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

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

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

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

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

 import org.kuali.student.common.ui.client.widgets.menus.KSListPanel;

 import java.util.*;

 /**

  * @author Igor

  */

 public class TreeStringBinding extends ModelWidgetBindingSupport<KSListPanel> {

     @Override

     public void setModelValue(KSListPanel widget, DataModel model, String path) {

         throw new UnsupportedOperationException("Method is not supported");

     }

     @Override

     public void setWidgetValue(KSListPanel listPanel, DataModel model, String path) {

         listPanel.clear();

         Data loData = model.get(path);

         if (loData != null) {

             StringTreeStructure rootModel = new StringTreeStructure();

             transform(loData, rootModel);

             bind(rootModel, listPanel);

         }

     }

     private void transform(Data loData, StringTreeStructure rootModel) {

         for (Data.Property property : loData) {

             Data loDisplayInfoData = property.getValue();

             LoDisplayInfoHelper loDisplayInfoHelper = new LoDisplayInfoHelper(loDisplayInfoData);

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

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

             Data categoriesData = loDisplayInfoHelper.getCategoryInfoList();

             List<String> categories = new ArrayList<String>();

             if (null != categoriesData) {

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

                 while (itr.hasNext()) {

                     Data.Property catProp = itr.next();

                     Data catData = catProp.getValue();

                     LoCategoryInfoHelper category = new LoCategoryInfoHelper(catData);

                     categories.add(category.getName());

                 }

             }

             int index = 0;

             String sequence = loInfoHelper.getSequence();

             if (sequence != null) {

                 index = Integer.parseInt(sequence);

             } 

             StringTreeStructure childModel = new StringTreeStructure(index, descriptionHelper.getPlain(), categories);

             transform(loDisplayInfoHelper.getDisplayInfoList(), childModel);

             rootModel.addChild(childModel);

         }

     }

     private void bind(StringTreeStructure stringTreeStructure, KSListPanel ksListPanel) {

         stringTreeStructure.sortChildren();

         List<StringTreeStructure> firstLevelChildren = stringTreeStructure.getChildren();

         for (StringTreeStructure firstLevelChild : firstLevelChildren) {

             addElement(firstLevelChild, ksListPanel);

         }

     }

     private void addElement(StringTreeStructure element, KSListPanel listPanel) {

         if (element.hasChildren()) {

             KSListPanel subPanel = new KSListPanel();

             element.sortChildren();

             for (StringTreeStructure child : element.getChildren()) {

                 addElement(child, subPanel);

             }

             if (!element.getCategories().isEmpty()) {

                 listPanel.add(subPanel, element.getValue() + element.getCategoriesString());

             } else {

                 listPanel.add(subPanel, element.getValue());

             }

         } else {

             if (!element.getCategories().isEmpty()) {

                 listPanel.add(new Label(element.getValue() + element.getCategoriesString()));

             } else {

                 listPanel.add(new Label(element.getValue()));

             }

         }

     }

     private static class StringTreeStructure {

         private String value;

         private int index;

         private List<StringTreeStructure> children = new ArrayList<StringTreeStructure>();

         private List<String> categories = new LinkedList<String>();

         public StringTreeStructure(int index, String value, List<String> categories) {

             this.setIndex(index);

             this.value = value;

             this.categories = categories;

         }

         public void sortChildren() {

             Collections.sort(children, new Comparator<StringTreeStructure>() {

                 @Override

                 public int compare(StringTreeStructure o1, StringTreeStructure o2) {

                     return o1.getIndex() - o2.getIndex();

                 }

             });

         }

         public StringTreeStructure() {}

         public List<String> getCategories() {

             return categories;

         }

         public String getValue() {

             return value;

         }

         public void setValue(String value) {

             this.value = value;

         }

         public List<StringTreeStructure> getChildren() {

             return children;

         }

         public void setChildren(List<StringTreeStructure> children) {

             this.children = children;

         }

         public void addChild(StringTreeStructure child) {

             children.add(child);

         }

         public boolean hasChildren() {

             return !children.isEmpty();

         }

         public void setIndex(int index) {

             this.index = index;

         }

         public int getIndex() {

             return index;

         }

         public String getCategoriesString() {

             String result = " (";

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

                 if (i != categories.size() - 1) {

                     result = result + categories.get(i) + ", ";

                 } else {

                     result = result + categories.get(i) + ")";

                 }

             }

             return result;

         }

     }

 }