import logging
import os
import sys
from logging.handlers import TimedRotatingFileHandler

from indexer.config import LOG_LEVEL, LOG_DIR


def setup_logging() -> logging.Logger:
    os.makedirs(LOG_DIR, exist_ok=True)

    level = getattr(logging, LOG_LEVEL.upper(), logging.INFO)
    fmt = logging.Formatter(
        "%(asctime)s [%(levelname)-8s] %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
    )

    file_handler = TimedRotatingFileHandler(
        os.path.join(LOG_DIR, "backup.log"),
        when="midnight",
        backupCount=90,
        encoding="utf-8",
    )
    file_handler.setFormatter(fmt)

    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setFormatter(fmt)

    logging.root.setLevel(level)
    logging.root.handlers.clear()
    logging.root.addHandler(file_handler)
    logging.root.addHandler(console_handler)

    return logging.getLogger("backup")