.append(getLookupDisplayName()).append(": ");

             for (SearchParam searchParam : membershipQueryInfo.getQueryParamValueList()) {

                 if (paramCounter > 0) {

                     labelText.append(" ");

                 }

                 labelText.append(getParameterDisplayName(searchParam.getKey())).append(" ");

                 labelText.append(searchParam.getValue());

                 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;

     }

 }