"""IDM route dependencies; resolve the current optional Core capability per call."""

from fastapi import HTTPException, status

from govoplan_core.core.identity import CAPABILITY_IDENTITY_DIRECTORY, IdentityDirectory


def require_identity_directory(registry: object | None) -> IdentityDirectory:
    if registry is None or not registry.has_capability(CAPABILITY_IDENTITY_DIRECTORY):
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Identity directory is unavailable",
        )
    capability = registry.require_capability(CAPABILITY_IDENTITY_DIRECTORY)
    if not isinstance(capability, IdentityDirectory):
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"Invalid capability: {CAPABILITY_IDENTITY_DIRECTORY}",
        )
    return capability