from __future__ import annotations

from typing import Any


class ConversationBindings:
    MAX_ENTRIES = 2048

    def __init__(self) -> None:
        self._bindings: dict[str, dict[str, Any]] = {}

    def bind(self, conversation_id: str, chat_guid: str, context: dict[str, Any]) -> None:
        self._trim()
        self._bindings[conversation_id] = {
            "chat_guid": chat_guid,
            "context": context,
        }

    def resolve(self, conversation_id: str) -> dict[str, Any] | None:
        return self._bindings.get(conversation_id)

    def resolve_by_chat_guid(self, chat_guid: str) -> str | None:
        for conv_id, binding in self._bindings.items():
            if binding.get("chat_guid") == chat_guid:
                return conv_id
        return None

    def unbind(self, conversation_id: str) -> None:
        self._bindings.pop(conversation_id, None)

    def _trim(self) -> None:
        if len(self._bindings) > self.MAX_ENTRIES:
            oldest = sorted(self._bindings.keys())[: len(self._bindings) - self.MAX_ENTRIES]
            for k in oldest:
                del self._bindings[k]