package org.kuali.student.lum.common.client.lo;

 import java.util.ArrayList;

 import java.util.HashMap;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

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

 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.lum.lo.dto.LoCategoryInfo;

 /**

  * @author Igor

  */

 public class LOBuilderBinding extends ModelWidgetBindingSupport<LOBuilder> {

     public static LOBuilderBinding INSTANCE = new LOBuilderBinding();

     private LOBuilderBinding() {}

     /**

      * Gets a list of OutlineNode from LOBuilder.  Goes through the list one by one.

      * While going through the list the algorithm keeps track of the current parent of

      * a particular level.

      */

     @Override

     public void setModelValue(LOBuilder builder, DataModel model, String path) {

         Data losData = new Data();

         Map<Integer, Data> parentStore = new HashMap<Integer, Data>();

         int sequence = 0; // the ordering information of DisplayInfo

         List<OutlineNode<LOPicker>> value = stripOutEmptyInput(builder.getValue());

         if (value != null) {

             for (OutlineNode<LOPicker> node : value) {

                 if (node.getIndentLevel() == 0) {

                     Data item = createLoDisplayInfoData(node, sequence);

                     parentStore.put(new Integer(0), item);

                     losData.add(item);

                 } else {

                     Data item = createLoDisplayInfoData(node, sequence);

                     LoDisplayInfoHelper parentItemHelper = null;

                     parentStore.put(node.getIndentLevel(), item);

                     parentItemHelper = new LoDisplayInfoHelper(

                             parentStore.get(node.getIndentLevel() - 1));

                     parentItemHelper.getDisplayInfoList().add(item);

                 }

                 sequence++;

             }

         }

         model.set(QueryPath.parse(path), losData);

     }

     @Override

     public void setWidgetValue(LOBuilder builder, DataModel model, String path) {

         List<OutlineNode<LOPicker>> loOutlineNodes = new ArrayList<OutlineNode<LOPicker>>();

         // change the 'courseSpecificLOs' elements into a List of OutlineNode's

         QueryPath qPath = QueryPath.parse(path);

         Data data = null;

         if (model != null) {

             data = model.get(qPath);

         }

         dataToOutlineNodes(data, loOutlineNodes, 0);

         builder.setValue(loOutlineNodes);

     }

     private List<OutlineNode<LOPicker>> stripOutEmptyInput(List<OutlineNode<LOPicker>> input) {

         List<OutlineNode<LOPicker>> value = new ArrayList<OutlineNode<LOPicker>>();

         boolean allEmptyNodes = true;

         if (input != null) {

             for (OutlineNode<LOPicker> node : input) {

                 String desc = node.getUserObject().getLOText();

                 int indentLevel = node.getIndentLevel();

                 List<LoCategoryInfo> categories = node.getUserObject().getLoCategories();

                 if (desc != null && desc.trim().length() > 0 || indentLevel > 0 || categories != null && !categories.isEmpty()) {

                     allEmptyNodes = false;

                     value.add(node);

                 }

             }

         }

         if (allEmptyNodes) {

             value = null;

         }

         return value;

     }

     private void dataToOutlineNodes(Data data, List<OutlineNode<LOPicker>> loOutlineNodes, int identLevel) {

         if (data != null) {

             LoDisplayInfoSortedSet sortedDisplayInfos = new LoDisplayInfoSortedSet();

             for (Data.Property property : data) {

                 Data loDisplayInfoData = property.getValue();

                 LoDisplayInfoHelper loDisplayInfoHelper = new LoDisplayInfoHelper(loDisplayInfoData);

                 sortedDisplayInfos.add(loDisplayInfoHelper);

             }

             for (LoDisplayInfoHelper loDisplayInfoHelper : sortedDisplayInfos) {

                 LOPicker picker = new LOPicker(LOBuilder.getMessageGroup(), LOBuilder.getType(), LOBuilder.getState(), LOBuilder.getRepoKey());

                 LoInfoHelper loInfoHelper = new LoInfoHelper(loDisplayInfoHelper.getLoInfo());

                 RichTextHelper descriptionHelper = new RichTextHelper(loInfoHelper.getDesc());

                 picker.setLOText(descriptionHelper.getPlain());

                 List<LoCategoryInfo> categories = getCategoryList(loDisplayInfoHelper);

                 picker.setLOCategories(categories);

                 picker.setMetaInfoData(loInfoHelper.getMetaInfo());

                 OutlineNode<LOPicker> node = new OutlineNode<LOPicker>();

                 node.setUserObject(picker);

                 node.setOpaque(loInfoHelper.getId());

                 node.setIndentLevel(identLevel);

                 loOutlineNodes.add(node);

                 // recurse

                 dataToOutlineNodes(loDisplayInfoHelper.getDisplayInfoList(), loOutlineNodes, identLevel + 1);

             }

         }

     }

     private List<LoCategoryInfo> getCategoryList(LoDisplayInfoHelper loDisplayInfoHelper) {

         List<LoCategoryInfo> categoryInfos = new ArrayList<LoCategoryInfo>();

         Data categoriesData = loDisplayInfoHelper.getCategoryInfoList();

         if (null != categoriesData) {

             Iterator<Data.Property> itr = categoriesData.realPropertyIterator();

             while (itr.hasNext()) {

                 Data.Property catProp = itr.next();

                 Data catData = catProp.getValue();

                 LoCategoryInfo catInfo = CategoryDataUtil.toLoCategoryInfo(catData);

                 categoryInfos.add(catInfo);

             }

         }

         return categoryInfos;

     }

     private Data createLoDisplayInfoData(OutlineNode<LOPicker> node, int sequence) {

         Data result = null;

         LoDisplayInfoHelper loDisplayInfoDataHelper = new LoDisplayInfoHelper(new Data());

         LoInfoHelper loInfoHelper = new LoInfoHelper(new Data());

         // loInfo.id

         loInfoHelper.setId((String) node.getOpaque());

         // loInfo.desc

         RichTextHelper richTextHelper = new RichTextHelper();

         String loDesc = node.getUserObject().getLOText();

         richTextHelper.setFormatted(loDesc);

         richTextHelper.setPlain(loDesc);

         loInfoHelper.setDesc(richTextHelper.getData());

         // loInfo.name

         if (null == loInfoHelper.getName() || loInfoHelper.getName().length() == 0) {

             loInfoHelper.setName("SINGLE USE LO");

         }

         // loCategoryInfoList

         Data categoriesData = new Data();

         for (LoCategoryInfo cat : node.getUserObject().getLoCategories()) {

             categoriesData.add(CategoryDataUtil.toData(cat));

         }

         // loInfo.sequence

         loInfoHelper.setSequence(Integer.toString(sequence));

         // loInfo.metaInfo

         loInfoHelper.setMetaInfo(node.getUserObject().getMetaInfoData());

         loDisplayInfoDataHelper.setLoInfo(loInfoHelper.getData());

         loDisplayInfoDataHelper.setCategoryInfoList(categoriesData);

         result = loDisplayInfoDataHelper.getData();

         return result;

     }

 }