import os

basedir = os.path.abspath(os.path.dirname(__file__))


class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'dev-secret-key-change-in-production'
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or \
        'sqlite:///' + os.path.join(basedir, 'instance', 'directlx.db')
    SQLALCHEMY_TRACK_MODIFICATIONS = False


class DevelopmentConfig(Config):
    DEBUG = True


class ProductionConfig(Config):
    DEBUG = False

    @property
    def SECRET_KEY(self):
        key = os.environ.get('SECRET_KEY')
        if not key:
            raise ValueError('SECRET_KEY environment variable must be set in production')
        return key


config = {
    'development': DevelopmentConfig,
    'production': ProductionConfig,
    'default': DevelopmentConfig
}