import asyncio

import requests

CAT_API_URL = "https://api.thecatapi.com/v1/images/search"

_session = requests.Session()


async def fetch_cat() -> str | None:
    """Получить URL случайного котика. Вернуть None при ошибке."""
    try:
        response = await asyncio.to_thread(_session.get, CAT_API_URL, timeout=10)
        response.raise_for_status()
        data = response.json()
        return data[0]["url"]
    except requests.exceptions.RequestException:
        return None