"""DMS plugin contract — public interface for cross-plugin access."""

from __future__ import annotations

from app.plugins.builtins.contracts import get_contract_registry
from app.plugins.builtins.dms.models import File as DmsFile
from app.plugins.builtins.dms.models import Folder


class DmsContract:
    """Public contract for the DMS plugin."""

    contract_name = "dms"

    DmsFile = DmsFile
    Folder = Folder

    @classmethod
    def get_function(cls, name: str):
        """Return a callable exposed by this contract, or None if absent."""
        return getattr(cls, name, None)


# ─── self-registration ───

_contract = DmsContract()
get_contract_registry().register("dms", _contract)

# Backward-compatible local accessor
_contract_instance: DmsContract | None = None


def get_contract() -> DmsContract:
    global _contract_instance
    if _contract_instance is None:
        _contract_instance = DmsContract()
    return _contract_instance


__all__ = ["DmsContract", "DmsFile", "Folder"]