from __future__ import annotations

import logging
from logging.handlers import RotatingFileHandler
from pathlib import Path


def setup_logging(log_dir: str) -> None:
    target_dir = Path(log_dir)
    target_dir.mkdir(parents=True, exist_ok=True)
    log_file = target_dir / "ota-agent.log"

    root_logger = logging.getLogger()
    root_logger.setLevel(logging.INFO)

    formatter = logging.Formatter(
        "%(asctime)s [%(levelname)s] %(name)s - %(message)s"
    )

    file_handler = RotatingFileHandler(
        log_file,
        maxBytes=2 * 1024 * 1024,
        backupCount=3,
        encoding="utf-8",
    )
    file_handler.setFormatter(formatter)

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

    root_logger.handlers.clear()
    root_logger.addHandler(file_handler)
    root_logger.addHandler(stream_handler)