import cv2
from pyzbar import pyzbar
import subprocess

def detect_qr_code(frame):
    detected_barcodes = pyzbar.decode(frame)
    for barcode in detected_barcodes:
        if barcode.type == 'QRCODE':
            return barcode.data.decode('utf-8')
    return None

def main():
    cap = cv2.VideoCapture(0)  # open default USB camera (index 0)
    if not cap.isOpened():
        print('Error: Cannot access camera')
        return

    print('Starting camera. Press q to quit.')

    while True:
        ret, frame = cap.read()
        if not ret:
            print('Error: Cannot read frame')
            break

        qr_data = detect_qr_code(frame)
        if qr_data:
            print(f'Detected QR Code: {qr_data}')
            # Call the play script with this QR code data as argument
            subprocess.Popen(['python3', 'play_spotify.py', qr_data])
            break

        cv2.imshow('QR Code Detector', frame)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

    cap.release()
    cv2.destroyAllWindows()

if __name__ == '__main__':
    main()