"""
MAX Mini App (WebApp) auth endpoint.

/api/v1/max/auth:
- Принимает init_data от MAX Bridge (window.WebApp.initData)
- Валидирует init_data и извлекает данные пользователя MAX
- Проксирует max_user_id в n8n для получения unified_id/контакта
- Создаёт сессию в Redis (аналогично Telegram — без SMS)
"""

import logging
from typing import Optional

from fastapi import APIRouter, HTTPException
from fastapi.encoders import jsonable_encoder
from pydantic import BaseModel

from ..services.max_auth import extract_max_user, MaxAuthError
from ..config import settings
from . import n8n_proxy
from . import session as session_api

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/api/v1/max", tags=["MAX"])


class MaxAuthRequest(BaseModel):
    init_data: str
    session_token: Optional[str] = None
    phone: Optional[str] = None


class MaxAuthResponse(BaseModel):
    success: bool
    session_token: Optional[str] = None
    unified_id: Optional[str] = None
    contact_id: Optional[str] = None
    phone: Optional[str] = None
    has_drafts: Optional[bool] = None
    need_contact: Optional[bool] = None


def _generate_session_token() -> str:
    import uuid
    return f"sess-{uuid.uuid4()}"


@router.post("/auth", response_model=MaxAuthResponse)
async def max_auth(request: MaxAuthRequest):
    """
    Авторизация пользователя через MAX WebApp (Mini App).
    """
    init_data = request.init_data or ""
    phone = (request.phone or "").strip()
    logger.info(
        "[MAX] POST /api/v1/max/auth: init_data длина=%s, phone=%s, session_token=%s",
        len(init_data),
        bool(phone),
        bool(request.session_token),
    )
    if not init_data:
        logger.warning("[MAX] init_data пустой")
        raise HTTPException(status_code=400, detail="init_data обязателен")

    bot_configured = bool((getattr(settings, "max_bot_token", None) or "").strip())
    webhook_configured = bool((getattr(settings, "n8n_max_auth_webhook", None) or "").strip())
    logger.info("[MAX] Конфиг: MAX_BOT_TOKEN=%s, N8N_MAX_AUTH_WEBHOOK=%s", bot_configured, webhook_configured)

    try:
        max_user = extract_max_user(request.init_data)
    except MaxAuthError as e:
        logger.warning("[MAX] Ошибка валидации initData: %s", e)
        raise HTTPException(status_code=400, detail=str(e))

    max_user_id = max_user["max_user_id"]
    logger.info("[MAX] MAX user валиден: id=%s, username=%s", max_user_id, max_user.get("username"))

    session_token = request.session_token or _generate_session_token()

    n8n_payload = {
        "max_user_id": max_user_id,
        "username": max_user.get("username"),
        "first_name": max_user.get("first_name"),
        "last_name": max_user.get("last_name"),
        "session_token": session_token,
        "form_id": "ticket_form",
        "init_data": request.init_data,
    }
    if phone:
        n8n_payload["phone"] = phone

    logger.info("[MAX] Валидация OK → вызов n8n webhook (max_user_id=%s)", max_user_id)
    try:
        class _DummyRequest:
            def __init__(self, payload: dict):
                self._payload = payload
            async def json(self):
                return self._payload

        n8n_response = await n8n_proxy.proxy_max_auth(_DummyRequest(n8n_payload))  # type: ignore[arg-type]
        n8n_data = jsonable_encoder(n8n_response)
    except HTTPException:
        raise
    except Exception as e:
        logger.exception("[MAX] Ошибка вызова n8n MAX auth webhook: %s", e)
        raise HTTPException(status_code=500, detail=f"Ошибка обращения к n8n: {str(e)}")

    logger.info("[MAX] n8n ответ (ключи): %s", list(n8n_data.keys()) if isinstance(n8n_data, dict) else type(n8n_data).__name__)
    _result = n8n_data.get("result")
    _result_dict = _result if isinstance(_result, dict) else {}
    _raw = (
        n8n_data.get("need_contact")
        or _result_dict.get("need_contact")
        or n8n_data.get("needContact")
        or _result_dict.get("needContact")
    )
    need_contact = _raw is True or _raw == 1 or (isinstance(_raw, str) and str(_raw).strip().lower() in ("true", "1"))
    if need_contact:
        logger.info("[MAX] n8n: need_contact=true — возвращаем need_contact, фронт закроет приложение")
        return MaxAuthResponse(success=False, need_contact=True)

    unified_id = n8n_data.get("unified_id") or _result_dict.get("unified_id") or n8n_data.get("unifiedId")
    contact_id = n8n_data.get("contact_id") or _result_dict.get("contact_id") or n8n_data.get("contactId")
    phone_res = n8n_data.get("phone") or _result_dict.get("phone")
    has_drafts = n8n_data.get("has_drafts") or _result_dict.get("has_drafts")

    if not unified_id:
        logger.info("[MAX] n8n не вернул unified_id (юзер не в базе) — возвращаем need_contact=true. Ответ: %s", n8n_data)
        return MaxAuthResponse(success=False, need_contact=True)

    session_request = session_api.SessionCreateRequest(
        session_token=session_token,
        unified_id=unified_id,
        phone=phone_res or phone or "",
        contact_id=contact_id or "",
        ttl_hours=24,
        chat_id=str(max_user_id) if max_user_id else None,
    )

    try:
        await session_api.create_session(session_request)
    except HTTPException:
        raise
    except Exception as e:
        logger.exception("[MAX] Ошибка создания сессии в Redis")
        raise HTTPException(status_code=500, detail=f"Ошибка создания сессии: {str(e)}")

    return MaxAuthResponse(
        success=True,
        session_token=session_token,
        unified_id=unified_id,
        contact_id=contact_id,
        phone=phone_res or phone,
        has_drafts=has_drafts,
    )