import os

from flask import Flask

def create_app():
    app = Flask(__name__, instance_relative_config=True)
    app.config.from_mapping(
        SECRET_KEY=os.urandom(24),
        DATABASE=os.path.join(app.instance_path, 'data.db'),
    )

    try:
        os.makedirs(app.instance_path)
    except OSError:
        pass

    from . import db
    db.init_app(app)

    from . import controller
    app.register_blueprint(controller.bp)

    from .mqttHandler import mqtt, bp as mqtt_bp
    app.register_blueprint(mqtt_bp)

    app.config['MQTT_BROKER_URL'] = 'localhost'
    app.config['MQTT_BROKER_PORT'] = 1883
    app.config['MQTT_USERNAME'] = 'user'
    app.config['MQTT_PASSWORD'] = 'test'
    app.config['MQTT_KEEPALIVE'] = 5
    app.config['MQTT_TLS_ENABLED'] = False

    mqtt.init_app(app)

    return app