from fastapi import APIRouter, HTTPException, Depends
from pydantic import BaseModel
from app.services.db_manager import DatabaseManager
from instance.configdb import get_database_manager
from uuid import UUID
import logging
from sqlalchemy.exc import SQLAlchemyError

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

router = APIRouter()


class BuySubscriptionRequest(BaseModel):
    telegram_id: int
    plan_id: str

class SubscriptionResponse(BaseModel):
    id: str
    plan: str
    vpn_server_id: str
    expiry_date: str
    created_at: str
    updated_at: str

# Эндпоинт для покупки подписки
@router.post("/subscription/buy", response_model=dict)
async def buy_subscription(
    request_data: BuySubscriptionRequest, 
    database_manager: DatabaseManager = Depends(get_database_manager)
):
    """
    Покупка подписки.
    """
    try:
        result = await database_manager.buy_sub(request_data.telegram_id, request_data.plan_id)

        if result == "ERROR":
            raise HTTPException(status_code=500, detail="Failed to buy subscription")
        elif result == "INSUFFICIENT_FUNDS":
            raise HTTPException(status_code=400, detail="Insufficient funds")
        elif result == "TARIFF_NOT_FOUND":
            raise HTTPException(status_code=400, detail="Tariff not found")
        elif result == "ACTIVE_SUBSCRIPTION_EXISTS":
            raise HTTPException(status_code=400, detail="User already had subscription",)

        return {"message": "Subscription purchased successfully"}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))


# Эндпоинт для получения последней подписки
@router.get("/subscription/{user_id}/last", response_model=SubscriptionResponse)
async def last_subscription(user_id: UUID, database_manager: DatabaseManager = Depends(get_database_manager)):
    logger.info(f"Получение последней подписки для пользователя: {user_id}")
    try:
        sub = await database_manager.last_subscription(user_id)
        if sub is None:
            logger.warning(f"Подписки для пользователя {user_id} не найдены")
            raise HTTPException(status_code=404, detail="No subscriptions found")
        return {
            "id": sub.id,
            "plan": sub.plan,
            "vpn_server_id": sub.vpn_server_id,
            "expiry_date": sub.expiry_date.isoformat(),
            "created_at": sub.created_at.isoformat(),
            "updated_at": sub.updated_at.isoformat(),
        }
    except SQLAlchemyError as e:
        logger.error(f"Ошибка базы данных при получении подписки для пользователя {user_id}: {e}")
        raise HTTPException(status_code=500, detail="Database error")
    except Exception as e:
        logger.error(f"Неожиданная ошибка: {e}")
        raise HTTPException(status_code=500, detail=str(e))