import gettext as gettext_module
import os
import sys
import warnings

from jogai import settings


def to_language(locale):
    """Turn a locale name (en_US) into a language name (en-us)."""
    p = locale.find('_')
    if p >= 0:
        return locale[:p].lower() + '-' + locale[p + 1 :].lower()
    else:
        return locale.lower()


def to_locale(language):
    """Turn a language name (en-us) into a locale name (en_US)."""
    lang, _, country = language.lower().partition('-')
    if not country:
        return language[:3].lower() + language[3:]
    # A language with > 2 characters after the dash only has its first
    # character after the dash capitalized; e.g. sr-latn becomes sr_Latn.
    # A language with 2 characters after the dash has both characters
    # capitalized; e.g. en-us becomes en_US.
    country, _, tail = country.partition('-')
    country = country.title() if len(country) > 2 else country.upper()
    if tail:
        country += '-' + tail
    return lang + '_' + country


def gettext(message):
    """
    TODO: Implement this function

    Translate the 'message' string.
    """
    return message

    """
    eol_message = message.replace('\r\n', '\n').replace('\r', '\n')

    if eol_message:
        _translation_object = GameTranslation(settings.LANGUAGE_CODE)
        result = _translation_object.gettext(eol_message)
    else:
        # Return an empty value of the corresponding type if an empty message
        # is given, instead of metadata, which is the default gettext behavior.
        result = type(message)('')

    return result
    """


class GameTranslation(gettext_module.GNUTranslations):
    domain = 'jogai'

    def __init__(self, language, domain=None, localedirs=None):
        """Create a class to manage game translations"""
        gettext_module.GNUTranslations.__init__(self)
        if domain is not None:
            self.domain = domain

        self.__language = language
        self.__locale = to_locale(language)
        self._manager = None

        if self.domain == 'jogai':
            if localedirs is not None:
                # A module-level cache is used for caching 'django' translations
                warnings.warn(
                    'localedirs is ignored when domain is "jogai".',
                    RuntimeWarning,
                )
                localedirs = None
            self._manager = self._init_translation_manager()

        if (
            self.__language == settings.LANGUAGE_CODE
            and self.domain == 'jogai'
            and self._manager is None
        ):
            # default lang should have a translation file available.
            raise OSError(
                f'No translation files found for language {settings.LANGUAGE_CODE}.'
            )

    def __repr__(self):
        return f'<GameTranslation lang: {self.__language}'

    def _init_translation_manager(self):
        settingsfile = sys.modules[settings.__module__].__file__
        localedir = os.path.join(os.path.dirname(settingsfile), 'locale')
        return self._new_gnu_trans(localedir)

    def _new_gnu_trans(self, localedir):
        return gettext_module.translation(
            domain=self.domain,
            localedir=localedir,
            languages=[self.__locale],
        )

    def language(self):
        """Return the translation language."""
        return self.__language