"""自然语言查询 API（R4/R20）。"""

from __future__ import annotations

from fastapi import APIRouter, Depends
from sqlalchemy.orm import Session

from app.api.schemas import NLQRequest, NLQResponse
from app.db import get_session
from app.nlq import service as nlq

router = APIRouter(prefix="/nlq", tags=["nlq"])


@router.post("", response_model=NLQResponse)
def ask(req: NLQRequest, session: Session = Depends(get_session)) -> NLQResponse:
    ans = nlq.ask(req.question, session=session)
    return NLQResponse(
        question=ans.question,
        answer=ans.answer,
        provider=ans.provider,
        model=ans.model,
        egress=ans.egress,
    )