import urllib.request
import urllib.parse
from typing import Optional
from app.config import settings

def get_current_weather() -> Optional[str]:
    """Fetch current weather report from wttr.in in Russian."""
    city = urllib.parse.quote(settings.WEATHER_CITY) if settings.WEATHER_CITY else ""
    url = f"https://wttr.in/{city}?format=%C,+%t&lang=ru"
    try:
        req = urllib.request.Request(
            url,
            headers={"User-Agent": "curl/7.88.1"}
        )
        with urllib.request.urlopen(req, timeout=3.5) as resp:
            text = resp.read().decode("utf-8").strip()
            # Basic validation
            if text and not text.startswith("<") and len(text) < 60:
                return text
    except Exception as e:
        print(f"[RadioWeather] Warning: unable to fetch weather: {e}")
    return None