import json
from datetime import datetime
from zoneinfo import ZoneInfo

from app.modules.dwell_engine import DwellEngine
from app.modules.notifier import append_json_event, dispatch_json_event


def test_append_json_event_writes_jsonl(tmp_path):
    output = tmp_path / "logs" / "events.jsonl"

    append_json_event(output, {"event": "long_stay_alert", "count": 5})
    append_json_event(output, {"event": "half_hour_report", "count": 3})

    lines = output.read_text(encoding="utf-8").splitlines()

    assert json.loads(lines[0]) == {"event": "long_stay_alert", "count": 5}
    assert json.loads(lines[1]) == {"event": "half_hour_report", "count": 3}


def test_dispatch_json_event_posts_report_without_tracks(tmp_path, monkeypatch):
    tz = ZoneInfo("Asia/Shanghai")
    window_start = datetime(2026, 4, 15, 11, 7, tzinfo=tz)
    engine = DwellEngine(
        camera_id="store_cam_01",
        queue_time_threshold_seconds=300,
        crowded_count_threshold=5,
        normal_count_threshold=2,
        pause_timeout_seconds=300,
        alert_cooldown_seconds=600,
        report_window_start=window_start,
    )

    engine.process_observations(
        [{"person_id": f"cust_{idx}", "role": "customer"} for idx in range(6)],
        window_start,
    )
    events = engine.process_observations([], window_start.replace(minute=37))
    report_event = next(event for event in events if event["event"] == "half_hour_report")

    sent: dict[str, object] = {}

    class DummyResponse:
        def __enter__(self):
            return self

        def __exit__(self, exc_type, exc, tb):
            return False

    def fake_urlopen(req, timeout):
        sent["url"] = req.full_url
        sent["timeout"] = timeout
        sent["payload"] = json.loads(req.data.decode("utf-8"))
        return DummyResponse()

    monkeypatch.setattr("app.modules.notifier.request.urlopen", fake_urlopen)

    output = tmp_path / "logs" / "events.jsonl"
    dispatch_json_event(
        output,
        report_event,
        webhook_url="https://example.test/webhook",
        timeout_seconds=5.0,
    )

    assert sent["url"] == "https://example.test/webhook"
    assert sent["timeout"] == 5.0
    assert sent["payload"]["event"] == "half_hour_report"
    assert "tracks" not in sent["payload"]