import numpy as np

from bookmark.capture_strategies.motion_stop import MotionStopStrategy


def make_frame(value: int) -> np.ndarray:
    return np.full((10, 10, 3), value, dtype=np.uint8)


def test_does_not_fire_while_frames_keep_changing():
    strategy = MotionStopStrategy(motion_threshold=5.0, stable_frames=3)
    for value in range(0, 50, 10):
        assert strategy.observe(make_frame(value)) is False


def test_fires_after_stable_frames():
    strategy = MotionStopStrategy(motion_threshold=5.0, stable_frames=3)
    strategy.observe(make_frame(100))
    strategy.observe(make_frame(100))
    strategy.observe(make_frame(100))
    assert strategy.observe(make_frame(100)) is True


def test_fires_only_once():
    strategy = MotionStopStrategy(motion_threshold=5.0, stable_frames=2)
    strategy.observe(make_frame(50))
    strategy.observe(make_frame(50))
    assert strategy.observe(make_frame(50)) is True
    assert strategy.observe(make_frame(50)) is False


def test_reset_clears_state():
    strategy = MotionStopStrategy(motion_threshold=5.0, stable_frames=2)
    strategy.observe(make_frame(50))
    strategy.observe(make_frame(50))
    strategy.observe(make_frame(50))
    strategy.reset()
    assert strategy.observe(make_frame(50)) is False