from json import load
from os.path import join, dirname
from typing import Dict

from manager_environment import EnvironmentManager as EM


def init_localization_manager():
    """
    Initialize localization manager.
    Load GUI translations JSON file.
    """
    LocalizationManager.load_localization("translation.json")


class LocalizationManager:
    """
    Class for handling localization (and maybe other file IO in future).
    Stores localization in dictionary.
    """

    _LOCALIZATION: Dict[str, str] = dict()

    @staticmethod
    def load_localization(file: str):
        """
        Read localization file and store locale defined with environmental variable.

        :param file: Localization file path, related to current file (in sources root).
        """
        with open(join(dirname(__file__), file), encoding="utf-8") as config_file:
            data = load(config_file)
        LocalizationManager._LOCALIZATION = data[EM.LOCALE]

    @staticmethod
    def t(key: str) -> str:
        """
        Translate string to current localization.

        :param key: Localization key.
        :returns: Translation string.
        """
        return LocalizationManager._LOCALIZATION[key]