"""The main application factory."""
from logging import DEBUG, ERROR, getLogger

from celery import Celery
from flask import Flask
from redis import Redis

from magic_app.config import Base, Production

celery = Celery(__name__, broker=Base.CELERY_BROKER_URL)


def create_app(config=Production):
    """Main application factory."""
    app = Flask(__name__.split(".")[0])
    app.config.from_object(config)

    celery.conf.update(app.config)

    configure_redis(app)
    configure_views(app)
    configure_logging(app)

    return app


def configure_redis(app):
    """Configure Redis connection."""
    from magic_app.session import RedisSessionDB

    host = (Base.REDIS_HOST,)
    port = (Base.REDIS_PORT,)
    db_num = Base.REDIS_SESSION_DB

    if app.debug:
        from fakeredis import FakeRedis

        connection = FakeRedis()
    else:
        connection = Redis(host=host, port=port, db=db_num)

    app.config["SESSION"] = RedisSessionDB(connection)


def configure_views(app):
    """Configure API resource views."""
    from magic_app.views import home

    app.register_blueprint(home)


def configure_logging(app):
    """Configure application logging."""
    app_logger = getLogger(__name__)

    if not app.debug:
        app_logger.setLevel(ERROR)
    else:
        app_logger.setLevel(DEBUG)

    app.logging = app_logger