package org.sonar.report.pdf.web;

import com.lowagie.text.DocumentException;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

import java.net.MalformedURLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import java.net.URL;
import java.util.Properties;
import org.sonar.report.pdf.PDFReporter;
import org.sonar.report.pdf.SonarPDFReporter;

public class ReportController extends HttpServlet {

    /**
     * Serial version UID.
     */
    private static final long serialVersionUID = 7345885422328007022L;

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPDFReport(req, resp);
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPDFReport(req, resp);
    }

    private void doPDFReport(HttpServletRequest req, HttpServletResponse resp) {
        String projectKey = req.getParameter("project");
        resp.setContentType("application/pdf;charset=UTF-8");
        resp.setHeader("Expires", "0");
        resp.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0");
        resp.setHeader("Pragma", "public");

        Properties config = new Properties();
        URL resource = this.getClass().getClassLoader().getResource("report.properties");
        try {
            config.load(resource.openStream());
        } catch (IOException ex) {
            Logger.getLogger(ReportController.class.getName()).log(Level.SEVERE, "Can not read report config file", ex);
        }

        
        try {

            String sonarUrl = null;
            if(!config.getProperty("sonar.base.url").equals("")) {
                sonarUrl = config.getProperty("sonar.base.url");
            } else {
                // TODO: retrieve local server base URL
            }

            PDFReporter reporter = new SonarPDFReporter(new URL(sonarUrl + "/images/sonar-120.png"), projectKey, sonarUrl);
            ByteArrayOutputStream baos = reporter.getReport();
            resp.setContentLength(baos.size());
            ServletOutputStream out = resp.getOutputStream();
            baos.writeTo(out);
            out.flush();
        } catch (MalformedURLException ex) {
            Logger.getLogger(ReportController.class.getName()).log(Level.SEVERE, "Sonar base URL is not correct", ex);
        } catch (DocumentException ex) {
            Logger.getLogger(ReportController.class.getName()).log(Level.SEVERE, "Error generating pdf report", ex);
        } catch (IOException ex) {
            Logger.getLogger(ReportController.class.getName()).log(Level.SEVERE, null, ex);
        } catch (org.dom4j.DocumentException ex) {
            Logger.getLogger(ReportController.class.getName()).log(Level.SEVERE, "Error parsing response from Sonar", ex);
        }
    }

}