package Gui;

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import Controller.*;

public class StartRunDlg extends JDialog implements ActionListener{ 

    private int buttonHit;
    private JTextField inputArea;
    private JButton okButton;
    private JButton seedButton;
    private JButton cancelButton;
    
    public  int seed;
    public  int   K;
    public  int   seed_flag = 0;
    public StartRunDlg(){
	setTitle("Run Structure Simulation");
	setLocationRelativeTo(null);

	inputArea = new JTextField(5);
	JLabel title = new JLabel("       Set number of populations assumed  ");
	JPanel sp = new JPanel();
        sp.add(title);
        sp.add(inputArea);
	
	okButton     = new JButton( "        OK        ");
        seedButton   = new JButton("Set random seed ...");
	cancelButton = new JButton("       Cancel      ");    
        okButton.setActionCommand("ok");
	okButton.addActionListener(this);
	seedButton.setActionCommand("seed");
	seedButton.addActionListener(this);
	cancelButton.setActionCommand("cancel");
	cancelButton.addActionListener(this);


	JPanel buttonPane = new JPanel();
	
	buttonPane.add(okButton);
	buttonPane.add(seedButton);
	buttonPane.add(cancelButton);
	buttonPane.setPreferredSize(new Dimension(500,50));
	getContentPane().add("North",new JLabel("           "));
	getContentPane().add("Center",sp);
	getContentPane().add("South", buttonPane);
    }
    public int showDialog(){
	setModal(true);
	pack();
	super.show();
	return buttonHit;
    }
    
    
    private boolean validateInput(){
	
	String sK = inputArea.getText();
	if(sK == null)
	    return false;
	try {
	    K = Integer.parseInt(sK);
	}catch (NumberFormatException e){
	    return false;
	}
	if(K<=0)
	    return false;
	
	return true;
    }
    
    public void actionPerformed(ActionEvent event){
	
	String action = event.getActionCommand();
	if(action.equals("ok")){	
	    if(!validateInput()){
		JOptionPane.showMessageDialog(null,
					      "The input for K is invalid",
					      "Error",
					      JOptionPane.ERROR_MESSAGE);
		return;
	    }
	    buttonHit = 1;								
	    setVisible(false);
	    return;
	}
	if(action.equals("seed")){
	    while(true){
		String sS = JOptionPane.showInputDialog("Set user defined random seed");
		if(sS == null)
		    return;
		try {
		    seed = Integer.parseInt(sS);
		    break;
		}catch (NumberFormatException e){
		    JOptionPane.showMessageDialog(null,
						  "Current input is not a valid integer random seed",
						  "Error",
						  JOptionPane.ERROR_MESSAGE);
		    continue;
		}
	    }
	    seed_flag = 1;
	}
	
	if(action.equals("cancel")){
	    buttonHit = -1;
	    setVisible(false);
	}
    }
}