/**

  * 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.sections;

 import java.util.Date;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import org.kuali.student.common.assembly.data.Data;

 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.configurable.mvc.FieldDescriptorReadOnly;

 import org.kuali.student.common.ui.client.configurable.mvc.binding.ModelWidgetBinding;

 import org.kuali.student.common.ui.client.configurable.mvc.binding.ModelWidgetBindingSupport;

 import org.kuali.student.common.ui.client.mvc.DataModel;

 import com.google.gwt.core.client.GWT;

 import com.google.gwt.user.client.ui.Widget;

 /**

  * Model widget binding for a section - calls the bindings on its fields and sub sections.  Special handling

  * for sections which can have their sections deleted by the user.

  * 

  * @author Kuali Student Team

  *

  */

 public class SectionBinding extends ModelWidgetBindingSupport<Section> {

         public static SectionBinding INSTANCE = new SectionBinding();

     private SectionBinding() {};

     /**

      * @see org.kuali.student.common.ui.client.configurable.mvc.binding.ModelWidgetBindingSupport#setModelValue(java.lang.Object,

      *      org.kuali.student.common.ui.client.mvc.DataModel, java.lang.String)

      */

     @Override

     public void setModelValue(Section section, DataModel model, String path) {

         List<FieldDescriptor> fields = section.getUnnestedFields();

         Map<String, Object> selectedData = null;

         for (int i = 0; i < fields.size(); i++) {

                 if(!(fields.get(i) instanceof FieldDescriptorReadOnly)){

                         FieldDescriptor field = (FieldDescriptor) fields.get(i);

                     String fieldPath = path + QueryPath.getPathSeparator() + field.getFieldKey();

                     fieldPath = fieldPath.trim();

                     if (fieldPath.startsWith(QueryPath.getPathSeparator())) {

                         fieldPath = fieldPath.substring(QueryPath.getPathSeparator().length());

                     }

                     ModelWidgetBinding binding = field.getModelWidgetBinding();

                     if (binding != null) {

                         Widget w = field.getFieldWidget();

                         binding.setModelValue(w, model, fieldPath);

                     } else {

                         GWT.log(field.getFieldKey() + " has no widget binding.", null);

                     }

             }

         }

         if(section instanceof HasSectionDeletion){

                 List<Section> deleted =((HasSectionDeletion) section).getDeletedSections();

                 for(int i =0; i < deleted.size(); i++){

                         Section deletedSection = deleted.get(i);

                         //get all fields and delete them>

                         List<FieldDescriptor> deletedFields = deletedSection.getFields();

                         for(int j = 0; j < deletedFields.size(); j++){

                                 FieldDescriptor field = deletedFields.get(j);

                                 model.remove(QueryPath.parse(field.getFieldKey()));

                         }

                 }

         }

         for (Section s : section.getSections()) {

             // data of the HasSectionDeletion section that should be in the model 

                 if(section instanceof HasSectionDeletion){

                         List<Section> deleted =((HasSectionDeletion) section).getDeletedSections();

                         List<String> deletionParentKeys = ((HasSectionDeletion) section).getDeletionParentKeys();

                         if (deletionParentKeys != null) {

                             for (String deletionParentKey : deletionParentKeys) {

                                 model.remove(QueryPath.parse(deletionParentKey));

                             }

                         }

                         // section is not deleted update model with the data from widget.  Keep

                         // a record of the list of data so that they can be added back into the model

                         if(!deleted.contains(s)){

                                 s.updateModel(model);

                     if (deletionParentKeys != null) {

                         for (String deletionParentKey : deletionParentKeys) {

                             selectedData = (selectedData == null)? 

                                     new HashMap<String, Object>() : selectedData;

                             selectedData.put(deletionParentKey, model.get(deletionParentKey));

                         }

                     }

                         } else if (selectedData != null && !selectedData.isEmpty()) {

                             for (String key : selectedData.keySet()) {

                                 setValue(model, key, selectedData.get(key));

                             }

                         }

                 }

                 else{

                         s.updateModel(model);

                 }      

         }

     }

     private void setValue(DataModel model, String path, Object value) {

         QueryPath qPath = QueryPath.parse(path);

         if (value instanceof String) {

             model.set(qPath, (String) value);

         } else if (value instanceof Integer) {

             model.set(qPath, (Integer) value);

         } else if (value instanceof Long) {

             model.set(qPath, (Long) value);

         } else if (value instanceof Float) {

             model.set(qPath, (Float) value);

         } else if (value instanceof Double) {

             model.set(qPath, (Double) value);

         } else if (value instanceof Boolean) {

             model.set(qPath, (Boolean) value);

         } else if (value instanceof Date) {

             model.set(qPath, (Date) value);

         } else if (value instanceof Data) {

             model.set(qPath, (Data) value);

         }

     }

     /**

      * @see org.kuali.student.common.ui.client.configurable.mvc.binding.ModelWidgetBindingSupport#setWidgetValue(java.lang.Object,

      *      org.kuali.student.common.ui.client.mvc.DataModel, java.lang.String)

      */

         @Override

         public void setWidgetValue(Section section, DataModel model, String path) {

         List<FieldDescriptor> fields = section.getUnnestedFields();

         for (int i = 0; i < fields.size(); i++) {

             FieldDescriptor field = fields.get(i);

             ModelWidgetBinding binding = field.getModelWidgetBinding();

             String fieldPath = path + QueryPath.getPathSeparator() + field.getFieldKey();

             if (binding != null) {

                 Widget w = field.getFieldWidget();

                 binding.setWidgetValue(w, model, fieldPath);

             } else {

                 GWT.log(field.getFieldKey() + " has no widget binding.", null);

             }

         }

         for (Section s : section.getSections()) {

             s.updateWidgetData(model);

         }

         }

 }