package wyplataInterfejs;

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

@SuppressWarnings("serial")

class DebetException extends Exception {
	int i;

	DebetException() {
		super();
	}

	DebetException(String msg) {
		super(msg);
	}

	DebetException(int i) {
		this.i = -i;
	}
}

class Przyciski extends JFrame {
	JTextField text = new JTextField(10);
	JButton b1 = new JButton("wpłata/wypłata");
	JTextField text2 = new JTextField(10);
	JTextField result = new JTextField(10);
	JButton unblock = new JButton("odblokuj");
	JButton undo = new JButton("cofnij");
	JButton save = new JButton("zapisz");
	JButton read = new JButton("wczytaj");
	Konto konto = new Konto();

	Przyciski() {
		setTitle("Twoje konto");
		Container cp = getContentPane();
		cp.setLayout(new GridLayout(5, 2, 10, 10));

		cp.add(new JLabel("Stan konta: "));
		cp.add(text);
		cp.add(b1);
		cp.add(text2);
		cp.add(result);
		cp.add(unblock);
		cp.add(save);
		cp.add(read);
		cp.add(undo);
		text.setText(Integer.toString(konto.dajStan()));

		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(450, 800);
		setVisible(true);

		unblock.addActionListener(new Unblock());
		b1.addActionListener(new Wyplata());
		undo.addActionListener(new Undo());
		save.addActionListener(new Save());
		read.addActionListener(new Read());
	}

	int dajLiczbe(JTextField tf) {
		try {
			return Integer.parseInt(tf.getText());
		} catch (NumberFormatException e) {
			return 0;
		}
	}

	class Unblock implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			b1.setEnabled(true);
			text2.setEnabled(true);
		}
	}
	int r=50,g=40,b=30;
	Color Color = new Color(r%250,g%250,b%250);
	class Save implements ActionListener {
		public void actionPerformed(ActionEvent ev) {
			r+=20;
			g-=30;
			b+=25;
			read.setBackground(Color);
			read.setEnabled(true);
			save.setEnabled(false);
			try {
				FileOutputStream f = new FileOutputStream("zapis");
				ObjectOutputStream os = new ObjectOutputStream(f);
				os.writeObject(konto);
				os.writeObject(previous);
				f.close();
			} catch (IOException e) {
			}
			Color = new Color(r%250,g%250,b%250);
		}
	}

	class Read implements ActionListener {
		public void actionPerformed(ActionEvent ev) {
			r+=40;
			g+=20;
			b-=10;
			save.setBackground(Color);
			read.setEnabled(false);
			save.setEnabled(true);
			Konto konto1 = new Konto();
			int previous1;
			//try {
			//	ObjectInputStream is = new ObjectInputStream(new FileInputStream("obiektA"));
			//	konto1 = (Konto) is.readObject();
			//	previous1 = (Integer) is.readObject();
			//	is.close();
			//} catch (IOException e) {
			//	System.out.println("--wyjatek!");
			//} catch (ClassNotFoundException e) {
			//}
			konto = konto1;
			Color = new Color(r%250,g%250,b%250);
		}
	}

	int previous;

	class Undo implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			konto.setStan(previous);
			undo.setEnabled(false);
			text.setText(Integer.toString(konto.dajStan()));// odświeżenie wypisania stanu konta
		}
	}

	class Wyplata implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			int r = konto.dajStan() - dajLiczbe(text2);
			if (r >= 0) {
				previous = konto.dajStan();
				result.setText("OK.");
				konto.setStan(r);
				text.setText(Integer.toString(konto.dajStan()));
				b1.setEnabled(false);
				text2.setEnabled(false);
				undo.setEnabled(true);
			} else {
				result.setText("Brak środków.");
				try {
					konto.e1(r);

				} catch (DebetException exc) {
					result.setText(result.getText() + " Za dużo o " + Integer.toString(exc.i));
				}
			}
		}
	}
}

class Konto {
	private int stan;

	public void setStan(int stan) {
		this.stan = stan;
	}

	Konto() {
		stan = 0;
	}

	public void operacja(int ile) throws DebetException {
		if (stan + ile >= 0)
			stan += ile;
		else
			throw new DebetException();
	}

	public int dajStan() {
		return stan;
	}

	void e1(int n) throws DebetException {
		if (n < 0)
			throw new DebetException(n);

	}

	public static void main(String[] args) {
		JFrame f = new Przyciski();
	}
}