"""全局日志：统一格式与级别，供各模块 get_logger 使用。"""

from __future__ import annotations

import logging
import sys

from ..config import get_settings

_configured = False


def setup_logging() -> None:
    """按 Settings.log_level 初始化根日志（幂等）。"""
    global _configured
    if _configured:
        return

    level = getattr(logging, get_settings().log_level.upper(), logging.INFO)
    logging.basicConfig(
        level=level,
        format="%(asctime)s | %(levelname)s | %(name)s | %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
        stream=sys.stdout,
        force=True,
    )
    _configured = True


def get_logger(name: str = "app") -> logging.Logger:
    if not _configured:
        setup_logging()
    return logging.getLogger(name)