"""Global test setup that keeps unit tests independent of optional native packages."""

from __future__ import annotations

import importlib.util
import sys
import types
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
if str(ROOT) not in sys.path:
    sys.path.insert(0, str(ROOT))


class _FakeCapture:
    def __init__(self, path):
        self.path = path

    def get(self, prop):
        return 0.0

    def release(self):
        pass


if importlib.util.find_spec("cv2") is None and "cv2" not in sys.modules:
    cv2 = types.ModuleType("cv2")
    cv2.CAP_PROP_FPS = 5
    cv2.INTER_NEAREST = 0
    cv2.MORPH_CLOSE = 3
    cv2.RETR_EXTERNAL = 0
    cv2.RETR_CCOMP = 2
    cv2.CHAIN_APPROX_SIMPLE = 0
    cv2.GC_PR_BGD = 2
    cv2.GC_PR_FGD = 3
    cv2.GC_FGD = 1
    cv2.GC_INIT_WITH_MASK = 1
    cv2.VideoCapture = _FakeCapture
    cv2.resize = lambda image, size, interpolation=None: image
    cv2.erode = lambda image, kernel, iterations=1: image
    cv2.dilate = lambda image, kernel, iterations=1: image
    cv2.morphologyEx = lambda image, op, kernel: image
    cv2.findContours = lambda image, mode, method: ([], None)
    cv2.approxPolyDP = lambda contour, epsilon, closed: contour
    cv2.contourArea = lambda contour: 0
    cv2.imread = lambda path: None
    cv2.grabCut = lambda *args, **kwargs: None
    sys.modules["cv2"] = cv2