UpdateDeleteEmployee.java

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.nio.file.*;
import java.util.List;
import javax.swing.*;

public  class UpdateDeleteEmployee extends JPanel {
    private JTextField mobileField, nameField, fatherNameField, addressField, cnicField, roomNoField;
    private JComboBox<String> livingStatusCombo;
    private JButton searchButton, updateButton, deleteButton;
    private List<String> employeeLines;
    private int employeeIndex;
    private String originalRoomNo;

    public UpdateDeleteEmployee() {
        setLayout(null);
        setBackground(new Color(230, 240, 255));
        setBounds(350, 80, 700, 500);

        JLabel titleLabel = new JLabel("Update & Delete Employee");
        titleLabel.setFont(new Font("SansSerif", Font.BOLD, 24));
        titleLabel.setBounds(20, 20, 300, 30);
        add(titleLabel);

        JLabel mobileLabel = new JLabel("Mobile Number:");
        mobileLabel.setBounds(20, 70, 120, 25);
        add(mobileLabel);
        mobileField = new JTextField();
        mobileField.setBounds(140, 70, 200, 25);
        add(mobileField);
        searchButton = new JButton("Search");
        searchButton.setBounds(350, 70, 100, 25);
        add(searchButton);

        JLabel nameLabel = new JLabel("Name:");
        nameLabel.setBounds(20, 120, 120, 25);
        add(nameLabel);
        nameField = new JTextField();
        nameField.setBounds(140, 120, 200, 25);
        nameField.setEnabled(false);
        add(nameField);

        JLabel fatherNameLabel = new JLabel("Father's Name:");
        fatherNameLabel.setBounds(20, 160, 120, 25);
        add(fatherNameLabel);
        fatherNameField = new JTextField();
        fatherNameField.setBounds(140, 160, 200, 25);
        fatherNameField.setEnabled(false);
        add(fatherNameField);

        JLabel addressLabel = new JLabel("Address:");
        addressLabel.setBounds(20, 200, 120, 25);
        add(addressLabel);
        addressField = new JTextField();
        addressField.setBounds(140, 200, 200, 25);
        addressField.setEnabled(false);
        add(addressField);

        JLabel cnicLabel = new JLabel("CNIC:");
        cnicLabel.setBounds(20, 240, 120, 25);
        add(cnicLabel);
        cnicField = new JTextField();
        cnicField.setBounds(140, 240, 200, 25);
        cnicField.setEnabled(false);
        add(cnicField);

        JLabel roomNoLabel = new JLabel("Room Number:");
        roomNoLabel.setBounds(20, 280, 120, 25);
        add(roomNoLabel);
        roomNoField = new JTextField();
        roomNoField.setBounds(140, 280, 200, 25);
        roomNoField.setEnabled(false);
        add(roomNoField);

        JLabel livingStatusLabel = new JLabel("Living Status:");
        livingStatusLabel.setBounds(20, 320, 120, 25);
        add(livingStatusLabel);
        String[] statusOptions = {"Living", "Leaved"};
        livingStatusCombo = new JComboBox<>(statusOptions);
        livingStatusCombo.setBounds(140, 320, 200, 25);
        livingStatusCombo.setEnabled(false);
        add(livingStatusCombo);

        updateButton = new JButton("Update");
        updateButton.setBounds(140, 360, 100, 30);
        updateButton.setEnabled(false);
        add(updateButton);

        deleteButton = new JButton("Delete");
        deleteButton.setBounds(250, 360, 100, 30);
        deleteButton.setEnabled(false);
        add(deleteButton);

        searchButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                searchEmployee();
            }
        });

        updateButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                updateEmployee();
            }
        });

        deleteButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                deleteEmployee();
            }
        });
    }

    private void searchEmployee() {
        String mobile = mobileField.getText().trim();
        if (mobile.isEmpty()) {
            JOptionPane.showMessageDialog(null, "Please enter a mobile number.");
            return;
        }
        try {
            employeeLines = Files.readAllLines(Paths.get("employees.txt"));
            for (int i = 0; i < employeeLines.size(); i++) {
                String line = employeeLines.get(i);
                String[] parts = line.split(",");
                if (parts.length >= 6 && parts[3].equals(mobile)) {
                    nameField.setText(parts[0]);
                    fatherNameField.setText(parts[1]);
                    addressField.setText(parts[2]);
                    cnicField.setText(parts[4]);
                    roomNoField.setText(parts[5]);
                    livingStatusCombo.setSelectedItem("Living");
                    originalRoomNo = parts[5];
                    employeeIndex = i;
                    enableFields(true);
                    return;
                }
            }
            JOptionPane.showMessageDialog(null, "Employee not found.");
        } catch (IOException ex) {
            ex.printStackTrace();
            JOptionPane.showMessageDialog(null, "Error reading employees file.");
        }
    }

    private void enableFields(boolean enable) {
        nameField.setEnabled(enable);
        fatherNameField.setEnabled(enable);
        addressField.setEnabled(enable);
        cnicField.setEnabled(enable);
        roomNoField.setEnabled(enable);
        livingStatusCombo.setEnabled(enable);
        updateButton.setEnabled(enable);
        deleteButton.setEnabled(enable);
    }

    private void updateEmployee() {
        String name = nameField.getText().trim();
        String fatherName = fatherNameField.getText().trim();
        String address = addressField.getText().trim();
        String cnic = cnicField.getText().trim();
        String mobile = mobileField.getText().trim();
        String roomNo = roomNoField.getText().trim();
        String livingStatus = (String) livingStatusCombo.getSelectedItem();

        if (name.isEmpty() || fatherName.isEmpty() || address.isEmpty() || cnic.isEmpty() || 
            mobile.length() != 11 || cnic.length() != 15) {
            JOptionPane.showMessageDialog(null, "Please fill all fields correctly.");
            return;
        }

        try {
            List<String> roomLines = Files.readAllLines(Paths.get("rooms.txt"));
            if (livingStatus.equals("Leaved")) {
                try (BufferedWriter writer = new BufferedWriter(new FileWriter("leaved_employees.txt", true))) {
                    writer.write(employeeLines.get(employeeIndex));
                    writer.newLine();
                }
                employeeLines.remove(employeeIndex);
                updateRoomStatus(roomLines, originalRoomNo, "Not Booked");
                Files.write(Paths.get("employees.txt"), employeeLines);
                Files.write(Paths.get("rooms.txt"), roomLines);
                JOptionPane.showMessageDialog(null, "Employee marked as Leaved and moved to leaved employees.");
            } else {
                if (!roomNo.equals(originalRoomNo)) {
                    boolean roomAvailable = false;
                    for (String line : roomLines) {
                        String[] parts = line.split(",");
                        if (parts[0].equals(roomNo) && parts[1].equals("Yes") && parts[2].equals("Not Booked")) {
                            roomAvailable = true;
                            break;
                        }
                    }
                    if (!roomAvailable) {
                        JOptionPane.showMessageDialog(null, "Selected room is not available.");
                        return;
                    }
                    updateRoomStatus(roomLines, originalRoomNo, "Not Booked");
                    updateRoomStatus(roomLines, roomNo, "Booked");
                }
                String updatedLine = name + "," + fatherName + "," + address + "," + mobile + "," + cnic + "," + roomNo;
                employeeLines.set(employeeIndex, updatedLine);
                Files.write(Paths.get("employees.txt"), employeeLines);
                Files.write(Paths.get("rooms.txt"), roomLines);
                JOptionPane.showMessageDialog(null, "Employee details updated.");
            }
        } catch (IOException ex) {
            ex.printStackTrace();
            JOptionPane.showMessageDialog(null, "Error updating employee data.");
        } finally {
            clearFields();
        }
    }

    private void deleteEmployee() {
        int confirm = JOptionPane.showConfirmDialog(null, "Are you sure you want to delete this employee?", 
            "Confirm Delete", JOptionPane.YES_NO_OPTION);
        if (confirm == JOptionPane.YES_OPTION) {
            try {
                employeeLines.remove(employeeIndex);
                List<String> roomLines = Files.readAllLines(Paths.get("rooms.txt"));
                updateRoomStatus(roomLines, originalRoomNo, "Not Booked");
                Files.write(Paths.get("employees.txt"), employeeLines);
                Files.write(Paths.get("rooms.txt"), roomLines);
                JOptionPane.showMessageDialog(null, "Employee deleted.");
            } catch (IOException ex) {
                ex.printStackTrace();
                JOptionPane.showMessageDialog(null, "Error deleting employee data.");
            } finally {
                clearFields();
            }
        }
    }

    private void updateRoomStatus(List<String> roomLines, String roomNo, String status) {
        for (int i = 0; i < roomLines.size(); i++) {
            String line = roomLines.get(i);
            String[] parts = line.split(",");
            if (parts[0].equals(roomNo)) {
                parts[2] = status;
                roomLines.set(i, String.join(",", parts));
                break;
            }
        }
    }

    private void clearFields() {
        mobileField.setText("");
        nameField.setText("");
        fatherNameField.setText("");
        addressField.setText("");
        cnicField.setText("");
        roomNoField.setText("");
        livingStatusCombo.setSelectedIndex(0);
        enableFields(false);
    }
}