from pathlib import Path

from loguru import logger


_SCHEDULER_LOGGER_CONFIGURED = False


def get_scheduler_logger():
    """Return scheduler logger with daily file sink."""
    global _SCHEDULER_LOGGER_CONFIGURED
    if not _SCHEDULER_LOGGER_CONFIGURED:
        log_dir = Path("logs/scheduler")
        log_dir.mkdir(parents=True, exist_ok=True)
        logger.add(
            str(log_dir / "scheduler_{time:YYYY-MM-DD}.log"),
            level="INFO",
            rotation="00:00",
            retention="30 days",
            encoding="utf-8",
            enqueue=True,
            backtrace=True,
            diagnose=False,
        )
        _SCHEDULER_LOGGER_CONFIGURED = True
    return logger