import os

from flask import Flask
from flask_cors import CORS
from flask_debugtoolbar import DebugToolbarExtension
from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()
toolbar = DebugToolbarExtension()
cors = CORS()


def create_app():
    app = Flask(__name__)
    app_settings = os.getenv('APP_SETTINGS')
    app.config.from_object(app_settings)

    db.init_app(app)
    toolbar.init_app(app)
    cors.init_app(app)

    from project.api.users import users_blueprint
    app.register_blueprint(users_blueprint)

    @app.shell_context_processor
    def ctx():
        return {'app': app, 'db': db}

    return app