package Randomizer;
import java.awt.Color;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.util.*;
import java.util.Random;
import javax.swing.JTextArea;
public class Randomizer extends JPanel implements ActionListener {
    private JButton goButton = new JButton("Balance");
    private JButton resetButton = new JButton("Reset");
    private JButton testButton = new JButton("Test");
    private JTextField balance = new JTextField(2);
    private JTextArea ta = new JTextArea(3, 10);



    public Randomizer() {
        add(resetButton);
        add(goButton);
        add(balance);
        add(testButton);
        add(ta);
        balance.setText("0");
        goButton.addActionListener(this);
        resetButton.addActionListener(this);
        testButton.addActionListener(this);
  }
    public void actionPerformed(ActionEvent evt) {
        int entry = 0;
        Object source = evt.getSource();
        Color color = getBackground();
        if (source == resetButton){
            color = Color.white;
            balance.setText("0");
            ta.setText("");
        }
        else if (source == goButton){
            entry = getter();
            int random = rando();
            if (random < entry){
                color = Color.green;
                ta.setText("Go Go Go!");
            }else if (random >= entry){
                color = Color.red;
                ta.setText("No No No!");

            }
        }
        else if (source==testButton)
            tester();


        setBackground(color);
        repaint();
    }
    public int getter(){
        int e = 0;
        try {
            e = Integer.parseInt(balance.getText());
            }catch  ( NullPointerException npe )   {    e = 0;}
             catch  ( NumberFormatException nfe )   {   e = 0; }
        return e;
    }

    public void tester(){
        ta.setText("");
        int pos = 0; int neg = 0;
        int testEntry = getter();
        for (int i = 0;i<100000;i++){
            int testRand = rando();
            if (testRand < testEntry)
                pos++;
            else if (testRand >= testEntry)
                neg++;
        }
       ta.append("Testing 100000 simulations\n");
       ta.append("There were " + pos + " positives\n");
       ta.append("There were " + neg + " negatives\n");

    }



    public static int rando(){
        int hi = 99; int lo = 0;
        Random rn = new Random();
        int n = hi - lo + 1;
        int i = rn.nextInt() % n;
        if (i < 0)
            i = -i;
        return lo + i;
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Range Balancer by jwc529");
        frame.setSize(275, 125);
        frame.addWindowListener(new WindowAdapter() {

    public void windowClosing(WindowEvent e) {
        System.exit(0);
    }
    });
    Container contentPane = frame.getContentPane();
    contentPane.add(new Randomizer());
    frame.show();
  }
}

int i = rn.nextInt() % n;

int i = rn.nextInt() / ((RAND_MAX/n)+1);

int i = rn.nextInt(n)

    public static void main(String[] args) {
        SwingUtilities.invokeLater( new Runnable() {
            public void run() {
                final JFrame frame = new JFrame("Range Balancer by jwc529");
                frame.setSize(275, 125);
                frame.addWindowListener(new WindowAdapter() {

                    public void windowClosing(WindowEvent e) {
                        System.exit(0);
                    }
                });
                Container contentPane = frame.getContentPane();
                contentPane.add(new Randomizer());
                frame.setVisible( true );
            }
        } );
    }