from typing import List, Dict, Any, Union

from smelog.factory import BoundLogger

from charts_messages.config import EVENT
from charts_messages.constants import Changelog
from charts_messages.handlers import get_event_handler
from charts_messages.utils import handle_diff_source_events


def handler(logger: BoundLogger, event: Union[List[Dict[str, Any]], Dict[str, Any]]):
    """Lambda job.

    Args:
        logger: Logger instance.
        event: List[Lambda event obj].

    Returns:
        JSON serializable response

    """
    event_handler = get_event_handler(Changelog(EVENT))

    logger.info(f"The main handler for EVENT: {EVENT} IS: {event_handler.__name__}")

    events = handle_diff_source_events(logger, event)

    event_handler(events, logger)