/**
    * 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 java.util.Iterator;
  
  import org.kuali.student.common.ui.client.configurable.mvc.multiplicity.MultiplicityGroup;
  import org.kuali.student.common.ui.client.configurable.mvc.multiplicity.MultiplicityGroupItem;
  import org.kuali.student.common.ui.client.mvc.DataModel;
  import org.kuali.student.core.assembly.data.Data;
  import org.kuali.student.core.assembly.data.QueryPath;
  import org.kuali.student.core.assembly.data.Data.Property;
  
  /**
   * This goes through each item in the MultiplicityGroup and calls it's binding
   *
   * @author Kuali Student Team
   */
  public class MultiplicityGroupBinding extends ModelWidgetBindingSupport<MultiplicityGroup> {
      public static MultiplicityGroupBinding INSTANCE = new MultiplicityGroupBinding();
  
      public MultiplicityGroupBinding() {};
  
      /**
       * @see ModelWidgetBindingSupport#setModelValue(Object,
       *      org.kuali.student.common.ui.client.mvc.DataModel, String)
       */
      public void setModelValue(MultiplicityGroup mcWidget, DataModel model, String path) {
          for (MultiplicityGroupItem item : mcWidget.getItems()) {
              MultiplicityGroupItemBinding.INSTANCE.setModelValue(item, model, mcWidget.getParentPath());
          }
          for (MultiplicityGroupItem item : mcWidget.getRemovedItems()) {
              //Check flag to add model binding for only those elements that are either added to the DB or
              // loading frm the DB.
              if(item.isCreated()==false){
                  MultiplicityGroupItemBinding.INSTANCE.setModelValue(item, model, path);
              }
          }
      }
  
      /**
       * @see ModelWidgetBindingSupport#setWidgetValue(Object,
       *      org.kuali.student.common.ui.client.mvc.DataModel, String)
       */
      public void setWidgetValue(MultiplicityGroup mg, DataModel model, String path) {
          mg.clear();
  
          String fieldPath = mg.translatePath(path);
   
  		mg.setParentPath(fieldPath);
  
          QueryPath qPath = QueryPath.parse(fieldPath);
          Data data = null;
          if(model!=null){
          	data = model.get(qPath);
          }
  
          if (data != null) {
              Iterator<Property> itr = data.iterator();
              while (itr.hasNext()) {
                  Property p = (Property) itr.next();
  
                  if (p.getKey() instanceof Integer && !isItemDeleted(model, path, (Integer)p.getKey(), mg)) {
                  	MultiplicityGroupItem mgi = mg.createItem();
                      mgi.setCreated(false);
                      mgi.setItemKey((Integer) p.getKey());
                      MultiplicityGroupItemBinding.INSTANCE.setWidgetValue(mgi, model, fieldPath);
                  } else {
                  	mg.incrementItemKey();
                  }
              }
          }
      }
  
      /**
       * Checks to see if an item at the given index in the multiplicity has been deleted
       *
       * @param model
       * @param path
       * @param index
       */
      public boolean isItemDeleted(DataModel model, String path, Integer index, MultiplicityGroup mcWidget){
      	boolean isDeleted = false;
  
      	// If multiplicity read only no point checking for deletions
      	if (!mcWidget.getConfig().isUpdateable()) {
 
     		QueryPath runtimeDeletedPath = QueryPath.concat(path, String.valueOf(index), MultiplicityGroupItemBinding.RT_DELETED);
 
     		Boolean runtimeDeleted = model.get(runtimeDeletedPath);
     		if (runtimeDeleted != null){
     			isDeleted = runtimeDeleted;
     		}
     		return isDeleted;
     	}
 
     	return isDeleted;
     }
 
 
 }