IL2HorusTeam/il2fb-difficulty

# -*- coding: utf-8 -*-

import six

from .utils import translations


_ = translations.ugettext


def validate_difficulty(value):
    """
    Check if difficulty value taken from config is valid.

    >>> validate_difficulty(0)
    >>> validate_difficulty(123)
    >>> validate_difficulty(0.0)
    Traceback (most recent call last):
        ...
    TypeError: Difficulty value must be an integer.
    >>> validate_difficulty("0")
    Traceback (most recent call last):
        ...
    TypeError: Difficulty value must be an integer.
    >>> validate_difficulty(-1)
    Traceback (most recent call last):
        ...
    ValueError: Difficulty value must be >= 0.
    """
    if not isinstance(value, six.integer_types):
        raise TypeError(_("Difficulty value must be an integer."))

    if value < 0:
        raise ValueError(_("Difficulty value must be >= 0."))


def validate_settings(value):
    """
    >>> validate_settings({})
    >>> validate_settings([])
    Traceback (most recent call last):
        ...
    TypeError: Settings must be an instance of 'dict' or its subclass.
    """
    if not isinstance(value, dict):
        raise TypeError(
            _("Settings must be an instance of '{expected}' or its subclass.")
            .format(expected=dict.__name__))