import logging

from defence360agent.contracts.config import ConfigValidationError, Merger
from defence360agent.contracts.messages import MessageType
from defence360agent.contracts.plugins import MessageSink, expect

logger = logging.getLogger(__name__)


class ConfigMerger(MessageSink):
    PROCESSING_ORDER = MessageSink.ProcessingOrder.PRE_PROCESS_MESSAGE

    def __init__(self):
        self.loop = None

    async def create_sink(self, loop):
        self.loop = loop

    @expect(MessageType.ConfigUpdate)
    async def update_merged_config(self, message):
        try:
            Merger.update_merged_config()
        except ConfigValidationError as err:
            logger.error("Config is invalid. Will not update: %s", err)
        finally:
            if event := message.get("event"):
                event.set()