import os
import uuid

from fastapi import Depends
from fastapi_users import UUIDIDMixin, BaseUserManager
from fastapi_users.authentication import AuthenticationBackend, BearerTransport
from fastapi_users.authentication.strategy import AccessTokenDatabase, DatabaseStrategy
from fastapi_users_db_beanie.access_token import BeanieBaseAccessTokenDocument, BeanieAccessTokenDatabase
from httpx_oauth.clients.google import GoogleOAuth2
from fastapi_users.fastapi_users import get_oauth_router

from hub.user import User, get_user_db


SECRET = os.getenv("FASTAPI_USERS_SECRET")
google_oauth_client = GoogleOAuth2(os.getenv("GOOGLE_CLIENT_ID"), os.getenv("GOOGLE_CLIENT_SECRET"))


TOKEN_LIFETIME = 3600

bearer_transport = BearerTransport(tokenUrl="auth/login")


class AccessToken(BeanieBaseAccessTokenDocument):
    pass

async def get_access_token_db():
    yield BeanieAccessTokenDatabase(AccessToken)


def get_database_strategy(
    access_token_db: AccessTokenDatabase[AccessToken] = Depends(get_access_token_db),
) -> DatabaseStrategy:
    return DatabaseStrategy(access_token_db, lifetime_seconds=TOKEN_LIFETIME)


class UserManager(UUIDIDMixin, BaseUserManager[User, uuid.UUID]):
    reset_password_token_secret = SECRET
    verification_token_secret = SECRET


async def get_user_manager(user_db=Depends(get_user_db)):
    yield UserManager(user_db)


auth_backend = AuthenticationBackend(
    name="db",
    transport=bearer_transport,
    get_strategy=get_database_strategy,
)

oauth_router = get_oauth_router(google_oauth_client, auth_backend, get_user_manager, SECRET)