/**

  * 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.lum.lu.ui.main.client;

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

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

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

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

 import org.kuali.student.common.ui.client.mvc.breadcrumb.BreadcrumbManager;

 import org.kuali.student.common.ui.client.mvc.history.HistoryManager;

 import org.kuali.student.common.ui.client.service.MessagesRpcService;

 import org.kuali.student.common.ui.client.service.SecurityRpcService;

 import org.kuali.student.common.ui.client.service.SecurityRpcServiceAsync;

 import org.kuali.student.common.ui.client.util.BrowserUtils;

 import org.kuali.student.common.ui.client.util.WindowTitleUtils;

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

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

 import org.kuali.student.core.messages.dto.MessageList;

 import org.kuali.student.lum.common.client.widgets.AppLocations;

 import org.kuali.student.lum.lu.ui.main.client.controllers.ApplicationController;

 import org.kuali.student.lum.lu.ui.main.client.theme.LumTheme;

 import org.kuali.student.lum.lu.ui.main.client.widgets.ApplicationHeader;

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

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

 import com.google.gwt.dom.client.StyleInjector;

 import com.google.gwt.user.client.rpc.SerializationException;

 import com.google.gwt.user.client.rpc.SerializationStreamFactory;

 import com.google.gwt.user.client.rpc.SerializationStreamReader;

 public class LUMMainEntryPoint implements EntryPoint{

     private ApplicationController manager = null;

     private AppLocations locations = new AppLocations();

     private ApplicationHeader header = GWT.create(ApplicationHeader.class);

     @Override

     public void onModuleLoad() {

         final ApplicationContext context = Application.getApplicationContext();

         final String injectString = LumTheme.INSTANCE.getLumCss().getCssString();

         StyleInjector.injectStylesheet(injectString);   

         try {

             loadMessages(context);                    

             loadApp(context);

         } catch (Exception e) {

             GWT.log("Error loading entrypoint", e);

         } 

     }

     private void initScreen(){

         manager = new ApplicationController("KualiStudent", header);

         WindowTitleUtils.setApplicationTitle(Application.getApplicationContext().getMessage("applicationName"));

         ApplicationPanel.get().add(manager);

         ApplicationPanel.get().add(new KSFooter());

         HistoryManager.bind(manager, locations);

         BreadcrumbManager.bind(manager);

         HistoryManager.processWindowLocation();

         if(manager.getCurrentView() == null)

             manager.showDefaultView(Controller.NO_OP_CALLBACK);

         header.setHeaderTitle(Application.getApplicationContext().getMessage("applicationTitleLabel"));

     }

     private void loadMessages(final ApplicationContext context) throws SerializationException {

         MessageList commonMessageList =  getMsgSerializedObject("commonMessages" );

         MessageList lumMessageList =  getMsgSerializedObject("luMessages" );

         context.addMessages(commonMessageList.getMessages());

         context.addMessages(lumMessageList.getMessages());

     }

     @SuppressWarnings("unchecked")

     public  <T> T getMsgSerializedObject(String key ) throws SerializationException

     {

         String serialized = BrowserUtils.getString( key );

         SerializationStreamFactory ssf = GWT.create( MessagesRpcService.class); // magic

         SerializationStreamReader ssr = ssf.createStreamReader( serialized );

         T ret = (T)ssr.readObject();

         return ret;

     } 

     public void loadApp(final ApplicationContext context){

         SecurityRpcServiceAsync securityRpc = GWT.create(SecurityRpcService.class);

         securityRpc.getPrincipalUsername(new KSAsyncCallback<String>(){

             public void handleFailure(Throwable caught) {

                 context.setUserId("Unknown");

                 initScreen();

             }

             @Override

             public void onSuccess(String principalId) {

                 context.setUserId(principalId);

                 initScreen();

             }            

         });

     }

 }