__init__.py

from config import config
from flask import Flask
from flask_apscheduler import APScheduler
from flask_login import LoginManager
from flask_mail import Mail
from flask_sqlalchemy import SQLAlchemy


db = SQLAlchemy()
login_manager = LoginManager()
login_manager.login_view = 'auth.login'
mail = Mail()
scheduler = APScheduler()


def create_app(config_name):
    app = Flask(__name__)
    app.config.from_object(config[config_name])

    config[config_name].init_app(app)
    db.init_app(app)
    login_manager.init_app(app)
    mail.init_app(app)
    scheduler.init_app(app)
    scheduler.start()

    from .api import api as api_blueprint
    app.register_blueprint(api_blueprint, url_prefix='/api')

    from .auth import auth as auth_blueprint
    app.register_blueprint(auth_blueprint, url_prefix='/auth')

    from .services import services as services_blueprint
    app.register_blueprint(services_blueprint, url_prefix='/services')

    from .main import main as main_blueprint
    app.register_blueprint(main_blueprint)

    from .admin import admin as admin_blueprint
    app.register_blueprint(admin_blueprint, url_prefix='/admin')

    return app