from smelog.factory import BoundLogger

from juno_monitoring.clients import service


def handler(logger: BoundLogger):
    """Lambda job.

    Args:
        logger: Logger instance.

    Returns:
        JSON serializable response

    """
    previous_date = service.apollo.get_last_date()
    current_date = service.dsp.get_juno_date()
    logger.debug(f"previous {previous_date}, current {current_date}")

    if not previous_date or current_date > previous_date:
        service.user_data.post_event(previous_date, current_date)
        logger.debug(f"previous {previous_date}, current {current_date} event sent")
        service.apollo.set_last_date(current_date)
    else:
        logger.debug(f"previous {previous_date}, current {current_date} up-to-date")

    return {
        "previous_date": previous_date.isoformat() if previous_date else None, "current_date": current_date.isoformat()
    }