import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Arrays;
import java.util.Random;

import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;
import javax.swing.plaf.basic.BasicButtonUI;

@SuppressWarnings("serial")
public class BubbleSort extends JPanel implements ActionListener
{
	int swaps;
	int maxswaps;
	int[] array;

	int arrayLength = 12;
	int maxNumber = 100;
	int minNumber = 0;

	JLabel arrayLabel;
	JLabel tipLabel = new JLabel();
	JButton startButton = new JButton("Start");
	JButton titleButton = new JButton("BubbleSort");

	public static void main(String[] args)
	{
		BubbleSort panel = new BubbleSort();
		panel.setLayout(null);
		panel.setBackground(Color.WHITE);
		panel.setFocusable(true);
		panel.setBackground(new Color(47,47,47));

		JFrame frame = new JFrame("Bubble Sort");
		frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		frame.setSize(800, 500);
		frame.setContentPane(panel);
		frame.setVisible(true);
		moveToMiddle(frame);
	}

	public BubbleSort()
	{
		array = new int[arrayLength];
		Random r = new Random();
		for(int i=0; i < array.length; i++)
		{
			int num = r.nextInt(maxNumber) + minNumber;
			array[i] = num;
		}

		arrayLabel = new JLabel(Arrays.toString(array));
		arrayLabel.setFont(new Font("Bahnschrift", Font.PLAIN, 35));

		tipLabel.setFont(new Font("Bahnschrift", Font.PLAIN, 35));

		tipLabel.setVerticalAlignment(SwingConstants.CENTER);
		tipLabel.setHorizontalAlignment(SwingConstants.CENTER);
		tipLabel.setForeground(Color.white);

		arrayLabel.setVerticalAlignment(SwingConstants.CENTER);
		arrayLabel.setHorizontalAlignment(SwingConstants.CENTER);
		arrayLabel.setForeground(Color.white);

		startButton.setFont(new Font("Bahnschrift", Font.PLAIN, 35));
		startButton.setUI(new MyButtonUI());
		startButton.setForeground(Color.white);
		startButton.setBackground(new Color(0x551a8b));
		startButton.addActionListener(this);
		startButton.setActionCommand("start");

		titleButton.setFont(new Font("Bahnschrift", Font.PLAIN, 35));
		titleButton.setUI(new MyButtonUI());
		titleButton.setForeground(Color.white);
		titleButton.setBackground(new Color(0x551a8b));
		titleButton.addActionListener(this);
		titleButton.setActionCommand("title");

		this.add(arrayLabel);	this.add(tipLabel);	this.add(startButton);	this.add(titleButton);
	}

	public void paintComponent(Graphics g)
	{
		super.paintComponent(g);

		arrayLabel.setBounds(50, 125, getWidth()-100, 100);
		tipLabel.setBounds(50 , 275 , getWidth()-100, 100);
		startButton.setBounds(0, 60, getWidth(), 50);
		titleButton.setBounds(0, 0, getWidth(), 50);
	}

	private void bubbleSort(int[] array)
	{
		maxswaps = (int) Math.pow(array.length,2);
		int tempnum = 0;
		for(int i=0; i < array.length; i++)
		{
			for(int num=1; num < (array.length-i); num++)
			{
				if(array[num-1] > array[num])
				{
					tempnum = array[num-1];
					array[num-1] = array[num];
					array[num] = tempnum;
					tipLabel.setText("Swapping " + tempnum + " and " + array[num-1]);
					arrayLabel.setText(Arrays.toString(array));
					swaps++;
					SwingUtilities.invokeLater(()->repaint());
					try
					{
						Thread.sleep(700);
						Thread.currentThread().interrupt();
					}
					catch (InterruptedException e)
					{

					}
				}
			}
		}
		tipLabel.setForeground(Color.RED);
		tipLabel.setText("Sorted in ascending order!");
		startButton.setEnabled(true);
		titleButton.setEnabled(true);
	}

	public static void moveToMiddle(JFrame frame)
	{
		GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
	    int screenWidth = gd.getDisplayMode().getWidth();
	    int screenHeight = gd.getDisplayMode().getHeight();
		frame.setBounds((screenWidth/2) - (frame.getWidth()/2), (screenHeight/2) - (frame.getHeight()/2), frame.getWidth(), frame.getHeight());
	}

	public void actionPerformed(ActionEvent arg0)
	{
		String e = arg0.getActionCommand();
		if(e.equals("title"))
		{
			array = new int[arrayLength];
			Random r = new Random();
			for(int i=0; i < array.length; i++)
			{
				int num = r.nextInt(maxNumber) + minNumber;
				array[i] = num;
			}
			arrayLabel.setText(Arrays.toString(array));
		}
		if(e.equals("start"))
		{
			 new Thread(()->bubbleSort(array)).start();
			 startButton.setEnabled(false);
			 titleButton.setEnabled(false);
		}
	}
}

class MyButtonUI extends BasicButtonUI
{
    public void installUI (JComponent c)
    {
        super.installUI(c);
        AbstractButton button = (AbstractButton) c;
        button.setOpaque(false);
        button.setBorder(new EmptyBorder(5, 15, 5, 15));
    }
    public void paint (Graphics g, JComponent c)
    {
        AbstractButton b = (AbstractButton) c;
        paintBackground(g, b, b.getModel().isPressed() ? 2 : 0);
        super.paint(g, c);
    }
    private void paintBackground (Graphics g, JComponent c, int yOffset)
    {
        Dimension size = c.getSize();
        Graphics2D g2 = (Graphics2D) g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g.setColor(c.getBackground().darker());
        g.fillRoundRect(0, yOffset, size.width, size.height - yOffset, 10, 10);
        g.setColor(c.getBackground());
        g.fillRoundRect(0, yOffset, size.width, size.height + yOffset - 5, 10, 10);
    }
}