import genj.gedcom.Gedcom; 
import genj.io.GedcomReader; 
import genj.io.GedcomWriter; 
import genj.util.Origin; 

import java.net.URL; 
import java.io.*;

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

import genj.report.Report;

public class ReportExportXML extends Report {
    
    public String xmlFile = "output.xml";
    public String xslFile = null; 
    public String intermediateXmlFile = null;
        
    public static final String VERSION = "0.1";
    
    public String getVersion() {
        return VERSION;
    }
    
    /**
     * Author
     */
    public String getAuthor() {
        return "Werner Bailer";
    }
    
    /** Returns the name of this report - should be localized.
     */
    public String getName() {
        return i18n("name");
    }
    
    /**
     * Some information about this report
     * @return Information as String
     */
    public String getInfo() {
        return i18n("info");
    }
    
    /**
     * @see genj.report.Report#accepts(java.lang.Object)
     */
    public String accepts(Object context) {
        // we accept GEDCOM
        return context instanceof Gedcom ? getName() : null;
    }
    
    /**
     * This method actually starts this report
     */
    public void start(Object context) {
    
    	try {
		   	// convert GEDCOM file to intermediate XML	
			
			println("converting to XML ... ");
			
	        Gedcom gedcom = (Gedcom) context;

			
			String outputFile = xmlFile;
			if (xslFile != null) outputFile = intermediateXmlFile;
			
			FileOutputStream fops = new FileOutputStream(outputFile);
			    
			GedcomDOMWriter gdw = new GedcomDOMWriter(gedcom,"","",fops);
			    
			gdw.writeGedcom();
			    
			fops.close();
			
			println("XML file has been written ... ");
			
			// transform intermediate XML using XSLT
			if (xslFile != null) {
				println("XSL transform ... ");
			
				doXSLTransform(intermediateXmlFile,xmlFile,xslFile);
				
				println("XSL transform done");
			}
			
			println("XML Export done");
		}
		catch (Exception e) {
			println("ERROR: "+e.getMessage());
		}
       
    }
    

	protected static void doXSLTransform(String xmlin, String xmlout, String xsl)
	    throws TransformerException, TransformerConfigurationException, 
	           FileNotFoundException, IOException
	{  
		TransformerFactory tFactory = TransformerFactory.newInstance();
		
		Transformer transformer = tFactory.newTransformer(new StreamSource(xsl));
	
		transformer.transform(new StreamSource(new FileInputStream(xmlin)), new StreamResult(new FileOutputStream(xmlout)));
		
	}


}