/**
    * 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.configurable.mvc.binding;
  
  import org.kuali.student.common.ui.client.configurable.mvc.multiplicity.MultiplicityGroupItem;
  import org.kuali.student.common.ui.client.configurable.mvc.sections.Section;
  import org.kuali.student.common.ui.client.configurable.mvc.sections.SectionBinding;
  import org.kuali.student.common.ui.client.mvc.DataModel;
  import org.kuali.student.r1.common.assembly.data.QueryPath;
  
  import com.google.gwt.core.client.GWT;
  import com.google.gwt.user.client.ui.Widget;
  
  /**
   * This binding simply adds an index key to the multiplicity item's parent path and then calls the binding ModelWidgetBinding
   * of the underlying multiplicity item's widget.
   *
   * @author Kuali Student Team
   */
  public class MultiplicityGroupItemBinding extends ModelWidgetBindingSupport<MultiplicityGroupItem> {
      public static MultiplicityGroupItemBinding INSTANCE = new MultiplicityGroupItemBinding();
  
      protected static final String RT_CREATED = "_runtimeData" + QueryPath.getPathSeparator() + "created";
      protected static final String RT_UPDATED = "_runtimeData" + QueryPath.getPathSeparator() + "updated";
      protected static final String RT_DELETED = "_runtimeData" + QueryPath.getPathSeparator() + "deleted";
  
      private MultiplicityGroupItemBinding() {};
  
      /**
       * @see ModelWidgetBindingSupport#setModelValue(Object,
       *      org.kuali.student.common.ui.client.mvc.DataModel, String)
       */
      @Override
      public void setModelValue(MultiplicityGroupItem multiplicityItem, DataModel model, String path) {
          String itemPath = QueryPath.concat(path, String.valueOf(multiplicityItem.getItemKey())).toString();
      	String itemRuntimePath = itemPath;
          Widget widget = multiplicityItem.getItemWidget();
          
          boolean multiplicityItemIsDirty = false;
          if (widget instanceof Section) {        	
          	if (((Section)widget).isDirty()){
          		//Only update model if multiplicity section is dirty.
  	        	itemPath = "";
  	            SectionBinding.INSTANCE.setModelValue((Section) widget, model, itemPath);
  	            multiplicityItemIsDirty = true;
          	} 
          } else if (widget instanceof ModelWidgetBinding) {
              ((ModelWidgetBinding) widget).setModelValue(widget, model, path);
              multiplicityItemIsDirty = true;
          } else {
              GWT.log(itemPath + " has no widget binding.", null);
          }
  
          // Multiplicity metadata?
         if (multiplicityItemIsDirty || multiplicityItem.isDeleted()){
  	        QueryPath qPath;
  	        if (multiplicityItem.isCreated()) {
  	            qPath = QueryPath.parse(itemRuntimePath + QueryPath.getPathSeparator() + RT_CREATED);
  	        } else if (multiplicityItem.isDeleted()) {
  	            qPath = QueryPath.parse(itemRuntimePath + QueryPath.getPathSeparator() + RT_DELETED);
  	        } else {
  	            qPath = QueryPath.parse(itemRuntimePath + QueryPath.getPathSeparator() + RT_UPDATED);
  	        }
  	        try {
  	            Boolean oldValue = model.get(qPath);
  	            Boolean newValue = true;
  	            if (!nullsafeEquals(oldValue, newValue)) {
  	                model.set(qPath, newValue);
  	                setDirtyFlag(model, qPath);
  	            }
  	        } catch (IllegalArgumentException e) {
  	            // model.get(qPath) will throw this exception if there is no such path
  	            GWT.log("Warning: Ignoring error attempting to setValue for " + widget.getClass().getName() + " path: " + qPath, e);
  	        }
         }
  
      }
  
      /**
       * @see ModelWidgetBindingSupport#setWidgetValue(Object,
       *      org.kuali.student.common.ui.client.mvc.DataModel, String)
       */
      @Override
      public void setWidgetValue(MultiplicityGroupItem multiplicityItem, DataModel model, String path) {
  //        String itemPath = path + QueryPath.getPathSeparator() + multiplicityItem.getItemKey();
          String itemPath ="";
         Widget widget = multiplicityItem.getItemWidget();
         if (widget instanceof Section) {
             SectionBinding.INSTANCE.setWidgetValue((Section) widget, model, itemPath);
         } else if (widget instanceof ModelWidgetBinding) {
             ((ModelWidgetBinding) widget).setWidgetValue(widget, model, path);
         } else {
             GWT.log(itemPath + " has no widget binding.", null);
         }
 
         multiplicityItem.setCreated(false);
         multiplicityItem.setCreated(false);
     }
 
 
 }