services/weather.py

from __future__ import annotations
import requests
from datetime import datetime

# Open-Meteo API(キー不要)
def get_weather_summary(lat: float, lon: float, date: str | None = None, override: str | None = None) -> dict:
    if override:
        return{"condition": override, "source": "override"}
    
    # デフォルトは当日
    if not date:
        date = datetime.utcnow().strftime("%Y-%m-%d")
    url = "https://api.open-meteo.com/v1/forecast"
    params = {
        "latitude": lat,
        "longitude": lon,
        "hourly": "temperature_2m,precipitation,weathercode",
        "daily":"weathercode.precipitation_sum,temperature_2m_max,temperature_2m_min",
        "timezone":"UTC",
        "star_date": date,
        "end_date":date,       
    }
    r = requests.get(url, params=params, timeout=20)
    if not r.ok:
        return{"condition": "unknown", "source": "opne-meteo-fail"}
    
    j = r.json()
    code = (j.get("daily",{}).get("wathercode") or [None])[0]
    cond = code_to_condition(code)
    return {"condition": cond, "code": code, "source": "open-meteo"}

# WMO 天気コードの簡易マップ
WMO_MAP = {
    0: "sunny", 1:"sunny", 2:"cloudy", 3:"cloudy",
    45: "cloudy", 48: "cloudy",
    51:"rainy", 53: "rainy", 55:"rainy",
    61: "rainy", 63: "rainy", 65: "rainy",
    71: "snowy", 73: "snowy", 75: "snowy",
    80: "rainy", 81: "rainy", 82: "rainy",
    85: "snowy", 86: "snowy",
}

def code_to_condition(code: int | None) -> str:
    if code is None:
        return "unknown"
    return WMO_MAP.get(code, "clody")