from astrbot.api.event import AstrMessageEvent
from astrbot.api.event.filter import event_message_type, EventMessageType
from astrbot.api.star import Context, Star, register
from astrbot.api import logger
import astrbot.api.message_components as Comp


def _check_at_bot(message_obj) -> bool:
    """
    检测群聊消息是否@了当前机器人。
    依据: plugin.md 中 AstrBotMessage 及消息链定义:
      - message_obj.message 为 BaseMessageComponent 列表
      - At(qq=...) 为 @ 消息段，message_obj.self_id 为机器人的标识 ID
    当消息链中存在 At 且其 qq 等于 self_id 时，判定为@了机器人。
    忽略 AtAll(@全体)。
    """
    try:
        self_id = str(getattr(message_obj, "self_id", "")) or ""
        segments = getattr(message_obj, "message", []) or []
    except Exception:
        return False

    if not self_id or not isinstance(segments, list):
        return False

    for seg in segments:
        # 适配对象消息段
        try:
            if isinstance(seg, Comp.At):
                # 排除 @all
                if isinstance(seg, Comp.AtAll):
                    continue
                if str(seg.qq) == self_id:
                    return True
        except Exception:
            pass

        # 适配字典形式的消息段（稳健性处理）
        try:
            if isinstance(seg, dict):
                seg_type = str(seg.get("type", "")).lower()
                data = seg.get("data", {}) or {}
                if seg_type == "at":
                    qq = str(data.get("qq", ""))
                    if qq and qq.lower() != "all" and qq == self_id:
                        return True
        except Exception:
            pass

    return False




@register("relay", "YourName", "消息中转插件", "1.0.0")
class RelayPlugin(Star):
    def __init__(self, context: Context, config=None):
        super().__init__(context)
        self.config = config or {}
        # 读取群聊白名单和私聊黑名单，全部转为字符串集合，避免类型不一致
        self.group_whitelist = set(str(x) for x in self.config.get("group_whitelist", []))
        self.private_blacklist = set(str(x) for x in self.config.get("private_blacklist", []))
        logger.info(f"[RelayPlugin] 群聊白名单: {self.group_whitelist}")
        logger.info(f"[RelayPlugin] 私聊黑名单: {self.private_blacklist}")

    @event_message_type(EventMessageType.GROUP_MESSAGE)
    async def on_group_message(self, event: AstrMessageEvent):
        
        group_id = str(event.message_obj.group_id)
        at_bot = _check_at_bot(event.message_obj)
        
        if group_id not in self.group_whitelist:
            logger.info(f"[RelayPlugin] 群聊 {group_id} 不在白名单，忽略消息")
            return
        if not at_bot:
            logger.info(f"[RelayPlugin] 群聊 {group_id} 消息未@机器人，忽略消息")
            return
        logger.info(f"[RelayPlugin] 群聊 {group_id} 消息链: {event.message_obj.message}")
        # TODO: 处理函数留空

    @event_message_type(EventMessageType.PRIVATE_MESSAGE)
    async def on_private_message(self, event: AstrMessageEvent):
        sender = event.message_obj.sender
        if hasattr(sender, 'id'):
            sender_id = str(sender.id)
        else:
            sender_id = str(sender)
        if sender_id in set(str(x) for x in self.private_blacklist):
            logger.info(f"[RelayPlugin] 私聊 {sender_id} 在黑名单，忽略消息")
            return
        logger.info(f"[RelayPlugin] 私聊 {sender_id} 消息链: {event.message_obj.message}")
        # TODO: 处理函数留空