from __future__ import annotations


class ConversationRoute:
    def __init__(self):
        self._routes: dict[str, str] = {}

    def register(self, conversation_id: str, adapter_key: str) -> None:
        self._routes[conversation_id] = adapter_key

    def resolve(self, conversation_id: str) -> str | None:
        return self._routes.get(conversation_id)

    def unregister(self, conversation_id: str) -> None:
        self._routes.pop(conversation_id, None)