from aiogram import Dispatcher

from ocab_core.modules_system import ModulesManager


class SingletonMeta(type):
    _instances = {}

    def __call__(cls, *args, **kwargs):
        if cls not in cls._instances:
            instance = super().__call__(*args, **kwargs)
            cls._instances[cls] = instance
        return cls._instances[cls]


class Singleton(metaclass=SingletonMeta):
    dp: Dispatcher = None
    modules_manager: ModulesManager = None
    storage = dict()