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

public class CreditsPanel extends JPanel {
    private JList<String> creditsList;
    private JScrollPane scrollPane;
    private Timer timer;
    private int scrollPos = 0;

    public CreditsPanel(String[] data, Runnable onComplete) {
        setLayout(new BorderLayout());
        setBackground(Color.BLACK);

        //JList
        creditsList = new JList<>(data);
        creditsList.setBackground(Color.BLACK);
        creditsList.setForeground(Color.WHITE);
        creditsList.setFont(new Font("SansSerif", Font.BOLD, 20));
        creditsList.setFixedCellHeight(40); // Consistent spacing

        DefaultListCellRenderer renderer = (DefaultListCellRenderer) creditsList.getCellRenderer();
        renderer.setHorizontalAlignment(SwingConstants.CENTER);

        //ScrollPane
        scrollPane = new JScrollPane(creditsList);
        scrollPane.setBorder(null);
        scrollPane.getVerticalScrollBar().setPreferredSize(new Dimension(0, 0)); // Hidden bar
        add(scrollPane, BorderLayout.CENTER);

        //Animation
        timer = new Timer(30, e -> {
            JScrollBar vertical = scrollPane.getVerticalScrollBar();
            scrollPos++;
            vertical.setValue(scrollPos);

            // Add a buffer (e.g., 100 pixels) to the finish check
            // to keep it on screen longer
            if (scrollPos >= (vertical.getMaximum() - vertical.getVisibleAmount()) + 100) {
                timer.stop();
                onComplete.run();
            }
        });

        // Skip Button
        JButton skip = new JButton("SKIP");
        skip.addActionListener(e -> {
            timer.stop();
            onComplete.run();
        });
        add(skip, BorderLayout.SOUTH);
    }

    public void start() {
        scrollPos = 0;
        timer.start();
    }
}