import json
import locale
import os

class I18nAuto:
    def __init__(self, language=None):
        if language in ["Auto", None]:
            language = locale.getdefaultlocale()[
                0
            ]  # getlocale can't identify the system's language ((None, None))
        if not os.path.exists(f"./{language}.json"):
            language = "en_US"
        self.language = language
        self.language_map = self.load_language_list(language)
        self.print()

    def __call__(self, key):
        return self.language_map.get(key, key)

    def print(self):
        print("Use Language:", self.language)

    @staticmethod
    def load_language_list(language):
        with open(f"./i18n/{language}.json", "r", encoding="utf-8") as f:
            language_list = json.load(f)
        return language_list
    
i18n = I18nAuto()