"""카카오톡 채널 연결 — 빌더에서 코드를 받아 채널에 한 번 입력한다."""

from uuid import UUID

from fastapi import APIRouter, Depends, HTTPException, Response

from common.models.gmodel import UserInfo
from router.v1.validator.dependencies import IsValidAccessToken
from services import kakao_link_service as service
from services.kakao_link_service import KakaoLinkError

router = APIRouter(prefix="/v1/agent/kakao", tags=["Agent"])


def private_response(response: Response):
    """코드가 오가는 응답이다 — 캐시·리퍼러·색인을 모두 막는다(social 라우터와 같은 규약)."""
    response.headers["Cache-Control"] = "no-store"
    response.headers["Referrer-Policy"] = "no-referrer"
    response.headers["X-Robots-Tag"] = "noindex, nofollow"


@router.get("/link")
async def link_state(response: Response, user: UserInfo = Depends(IsValidAccessToken)):
    """연결 상태."""
    private_response(response)
    return await service.state(UUID(user.user_id))


@router.post("/link/code")
async def issue_code(response: Response, user: UserInfo = Depends(IsValidAccessToken)):
    """일회용 코드를 낸다."""
    private_response(response)
    try:
        return await service.issue_code(UUID(user.user_id))
    except KakaoLinkError as ex:
        raise HTTPException(409, str(ex)) from ex


@router.post("/link/disconnect")
async def disconnect(response: Response, user: UserInfo = Depends(IsValidAccessToken)):
    private_response(response)
    try:
        await service.disconnect(UUID(user.user_id))
    except KakaoLinkError as ex:
        raise HTTPException(409, str(ex)) from ex
    return {"disconnected": True}