import javax.swing.*;
import java.awt.*;

public class EncryptionTool {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(EncryptionGUI::new);
    }
}

class EncryptionGUI extends JFrame {
    private JTextArea inputTextArea, outputTextArea;
    private JComboBox encryptionMethod;
    private JTextField keyField;

    public EncryptionGUI() {
        setTitle("Encryption Tool");
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        JPanel topPanel = new JPanel(new GridLayout(3, 2));
        topPanel.add(new JLabel("Enter Text:"));
        inputTextArea = new JTextArea(3, 20);
        topPanel.add(new JScrollPane(inputTextArea));

        topPanel.add(new JLabel("Key (number for Caesar, char for XOR):"));
        keyField = new JTextField();
        topPanel.add(keyField);

        encryptionMethod = new JComboBox(new String[]{"Caesar Cipher", "XOR Encryption"});
        topPanel.add(new JLabel("Method:"));
        topPanel.add(encryptionMethod);

        add(topPanel, BorderLayout.NORTH);

        outputTextArea = new JTextArea(3, 20);
        outputTextArea.setEditable(false);
        add(new JScrollPane(outputTextArea), BorderLayout.CENTER);

        JPanel buttonPanel = new JPanel();
        JButton encryptButton = new JButton("Encrypt");
        JButton decryptButton = new JButton("Decrypt");
        buttonPanel.add(encryptButton);
        buttonPanel.add(decryptButton);
        add(buttonPanel, BorderLayout.SOUTH);

        encryptButton.addActionListener(e -> processText(true));
        decryptButton.addActionListener(e -> processText(false));

        setVisible(true);
    }

    private void processText(boolean isEncrypt) {
        String text = inputTextArea.getText();
        String keyText = keyField.getText();
        String method = (String) encryptionMethod.getSelectedItem();
        String result = "";

        if (method.equals("Caesar Cipher")) {
            int key = Integer.parseInt(keyText);
            result = isEncrypt ? caesarCipher(text, key) : caesarCipher(text, -key);
        } else if (method.equals("XOR Encryption")) {
            char key = keyText.charAt(0);
            result = xorCipher(text, key);
        }

        outputTextArea.setText(result);
    }

    private String caesarCipher(String text, int shift) {
        StringBuilder result = new StringBuilder();
        for (char c : text.toCharArray()) {
            if (Character.isLetter(c)) {
                char base = Character.isLowerCase(c) ? 'a' : 'A';
                result.append((char) ((c - base + shift + 26) % 26 + base));
            } else {
                result.append(c);
            }
        }
        return result.toString();
    }

    private String xorCipher(String text, char key) {
        StringBuilder result = new StringBuilder();
        for (char c : text.toCharArray()) {
            result.append((char) (c ^ key));
        }
        return result.toString();
    }
}