"""代理面路由（T-P0 骨架：/proxy/v1/models；主对话路由 T-P4 落地）。"""
from __future__ import annotations

from fastapi import APIRouter, Request

from gateway.proxy.config import ProxyConfig


def build_proxy_router(cfg: ProxyConfig, pool) -> APIRouter:
    """组装代理面路由（唯一组装点；pool 为 gateway.model_pool.PoolStore）。"""
    router = APIRouter(prefix="/proxy")

    @router.get("/v1/models", tags=["proxy"])
    async def list_models():
        """学生面：池内允许代理的模型列表（OpenAI /models 形状）。"""
        entries = pool.list().get("entries", [])
        names = [e["model"] for e in entries
                 if e.get("enabled") and e.get("backend") not in ("mock",)]
        # 去重保序
        seen, data = set(), []
        for n in names:
            if n not in seen:
                seen.add(n)
                data.append({"id": n, "object": "model", "owned_by": "campus-proxy"})
        return {"object": "list", "data": data}

    # /v1/chat/completions 与 /admin/* 在 T-P1/T-P4 追加
    return router