package jalview.javascript;

import java.util.ArrayList;
import java.util.Enumeration;

import jalview.appletgui.AlignFrame;
import jalview.appletgui.AlignViewport;
import jalview.bin.JalviewLite;
import jalview.datamodel.ColumnSelection;
import jalview.datamodel.SequenceGroup;
import jalview.structure.SelectionSource;
import netscape.javascript.JSObject;

public class JsSelectionSender implements
        jalview.structure.SelectionListener, JsCallBack
{
  JalviewLite jvlite;

  AlignFrame _af;

  String _listener;

  public JsSelectionSender(JalviewLite jvlite, AlignFrame af,
          String listener)
  {
    this.jvlite = jvlite;
    _af = af;
    _listener = listener;
  }

  @Override
  public void selection(SequenceGroup seqsel, ColumnSelection colsel,
          SelectionSource source)
  {
    // System.err.println("Testing selection event relay to jsfunction:"+_listener);
    try
    {
      String setid = "";
      String viewid = "";
      AlignFrame src = _af;
      // filter events if necessary
      if (source instanceof AlignViewport)
      {
        if (_af != null
                && !_af.alignPanel.av.getSequenceSetId().equals(
                        ((AlignViewport) source).getSequenceSetId()))
        {
          return;
        }
        jalview.appletgui.AlignmentPanel[] aps = jalview.appletgui.PaintRefresher
                .getAssociatedPanels(setid = ((AlignViewport) source)
                        .getSequenceSetId());
        for (int a = 0; a < aps.length; a++)
        {
          if (aps[a].av == source)
          {
            src = aps[a].alignFrame;
          }
        }
      }
      else
      {
        // unhandled!
        System.err.println("Unhandled selection source !");
        return;
      }
      JSObject jsoWindow = JSObject.getWindow(jvlite);
      String[] seqs = new String[]
      {};
      String[] cols = new String[]
      {};
      int strt = 0, end = src.alignPanel.av.getAlignment().getWidth();
      if (seqsel != null && seqsel.getSize() > 0)
      {
        seqs = new String[seqsel.getSize()];
        for (int i = 0; i < seqs.length; i++)
        {
          seqs[i] = seqsel.getSequenceAt(i).getName();
        }
        if (strt < seqsel.getStartRes())
        {
          strt = seqsel.getStartRes();
        }
        if (end > seqsel.getEndRes())
        {
          end = seqsel.getEndRes();
        }
      }
      if (colsel != null && colsel.size() > 0)
      {
        cols = new String[colsel.getSelected().size()];
        int d = 0, r = -1;
        for (int i = 0; i < cols.length; i++)
        {
          cols[i] = ""+(1+((Integer)colsel.getSelected().elementAt(i)).intValue());
        }
      }
      else
      {
        if (seqsel != null && seqsel.getSize() > 0)
        {
          // send a valid range, otherwise we send the empty selection
          cols = new String[2];
          cols[0] = "" + (1 + strt) + "-" + (1 + end);
        }
        ;

      }
      System.err.println("Relaying selection to jsfunction:" + _listener);
      jsoWindow.call(
              _listener,
              new Object[]
              { src, setid, jvlite.arrayToSeparatorList(seqs),
                  jvlite.arrayToSeparatorList(cols) });
    } catch (Exception ex)
    {
      System.err
              .println("Jalview Javascript exec error: Couldn't send selection message using function '"
                      + _listener + "'");
      if (ex instanceof netscape.javascript.JSException)
      {
        System.err.println("Javascript Exception: "+((netscape.javascript.JSException)ex).getMessage());
      }
      else {
        ex.printStackTrace();
      };
    }
  }

  @Override
  public AlignFrame getAlignFrame()
  {
    return _af;
  }

  @Override
  public String getListenerFunction()
  {
    return _listener;
  }

}