import java.util.Scanner;

import java.io.IOException;

import java.io.*;

import java.util.*;

public class Employee {

// username and password storage

private String filename;

private Map<String, String> employees = new HashMap<>();

// Constructor

Employee(String filename1)

{

filename=filename1;

}

// Method to load employee data from file

public void load_EmployeeData() {

try {

BufferedReader reader = new BufferedReader(new FileReader(filename));

String line;

while ((line = reader.readLine()) != null) {

String[] parts = line.split(",");

if (parts.length == 2) {

String username = parts[0].trim(); // remove extra spaces

String pass = parts[1].trim(); // remove extra spaces

employees.put(username, pass);

}

}

reader.close();

} catch (IOException e) {

System.out.println(e.getMessage());

}

}

public void displayEmployees() {

for (Map.Entry<String, String> entry : employees.entrySet()) {

System.out.println("Username: " + entry.getKey() + ", Password: " + entry.getValue());

}

}

// Method to check if an employee is valid (login)

public boolean is_Employee() {

Scanner scanner = new Scanner(System.in);

System.out.print("Enter username: ");

String username = scanner.nextLine();

System.out.print("Enter password: ");

String password = scanner.nextLine();

return employees.containsKey(username) && employees.get(username).equals(password);

}

// Method to change password

public void Change_password() {

Scanner scanner = new Scanner(System.in);

System.out.print("Enter username: ");

String username = scanner.nextLine();

System.out.print("Enter current password: ");

String password = scanner.nextLine();

// Check if the current username and password match

if (employees.containsKey(username) && employees.get(username).equals(password)) {

System.out.print("Enter new password: "); // Asking for new password

String newPassword = scanner.nextLine();

employees.put(username, newPassword); // Updating password

System.out.println("Password updated successfully for user: " + username);

saveEmployeeData();

} else {

System.out.println("You have entered the wrong password.");

}

}

public void saveEmployeeData() {

try {

BufferedWriter writer = new BufferedWriter(new FileWriter(filename));

for (Map.Entry<String, String> entry : employees.entrySet()) {

writer.write(entry.getKey() + "," + entry.getValue());

writer.newLine();

}

writer.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}