package javaapplication12;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.*;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import java.io.*;
import java.util.Scanner;

public class LoginPage extends JFrame {

   JTextField txtuserid;
    JTextField txtpn;
    JPasswordField txtpwd;
    JButton btnLogin;
    String username, password;
    JRadioButton b1, b2;

    public LoginPage() {
        super("Log In");
        getContentPane().setLayout(null);

        JLabel lblUserid = new JLabel("User ID:");
        lblUserid.setBounds(60, 190, 112, 24);
        getContentPane().add(lblUserid);

        JLabel lblPassword = new JLabel("Password:");
        lblPassword.setBounds(60, 240, 103, 24);
        getContentPane().add(lblPassword);

        JLabel lblIP = new JLabel("Port Number:");
        lblIP.setBounds(60, 290, 92, 24);
        getContentPane().add(lblIP);

        txtuserid = new JTextField();
        txtuserid.setBounds(160, 190, 149, 30);
        getContentPane().add(txtuserid); // add textField to frame
        txtuserid.setColumns(10);

        txtpwd = new JPasswordField();
        txtpwd.setBounds(160, 240, 150, 30);
        getContentPane().add(txtpwd); // add textField to frame
        txtpwd.setColumns(10);

        txtpn = new JTextField();
        txtpn.setBounds(160, 290, 150, 30);
        getContentPane().add(txtpn); // add textField to frame
        txtpn.setColumns(10);
        txtpn.addKeyListener(new KeyAdapter() {
            public void keyTyped(KeyEvent e) {
                char c = e.getKeyChar();
                if (((c < '0') || (c > '9')) && (c != KeyEvent.VK_BACK_SPACE)) {
                    e.consume();
                }
            }
        });

        btnLogin = new JButton("Login");
        btnLogin.setBounds(150, 400, 100, 20);
        getContentPane().add(btnLogin);
        btnLogin.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                username = txtuserid.getText();
                password = txtpwd.getText();
                if (username.equals("") || password.equals("") || txtpn.getText().equals("")) {
                    JOptionPane.showMessageDialog(null, "Please fill in the blank(s).");
                } else {
                    boolean access = validation();
                    if (access == true) {
                        if (b1.isSelected()) {
                            try{
                            int portnumber = Integer.parseInt(txtpn.getText());
                            setVisible(false);
                            }
                            catch(Exception ex)
                            {
                                System.out.println("Unable to open AgentClient: "+ex);
                            }
                        } else if (b2.isSelected()) {
                            try{
                            int portnumber = Integer.parseInt(txtpn.getText());
                                new Client(portnumber);
                            setVisible(false);
                            }
                            catch(Exception ex)
                            {
                                System.out.println("Unable to open Client: "+ex);
                            }
                        }
                    }
                    else
                    {
                        JOptionPane.showMessageDialog(null, "Incorrect Username & Password");
                    }
                }

            }
        });

        JButton btnExit = new JButton("Exit");
        btnExit.setBounds(150, 450, 100, 20);
        getContentPane().add(btnExit);
        btnExit.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            }
        });

        ButtonGroup radiobutton = new ButtonGroup();
        b1 = new JRadioButton("Agent");
        b1.setBounds(75, 350, 100, 20);
        radiobutton.add(b1);
        b2 = new JRadioButton("Client");
        b2.setBounds(225, 350, 100, 20);
        radiobutton.add(b2);
        getContentPane().add(b1);
        getContentPane().add(b2);

        setResizable(false);
        setVisible(true);
        setBounds(100, 100, 400, 600);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    LoginPage loginpage = new LoginPage();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public boolean validation() {
        boolean valid = false;
        try {
            File file = new File("user.txt");
            Scanner input = new Scanner(file);

            while (input.hasNext()) {
                String id = input.next();
                String pw = input.next();
                if (id.equalsIgnoreCase(username) && pw.equals(password)) {
                    valid = true;
                    return valid;
                }
            }
        } catch (Exception e) {
            System.out.println("Exception thrown in validation: " + e);
        }
        return valid;
    }
}