/**

  * 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.core.organization.ui.client.mvc.view;

 import java.util.List;

 import org.kuali.student.common.ui.client.application.KSAsyncCallback;

 import org.kuali.student.common.ui.client.configurable.mvc.views.VerticalSectionView;

 import org.kuali.student.common.ui.client.event.ModifyActionEvent;

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

 import org.kuali.student.common.ui.client.widgets.KSLabel;

 import org.kuali.student.core.organization.dto.OrgHierarchyInfo;

 import org.kuali.student.core.organization.dto.OrgTreeInfo;

 import org.kuali.student.core.organization.ui.client.service.OrgRpcService;

 import org.kuali.student.core.organization.ui.client.service.OrgRpcServiceAsync;

 import org.kuali.student.core.organization.ui.client.theme.OrgTreeImages;

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

 import com.google.gwt.event.dom.client.ClickEvent;

 import com.google.gwt.event.dom.client.ClickHandler;

 import com.google.gwt.event.logical.shared.OpenEvent;

 import com.google.gwt.event.logical.shared.OpenHandler;

 import com.google.gwt.user.client.DOM;

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

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

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

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

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

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

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

 public class OrgTree  extends Composite{

     private OrgRpcServiceAsync orgRpcServiceAsync = GWT.create(OrgRpcService.class);

     Panel  w = new SimplePanel();

     TreeImages images = (TreeImages)GWT.create(OrgTreeImages.class);

     Tree tree = new Tree(images);

     VerticalSectionView containingSection;

     boolean loaded = false;

     public OrgTree(){

         super.initWidget(w);

         w.add(tree);

         tree.setWidth("100%");

         KSLabel lbl = new KSLabel("Please Wait...");

         tree.addOpenHandler(new OpenHandler<TreeItem>(){

             @Override

             public void onOpen(OpenEvent<TreeItem> event) {

                 TreeItem item = event.getTarget();

                 Node rootNode = (Node)item.getWidget();

                 String orgId = rootNode.getOrgId();

                 String orgName = rootNode.getName();

                 item.removeItems();

                 item.addItem("");

                 if(item.getChildCount()==1){

                     getOrgTree(orgId,rootNode.getHierarchyId(),item);

                 }

             }

         });

     }

     public OrgTree(VerticalSectionView section) {

         this();

         this.containingSection = section;

     }

     public boolean isLoaded(){

         return loaded;

     }

     public void setLoaded(boolean loaded){

         this.loaded=loaded;

     }

     protected void onLoad(){

         if (!loaded){

             loaded = true;

         orgRpcServiceAsync.getOrgHierarchies(new KSAsyncCallback<List<OrgHierarchyInfo>>(){

             public void onSuccess(List<OrgHierarchyInfo> result) {

                 if(result != null){

                     for(final OrgHierarchyInfo orgHInfo:result){

                         // setting maxLevel to -1 to obtain only the root Node

                         orgRpcServiceAsync.getOrgDisplayTree(orgHInfo.getRootOrgId(), orgHInfo.getId(), -1, new KSAsyncCallback<List<OrgTreeInfo> >(){

                             @Override

                             public void onSuccess(List<OrgTreeInfo> result) {

                                 OrgTreeInfo root = result.get(0);

                                 TreeItem item = new TreeItem(new RootNode(root.getOrgId(),root.getDisplayName(),root.getPositions(),root.getOrgHierarchyId()));

                                 tree.addItem(item);

                                 item.addItem("");

                             }

                         });

                     }                

                 }

             }

         });

         }

     }

     protected void getOrgTree(final String orgId, final String hierarchyId, final TreeItem node){

         //Setting Max level to 1 to obtain relations at the first level.

         orgRpcServiceAsync.getOrgDisplayTree(orgId, hierarchyId, 1, new KSAsyncCallback<List<OrgTreeInfo> >(){

             @Override

             public void onSuccess(List<OrgTreeInfo> result) {

                 for(OrgTreeInfo orgTreeInfo:result){

                     if (!orgTreeInfo.getOrgId().equals(orgId)) {

                         TreeItem item = new TreeItem(new OrgWidget(orgTreeInfo.getOrgId(), orgTreeInfo.getDisplayName(), orgTreeInfo.getPositions(), hierarchyId));

                         node.addItem(item);

                         item.addItem("");

                     }

                 }

                 node.getChild(0).remove();

                 node.setState(true, false);

             }

         });

     }

     private class RootNode  extends Composite implements Node{

         VerticalPanel w = new VerticalPanel();

         String orgId;

         String name;

         String hierarchyId;

         boolean showMembers = false;

         public String getOrgId(){

             return orgId;

         }

         public String getName(){

             return name;

         }

         public String getHierarchyId(){

             return hierarchyId;

         }

         public RootNode( final String orgId,String name,final long positions, String hierarchyId){

             super.initWidget(w);

             this.name=name;

             this.orgId=orgId;

             this.hierarchyId = hierarchyId;

             KSLabel label = new KSLabel(name);

             label.addStyleName("KS-Org-Tree-Label");

             final MembersTable memberTable = new MembersTable();

             DOM.setElementAttribute(memberTable.getElement(), "id", "orgTreeMemberTable");

             memberTable.setOrgId(orgId);

             ClickHandler handlerModify = new ClickHandler() {

                 @Override

                 public void onClick(ClickEvent event) {

                     Controller orgController = containingSection.getController();

                     orgController.fireApplicationEvent(new ModifyActionEvent(orgId));

                 }

             };

             label.addClickHandler(handlerModify);

             ClickHandler memberHandler = new ClickHandler() {

                 @Override

                 public void onClick(ClickEvent event) {

                     if(!showMembers){

                         ((KSLabel)event.getSource()).getElement().setInnerText("Hide Members " + "["+ positions + "]");

                         w.add(memberTable);

                         memberTable.fetchMemberTable();

                         memberTable.setVisible(true);

                         showMembers = true;

                     }

                     else{

                         ((KSLabel)event.getSource()).getElement().setInnerText("Members " + "["+ positions + "]");

                         memberTable.setVisible(false);

                         showMembers = false;

                     }

                 }

             };

             final KSLabel members = new KSLabel("Members " + "["+ positions + "]");

             members.addStyleName("action");

             members.addClickHandler(memberHandler);

             members.getElement().setAttribute("value", "");

             w.add(label);

             w.add(members);

             w.addStyleName("KS-Org-Tree-Section");

             addStyleName("KS-Org-Widget");

         }

     }

     private class OrgWidget extends Composite implements Node{

         VerticalPanel w = new VerticalPanel();

         boolean showMembers = false;

         String orgId;

         String name;

         String hierarchyId;

         public String getOrgId(){

             return orgId;

         }

         public String getName(){

             return name;

         }

         public String getHierarchyId(){

             return hierarchyId;

         }

         public OrgWidget(final String id, final String name, final long positions, String hierarchyId) {

             super.initWidget(w);

             this.name = name;

             this.orgId=id;

             this.hierarchyId=hierarchyId;

             final MembersTable memberTable = new MembersTable();

             DOM.setElementAttribute(memberTable.getElement(), "id", "orgTreeMemberTable");

             memberTable.setOrgId(id);

             final KSLabel label = new KSLabel(name);

             label.addStyleName("KS-Org-Tree-Label");

             ClickHandler handlerModify = new ClickHandler() {

                 @Override

                 public void onClick(ClickEvent event) {

                     Controller orgController = containingSection.getController();

                     orgController.fireApplicationEvent(new ModifyActionEvent(id));

                 }

             };

             label.addClickHandler(handlerModify);

             ClickHandler memberHandler = new ClickHandler() {

                 @Override

                 public void onClick(ClickEvent event) {

                     if(!showMembers){

                         ((KSLabel)event.getSource()).getElement().setInnerText("Hide Members " + "["+ positions + "]");

                         w.add(memberTable);

                         memberTable.fetchMemberTable();

                         memberTable.setVisible(true);

                         showMembers = true;

                     }

                     else{

                         ((KSLabel)event.getSource()).getElement().setInnerText("Members " + "["+ positions + "]");

                         memberTable.setVisible(false);

                         showMembers = false;

                     }

                 }

             };

             final KSLabel members = new KSLabel("Members " + "["+ positions + "]");

             members.addStyleName("action");

             members.addClickHandler(memberHandler);

             members.getElement().setAttribute("value", "");

             w.add(label);

             w.add(members);

             w.addStyleName("KS-Org-Tree-Section");

             addStyleName("KS-Org-Widget");

         }

     }

     interface Node{

         public String getOrgId();

         public String getName();

         public String getHierarchyId();

     }

 }