import typing


class PwdlibError(Exception):
    """
    Base pwdlib error.
    """

    def __init__(self, message: str) -> None:
        """
        Args:
            message:
                The error message.
        """
        self.message = message
        super().__init__(message)


class HasherNotAvailable(PwdlibError):
    """
    Error raised when an unavailable hash algorithm was installed.
    """

    def __init__(self, hasher: str) -> None:
        """
        Args:
            hasher:
                The unavailable hash algorithm.
        """
        self.hasher = hasher
        message = (
            f"The {hasher} hash algorithm is not available. "
            "Are you sure it's installed? "
            f"Try to run `pip install pwdlib[{hasher}]`."
        )
        super().__init__(message)


class UnknownHashError(PwdlibError):
    """
    Error raised when the hash can't be identified from the list of provided hashers.
    """

    def __init__(self, hash: typing.Union[str, bytes]) -> None:
        """
        Args:
            hash:
                The hash we failed to identify.
        """
        self.hash = hash
        message = (
            "This hash can't be identified. "
            "Make sure it's valid and that its corresponding hasher is enabled."
        )
        super().__init__(message)