from abc import ABC, abstractmethod

from core_notifications.models import db


class BaseLogicService(ABC):
    """
    Base interface to encapsulate business logic.

    Example usage:
        class ConcreteService(BaseLogicService):
            def process(self, arg1, arg2):
                print("Doing some work")

        ConcreteService.execute(arg1, arg2)
    """

    commit = True

    @classmethod
    def execute(cls, *args, **kwargs):
        session = db.session
        instance = cls(session=session)
        result = instance.process(*args, **kwargs)
        if cls.commit:
            session.commit()
        return result

    @abstractmethod
    def process(self, *args, **kwargs):
        pass

    def __init__(self, session):
        self.session = session

    def __repr__(self):
        return self.__class__.__name__