"""Singleton registry for integration service."""

from __future__ import annotations

from .schemas import IntegrationConfig
from .service import IntegrationService
from .shared import Optional

_integration_service = None


def get_integration_service(
    config: Optional[IntegrationConfig] = None,
    event_bus=None,
) -> IntegrationService:
    """Get singleton integration service instance."""
    global _integration_service
    if _integration_service is None:
        _integration_service = IntegrationService(config, event_bus)
    return _integration_service