"""OpenAI/Chat Completions 兼容基址规范化（多供应商共用）。"""


def normalize_openai_compatible_base_url(raw: str, *, fallback: str) -> str:
    base = (raw or "").strip().rstrip("/") or fallback
    for suffix in ("/v1/chat/completions", "/v1"):
        if base.endswith(suffix):
            base = base[: -len(suffix)]
    return base