from datetime import datetime, timedelta, timezone

from common.enums import ErrorType
from services.external.open_meteo import OpenMeteoRequestFailed


WEATHER = {
    "temperature": 24.3,
    "weather_code": 1,
    "wind_speed": 3.2,
    "observed_at": "2026-08-27T14:00",
    "timezone": "Asia/Seoul",
    "latitude": 33.46,
    "longitude": 126.31,
}


async def test_weather_uses_region_cache(client, monkeypatch):
    calls = 0

    async def fetch(_lat, _lon):
        nonlocal calls
        calls += 1
        return WEATHER

    monkeypatch.setattr("services.local_content_service.fetch_current_weather", fetch)
    params = {"region_code": "50110253", "latitude": 33.46, "longitude": 126.31}

    first = (await client.get("/v1/local/weather", params=params)).json()
    second = (await client.get("/v1/local/weather", params=params)).json()

    assert first["weather"]["temperature"] == 24.3
    assert first["cached"] is False
    assert second["cached"] is True
    assert calls == 1


async def test_weather_returns_stale_cache_when_upstream_fails(client, db_engine, monkeypatch):
    params = {"region_code": "50110253", "latitude": 33.46, "longitude": 126.31}
    monkeypatch.setattr("services.local_content_service.fetch_current_weather", lambda *_: _async_value(WEATHER))
    await client.get("/v1/local/weather", params=params)

    async with db_engine.begin() as conn:
        from sqlalchemy import text
        await conn.execute(text("UPDATE area_contents SET expires_at = :expired"), {
            "expired": datetime.now(timezone.utc) - timedelta(minutes=1)
        })

    async def fail(*_args):
        raise OpenMeteoRequestFailed("fail")

    monkeypatch.setattr("services.local_content_service.fetch_current_weather", fail)
    body = (await client.get("/v1/local/weather", params=params)).json()
    assert body["result"]["code"] == ErrorType.SUCCESS.value
    assert body["cached"] is True
    assert body["stale"] is True
    assert body["weather"]["temperature"] == 24.3


async def _async_value(value):
    return value