from socket import gethostname
from typing import Any

from app.core.constants import ActorValue
from app.core.database import SessionLocal
from app.tasks.app import celery_app, settings


@celery_app.task(name="events.dispatch_pending")
def dispatch_pending_events(
    limit: int | None = None,
    actor: str = ActorValue.WORKER,
) -> list[dict[str, Any]]:
    from app.modules.events.services import EventService
    from app.modules.observability.constants import HeartbeatComponent
    from app.modules.observability.service import ObservabilityService

    db = SessionLocal()
    try:
        ObservabilityService(db).record_heartbeat(
            component=HeartbeatComponent.WORKER,
            instance_id=gethostname(),
            actor=actor,
        )
        return EventService(db).dispatch_pending(
            limit=limit or settings.event_dispatch_batch_size,
            worker_id=f"{actor}:{gethostname()}",
        )
    finally:
        db.close()