import os

from flask import Flask

from atheneum.api import api_blueprint


def create_app(test_config=None):
    app = Flask(__name__, instance_relative_config=True)
    app.config.from_mapping(
        SECRET_KEY='dev',
        SQLALCHEMY_DATABASE_URI='sqlite:////tmp/test.db'
        # SQLALCHEMY_DATABASE_URI=os.path.join(app.instance_path, 'atheneum.db')
    )

    if test_config is None:
        app.config.from_object('atheneum.default_settings')
        app.config.from_pyfile('config.py', silent=True)
        if (os.getenv('ATHENEUM_SERVER_SETTINGS', None)):
            app.config.from_envvar('ATHENEUM_SERVER_SETTINGS')
    else:
        app.config.from_pyfile(test_config)

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

    app.register_blueprint(api_blueprint)

    return app