from fastapi import APIRouter, Depends
from fastapi.security import HTTPAuthorizationCredentials

from common.models.gmodel import UserInfo
from router.v1.validator.dependencies import IsValidAccessToken, RemoveNoneResponse, security
from services.chat_service import ChatService
from .chat_protocol import Req_ChatSend, Res_ChatInit, Res_ChatMessages, Res_ChatSend

router = APIRouter(prefix="/v1/negotiation", tags=["Negotiation Chat"], responses={404: {"description": "Not found"}})


@router.get(
    path="/sessions/{session_id}/chat/init",
    response_model=Res_ChatInit,
    summary="채팅 진입(상품·견적 메타)",
    description="채팅 화면 진입용. 상품/견적 정보 + 현재 세션 상태 + 마감 시각(타이머)을 반환한다. 소유(공급사) 검증.",
)
async def chat_init(
    session_id: str,
    user_info: UserInfo = Depends(IsValidAccessToken),
    credentials: HTTPAuthorizationCredentials = Depends(security),
    service: ChatService = Depends(),
):
    return RemoveNoneResponse(await service.init(user_info, credentials.credentials, session_id))


@router.get(
    path="/sessions/{session_id}/chat/messages",
    response_model=Res_ChatMessages,
    summary="대화 히스토리",
    description="세션의 대화 말풍선 목록(seq 오름차순). 비어 있고 협상중이면 오프닝 메시지를 생성해 포함한다.",
)
async def chat_messages(
    session_id: str,
    user_info: UserInfo = Depends(IsValidAccessToken),
    credentials: HTTPAuthorizationCredentials = Depends(security),
    service: ChatService = Depends(),
):
    return RemoveNoneResponse(await service.messages(user_info, credentials.credentials, session_id))


@router.post(
    path="/sessions/{session_id}/chat/send",
    response_model=Res_ChatSend,
    summary="협상 한 턴 전송",
    description="유저 입력을 보내고 agent 가 만든 봇 응답 1건을 반환한다(append-only). 종료 시 세션 입찰을 확정한다.",
)
async def chat_send(
    session_id: str,
    req: Req_ChatSend,
    user_info: UserInfo = Depends(IsValidAccessToken),
    credentials: HTTPAuthorizationCredentials = Depends(security),
    service: ChatService = Depends(),
):
    return RemoveNoneResponse(
        await service.send(user_info, credentials.credentials, session_id, req.user_input_type, req.user_input)
    )