from abc import ABC
from dataclasses import replace
from typing import Self

from domain.marketplace.domain_event import DomainEvent


class Entity(ABC):
    _changes: tuple[DomainEvent, ...] = ()

    def apply_event(self, event: DomainEvent) -> Self:
        return replace(self, _changes=(*self._changes, event))

    def get_changes(self) -> tuple[DomainEvent, ...]:
        return self._changes

    def _ensure_valid_state(self):
        pass

    def when(self, event: DomainEvent) -> Self:
        return self

    def clear_changes(self) -> Self:
        return replace(self, _changes=())