package Gui;

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

public class RstDlg extends JDialog implements ActionListener{
    
    private JTextField rstField, outField;
    private String rstfile,rtmfile;
    private File   dirCache;
    int buttonHit;
    
    public RstDlg(JFrame frame) {
	
	super(frame);
	
	setTitle("Select results files");
	setLocation(600,500);
	
	// layout
	JPanel p1 = new JPanel();
	JLabel l1= new JLabel("   Result file     ");
	rstField = new JTextField(9);
	JButton b1= new JButton("Browse...");
	b1.setActionCommand("rst");
	b1.addActionListener(this);
	p1.add(l1);
	p1.add(rstField);
	p1.add(b1);
	
	JPanel p2 = new JPanel();
	JLabel l2= new JLabel("Runtime output ");
	outField = new JTextField(9);
	JButton b2= new JButton("Browse...");
	b2.setActionCommand("rtm");
	b2.addActionListener(this);
	p2.add(l2);
	p2.add(outField);
	p2.add(b2);
	
	JButton okButton = new JButton("   OK   ");
	okButton.setActionCommand("ok");
	okButton.addActionListener(this);
	JButton cancelButton = new JButton("  Cancel ");      
	cancelButton.setActionCommand("cancel");
	cancelButton.addActionListener(this);
	JPanel buttonPane = new JPanel();
	buttonPane.add(okButton);
	buttonPane.add(cancelButton);
	
	
	JPanel packPane = new JPanel();
	packPane.setLayout(new GridLayout(0,1));
	packPane.add(p1);
	packPane.add(p2);
	packPane.setPreferredSize(new Dimension(400,80));
	JPanel topPane = new JPanel();
	JLabel l6 = new JLabel(" ");
	topPane.add(l6);
	topPane.setPreferredSize(new Dimension(400,30));
	buttonPane.setPreferredSize(new Dimension(400,50));
	getContentPane().add("North", topPane);
	getContentPane().add("Center",packPane);
	getContentPane().add("South", buttonPane);
	
	setSize(400,160);
	
	addWindowListener(new WindowAdapter() {
		public void windowClosing(WindowEvent e) {
		    buttonHit = JOptionPane.CANCEL_OPTION;
		}
	    });
			  
    }
    public int showDialog(){
	setModal(true);
	pack();
	super.show();
	return buttonHit;
    }
    
    
    private boolean validateInput(){
	String input = rstField.getText();
	StringTokenizer st = new StringTokenizer(input);
	if(!st.hasMoreTokens()){
	     JOptionPane.showMessageDialog(null,
					   "Result file can not be empty",
					   "Error",
					   JOptionPane.ERROR_MESSAGE);
	     return false; 
	}
	
	File testFile = new File(input);
	if(!testFile.canRead()){
	    JOptionPane.showMessageDialog(null,
					  "Can not open result file "+input,
					  "Error",
					  JOptionPane.ERROR_MESSAGE);
	    return false; 
	}

	rstfile = input;
	
	input = outField.getText();
	st = new StringTokenizer(input);
	if(st.hasMoreTokens()){
	    testFile = new File(input);
	    if(!testFile.canRead()){
		JOptionPane.showMessageDialog(null,
					      "Can not open runtime output file "+input,
					      "Error",
					      JOptionPane.ERROR_MESSAGE);
		return false; 
	    }
	    
	}
	
	rtmfile=input;
	return true;
    }

    public void actionPerformed(ActionEvent event){
	String action = event.getActionCommand();
	if(action.equals("rst")){
	    final JFileChooser fc = new JFileChooser();
	    fc.setCurrentDirectory(dirCache);
	    fc.setApproveButtonText("Select");  
	    	    
	    int returnVal = fc.showOpenDialog(this);
	    if (returnVal == JFileChooser.APPROVE_OPTION) {
		File file = fc.getSelectedFile();
		rstField.setText(file.getAbsolutePath());
		dirCache=file.getParentFile();
	    }  
	}
	if(action.equals("rtm")){
	    final JFileChooser fc = new JFileChooser();
	    fc.setCurrentDirectory(dirCache);
	    fc.setApproveButtonText("Select");  
	    	    
	    int returnVal = fc.showOpenDialog(this);
	    if (returnVal == JFileChooser.APPROVE_OPTION) {
		File file = fc.getSelectedFile();
		outField.setText(file.getAbsolutePath());
		dirCache=file.getParentFile();
	    }  
	}
	if(action.equals("ok")){
	    if(validateInput()) {
		setVisible(false);
		buttonHit =JOptionPane.OK_OPTION;	
	    } else
		return;
	    
	}
	
	if(action.equals("cancel")){
	    setVisible(false);
	    buttonHit = JOptionPane.CANCEL_OPTION;
	    return;
	    
	}
	


	
    }
    
    public String getRstFile(){
	return rstfile;
    }
    
    public String getRtmFile(){
	return rtmfile;
    }
    

        
}