package org.kuali.student.common.ui.server.screenreport.jasper;

 import java.io.ByteArrayOutputStream;

 import java.io.FileNotFoundException;

 import java.io.IOException;

 import java.io.InputStream;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import java.util.Properties;

 import net.sf.jasperreports.engine.JRException;

 import net.sf.jasperreports.engine.JRExporterParameter;

 import net.sf.jasperreports.engine.JasperCompileManager;

 import net.sf.jasperreports.engine.JasperExportManager;

 import net.sf.jasperreports.engine.JasperFillManager;

 import net.sf.jasperreports.engine.JasperPrint;

 import net.sf.jasperreports.engine.JasperReport;

 import net.sf.jasperreports.engine.export.JRXlsExporter;

 import net.sf.jasperreports.engine.export.JRXlsExporterParameter;

 import net.sf.jasperreports.engine.export.ooxml.JRDocxExporter;

 import org.apache.log4j.Logger;

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

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

 import org.kuali.student.common.ui.server.messages.MessageRPCPreloader;

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

 /**

  * This is a Jasper implimentation of the ScreenReportProcessor to generate documents in pdf, doc etc using the Jasper

  * library.

  * 

  * @author Kuali Rice Team (kuali-rice@googlegroups.com)

  */

 public class JasperScreenReportProcessorImpl implements ScreenReportProcessor {

     final Logger LOG = Logger.getLogger(MessageRPCPreloader.class);

     private static final String PROPERTIES_FILE = "jasper.properties";

     private static Properties jasperProperties = new Properties();

     public JasperScreenReportProcessorImpl() {

         super();

         try {

             InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream(PROPERTIES_FILE);

             jasperProperties.load(inputStream);

         } catch (FileNotFoundException e) {

             LOG.error(e);

         } catch (IOException e) {

             LOG.error(e);

         }

     }

     @Override

     public byte[] createPdf(Data source, String template, String reportTitle) {

         try {

             JasperPrint jprint = this.prepare(template, reportTitle, source, null);

             return exportPdf(jprint);

         } catch (JRException e) {

             LOG.error(e);

             return null;

         }

     }

     @Override

     public byte[] createPdf(List<ExportElement> source, String template, String reportTitle) {

         try {

             JasperPrint jprint = this.prepare(template, reportTitle, null, source);

             return exportPdf(jprint);

         } catch (JRException e) {

             LOG.error(e);

             return null;

         }

     }

     /**

      * This method exports a jasperprint object to pdf format.

      * 

      * @param jprint

      * @return

      * @throws JRException

      */

     private byte[] exportPdf(JasperPrint jprint) throws JRException {

         return JasperExportManager.exportReportToPdf(jprint);

     }

     @Override

     public byte[] createXls(Data source, String template, String reportTitle) {

         try {

             JasperPrint jprint = this.prepare(template, reportTitle, source, null);

             return exportXls(jprint);

         } catch (JRException e) {

             LOG.error(e);

             return null;

         }

     }

     @Override

     public byte[] createXls(List<ExportElement> source, String template, String reportTitle) {

         try {

             JasperPrint jprint = this.prepare(template, reportTitle, null, source);

             return exportXls(jprint);

         } catch (JRException e) {

             LOG.error(e);

             return null;

         }

     }

     /**

      * This method exports a jasperprint object to excel format.

      * 

      * @param jprint

      * @return

      * @throws JRException

      */

     private byte[] exportXls(JasperPrint jprint) throws JRException {

         ByteArrayOutputStream baos = new ByteArrayOutputStream();

         JRXlsExporter exporter = new JRXlsExporter();

         exporter.setParameter(JRExporterParameter.JASPER_PRINT, jprint);

         exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos);

         exporter.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET, Boolean.FALSE);

         exporter.exportReport();

         return baos.toByteArray();

     }

     @Override

     public String createXml(Data source, String template, String reportTitle) {

         try {

             JasperPrint jprint = prepare(template, reportTitle, source, null);

             return JasperExportManager.exportReportToXml(jprint);

         } catch (JRException e) {

             LOG.error(e);

             return null;

         }

     }

     @Override

     public byte[] createDoc(Data source, String template, String reportTitle) {

         try {

             JasperPrint jprint = prepare(template, reportTitle, source, null);

             return exportDoc(jprint, template);

         } catch (JRException e) {

             LOG.error(e);

             return null;

         }

     }

     @Override

     public byte[] createDoc(List<ExportElement> source, String template, String reportTitle) {

         try {

             JasperPrint jprint = prepare(template, reportTitle, null, source);

             return exportDoc(jprint, template);

         } catch (JRException e) {

             LOG.error(e);

             return null;

         }

     }

     /**

      * This method exports a jasperprint object to a doc format document.

      * 

      * @param jprint

      * @param template

      * @return

      */

     private byte[] exportDoc(JasperPrint jprint, String template) {

         ByteArrayOutputStream baos = new ByteArrayOutputStream();

         try {

             JRDocxExporter exporter = new JRDocxExporter();

             exporter.setParameter(JRExporterParameter.JASPER_PRINT, jprint);

             exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos);

             exporter.exportReport();

         } catch (JRException e) {

             LOG.error(e);

         }

         return baos.toByteArray();

     }

     /**

      * Compile and generate the report from the template files and datamodel from the UI.

      */

     @SuppressWarnings("unchecked")

     private JasperPrint prepare(String template, String reportTitle, Data dataMap, List<ExportElement> dataList) throws JRException {

         // Compile base report

         String templateLocation = (String) jasperProperties.get(template);

         InputStream is = this.getClass().getClassLoader().getResourceAsStream(templateLocation);

         JasperReport jreport = JasperCompileManager.compileReport(is);

         // Preparing parameters

         Map parameters = new HashMap();

         parameters.put("ReportTitle", reportTitle);

         // Add Subreport

         String subreportLocation = (String) jasperProperties.get(template + ".subreport");

         if (subreportLocation != null) {

             InputStream subis = this.getClass().getClassLoader().getResourceAsStream(subreportLocation);

             JasperReport subreport = JasperCompileManager.compileReport(subis);

             parameters.put("SubReport", subreport);

         }

         // Fill the report with the data from the UI.

         JasperPrint jprint;

         if (dataMap != null) {

             jprint = JasperFillManager.fillReport(jreport, parameters, new KSCustomDataSource(dataMap.iterator()));

         } else {

             jprint = JasperFillManager.fillReport(jreport, parameters, new KSCollectionDataSource(dataList));

         }

         return jprint;

     }

 }