package com.jsca;

import com.github.sarxos.webcam.Webcam;
import java.awt.Dimension;
import java.awt.Image;
import javax.swing.SwingUtilities;

public class WebcamStreamReader implements StreamReader {
    private final CameraPanel panel;
    private volatile boolean running = true;
    private Webcam webcam;

    public WebcamStreamReader(CameraPanel panel) {
        this.panel = panel;
    }

    @Override
    public void run() {
        try {
            webcam = Webcam.getDefault();
            if (webcam == null) {
                throw new RuntimeException("No webcam detected");
            }

            webcam.setViewSize(new Dimension(640, 480));
            webcam.open();

            while (running && webcam.isOpen()) {
                final Image image = webcam.getImage();
                if (image != null) {
                    SwingUtilities.invokeLater(() -> panel.updateFrame(image));
                }
                Thread.sleep(33); // ~30 FPS
            }
        } catch (Exception e) {
            SwingUtilities.invokeLater(() -> {
                javax.swing.JOptionPane.showMessageDialog(panel,
                    "Error reading from webcam: " + e.getMessage(),
                    "Webcam Error",
                    javax.swing.JOptionPane.ERROR_MESSAGE);
            });
        } finally {
            if (webcam != null && webcam.isOpen()) {
                webcam.close();
            }
        }
    }

    @Override
    public void stop() {
        running = false;
    }
}