from typing import Optional

from fastapi import Depends, Request
from fastapi_users import BaseUserManager, FastAPIUsers, IntegerIDMixin
from fastapi_users.authentication import (
    AuthenticationBackend,
    BearerTransport,
    JWTStrategy,
    OAuth2PasswordRequestForm,
)
from fastapi_users.db import SQLAlchemyUserDatabase
from sqlalchemy.ext.asyncio import AsyncSession
from authlib.integrations.starlette_client import OAuth
from starlette.config import Config
from starlette.middleware.sessions import SessionMiddleware

from .database import get_async_session
from .models import User
from .config import settings

# OAuth2 configuration
config = Config('.env')
oauth = OAuth(config)

# Google OAuth2 setup
oauth.register(
    name='google',
    server_metadata_url='https://accounts.google.com/.well-known/openid-configuration',
    client_kwargs={
        'scope': 'openid email profile',
        'redirect_uri': settings.GOOGLE_REDIRECT_URI
    }
)

# Apple OAuth2 setup
oauth.register(
    name='apple',
    server_metadata_url='https://appleid.apple.com/.well-known/openid-configuration',
    client_kwargs={
        'scope': 'openid email name',
        'redirect_uri': settings.APPLE_REDIRECT_URI
    }
)

class UserManager(IntegerIDMixin, BaseUserManager[User, int]):
    reset_password_token_secret = settings.SECRET_KEY
    verification_token_secret = settings.SECRET_KEY

    async def on_after_register(self, user: User, request: Optional[Request] = None):
        print(f"User {user.id} has registered.")

    async def on_after_forgot_password(
        self, user: User, token: str, request: Optional[Request] = None
    ):
        print(f"User {user.id} has forgot their password. Reset token: {token}")

    async def on_after_request_verify(
        self, user: User, token: str, request: Optional[Request] = None
    ):
        print(f"Verification requested for user {user.id}. Verification token: {token}")

    async def on_after_login(
        self, user: User, request: Optional[Request] = None
    ):
        print(f"User {user.id} has logged in.")

async def get_user_db(session: AsyncSession = Depends(get_async_session)):
    yield SQLAlchemyUserDatabase(session, User)

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

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

def get_jwt_strategy() -> JWTStrategy:
    return JWTStrategy(secret=settings.SECRET_KEY, lifetime_seconds=3600)

auth_backend = AuthenticationBackend(
    name="jwt",
    transport=bearer_transport,
    get_strategy=get_jwt_strategy,
)

fastapi_users = FastAPIUsers[User, int](
    get_user_manager,
    [auth_backend],
)

current_active_user = fastapi_users.current_user(active=True)
current_superuser = fastapi_users.current_user(active=True, superuser=True)