from datetime import datetime
from typing import Optional, Union

QR_CODE_GENERATION_VERSION_DATE: datetime = datetime(year=2020, month=9, day=8, hour=12)
SIZE_DICT: dict = {"t": 6, "s": 12, "m": 18, "l": 30, "h": 48}
ERROR_CORRECTION_DICT: dict = {"L": "l", "M": "m", "Q": "q", "H": "h"}
DEFAULT_MODULE_SIZE: Union[str, int] = "m"
DEFAULT_BORDER_SIZE: int = 4
DEFAULT_VERSION: Optional[int] = None
DEFAULT_IMAGE_FORMAT: str = "svg"
DEFAULT_ERROR_CORRECTION: str = "m"
DEFAULT_ECI: bool = False
DEFAULT_BOOST_ERROR: bool = True
DEFAULT_ENCODING: str = "utf-8"
DEFAULT_CACHE_ENABLED: bool = True
DEFAULT_URL_SIGNATURE_ENABLED: bool = True

ALLOWS_EXTERNAL_REQUESTS_FOR_REGISTERED_USER: str = "ALLOWS_EXTERNAL_REQUESTS_FOR_REGISTERED_USER"
SIGNING_KEY: str = "SIGNING_KEY"
TOKEN_LENGTH: str = "TOKEN_LENGTH"
SIGNING_SALT: str = "SIGNING_SALT"