"""Publisher must not catch up frames and must recycle native encoders on RSS."""
from latency import (
    next_video_capture,
    should_recycle_encoders,
)


def test_next_video_capture_sleeps_until_due():
    capture, due = next_video_capture(now=10.0, due=10.05, period=1 / 30)
    assert capture is False
    assert due == 10.05


def test_next_video_capture_fires_on_due_and_advances_one_period():
    capture, due = next_video_capture(now=10.0, due=10.0, period=0.05)
    assert capture is True
    assert due == 10.05


def test_next_video_capture_skips_catchup_when_behind():
    # 80 ms late at 30 fps would be two extra ticks if we kept adding period.
    capture, due = next_video_capture(now=10.08, due=10.0, period=1 / 30)
    assert capture is True
    assert due == 10.08 + (1 / 30)


def test_should_recycle_when_anon_rss_exceeds_limit_and_interval_elapsed():
    assert should_recycle_encoders(
        rss_anon_kb=4_000_000, limit_kb=3_000_000,
        now=100.0, last_recycle_at=0.0, min_interval_s=60.0,
    ) is True


def test_should_not_recycle_below_limit():
    assert should_recycle_encoders(
        rss_anon_kb=1_000_000, limit_kb=3_000_000,
        now=100.0, last_recycle_at=0.0, min_interval_s=60.0,
    ) is False


def test_should_not_recycle_inside_min_interval():
    assert should_recycle_encoders(
        rss_anon_kb=5_000_000, limit_kb=3_000_000,
        now=100.0, last_recycle_at=80.0, min_interval_s=60.0,
    ) is False


def test_should_not_recycle_when_limit_disabled():
    assert should_recycle_encoders(
        rss_anon_kb=9_000_000, limit_kb=0,
        now=100.0, last_recycle_at=0.0, min_interval_s=60.0,
    ) is False