"""Logging configuration."""

import logging
from logging.handlers import TimedRotatingFileHandler
from pathlib import Path


def setup_logging(log_dir: str, retention_days: int, level: str) -> None:
    Path(log_dir).mkdir(parents=True, exist_ok=True)
    formatter = logging.Formatter("%(asctime)s %(levelname)s [%(name)s] [%(threadName)s] %(message)s")

    file_handler = TimedRotatingFileHandler(
        filename=str(Path(log_dir) / "modbus-server.log"),
        when="midnight",
        interval=1,
        backupCount=retention_days,
        encoding="utf-8",
    )
    file_handler.setFormatter(formatter)

    console_handler = logging.StreamHandler()
    console_handler.setFormatter(formatter)

    root_logger = logging.getLogger()
    root_logger.setLevel(getattr(logging, level.upper(), logging.INFO))
    root_logger.handlers.clear()
    root_logger.addHandler(file_handler)
    root_logger.addHandler(console_handler)