from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
from config import Config

db = SQLAlchemy()
login_manager = LoginManager()

def ensure_database():
    """Initialize database tables if they don't exist"""
    try:
        db.create_all()
    except Exception as e:
        print(f"Database initialization error: {e}")

def create_app():
    app = Flask(__name__)
    app.config.from_object(Config)

    db.init_app(app)
    login_manager.init_app(app)
    login_manager.login_view = 'main.login'
    login_manager.login_message = 'Inloggen vereist om deze pagina te bekijken.'

    from app.models import User

    @login_manager.user_loader
    def load_user(user_id):
        return User.query.get(int(user_id))

    from app.routes import bp as main_bp
    app.register_blueprint(main_bp)

    return app