import os


class BaseConfig:
    TESTING = False
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    SECRET_KEY = 'my_precious'
    DEBUG_TB_ENABLED = False
    DEBUG_TB_INTERCEPT_REDIRECTS = False


class DevelopmentConfig(BaseConfig):
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL')
    DEBUG_TB_ENABLED = True


class ProductionConfig(BaseConfig):
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL')


class TestingConfig(BaseConfig):
    TESTING = True
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_TEST_URL')