"""# Summary

Vets persistence ports — integer-id document and repository factory.
"""
from mongo_ops import BaseDocument
from pydantic import Field

from domain.vets.models import Vet
from infra.db.repos import create_repo


class VetDocument(Vet, BaseDocument):
    """Persisted vet document. The integer ``id`` shadows the ObjectId."""

    id: int | None = Field(default=None, validation_alias="_id")


def create_vet_repo():
    """Create the vet repository selected by ``settings.repo_backend``.

    Returns:
        IntIdMemoryRepository | IntIdMongoRepository: Repository wired to the
        ``vets`` collection/store.
    """
    return create_repo("vets", VetDocument)