package org.sonar.report.pdf;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.URL;
import java.util.Iterator;
import java.util.Properties;

import org.apache.commons.httpclient.HttpException;
import org.sonar.report.pdf.entity.ComplexityDistribution;
import org.sonar.report.pdf.entity.Measures;
import org.sonar.report.pdf.entity.Project;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Image;
import com.lowagie.text.PageSize;
import com.lowagie.text.pdf.PdfWriter;

/**
 * This is the superclass of concrete reporters. It provides the access to Sonar data 
 * (project, measures, graphics) and report config data.
 * 
 * The concrete reporter class will provide: sonar base URL, logo (it will be used 
 * in yhe PDF document), the project key and the implementation of printPdfBody method.
 */
public abstract class PDFReporter {

    private Properties properties;

    public ByteArrayOutputStream getReport() throws DocumentException, IOException, org.dom4j.DocumentException {
        Document document = new Document(PageSize.A4, 50, 50, 110, 50);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        PdfWriter writer = PdfWriter.getInstance(document, baos);
        writer.setPageEvent(new LogoHeader(this.getLogo(), this.getProject()));
        document.open();
        this.printPdfBody(document);
        document.close();
        return baos;
    }

    public Project getProject() throws HttpException, IOException, org.dom4j.DocumentException {
        Project project = Project.parse(getSonarUrl() + "/api/projects/" + getProjectKey()
                + "?includelinks=true&format=xml&includechildren=true");

        project.setMeasures(getMeasures(project.getKey()));
        Iterator<Project> it = project.getSubprojects().iterator();
        while (it.hasNext()) {
            Project subproject = it.next();
            subproject.setMeasures(getMeasures(subproject.getKey()));
        }
        return project;
    }

    private Measures getMeasures(String projectKey) throws HttpException, IOException, org.dom4j.DocumentException {
        Measures measures = Measures.parse(getSonarUrl() + "/api/projects/" + projectKey
                + "/measures?includeparams=true&format=xml");
        return measures;
    }

    // TODO: add xradar graphic (need ISO9126 measures for this, SONAR-563).
    public void getRadarGraphic() {
        
        // RadarGraphic graphics = new RadarGraphic(); 
        // Image imageRadar = graphics.getGraphic(null, null);
         
    }

    public Image getCCNDistribution(Project project) {
        String data = project.getMeasureValue("ccn_classes_count_distribution");
        ComplexityDistribution ccnDist = new ComplexityDistribution(data, getSonarUrl());
        return ccnDist.getGraphic();
    }

    public String getTextProperty(String key) throws IOException {
        if (properties == null) {
            properties = new Properties();
            URL resource = this.getClass().getClassLoader().getResource("report-texts-en.properties");
            properties.load(new FileInputStream(resource.getFile()));
        }
        return properties.getProperty(key);
    }

    protected abstract String getSonarUrl();

    protected abstract void printPdfBody(Document document) throws DocumentException, IOException,
            org.dom4j.DocumentException;

    protected abstract URL getLogo();

    protected abstract String getProjectKey();

}