import sys, inspect
from collections.abc import Callable


if sys.version_info >= (3, 10):

    def _robust_signature(factory: Callable) -> inspect.Signature | None:
        try:
            # Provide the locals so that `eval_str` will work even if the user
            # places the `Container` under a `if TYPE_CHECKING` block.
            sig = inspect.signature(
                factory,
                locals={"Container": object()},
                eval_str=True,
            )
        except Exception:  # noqa: BLE001
            # Retry without `eval_str` since if the annotation is "svcs.Container"
            # the eval will fail due to it not finding the `svcs` module
            try:
                sig = inspect.signature(factory)
            except Exception:  # noqa: BLE001
                return None

        return sig
else:

    def _robust_signature(factory: Callable) -> inspect.Signature | None:
        try:
            return inspect.signature(factory)
        except Exception:  # noqa: BLE001
            return None