from flask import Flask
from .models import db
import os

def create_app():
    app = Flask(__name__)

    # Configuration
    app.config['SECRET_KEY'] = os.environ.get('SECRET_KEY', 'dev-secret-key-change-in-production')
    app.config['SQLALCHEMY_DATABASE_URI'] = os.environ.get('DATABASE_URL', 'sqlite:///fire_alarm.db')
    app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

    # Initialize extensions
    db.init_app(app)

    # Register blueprints
    from .routes import main_bp, api_bp
    app.register_blueprint(main_bp)
    app.register_blueprint(api_bp, url_prefix='/api')

    # Create tables
    with app.app_context():
        db.create_all()

    return app