import importlib.util
import pathlib

_p = pathlib.Path(__file__).resolve().parents[2] / "scripts" / "health_watch.py"
_spec = importlib.util.spec_from_file_location("health_watch", _p)
hw = importlib.util.module_from_spec(_spec)
_spec.loader.exec_module(hw)

_OK = {"status": "healthy", "schedulers": {"swing": {"alive": True, "stale": False}},
       "db_worker": {"alive": True}, "dlq": {"manual": 0}}


def test_healthy_has_no_problems():
    assert hw.problems_v1(_OK) == []


def test_dead_scheduler_detected_even_if_http_200():
    h = {**_OK, "status": "degraded", "schedulers": {"swing": {"alive": False, "stale": False}}}
    p = hw.problems_v1(h)
    assert any("swing" in x for x in p)


def test_stale_and_dbworker_and_dlq():
    h = {**_OK, "schedulers": {"dt": {"alive": True, "stale": True, "last_cycle_age": 900}},
         "db_worker": {"alive": False}, "dlq": {"manual": 2}}
    assert len(hw.problems_v1(h)) == 3


def test_non_dict_is_problem():
    assert hw.problems_v1("<html>") != []


def test_alert_after_threshold_once_then_recover():
    s, a = hw.next_state_v1({}, ["x"], 2)
    assert a is None
    s, a = hw.next_state_v1(s, ["x"], 2)
    assert a == "alert"
    s, a = hw.next_state_v1(s, ["x"], 2)
    assert a is None
    s, a = hw.next_state_v1(s, [], 2)
    assert a == "recover" and s == {"fails": 0, "alerted": False}