# SPDX-License-Identifier: CC0-1.0


class MonthNumConvert:
    __months = (
        "january",
        "february",
        "march",
        "april",
        "may",
        "june",
        "july",
        "august",
        "september",
        "october",
        "november",
        "december",
    )

    # https://example.com/1 -> January
    def __num_to_name(self, num):
        if (num > 12) or (num < 1):
            return None
        return self.__months[num - 1].title()

    def __name_to_num(self, name):
        for i, month in enumerate(self.__months):
            if name[0:3].lower() == month[0:3]:
                return i + 1

    # a is a string
    def convert(self, a):
        try:
            return self.__num_to_name(int(a))
        except ValueError:
            pass

        # So it's not a number
        return self.__name_to_num(a)