package jas2.jds.module;

import jas2.util.*;
import java.util.*;

import hepjas.analysis.*;

import java.awt.BorderLayout;
import javax.swing.JOptionPane;
import javax.swing.filechooser.FileFilter;

/**
 * An abstract implementation of LocalDIM2 suitable for DIM's which
 * simply want to open a single file of a particular type
 * @see MultiFileLocalDIM
 */

public abstract class BasicLocalDIM implements LocalDIM2
{
	/**
	 * Create a BasicLocalDIM. 
	 * 
	 * Specify a FileFilter that describes the type of files you want
	 * to open.
	 */
	public BasicLocalDIM(FileFilter f)
	{
		this.fileFilter = f;
	}
	/**
	 * Create a BasicLocalDIM.
	 * 
	 * Specify a description of the files, and a filetype (e.g. .hbook)
	 * @param description Description of the files
	 * @param filetype The file type 
	 */

	public BasicLocalDIM(String description, String filetype)
	{
		this(new BasicFileFilter(description,filetype));
	}
	public JASWizardPage getSetupPage()
	{
		return new BasicWizardPage();
	}
	public void setLocalJobBuilder(LocalJobBuilder ljb)
	{
		m_ljb = ljb;
	}
	public FileFilter getFileFilter()
	{
		return fileFilter;
	}

	/**
	 * Override to provide your own description of the filetype in the
	 * LocalJobWizard page. By default uses the description from the file
	 * filter.
	 */

	public String toString()
	{
		return fileFilter.getDescription();
	}
	/**
	 * Override to provide your own help topic
	 */
	public String getHelpTopic()
	{
		return "builtInModules.BasicLocalDIM";
	}
	class BasicWizardPage extends JASWizardPage implements Finishable, HasHelpPage
	{
		BasicWizardPage()
		{
			super(new BorderLayout());

			m_filePanel = new OpenLocalFilePanel(false,false,BasicLocalDIM.this.getClass().getName(),fileFilter);
			add(BorderLayout.NORTH, m_filePanel);
		}
		public void onFinish()
		{
			String fileName = m_filePanel.getText();
			if (fileName.length() == 0)
			{
				JOptionPane.showMessageDialog(this, "You must enter a file name.",
					"Error...", JOptionPane.ERROR_MESSAGE);
				return; // dispose not called, so wizard stays open
			}
			m_ljb.createJob(fileName);
			m_filePanel.saveState(); // only if successfully opened file
			dispose();
		}
		public String getHelpTopic()
		{
			return BasicLocalDIM.this.getHelpTopic();
		}
		OpenLocalFilePanel m_filePanel;
	}
	private static class BasicFileFilter extends FileFilter
	{
		BasicFileFilter(String description, String filetype)
		{
			this.description = description;
			this.filetype = filetype;
		}
		public boolean accept(java.io.File f)
		{
			return f.isDirectory() || f.getName().endsWith(filetype);
		}
		public String getDescription()
		{
			return description;
		}
		private String description;
		private String filetype;
	}

	private FileFilter fileFilter;
	transient LocalJobBuilder m_ljb;
}