from __future__ import annotations

from typing import TYPE_CHECKING


if TYPE_CHECKING:
    from datetime import datetime


class TimezoneError(ValueError):
    pass


class InvalidTimezone(TimezoneError):
    pass


class NonExistingTime(TimezoneError):
    message = "The datetime {} does not exist."

    def __init__(self, dt: datetime) -> None:
        message = self.message.format(dt)

        super().__init__(message)


class AmbiguousTime(TimezoneError):
    message = "The datetime {} is ambiguous."

    def __init__(self, dt: datetime) -> None:
        message = self.message.format(dt)

        super().__init__(message)