package com.files;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Scanner;

public class Login_Register {

    Scanner input = new Scanner(System.in);
    ArrayList<String> datafile = new ArrayList<String>();

    public void dataRetrieve() {
        try {
            Scanner retrieve = new Scanner(new File(
                    "C:\\Users\\Fujitsu\\Documents\\Java Files\\Data Structure and Algo\\src\\com\\files\\records.txt"));
            while (retrieve.hasNext()) {
                datafile.add(retrieve.next());
            }
            retrieve.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }

    // This is the method for register
    public void resgister() {
        dataRetrieve();
        try {
            // Getting input from the user
            System.out.print("Enter your username: ");
            String username = input.nextLine();
            System.out.print("Enter your password: ");
            String password = input.nextLine();
            // String data = username + " " + password;
            datafile.add(username);
            datafile.add(password);
            input.close();
            PrintWriter writer = new PrintWriter(new FileWriter(
                    "C:\\Users\\Fujitsu\\Documents\\Java Files\\Data Structure and Algo\\src\\com\\files\\records.txt"));

            for (String passingData : datafile) {
                writer.println(passingData);
            }
            writer.close();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    // This is the method for register
    public void login() {
        Boolean found = false;
        String tempUsername = "";
        String tempPassword = "";
        int attempt = 5;
        try {

            Scanner reader = new Scanner(new File(
                    "C:\\Users\\Fujitsu\\Documents\\Java Files\\Data Structure and Algo\\src\\com\\files\\records.txt"));
            System.out.println("Login\n");
            while (reader.hasNext() && !found) {
                System.out.print("Username: ");
                String username = input.nextLine();
                System.out.print("Password: ");
                String password = input.nextLine();

                tempUsername = reader.next();
                tempPassword = reader.next();
                if (tempUsername.trim().equals(username.trim()) && tempPassword.trim().equals(password.trim())) {
                    System.out.println("\n--------------------------------");
                    System.out.println("\nSuccessfully logged in");
                    System.out.println("Hello " + username + " Welcome.");
                    found = true;
                    break;
                }else {
                    System.out.println("Incorrect username or password");
                }
            }
            input.close();
            reader.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        Login_Register lr = new Login_Register();
        System.out.println("[1] - Register\n[2] - Login\nEnter your choice: ");
        int choice = input.nextInt();

        switch (choice) {
        case 1:
            lr.resgister();
            break;
        case 2:
            lr.login();
            break;
        default:
            System.out.println("Invalid input!");
        }
    }
}