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

public class login extends JFrame {
    JButton blogin;
    JPanel loginpanel;
    JTextField txuser;
    JTextField pass;
    JButton newUSer;
    JLabel username;
    JLabel password;


    public login() {
        super("Login Autentification");

        blogin = new JButton("Login");
        loginpanel = new JPanel();
        txuser = new JTextField(15);
        pass = new JPasswordField(15);
        newUSer = new JButton("New User?");
        username = new JLabel("User - ");
        password = new JLabel("Pass - ");

        setSize(300, 200);
        setLocation(500, 280);
        loginpanel.setLayout(null);


        txuser.setBounds(70, 30, 150, 20);
        pass.setBounds(70, 65, 150, 20);
        blogin.setBounds(110, 100, 80, 20);
        newUSer.setBounds(110, 135, 80, 20);
        username.setBounds(20, 28, 80, 20);
        password.setBounds(20, 63, 80, 20);

        loginpanel.add(blogin);
        loginpanel.add(txuser);
        loginpanel.add(pass);
        loginpanel.add(newUSer);
        loginpanel.add(username);
        loginpanel.add(password);

        getContentPane().add(loginpanel);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);

        Writer writer = null;
        File check = new File("userPass.txt");
        if (check.exists()) {

            //Checks if the file exists. will not add anything if the file does exist.
        } else {
            try {
                File texting = new File("userPass.txt");
                writer = new BufferedWriter(new FileWriter(texting));
                writer.write("message");
            } catch (IOException e) {
                e.printStackTrace();
            }
        }


        blogin.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                try {
                    File file = new File("userPass.txt");
                    Scanner scan = new Scanner(file);
                    ;
                    String line = null;
                    FileWriter filewrite = new FileWriter(file, true);

                    String usertxt = " ";
                    String passtxt = " ";
                    String puname = txuser.getText();
                    String ppaswd = pass.getText();


                    while (scan.hasNext()) {
                        if (puname.equals(usertxt) && ppaswd.equals(passtxt)) {
                            MainMenu menu = new MainMenu();
                            dispose();
                        }

                        usertxt = scan.nextLine();
                        passtxt = scan.nextLine();
                    }

                    else if(puname.equals("") && ppaswd.equals("")) {
                        JOptionPane.showMessageDialog(null, "Please insert Username and Password");
                    }
                    else{

                        JOptionPane.showMessageDialog(null, "Wrong Username / Password");
                        txuser.setText("");
                        pass.setText("");
                        txuser.requestFocus();
                    }
                } catch (IOException d) {
                    d.printStackTrace();
                }

            }
        });

        newUSer.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                NewUser user = new NewUser();
                dispose();

            }
        });
    }