import cv2
import numpy as np

def detect_hand_gesture(frame):
    x, y, w, h = 100, 100, 200, 150
    roi = frame[y:y+h, x:x+w]

    hsv = cv2.cvtColor(roi, cv2.COLOR_BGR2HSV)

    # Hautfarbe grob einschränken
    lower_skin = np.array([0, 30, 60], dtype=np.uint8)
    upper_skin = np.array([20, 150, 255], dtype=np.uint8)

    mask = cv2.inRange(hsv, lower_skin, upper_skin)
    mask = cv2.GaussianBlur(mask, (5, 5), 0)

    contours, _ = cv2.findContours(mask, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)

    gesture = "none"

    if contours:
        contour = max(contours, key=cv2.contourArea)
        area = cv2.contourArea(contour)

        if area > 3000:
            print(f"[debug] Fläche erkannt: {int(area)}")
            gesture = "hand"

    return gesture, (x, y, w, h)