"""网抑云 —— 业务逻辑(Service 层)。"""

from __future__ import annotations

import re

import httpx

from .. import config as _cfg


async def fetch_hitokoto() -> str | None:
    """带超时与重试地拉取网抑云热评文本;多次失败后抛出最后一次异常。"""
    last_err: Exception | None = None
    for _ in range(3):
        try:
            async with httpx.AsyncClient(timeout=10.0) as client:
                response = await client.get(_cfg.API_URL)
            response.raise_for_status()
            match = re.search(r"<p>(.*?)</p>", response.text)
            if match:
                return match.group(1)
            return None
        except Exception as e:  # noqa: BLE001
            last_err = e
    if last_err:
        raise last_err
    return None