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 ReportImportXML extends Report {
    
    public String xmlFile = "input.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 {
		
			println("starting import from XML");
			
	        Gedcom gedcom = (Gedcom) context;

		  	// if XSL is specified, transfrom to intermediate XML first
			if (xslFile != null) {
			
				println("doing XSL transform ...");
				
				doXSLTransform(intermediateXmlFile,xmlFile,xslFile);
				
				println("XSL transform done");
			}
			
			String inputFile = xmlFile;
			if (xslFile != null) inputFile = intermediateXmlFile;
			
			println("reading XML file ...");

			File file = new File(inputFile);
			URL url = file.toURL(); 
			    
			GedcomDOMReader gdr = new GedcomDOMReader(Origin.create(url));
			    
			gdr.setGedcom(gedcom);
			
			println("parsing XML file ...");
			
			context = gdr.read();
			
			println("done with XML import");
			
			/*
			FileOutputStream fops = new FileOutputStream(gedFile);
		
			GedcomWriter writer = new GedcomWriter(gedcom, gedFile, "LATIN1", fops);
			
			writer.writeGedcom();
			
			fops.close();
			*/
		
		}
		catch (Exception e) {
			println(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)));
		
	}


}