"""
Tests for brain_watchdog.main.

Module-level env vars are required at import time; set them before the first
import of the module so tests can run without a real control-plane.
"""
import importlib.util
import os
import time
from unittest.mock import patch

os.environ.setdefault("CONTROL_PLANE_URL", "http://test-cp:8080")
os.environ.setdefault("TG_TOKEN", "test_token")
os.environ.setdefault("TG_CHAT_ID", "12345")

import brain_watchdog.main as bwm


def test_package_importable():
    spec = importlib.util.find_spec("brain_watchdog")
    assert spec is not None


def test_check_ok_fresh():
    now = time.time()
    with patch.object(bwm, "http_get", return_value=(200, {"last_update": now - 10})):
        ok, reason = bwm.check()
    assert ok
    assert "ok" in reason


def test_check_fail_stale():
    now = time.time()
    stale_ts = now - (bwm.STALE_THRESHOLD + 120)
    with patch.object(bwm, "http_get", return_value=(200, {"last_update": stale_ts})):
        ok, reason = bwm.check()
    assert not ok
    assert "stale" in reason


def test_check_fail_unreachable():
    with patch.object(bwm, "http_get", return_value=(None, None)):
        ok, reason = bwm.check()
    assert not ok
    assert "unreachable" in reason


def test_check_fail_http_error():
    with patch.object(bwm, "http_get", return_value=(503, None)):
        ok, reason = bwm.check()
    assert not ok
    assert "503" in reason


def test_check_fail_missing_last_update():
    with patch.object(bwm, "http_get", return_value=(200, {"other": "data"})):
        ok, reason = bwm.check()
    assert not ok
    assert "last_update" in reason


def test_check_fail_unparseable_timestamp():
    with patch.object(bwm, "http_get", return_value=(200, {"last_update": "not-a-number"})):
        ok, reason = bwm.check()
    assert not ok
    assert "parseable" in reason