import httpx
import pytz
from datetime import datetime
from timezonefinder import TimezoneFinder
from config import OPEN_METEO_URL

tf = TimezoneFinder()

async def get_today_snowfall_async(lat, lon):
    tz_name = tf.timezone_at(lat=lat, lng=lon) or "UTC"

    async with httpx.AsyncClient(timeout=5) as client:
        params = {"latitude": lat, "longitude": lon, "hourly": "snowfall", "timezone": tz_name}
        r = await client.get(OPEN_METEO_URL, params=params)
        r.raise_for_status()
        data = r.json()

    hourly = data.get("hourly", {})
    times = hourly.get("time", [])
    snow_values = hourly.get("snowfall", [])

    today_str = datetime.now(pytz.timezone(tz_name)).date().isoformat()

    snowfall_cm = 0.0
    snowing_now = False
    for t, s in zip(times, snow_values):
        if t.startswith(today_str):
            snowfall_cm += s
            if s > 0:
                snowing_now = True

    inches = round(snowfall_cm / 2.54, 1)
    return inches, snowing_now, tz_name