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

public class ClientApp extends JFrame {
    private JTextArea textArea;
    private JButton loadButton;
    private File file = new File("clients.txt");

    public ClientApp() {
        setTitle("Client Viewer");
        setSize(400, 300);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        textArea = new JTextArea();
        loadButton = new JButton("Load Clients");

        add(new JScrollPane(textArea), BorderLayout.CENTER);
        add(loadButton, BorderLayout.SOUTH);

        loadButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                loadClientsFromFile();
            }
        });

        setVisible(true);
    }

    private void loadClientsFromFile() {
        textArea.setText("");
        try (BufferedReader br = new BufferedReader(new FileReader(file))) {
            String line;
            while ((line = br.readLine()) != null) {
                String[] data = line.split(",");
                if (data.length == 4) {
                    textArea.append("ID: " + data[0] + "\n");
                    textArea.append("Name: " + data[1] + "\n");
                    textArea.append("Address: " + data[2] + "\n");
                    textArea.append("Phone: " + data[3] + "\n");
                    textArea.append("-------------------------\n");
                }
            }
        } catch (IOException ex) {
            JOptionPane.showMessageDialog(this, "Error reading file: " + ex.getMessage());
        }
    }

    public static void main(String[] args) {
        new ClientApp();
    }
}