app/users.py

import uuid
import os
from typing import Optional
from fastapi import Depends, Request
from fastapi_users import BaseUserManager, FastAPIUsers, UUIDIDMixin
from fastapi_users.authentication import (
    AuthenticationBackend,
    BearerTransport,
    JWTStrategy,
)
from fastapi_users.db import SQLAlchemyUserDatabase
from app.db import User, get_user_db
from dotenv import load_dotenv

# Get the current environment from the environment variable
current_environment = os.getenv("APP_ENV", "dev")

# Load the appropriate .env file based on the current environment
if current_environment == "dev":
    load_dotenv(".env.dev")
elif current_environment == "test":
    load_dotenv(".env.test")
elif current_environment == "prod":
    load_dotenv(".env.prod")
else:
    raise ValueError("Invalid environment specified")

SECRET = os.getenv("APP_SECRET")


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

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


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

seconds_in_day = 60 * 60 * 24
seconds_in_month = seconds_in_day * 31
seconds_in_six_months = seconds_in_month * 6

def get_jwt_strategy() -> JWTStrategy:
    return JWTStrategy(secret=SECRET, lifetime_seconds=seconds_in_six_months)


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

fastapi_users = FastAPIUsers[User, uuid.UUID](get_user_manager, [auth_backend])

current_active_user = fastapi_users.current_user(active=True)