package authorizationCode;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.awt.*;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.StringSelection;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;

public class LicenseGeneratorGUI {
	 // µ¥ÊµÀýËøÎļþ·¾¶
    private static final String LOCK_FILE = System.getProperty("user.home") + File.separator + ".license_generator.lock";
    
    public static void main(String[] args) {
        // ¼ì²éÊÇ·ñÒÑÓÐʵÀýÔËÐÐ
        if (!acquireLock()) {
            JOptionPane.showMessageDialog(null, 
                "Èí¼þÒѾ­ÔÚÔËÐÐÖУ¡", 
                "¾¯¸æ", 
                JOptionPane.WARNING_MESSAGE);
            System.exit(0);
        }
        
        SwingUtilities.invokeLater(() -> createAndShowGUI());
    }
    
    /**
     * ³¢ÊÔ»ñÈ¡Ó¦ÓÃËø
     * @return true ±íʾ³É¹¦»ñÈ¡Ëø£¨Ê×´ÎÔËÐУ©£¬false ±íʾÒÑÓÐʵÀýÔËÐÐ
     */
    private static boolean acquireLock() {
        try {
            // ´´½¨ËøÎļþ
            File lockFile = new File(LOCK_FILE);
            if (!lockFile.exists()) {
                lockFile.createNewFile();
            }
            
            // ³¢ÊÔ»ñÈ¡ÎļþËø
            RandomAccessFile raf = new RandomAccessFile(lockFile, "rw");
            FileChannel channel = raf.getChannel();
            FileLock lock = channel.tryLock();
            
            // Ìí¼ÓJVM¹Ø±Õ¹³×ÓÊÍ·ÅËø
            if (lock != null) {
                Runtime.getRuntime().addShutdownHook(new Thread(() -> {
                    try {
                        lock.release();
                        channel.close();
                        raf.close();
                    } catch (Exception e) {
                        // ºöÂԹرÕÒì³£
                    }
                }));
                return true;
            }
        } catch (Exception e) {
            // ÎÞ·¨»ñÈ¡Ëø
        }
        return false;
    }
    private static void createAndShowGUI() {
        // ´´½¨Ö÷´°¿Ú
        JFrame frame = new JFrame("Èí¼þÊÚȨÂëÉú³É¹¤¾ß");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(600, 450);
        frame.setLocationRelativeTo(null);

        // ´´½¨Ö÷Ãæ°å
        JPanel mainPanel = new JPanel();
        mainPanel.setLayout(new BorderLayout(10, 10));
        mainPanel.setBorder(new EmptyBorder(20, 20, 20, 20));
        mainPanel.setBackground(new Color(240, 245, 255));

        // ´´½¨±êÌâ
        JLabel titleLabel = new JLabel("Èí¼þÊÚȨÂëÉú³É¹¤¾ß");
        titleLabel.setFont(new Font("΢ÈíÑźÚ", Font.BOLD, 24));
        titleLabel.setHorizontalAlignment(SwingConstants.CENTER);
        titleLabel.setForeground(new Color(0, 80, 200));
        mainPanel.add(titleLabel, BorderLayout.NORTH);

        // ´´½¨ÊäÈëÃæ°å
        JPanel inputPanel = new JPanel();
        inputPanel.setLayout(new GridLayout(3, 2, 10, 15));
        inputPanel.setBorder(BorderFactory.createTitledBorder("ÊäÈëÐÅÏ¢"));
        inputPanel.setBackground(new Color(250, 250, 255));
        inputPanel.setBorder(new EmptyBorder(15, 15, 15, 15));

        // ¼¤»îÂëÊäÈë
        JLabel activationLabel = new JLabel("¼¤»îÂë :");
        activationLabel.setFont(new Font("΢ÈíÑźÚ", Font.PLAIN, 14));
        JTextField activationField = new JTextField();
        activationField.setFont(new Font("Consolas", Font.PLAIN, 14));
       

        // »úÆ÷ÂëÊäÈë
        JLabel machineLabel = new JLabel("É豸»úÆ÷Âë:");
        machineLabel.setFont(new Font("΢ÈíÑźÚ", Font.PLAIN, 14));
        JTextField machineField = new JTextField();
        machineField.setFont(new Font("Consolas", Font.PLAIN, 14));

        // ½ØÖ¹ÈÕÆÚÊäÈë
        JLabel expiryLabel = new JLabel("ÊÚȨ½ØÖ¹ÈÕÆÚ (YYYY-MM-DD):");
        expiryLabel.setFont(new Font("΢ÈíÑźÚ", Font.PLAIN, 14));
        JTextField expiryField = new JTextField();
        expiryField.setFont(new Font("Consolas", Font.PLAIN, 14));

        // Ìí¼Ó×é¼þµ½ÊäÈëÃæ°å
        inputPanel.add(activationLabel);
        inputPanel.add(activationField);
        inputPanel.add(machineLabel);
        inputPanel.add(machineField);
        inputPanel.add(expiryLabel);
        inputPanel.add(expiryField);

        // ´´½¨°´Å¥Ãæ°å
        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER, 20, 10));
        buttonPanel.setBackground(new Color(240, 245, 255));

        // Éú³É°´Å¥
        JButton generateButton = new JButton("Éú³É×¢²áÂë");
        generateButton.setFont(new Font("΢ÈíÑźÚ", Font.BOLD, 16));
        generateButton.setBackground(new Color(70, 130, 220));
        generateButton.setForeground(Color.WHITE);
        generateButton.setFocusPainted(false);
        generateButton.setPreferredSize(new Dimension(180, 40));

        // ´´½¨Êä³öÃæ°å
        JPanel outputPanel = new JPanel();
        outputPanel.setLayout(new BorderLayout(10, 10));
        outputPanel.setBorder(BorderFactory.createTitledBorder("Éú³ÉµÄ×¢²áÂë"));
        outputPanel.setBackground(new Color(250, 250, 255));
        outputPanel.setBorder(new EmptyBorder(15, 15, 15, 15));

        // ×¢²áÂëÊä³ö
        JTextArea licenseArea = new JTextArea();
        licenseArea.setFont(new Font("Consolas", Font.PLAIN, 14));
        licenseArea.setEditable(false);
        licenseArea.setLineWrap(true);
        licenseArea.setWrapStyleWord(true);
        licenseArea.setBackground(new Color(245, 250, 255));
        
        JScrollPane scrollPane = new JScrollPane(licenseArea);
        scrollPane.setPreferredSize(new Dimension(500, 100));

        // ¸´ÖÆ°´Å¥
        JButton copyButton = new JButton("¸´ÖƵ½¼ôÌù°å");
        copyButton.setFont(new Font("΢ÈíÑźÚ", Font.PLAIN, 14));
        copyButton.setBackground(new Color(100, 180, 100));
        copyButton.setForeground(Color.WHITE);
        copyButton.setFocusPainted(false);

        // Ìí¼Ó×é¼þµ½Êä³öÃæ°å
        outputPanel.add(scrollPane, BorderLayout.CENTER);
        outputPanel.add(copyButton, BorderLayout.SOUTH);

        // Ìí¼Óʼþ¼àÌýÆ÷
        generateButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String base64Key = activationField.getText().trim();
                String machineCode = machineField.getText().trim();
                String expiryDate = expiryField.getText().trim();
                
                if (base64Key.isEmpty() || machineCode.isEmpty() || expiryDate.isEmpty()) {
                    JOptionPane.showMessageDialog(frame, "ËùÓÐ×ֶζ¼±ØÐëÌîд£¡", "ÊäÈë´íÎó", JOptionPane.ERROR_MESSAGE);
                    return;
                }
                
                try {
                    // ʹÓÃÐ޸ĺóµÄLicenseGeneratorÀࣨ¼ûÏ·½Ð޸ģ©
                    String licenseKey = LicenseGenerator.generateLicenseKey(base64Key, machineCode, expiryDate);
                    licenseArea.setText(licenseKey);
                } catch (Exception ex) {
                    JOptionPane.showMessageDialog(frame, "Éú³É×¢²áÂëʱ³ö´í: " + ex.getMessage(), "´íÎó", JOptionPane.ERROR_MESSAGE);
                    ex.printStackTrace();
                }
            }
        });

        copyButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String licenseText = licenseArea.getText();
                if (!licenseText.isEmpty()) {
                    StringSelection selection = new StringSelection(licenseText);
                    Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
                    clipboard.setContents(selection, null);
                    JOptionPane.showMessageDialog(frame, "×¢²áÂëÒѸ´ÖƵ½¼ôÌù°å£¡", "¸´ÖƳɹ¦", JOptionPane.INFORMATION_MESSAGE);
                }
            }
        });

        // Ìí¼Ó×é¼þµ½Ö÷Ãæ°å
        buttonPanel.add(generateButton);
        mainPanel.add(inputPanel, BorderLayout.CENTER);
        mainPanel.add(buttonPanel, BorderLayout.SOUTH);
        
        // ´´½¨ÈÝÆ÷Ãæ°å
        JPanel container = new JPanel(new BorderLayout(10, 20));
        container.setBorder(new EmptyBorder(10, 20, 20, 20));
        container.add(mainPanel, BorderLayout.NORTH);
        container.add(outputPanel, BorderLayout.CENTER);
        
        frame.add(container);
        frame.setVisible(true);
    }
}