from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from config import Config
import os

db = SQLAlchemy()

def create_app(config_class=Config):
    app = Flask(__name__)
    app.config.from_object(config_class)
    
    # Ensure upload directories exist
    os.makedirs(app.config["PHOTO_FOLDER"], exist_ok=True)
    os.makedirs(app.config["QR_FOLDER"], exist_ok=True)
    os.makedirs(os.path.dirname(app.config["SQLALCHEMY_DATABASE_URI"].replace("sqlite:///", "")), exist_ok=True)
    
    db.init_app(app)
    
    from app.routes import main_bp
    app.register_blueprint(main_bp)
    
    with app.app_context():
        db.create_all()
    
    return app