/**

  * 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.common.ui.server.gwt;

 import java.util.List;

 import java.util.UUID;

 import org.apache.log4j.Logger;

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

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

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

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

 import org.kuali.student.common.ui.server.screenreport.ScreenReportProcessor;

 import com.google.gwt.user.server.rpc.RemoteServiceServlet;

 @SuppressWarnings("serial")

 public class ExportGwtRpcServlet extends RemoteServiceServlet implements GwtExportRpcService {

     final Logger logger = Logger.getLogger(ExportGwtRpcServlet.class);

     private ScreenReportProcessor reportProcessor;

     public ScreenReportProcessor getReportProcessor() {

         return reportProcessor;

     }

     public void setReportProcessor(ScreenReportProcessor reportProcessor) {

         this.reportProcessor = reportProcessor;

     }

     @Override

     public String reportExport(List<ExportElement> exportElements, Data root, String templateName, String exportFormat, String reportTitle) {

         String exportId = null;

         boolean exportBasedOnView = true; // TODO Nina do we want this as a system Property??

         try {

             // If templateName is null, then default to default Template ie base.template

             if (templateName == null) {

                 templateName = "base.template";

             }

             logger.info("Template Name = " + templateName + " For format = " + exportFormat);

             byte[] exportOutput = null;

             if (exportBasedOnView) {

                 exportOutput = exportBasedOnView(exportElements, templateName, exportFormat, reportTitle);

             } else {

                 exportOutput = exportBasedOnDataModel(root, templateName, exportFormat, reportTitle);

             }

             exportId = this.getExportId();

             logger.info("Export succesful - Export ID = " + exportId);

             getThreadLocalRequest().getSession(true).setAttribute(exportId, exportOutput);

         } catch (RuntimeException e) {

             e.printStackTrace();

             throw e;

         }

         return exportId;

     }

     private byte[] exportBasedOnDataModel(Data root, String templateName, String exportFormat, String reportTitle) {

         byte[] exportOutput = null;

         if (exportFormat.equals(ExportUtils.PDF)) {

             exportOutput = reportProcessor.createPdf(root, templateName, reportTitle);

         } else if (exportFormat.equals(ExportUtils.DOC)) {

             exportOutput = reportProcessor.createDoc(root, templateName, reportTitle);

         } else if (exportFormat.equals(ExportUtils.XLS)) {

             exportOutput = reportProcessor.createXls(root, templateName, reportTitle);

         }

         return exportOutput;

     }

     private byte[] exportBasedOnView(List<ExportElement> exportElements, String templateName, String exportFormat, String reportTitle) {

         byte[] exportOutput = null;

         if (exportFormat.equals(ExportUtils.PDF)) {

             exportOutput = reportProcessor.createPdf(exportElements, templateName, reportTitle);

         } else if (exportFormat.equals(ExportUtils.DOC)) {

             exportOutput = reportProcessor.createDoc(exportElements, templateName, reportTitle);

         } else if (exportFormat.equals(ExportUtils.XLS)) {

             exportOutput = reportProcessor.createXls(exportElements, templateName, reportTitle);

         }

         return exportOutput;

     }

     private String getExportId() {

         return UUID.randomUUID().toString();

     }

 }