import java.util.logging.Logger;
import java.io.PrintWriter;

import vo.parameter.*;

public final class XmlSerializer
{
   private static final Logger LOGGER = Logger.getLogger("XmlSerializer");

   private XmlSerializer() {} // disables instatiation


   public static void serializeToLegacyCutResults(PrintWriter writer, String charEncoding, DataLink dataLink,
         boolean showDuration, long startTime_msec)
   {
      LOGGER.info("trace");

      writer.println("<?xml version=\"1.0\" encoding=\"" + charEncoding + "\" standalone=\"yes\"?>");
      writer.println("<results>");
      writer.println("<description> " + dataLink.description + " </description>");
      serialize(writer, dataLink.inputs);

      if(dataLink.cut != null)
         writer.println("<CUT> " + dataLink.cut + " </CUT>");
      if(dataLink.accessUrl != null) 
      {
         writer.println("<URL> " + dataLink.accessUrl + " </URL>");
         writer.println("<cutoutSize> " + dataLink.contentLength + " </cutoutSize>");
      }
      if(dataLink.nullVals != null)
         writer.println(serialize(dataLink.nullVals ));
 
      writer.println("<msg> " + dataLink.versionString + " </msg>");
 
      writer.println("<DatacubeCount> " + dataLink.datacubeCount + " </DatacubeCount>");

      if(showDuration)
         writer.println("<duration unit=\"msec\">"+(System.currentTimeMillis() - startTime_msec)+"</duration>");

      writer.println("</results>");
  }


  public static void serializeToLegacyCutResult(PrintWriter writer, String charEncoding,
        CutResult cutResult, String accessUrl,
        String id, Pos pos, Band band, Time time, Pol pol, String pixels, boolean countNullValues,
         boolean showDuration, long startTime_msec)
  {
     LOGGER.info("trace serialize for accessUrl: " + ((accessUrl==null)? "null":accessUrl));

     writer.println("<?xml version=\"1.0\" encoding=\"" + charEncoding + "\" standalone=\"yes\"?>");
     writer.println("<results>");
     writer.println("<description> SODA cutout from: " + (id==null?"null":id) + " </description>");

     Coord coord   = new Coord(pos, band, time, pol, pixels);// pixels-input
     Inputs inputs = new Inputs(id, coord, countNullValues);

     serialize(writer, inputs);

     // pixels-output
     if(cutResult.pixels != null)
        writer.println("<CUT> " + cutResult.pixels + " </CUT>");

     if(accessUrl != null) 
     {
        writer.println("<URL> " + accessUrl + " </URL>");
        writer.println("<cutoutSize> " + cutResult.fileSize + " </cutoutSize>");
     }

     if(cutResult.nullValueCount != null)
        writer.println(serialize(cutResult.nullValueCount ));

     writer.println("<msg> " + Version.asString + " </msg>");

     writer.println("<DatacubeCount> 1 </DatacubeCount>");

     if(showDuration)
        writer.println("<duration unit=\"msec\">"+(System.currentTimeMillis() - startTime_msec)+"</duration>");

     writer.println("</results>");
  }




  public static String serialize(NullValueCount nullVals)
  {
     StringBuilder xml = new StringBuilder();
     xml.append("<nullValues>");
     xml.append("<description> Undefined pixel count </description>");
     xml.append("<percent>"    + nullVals.percent + "</percent>");
     xml.append("<pixels>");
     xml.append("<nullcount>"  + nullVals.nullCount + "</nullcount>");
     xml.append("<totalcount>" + nullVals.totalCount + "</totalcount>");
     xml.append("</pixels>");
     xml.append("</nullValues>");
     return xml.toString();
  }

  public static String serialize(Coord coord)
  {
     StringBuilder xml = new StringBuilder();
     xml.append("<SkySystem>"+coord.skySystem+"</SkySystem>");

     /* reconstruct VLKB-legacy param values from SODA-params */

     if(coord.shape != null)
     {
        switch(coord.shape)
        {
           case "CIRCLE" :
              xml.append("<l>"+coord.pos.circle.lon+"</l>");
              xml.append("<b>"+coord.pos.circle.lat+"</b>");
              xml.append("<r>"+coord.pos.circle.radius+"</r>");
              break;
           case "RECT"   :
              xml.append("<l>"  + String.valueOf((coord.pos.range.lon1 + coord.pos.range.lon2)/2.0) + "</l>");
              xml.append("<b>"  + String.valueOf((coord.pos.range.lat1 + coord.pos.range.lat2)/2.0) + "</b>");
              xml.append("<dl>" + String.valueOf(coord.pos.range.lon2 - coord.pos.range.lon1) + "</dl>");
              xml.append("<db>" + String.valueOf(coord.pos.range.lat2 - coord.pos.range.lat1) + "</db>");
              break;
           default:
              xml.append("<shape> unknown shape: "+ coord.shape +" </shape>");
        }
     }

     if(coord.band != null)
     {
        xml.append("<vl>"   + String.valueOf(coord.band.getMin())  +"</vl>");
        xml.append("<vu>"   + String.valueOf(coord.band.getMax())   +"</vu>");
        xml.append("<vtype>" + coord.specSystem + "</vtype>");
     }

     return xml.toString();
  }

  public static String serialize(AuthPolicy auth)
  {
     StringBuilder xml = new StringBuilder();
     xml.append("<AccessPolicy>" + auth.getAccessPolicy() + "</AccessPolicy>");
     String ug = auth.getUserGroupsAsString(" ");
     if(auth.getUserName() != null) xml.append("<UserName>" + auth.getUserName() + "</UserName>");
     if(ug            != null) xml.append("<GroupNames>" + ug + "</GroupNames>");
     return xml.toString();
  }


  public static void serialize(PrintWriter writer, Inputs inputs)
  {
     if(inputs != null)
     {
        writer.println("<input>");
        if(inputs.pubdid      != null) writer.println("<pubdid>"+inputs.pubdid+"</pubdid>");
        if(inputs.coord       != null) writer.println(serialize(inputs.coord));
        if(inputs.countNullValues)     writer.println("<nullvals> set </nullvals>");
        if(inputs.auth        != null) writer.println(serialize(inputs.auth));
        writer.println("</input>");
     }
  }

}