from __future__ import annotations import logging from typing import Any, Optional from fastapi import APIRouter, Depends, HTTPException, Query, Security, status from sqlalchemy import select from sqlalchemy.ext.asyncio import AsyncSession from sqlalchemy.orm import selectinload from app.config import settings from app.database.crud.server_squad import get_random_trial_squad_uuid from app.database.crud.subscription import ( add_subscription_devices, add_subscription_squad, add_subscription_traffic, create_paid_subscription, create_trial_subscription, extend_subscription, get_subscription_by_user_id, replace_subscription, remove_subscription_squad, ) from app.database.models import Subscription, SubscriptionStatus from ..dependencies import get_db_session, require_api_token from ..schemas.subscriptions import ( SubscriptionCreateRequest, SubscriptionDevicesRequest, SubscriptionExtendRequest, SubscriptionResponse, SubscriptionSquadRequest, SubscriptionTrafficRequest, ) logger = logging.getLogger(__name__) router = APIRouter() def _serialize_subscription(subscription: Subscription) -> SubscriptionResponse: return SubscriptionResponse( id=subscription.id, user_id=subscription.user_id, status=subscription.status, actual_status=subscription.actual_status, is_trial=subscription.is_trial, start_date=subscription.start_date, end_date=subscription.end_date, traffic_limit_gb=subscription.traffic_limit_gb, traffic_used_gb=subscription.traffic_used_gb, device_limit=subscription.device_limit, autopay_enabled=subscription.autopay_enabled, autopay_days_before=subscription.autopay_days_before, subscription_url=subscription.subscription_url, subscription_crypto_link=subscription.subscription_crypto_link, connected_squads=list(subscription.connected_squads or []), created_at=subscription.created_at, updated_at=subscription.updated_at, ) async def _choose_trial_squads( db: AsyncSession, requested_squad_uuid: Optional[str], fallback_squads: list[str] ) -> list[str]: if requested_squad_uuid: return [requested_squad_uuid] if fallback_squads: return fallback_squads try: squad_uuid = await get_random_trial_squad_uuid(db) except Exception as error: logger.error("Failed to select trial squad: %s", error) squad_uuid = None if not squad_uuid: return [] logger.debug("Selected trial squad %s for subscription replacement", squad_uuid) return [squad_uuid] async def _get_subscription(db: AsyncSession, subscription_id: int) -> Subscription: result = await db.execute( select(Subscription) .options(selectinload(Subscription.user)) .where(Subscription.id == subscription_id) ) subscription = result.scalar_one_or_none() if not subscription: raise HTTPException(status.HTTP_404_NOT_FOUND, "Subscription not found") return subscription @router.get("", response_model=list[SubscriptionResponse]) async def list_subscriptions( _: Any = Security(require_api_token), db: AsyncSession = Depends(get_db_session), limit: int = Query(50, ge=1, le=200), offset: int = Query(0, ge=0), status_filter: Optional[SubscriptionStatus] = Query(default=None, alias="status"), user_id: Optional[int] = Query(default=None), is_trial: Optional[bool] = Query(default=None), ) -> list[SubscriptionResponse]: query = select(Subscription).options(selectinload(Subscription.user)) if status_filter: query = query.where(Subscription.status == status_filter.value) if user_id: query = query.where(Subscription.user_id == user_id) if is_trial is not None: query = query.where(Subscription.is_trial.is_(is_trial)) query = query.order_by(Subscription.created_at.desc()).offset(offset).limit(limit) result = await db.execute(query) subscriptions = result.scalars().all() return [_serialize_subscription(sub) for sub in subscriptions] @router.get("/{subscription_id}", response_model=SubscriptionResponse) async def get_subscription( subscription_id: int, _: Any = Security(require_api_token), db: AsyncSession = Depends(get_db_session), ) -> SubscriptionResponse: subscription = await _get_subscription(db, subscription_id) return _serialize_subscription(subscription) @router.post("", response_model=SubscriptionResponse, status_code=status.HTTP_201_CREATED) async def create_subscription( payload: SubscriptionCreateRequest, _: Any = Security(require_api_token), db: AsyncSession = Depends(get_db_session), ) -> SubscriptionResponse: existing = await get_subscription_by_user_id(db, payload.user_id) if existing and not payload.replace_existing: raise HTTPException(status.HTTP_400_BAD_REQUEST, "User already has a subscription") forced_devices = None if not settings.is_devices_selection_enabled(): forced_devices = settings.get_disabled_mode_device_limit() if payload.is_trial: trial_device_limit = payload.device_limit if trial_device_limit is None: trial_device_limit = forced_devices duration_days = payload.duration_days or settings.TRIAL_DURATION_DAYS traffic_limit_gb = payload.traffic_limit_gb or settings.TRIAL_TRAFFIC_LIMIT_GB if existing: connected_squads = await _choose_trial_squads( db, payload.squad_uuid, list(existing.connected_squads or []) ) subscription = await replace_subscription( db, existing, duration_days=duration_days, traffic_limit_gb=traffic_limit_gb, device_limit=( trial_device_limit if trial_device_limit is not None else settings.TRIAL_DEVICE_LIMIT ), connected_squads=connected_squads, is_trial=True, update_server_counters=True, ) else: subscription = await create_trial_subscription( db, user_id=payload.user_id, duration_days=duration_days, traffic_limit_gb=traffic_limit_gb, device_limit=trial_device_limit, squad_uuid=payload.squad_uuid, ) else: if payload.duration_days is None: raise HTTPException(status.HTTP_400_BAD_REQUEST, "duration_days is required for paid subscriptions") device_limit = payload.device_limit if device_limit is None: if forced_devices is not None: device_limit = forced_devices else: device_limit = settings.DEFAULT_DEVICE_LIMIT if existing: subscription = await replace_subscription( db, existing, duration_days=payload.duration_days, traffic_limit_gb=payload.traffic_limit_gb or settings.DEFAULT_TRAFFIC_LIMIT_GB, device_limit=device_limit, connected_squads=payload.connected_squads or [], is_trial=False, update_server_counters=True, ) else: subscription = await create_paid_subscription( db, user_id=payload.user_id, duration_days=payload.duration_days, traffic_limit_gb=payload.traffic_limit_gb or settings.DEFAULT_TRAFFIC_LIMIT_GB, device_limit=device_limit, connected_squads=payload.connected_squads or [], update_server_counters=True, ) subscription = await _get_subscription(db, subscription.id) return _serialize_subscription(subscription) @router.post("/{subscription_id}/extend", response_model=SubscriptionResponse) async def extend_subscription_endpoint( subscription_id: int, payload: SubscriptionExtendRequest, _: Any = Security(require_api_token), db: AsyncSession = Depends(get_db_session), ) -> SubscriptionResponse: subscription = await _get_subscription(db, subscription_id) subscription = await extend_subscription(db, subscription, payload.days) subscription = await _get_subscription(db, subscription.id) return _serialize_subscription(subscription) @router.post("/{subscription_id}/traffic", response_model=SubscriptionResponse) async def add_subscription_traffic_endpoint( subscription_id: int, payload: SubscriptionTrafficRequest, _: Any = Security(require_api_token), db: AsyncSession = Depends(get_db_session), ) -> SubscriptionResponse: subscription = await _get_subscription(db, subscription_id) subscription = await add_subscription_traffic(db, subscription, payload.gb) subscription = await _get_subscription(db, subscription.id) return _serialize_subscription(subscription) @router.post("/{subscription_id}/devices", response_model=SubscriptionResponse) async def add_subscription_devices_endpoint( subscription_id: int, payload: SubscriptionDevicesRequest, _: Any = Security(require_api_token), db: AsyncSession = Depends(get_db_session), ) -> SubscriptionResponse: subscription = await _get_subscription(db, subscription_id) subscription = await add_subscription_devices(db, subscription, payload.devices) subscription = await _get_subscription(db, subscription.id) return _serialize_subscription(subscription) @router.post("/{subscription_id}/squads", response_model=SubscriptionResponse) async def add_subscription_squad_endpoint( subscription_id: int, payload: SubscriptionSquadRequest, _: Any = Security(require_api_token), db: AsyncSession = Depends(get_db_session), ) -> SubscriptionResponse: if not payload.squad_uuid: raise HTTPException(status.HTTP_400_BAD_REQUEST, "squad_uuid is required") subscription = await _get_subscription(db, subscription_id) subscription = await add_subscription_squad(db, subscription, payload.squad_uuid) subscription = await _get_subscription(db, subscription.id) return _serialize_subscription(subscription) @router.delete("/{subscription_id}/squads/{squad_uuid}", response_model=SubscriptionResponse) async def remove_subscription_squad_endpoint( subscription_id: int, squad_uuid: str, _: Any = Security(require_api_token), db: AsyncSession = Depends(get_db_session), ) -> SubscriptionResponse: subscription = await _get_subscription(db, subscription_id) subscription = await remove_subscription_squad(db, subscription, squad_uuid) subscription = await _get_subscription(db, subscription.id) return _serialize_subscription(subscription)