"""智谱 GLM 评测台评审：OpenAI 兼容端点 + ChatOpenAI 装配。"""

from __future__ import annotations

from langchain_openai import ChatOpenAI

from app.adapters.llm.openai_base_url import normalize_openai_compatible_base_url
from app.core.config import settings
from app.core.eval_judge_spec import EvalJudgeLlmSpec


def build_zhipu_eval_judge_spec(
    judge_model: str | None,
) -> EvalJudgeLlmSpec | None:
    """密钥缺失时返回 None。"""
    api_key = (settings.eval_judge_api_key or settings.zhipu_api_key or "").strip()
    if not api_key:
        return None
    want = (judge_model or "").strip()
    base = normalize_openai_compatible_base_url(
        settings.eval_judge_base_url,
        fallback="https://open.bigmodel.cn/api/paas/v4",
    )
    model = want or (settings.eval_judge_model or "glm-5")
    ctx = int(settings.eval_judge_context_window_tokens)
    llm_kw: dict = {
        "api_key": api_key,
        "base_url": base,
        "model": model,
        "temperature": settings.eval_judge_temperature,
    }
    return EvalJudgeLlmSpec(
        llm=ChatOpenAI(**llm_kw),
        provider="zhipu",
        resolved_model=model,
        context_window_tokens=ctx,
    )