/**

  * 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

  * <p/>

  * http://www.osedu.org/licenses/ECL-2.0

  * <p/>

  * 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.

  * <p/>

  */

 package org.kuali.student.common.ui.client.configurable.mvc.binding;

 import java.util.Iterator;

 import java.util.List;

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

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

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

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

 import org.kuali.student.common.ui.client.configurable.mvc.multiplicity.MultiplicityFieldConfiguration;

 import org.kuali.student.common.ui.client.configurable.mvc.multiplicity.MultiplicityTable;

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

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

 /**

  * This class handles transferring data between the model and the widgets 

  */

 public class MultiplicityTableBinding extends ModelWidgetBindingSupport<MultiplicityTable> {

     /**

      * @see ModelWidgetBindingSupport#setModelValue(Object,

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

      */

     public void setModelValue(MultiplicityTable table, DataModel model, String path) {

         // Not required  - MultiplicityTable is read only

         GWT.log("Method setModelValue not implemented for MultiplicityTable");

     }

     /**

      * @see ModelWidgetBindingSupport#setWidgetValue(Object,

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

      */

     public void setWidgetValue(MultiplicityTable table, DataModel model, String path) {

         table.initTable();

         path = path.trim();

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

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

         }

         QueryPath qPath = QueryPath.parse(path);

         Data data = null;

         if (model != null) {

             data = model.get(qPath);

         }

         if (data != null) {

             Iterator<Data.Property> iter1 = data.iterator();

             if (iter1.hasNext()) {

                 table.buildHeaders();

                 // iterate through data

                 while (iter1.hasNext()) {

                     Data.Property prop = iter1.next();

                     Object value = prop.getValue();

                     if (value instanceof String) {

                         Metadata metadata = model.getMetadata(qPath);

                         String dataValue = null;

                         if(metadata!=null&&metadata.getInitialLookup()!=null){

                             QueryPath translatedPath = QueryPath.concat("_runtimeData", prop.getKey().toString(), "id-translation");

                             dataValue = data.query(translatedPath);

                         }

                         if (dataValue == null)

                             dataValue = (String)value;

                         table.addNextCell(dataValue);                        

                         table.nextRow();

                     }

                     else {

                         Data rowData = prop.getValue();

                         // iterate through the fields defined for this table

                         for (Integer row  : table.getConfig().getFields().keySet()) {

                             List<MultiplicityFieldConfiguration> fieldConfigs = table.getConfig().getFields().get(row);

                             for (MultiplicityFieldConfiguration fieldConfig : fieldConfigs) {

                                 QueryPath fullPath = QueryPath.parse(fieldConfig.getFieldPath());

                                 QueryPath fieldPath = translatePath(path, fullPath, model);                           

                                 Object o = rowData.query(fieldPath);

                                 if (o != null) {

                                     // multiple values required in the table cell, concatenate values

                                     // with comma separator

                                     if (o instanceof Data) {

                                         Data cellData = (Data) o;

                                         // iterate through the field keys to produce a comma delimited list

                                         // of values in a single cell of the table

                                         if (cellData != null && cellData.size() > 0) {

                                             StringBuilder sb = new StringBuilder();

                                             Iterator<Data.Property> iter = cellData.realPropertyIterator();

                                             while (iter.hasNext()) {

                                                 Data.Property p = iter.next();

                                                 Data d = p.getValue();

                                                 String key = table.getConfig().getConcatenatedFields().get(fullPath.toString());

                                                 sb.append(d.get(key)).append(", ");

                                             }

                                             sb.deleteCharAt(sb.lastIndexOf(", "));

                                             table.addNextCell((sb.toString()));

                                         } else {

                                             table.addEmptyCell();

                                         }

                                     }

                                     // a single value required in a single table cell

                                     else {

                                         table.addNextCell((o.toString()));

                                     }

                                 } else {

                                     table.addEmptyCell();

                                 }                                

                             }

                             table.nextRow();

                         }

                     }

                 }

             }

         }

     }

     /**

      * 

      * This method checks the meta data for an initial lookup for this field. If found, the field path

      * is translated to lookup the id_translation data in the _runtimeData structure in the model

      * 

      * @param path

      * @param fullPath

      * @param model

      * @return

      */

     private QueryPath translatePath(String path, QueryPath fullPath, DataModel model) {

         QueryPath parentPath = QueryPath.parse(path);

         int i = parentPath.size();

         Metadata metadata = model.getMetadata(fullPath);

         QueryPath fieldPath = null;

         if(metadata!=null&&metadata.getInitialLookup()!=null){

             if (metadata.getDataType().equals(DataType.STRING)) {

                 QueryPath translatedPath = fullPath.subPath(0, fullPath.size()-1);

                 translatedPath.add(new Data.StringKey("_runtimeData"));

                 translatedPath.add(new Data.StringKey((String)fullPath.get(fullPath.size() - 1).get()));

                 translatedPath.add(new Data.StringKey("id-translation"));

                 fieldPath  =  translatedPath.subPath(i, translatedPath.size());

             }

             else {

                 fieldPath =  fullPath.subPath(i, fullPath.size());

             }

         }

         else {

             fieldPath =  fullPath.subPath(i, fullPath.size());

         }

         if (fieldPath.get(0).toString().equals(QueryPath.getWildCard())) {

             fieldPath.remove(0);

         }

         return fieldPath;

     }

 }