# backend/extensions.py
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from flask_caching import Cache
from flask_socketio import SocketIO
from flask_mail import Mail
from flask_limiter import Limiter
from flask_limiter.util import get_remote_address

# Initialize extensions without app
db = SQLAlchemy()
migrate = Migrate()
cache = Cache(config={'CACHE_TYPE': 'SimpleCache'})
socketio = SocketIO()
mail = Mail()
limiter = Limiter(key_func=get_remote_address)