/**
 * Write a description of class GuessPanel here.
 * 
 * @author John Paxton
 * @version 1.0
 */

import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

import java.awt.Color;

public class GuessPanel extends JPanel implements ActionListener
{
    GuessPanel(String name)
    {
        answer = (int) (Math.random() * high) + 1;
        
        setBackground(Color.green);
        
        greetingJLabel = new JLabel ("Welcome to the guessing game, " + name);
        add(greetingJLabel);
        
        messageJLabel = new JLabel("Please enter a number between " + 
            low + " and " + high);
        add(messageJLabel);
        
        guessJTextField = new JTextField(10);
        add(guessJTextField);
        
        submitJButton = new JButton("Submit Guess");
        submitJButton.addActionListener(this);
        add(submitJButton);
    }
    
    public void actionPerformed (ActionEvent evt)
    {
        String text = guessJTextField.getText();
        try
        {
            int guess = Integer.parseInt(text);
            if (guess == answer)
            {
                messageJLabel.setText("Congratulations, you win!  The answer was " + 
                    answer);
                submitJButton.setVisible(false);
                guessJTextField.setVisible(false);
            }
            else
            {
                if ((guess > answer) && (guess <= high))
                {
                    high = guess - 1;
                }
                else if ((guess < answer) && (guess >= low))
                {
                    low = guess + 1;
                }
                guessJTextField.setText("");
                messageJLabel.setText("Please enter a number between " +
                    low + " and " + high);
            }
            repaint();
        }
        catch (NumberFormatException e)
        {
            guessJTextField.setText("");
        }
    }
    
    private JLabel greetingJLabel;
    private JLabel messageJLabel;
    private JTextField guessJTextField;
    private JButton submitJButton;
    
    private int answer;
    private int low = 1;
    private int high = 1000;
    
}