import java.io.*;
import java.util.*;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

@SuppressWarnings("serial")
public class Bank extends JFrame {
	private JTextField usernameField;
	private JButton register;
	private JButton login;
	private JLabel loginMessage;
	private JPasswordField passwordField;
	private JButton registerEnter;
	private JButton loginEnter;
	private JLabel invalidUserPass;
	private JLabel welcome;
	private List<Account> directory;

	public Bank() {
		super("Banking Simulation");
		setLayout(new FlowLayout());
		directory = new ArrayList<>();

		loginMessage = new JLabel();
		loginMessage.setText("Choose a username (enter on the left) and a password (enter on the right)");
		loginMessage.setVisible(false);
		add(loginMessage);

		register = new JButton();
		register.setText("Click here to register an account");
		//button1.setToolTipText("This is a button!");
		register.setSize(200, 200);
		add(register);

		login = new JButton();
		login.setText("Click here to log in");
		//button2.setToolTipText("This is a button!");
		login.setSize(200, 200);
		add(login);

		usernameField = new JTextField("(Username):                  ");
		usernameField.setVisible(false);
		add(usernameField);

		passwordField = new JPasswordField("mypass               ");
		passwordField.setVisible(false);
		add(passwordField);

		registerEnter = new JButton();
		registerEnter.setText("Enter");
		registerEnter.setVisible(false);
		add(registerEnter);

		loginEnter = new JButton();
		loginEnter.setText("Enter");
		loginEnter.setVisible(false);
		add(loginEnter);

		invalidUserPass = new JLabel();
		invalidUserPass.setText("Invalid User/Pass");
		invalidUserPass.setVisible(false);
		add(invalidUserPass);

		welcome = new JLabel();
		welcome.setText("");
		welcome.setVisible(false);
		add(welcome);

		thehandler handler = new thehandler();
		usernameField.addActionListener(handler);
		passwordField.addActionListener(handler);

		register.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent event) {
				register.setVisible(false);
				login.setVisible(false);
				usernameField.setVisible(true);
				passwordField.setVisible(true);
				loginMessage.setVisible(true);
				registerEnter.setVisible(true);
			}

		});

		registerEnter.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent event) {
				KeyPairGeneration kp = new KeyPairGeneration();
				directory.add(new Account(usernameField.getText(), passwordField.getPassword(), kp.generatePublicKeys(), kp.generatePrivateKeys()));
				register.setVisible(true);
				login.setVisible(true);
				usernameField.setVisible(false);
				passwordField.setVisible(false);
				loginMessage.setVisible(false);
				registerEnter.setVisible(false);
			}
		});

		login.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent event) {
				register.setVisible(false);
				login.setVisible(false);
				loginMessage.setText("Enter your username (on the left) and your password (on the right)");
				usernameField.setText("(Username):                  ");
				usernameField.setVisible(true);
				passwordField.setText("mypass               ");
				passwordField.setVisible(true);
				loginMessage.setVisible(true);
				loginEnter.setVisible(true);
			}

		});

		loginEnter.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent event) {
				String user = usernameField.getText();
				char[] pass = passwordField.getPassword();
				Account client;
				boolean exists = false;
				for (Account a : directory)
				{
					if (user.equals(a.getUser()) && pass.equals(a.getPass()));
					{
						client = a;
						usernameField.setVisible(false);
						passwordField.setVisible(false);
						loginMessage.setVisible(false);
						loginEnter.setVisible(false);
						invalidUserPass.setVisible(false);
						welcome.setText("Welcome " + client.getUser() + "!");
						welcome.setVisible(true);
						exists = true;
						break;
					}
				}
				if (!exists)
				{
					invalidUserPass.setVisible(true);
				}

			}
		});

	}

	private class thehandler implements ActionListener {
		public void actionPerformed(ActionEvent event) {
			String string = "";

			if(event.getSource() == usernameField) {
				string = String.format("field 1: %s", event.getActionCommand());
			}
			else if(event.getSource() == passwordField){
				string = String.format("password field is: %s", event.getActionCommand());
			}

			JOptionPane.showMessageDialog(null, string);
		}
	}

}