from __future__ import annotations
import logging
from pathlib import Path
from typing import Optional

def setup_logging(log_level: str, log_file: Optional[Path]) -> logging.Logger:
    logger = logging.getLogger("jr_einvoice")
    logger.setLevel(logging.DEBUG)

    if list(logger.handlers):
        return logger

    fmt = logging.Formatter(
        fmt="%(asctime)s.%(msecs)03d %(levelname)s [%(name)s] %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
    )

    ch = logging.StreamHandler()
    ch.setLevel(getattr(logging, log_level.upper(), logging.INFO))
    ch.setFormatter(fmt)
    logger.addHandler(ch)

    if log_file is not None:
        log_file.parent.mkdir(parents=True, exist_ok=True)
        fh = logging.FileHandler(log_file, encoding="utf-8")
        fh.setLevel(logging.DEBUG)
        fh.setFormatter(fmt)
        logger.addHandler(fh)

    return logger