"""NoneBot 版 BotManager：管理 OneBot 适配器实例。"""

from __future__ import annotations

from typing import Any


class BotManager:
    def __init__(self):
        self._adapters: dict[str, Any] = {}

    def register_adapter(self, adapter: Any, platform_id: str | None = None) -> None:
        pid = platform_id or getattr(adapter, "platform_id", "onebot") or "onebot"
        self._adapters[str(pid)] = adapter

    def set_bot_instance(self, bot_instance: Any, platform_id: str | None = None) -> None:
        """兼容接口：按平台登记一个适配器。"""
        pid = platform_id or "onebot"
        from .adapter import OneBotAdapter
        self.register_adapter(OneBotAdapter(bot_instance, {"platform_id": pid}), pid)

    def get_adapter(self, platform_id: str | None = None) -> Any | None:
        if not self._adapters:
            return None
        if platform_id and str(platform_id) in self._adapters:
            return self._adapters[str(platform_id)]
        return next(iter(self._adapters.values()))

    def get_adapter_platform_id(self, adapter: Any) -> str:
        return str(getattr(adapter, "platform_id", "onebot"))

    def get_platform_ids(self) -> list[str]:
        return list(self._adapters.keys())

    def get_platform_count(self) -> int:
        return len(self._adapters)