utils/logger.py

"""
Centralised logging configuration for BioLitAI-X.
Import get_logger(name) in every module instead of logging.getLogger directly.
"""

import logging
import sys
from pathlib import Path

from config import LOG_LEVEL, LOG_DIR


def get_logger(name: str) -> logging.Logger:
    logger = logging.getLogger(name)
    if logger.handlers:
        return logger

    logger.setLevel(getattr(logging, LOG_LEVEL.upper(), logging.INFO))

    fmt = logging.Formatter(
        "%(asctime)s  %(levelname)-8s  %(name)s  %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
    )

    ch = logging.StreamHandler(sys.stdout)
    ch.setFormatter(fmt)
    logger.addHandler(ch)

    try:
        fh = logging.FileHandler(Path(LOG_DIR) / "biolita.log", encoding="utf-8")
        fh.setFormatter(fmt)
        logger.addHandler(fh)
    except Exception:
        pass

    return logger