import logging
import logging.config
from flask import Flask
from flask_socketio import emit

from common.extensions import db, socketio
from config.logging_config import LOGGING


def create_app(config_file=None):
    app = Flask(__name__)

    if config_file is None:
        app.config.from_object('config.config.DevConfig')
    else:
        app.config.from_object(config_file)

    logging.config.dictConfig(LOGGING)
    register_extensions(app)

    return app


def register_extensions(app):
    db.init_app(app)
    socketio.init_app(app,
                      message_queue=app.config.get('SOCKETIO_MESSAGE_QUEUE'),
                      cors_allowed_origins=app.config.get('SOCKETIO_CORS_ALLOWED_ORIGINS'),
                      async_mode=app.config.get('SOCKETIO_ASYNC_MODE'),
                      logger=app.config.get('SOCKETIO_LOGGER'),
                      engineio_logger=app.config.get('SOCKETIO_ENGINEIO_LOGGER'),
                      )