/*
 * Jalview - A Sequence Alignment Editor and Viewer
 * Copyright (C) 2005 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

//////////////////////////////////////////////////////////////////
package jalview.io;

import java.io.*;
import java.awt.*;
import javax.swing.*;

public class JalviewFileChooser
    extends JFileChooser
{

  public JalviewFileChooser(String dir)
  {
    super(dir);
  }

  public JalviewFileChooser(String dir, String[] suffix, String[] desc,
                            String selected)
  {
    super(dir);

    JalviewFileFilter chosen = null;

    for (int i = 0; i < suffix.length; i++)
    {
      JalviewFileFilter jvf = new JalviewFileFilter(suffix[i], desc[i]);
      addChoosableFileFilter(jvf);

      if ( (selected != null) && selected.equalsIgnoreCase(desc[i]))
      {
        chosen = jvf;
      }
    }

    if (chosen != null)
    {
      setFileFilter(chosen);
    }
  }

  public void setFileFilter(javax.swing.filechooser.FileFilter filter)
  {
    super.setFileFilter(filter);

    try{
      if(getUI() instanceof javax.swing.plaf.basic.BasicFileChooserUI)
      {
        final javax.swing.plaf.basic.BasicFileChooserUI ui = (javax.swing.plaf.
            basic.BasicFileChooserUI) getUI();
        final String name = ui.getFileName().trim();

        if ( (name == null) || (name.length() == 0))
        {
          return;
        }

        EventQueue.invokeLater(new Thread()
        {
          public void run()
          {
            String currentName = ui.getFileName();
            if ( (currentName == null) || (currentName.length() == 0))
            {
              ui.setFileName(name);
            }
          }
        });
      }
    }catch(Exception ex)
    {
      // Some platforms do not have BasicFileChooserUI
    }
  }


  public String getSelectedFormat()
  {
    if(getFileFilter()==null)
    {
      return null;
    }

    String format = getFileFilter().getDescription();

    if (format.toUpperCase().startsWith("JALVIEW"))
    {
      format = "Jalview";
    }
    else if (format.toUpperCase().startsWith("FASTA"))
    {
      format = "FASTA";
    }
    else if (format.toUpperCase().startsWith("MSF"))
    {
      format = "MSF";
    }
    else if (format.toUpperCase().startsWith("CLUSTAL"))
    {
      format = "CLUSTAL";
    }
    else if (format.toUpperCase().startsWith("BLC"))
    {
      format = "BLC";
    }
    else if (format.toUpperCase().startsWith("PIR"))
    {
      format = "PIR";
    }
    else if (format.toUpperCase().startsWith("PFAM"))
    {
      format = "PFAM";
    }

    return format;
  }

  public int showSaveDialog(Component parent)
      throws HeadlessException
  {
    setDialogType(SAVE_DIALOG);

    int ret = showDialog(parent, null);

    if (getFileFilter() instanceof JalviewFileFilter)
    {
      JalviewFileFilter jvf = (JalviewFileFilter) getFileFilter();

      if (!jvf.accept(getSelectedFile()))
      {
        String withExtension = getSelectedFile() + "." +
            jvf.getAcceptableExtension();
        setSelectedFile(new File(withExtension));
      }
    }

    if ( (ret == JalviewFileChooser.APPROVE_OPTION) &&
        getSelectedFile().exists())
    {
      int confirm = JOptionPane.showConfirmDialog(parent,
                                                  "Overwrite existing file?",
                                                  "File exists",
                                                  JOptionPane.YES_NO_OPTION);

      if (confirm != JOptionPane.YES_OPTION)
      {
        ret = this.CANCEL_OPTION;
      }
    }

    return ret;
  }
}