"""Serving backends for the FormScout judge/classifier VLM."""
from __future__ import annotations


def get_vlm_client():
    """Return the VLM client for the resolved judge backend.

    transformers (in-process, ZeroGPU) on a Space; llama-server locally. Falls
    back to the llama.cpp client if the transformers backend can't be imported.
    """
    from formscout import config

    if config.resolve_judge_backend() == "transformers":
        try:
            from formscout.serving.transformers_vlm import TransformersVLMClient
            return TransformersVLMClient()
        except Exception:
            pass
    from formscout.serving.llama_cpp import LlamaCppClient
    return LlamaCppClient(port=config.LLAMA_CPP_PORT_VLM)