from fastapi import APIRouter

from app.schemas.chat import ChatRequest, ChatResponse

router = APIRouter(tags=["chat"])


@router.post("/chat", response_model=ChatResponse)
def chat(payload: ChatRequest) -> ChatResponse:
    # TODO: retrieval -> context assembly -> LLM -> evidence/source checks
    return ChatResponse(
        answer=f"已收到问题：{payload.question}。当前为基础壳子，尚未接入知识检索或大语言模型。",
        status="stub",
        sources=[],
    )