import logging

from celery import shared_task

from notifier.services import dispatch_notification_event

logger = logging.getLogger(__name__)


@shared_task(bind=True)
def dispatch_notification_event_task(self, *, event_key: str, merchant_id: int, payload: dict | None = None) -> dict:
    results = dispatch_notification_event(
        event_key=event_key,
        merchant_id=merchant_id,
        payload=payload or {},
    )
    summary = {
        "task_id": self.request.id,
        "event_key": event_key,
        "merchant_id": merchant_id,
        "total_count": len(results),
        "sent_count": sum(1 for item in results if item.get("status") == "sent"),
        "failed_count": sum(1 for item in results if item.get("status") == "failed"),
        "results": results,
    }
    logger.info("[notifier.tasks] notification task finished: %s", summary)
    return summary