app/logger_setup.py

import logging
import sys
from datetime import datetime
from pathlib import Path


def setup_logger(name: str = "bot", log_dir: str = "logs") -> logging.Logger:
    Path(log_dir).mkdir(exist_ok=True)
    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    log_file = Path(log_dir) / f"bot_{timestamp}.log"

    logger = logging.getLogger(name)
    logger.setLevel(logging.DEBUG)

    if logger.handlers:
        logger.handlers.clear()

    fh = logging.FileHandler(log_file, encoding="utf-8")
    fh.setLevel(logging.DEBUG)
    fh.setFormatter(logging.Formatter("%(asctime)s [%(levelname)-8s] %(message)s"))

    ch = logging.StreamHandler(sys.stdout)
    ch.setLevel(logging.INFO)
    ch.setFormatter(logging.Formatter("[%(levelname)s] %(message)s"))

    logger.addHandler(fh)
    logger.addHandler(ch)
    return logger