package eu.smartlm.abs.portal.view;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Set;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.lowagie.text.Chunk;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Font;
import com.lowagie.text.Image;
import com.lowagie.text.PageSize;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.draw.VerticalPositionMark;

import eu.smartlm.abs.portal.util.StringUtil;
import eu.smartlm.abs.portal.view.event.EventData;
import eu.smartlm.abs.portal.view.portlet.QueryPortlet;
import eu.smartlm.schemas.x2009.x06.urec.LicenseResourceType;
import eu.smartlm.schemas.x2009.x06.urec.SmartLMUsageRecordType;

/**
 * Servlet that creates the PDF output of the accounting or billing query
 * @author David García Pérez - CESGA
 *
 */
public class PDFOutput extends HttpServlet {
	private static final long serialVersionUID = 8806162452520858258L; 
	
	private static final Font BOLD_16 = new Font(Font.HELVETICA, 16, Font.BOLD);
	private static final Font BOLD_12 = new Font(Font.HELVETICA, 12, Font.BOLD);
	private static final Font BOLD_10 = new Font(Font.HELVETICA, 8, Font.BOLD);
	private static final Font NORMAL_10 = new Font(Font.HELVETICA, 8, Font.NORMAL);

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// Get Data to create the PDF
		HttpSession session = request.getSession();
		EventData data = (EventData) session.getAttribute("eventpdf");
		
		// Setting the type of data
		String type = "";
		if(data.getType().equals(QueryPortlet.TYPE_ACCOUNTING))
			type = "Accounting";
		else if (data.getType().equals(QueryPortlet.TYPE_BILLING))
			type = "Billing";
		
		try { 
				
			// Creation of the document
			Document document = new Document(PageSize.A4/*.rotate()*/); 
			ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
			PdfWriter.getInstance(document, baos);
			document.open(); 
		
			// HEADER
			document.add(new Paragraph(type + " Results", BOLD_16));
			//document.add(new LineSeparator(1, 100, null, Element.ALIGN_CENTER, -2));
			
			
			// QUERY PART
			document.add(Chunk.NEWLINE);
			document.add(new Paragraph("Query:", BOLD_12));
			
			document.add(Chunk.NEWLINE);
			
			//ADD IMAGE:
			document.add(Image.getInstance((java.awt.Image) data.getGraph().createBufferedImage(400, 400), null));
			
			// USAGE RECORDS:
			addUsageRecordsToDocument(document, data);
			
			// Document ready... 
			document.close();   

			// setting some response headers 
			response.setHeader("Expires", "0"); 
			response.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0"); 
			response.setHeader("Pragma", "public"); 
			// setting the content type 
			response.setContentType("application/pdf"); 
			// the contentlength 
			response.setContentLength(baos.size()); 
			// write ByteArrayOutputStream to the ServletOutputStream 
			OutputStream os = response.getOutputStream(); 
			baos.writeTo(os); 
			os.flush(); 
			os.close(); 
		} 
		catch(DocumentException e) { 
			throw new IOException(e.getMessage()); 
		}
	}
	
	private void addUsageRecordsToDocument(Document document, EventData eventData) throws DocumentException {
		// Format options...
		Chunk tab1 = new Chunk(new VerticalPositionMark(), 60, true);
		Chunk tab2 = new Chunk(new VerticalPositionMark(), 160, true);
		Chunk tab3 = new Chunk(new VerticalPositionMark(), 300, true);
		Chunk tab4 = new Chunk(new VerticalPositionMark(), 430, true);
		//Chunk tab5 = new Chunk(new VerticalPositionMark(), 610, true);
		//Chunk tab6 = new Chunk(new VerticalPositionMark(), 660, true);
		//Chunk tab7 = new Chunk(new VerticalPositionMark(), 710, true);
		//Chunk tab8 = new Chunk(new VerticalPositionMark(), 760, true);
		
		// Table of results:
		Paragraph line1 = new Paragraph();
		line1.add(new Chunk("Users:", BOLD_10));
		line1.add(tab1);
		line1.add(new Chunk("Product:", BOLD_10));
		line1.add(tab2);
		line1.add(new Chunk("Start Date:", BOLD_10));
		line1.add(tab3);
		line1.add(new Chunk("End Date:", BOLD_10));
		line1.add(tab4);
		line1.add(new Chunk("Accounting Group:", BOLD_10));
	//	line1.add(tab5);
	//	line1.add(new Chunk("Project:", BOLD_10));
	//	line1.add(tab6);
	//	line1.add(new Chunk("Host:", BOLD_10));
	//	line1.add(tab7);
	//	line1.add(new Chunk("SubmitHost:", BOLD_10));
		document.add(line1);
		
		// We retrieve the usage  records
		Set<SmartLMUsageRecordType> usageRecords = eventData.getUsageRecords();
		
		
		for(SmartLMUsageRecordType usageRecord: usageRecords) {
			String user = StringUtil.removeSpaces(usageRecord.getUserIdentityArray(0).getLocalUserId()); 
			//String host = usageRecord.getHostArray(0).getStringValue();
			//String submitHost = usageRecord.getSubmitHostArray(0).getStringValue();
			//String project = usageRecord.getProjectNameArray(0).getStringValue();
			
			LicenseResourceType[] licenseResources = usageRecord.getLicenseResourceArray();
			
			for(int i = 0; i < licenseResources.length; i++) {
				LicenseResourceType licenseResource = licenseResources[i];
				String product = StringUtil.removeSpaces(licenseResource.getLicense().getProduct().getName());
				String accountingGroup = StringUtil.removeSpaces(licenseResource.getAccountingGroup());
				String start = StringUtil.removeSpaces(licenseResource.getAccountingPeriod().getStartTime().toString());
				String end = StringUtil.removeSpaces(licenseResource.getAccountingPeriod().getEndTime().toString());
				
				Paragraph line = new Paragraph();
				line.add(new Chunk(user, NORMAL_10));
				line.add(tab1);
				line.add(new Chunk(product, NORMAL_10));
				line.add(tab2);
				line.add(new Chunk(start, NORMAL_10));
				line.add(tab3);
				line.add(new Chunk(end, NORMAL_10));
				line.add(tab4);
				line.add(new Chunk(accountingGroup, NORMAL_10));
				//line.add(tab5);
				//line.add(new Chunk(project, NORMAL_10));
				//line.add(tab6);
				//line.add(new Chunk(host, NORMAL_10));
				//line.add(tab7);
				//line.add(new Chunk(submitHost, NORMAL_10));
				document.add(line);
			}
		}
	}
}