from typing import Dict, Any, Optional

class QQOfficialEvent(dict):
    @staticmethod
    def from_payload(payload: Dict[str, Any]) -> Optional["QQOfficialEvent"]:
        try:
            event = QQOfficialEvent(payload)
            return event
        except KeyError:
            return None
        

    @property
    def t(self) -> str:
        """
        事件类型
        """
        return self.get("t", "")
    
    @property
    def user_openid(self) -> str:
        """
        用户openid
        """
        return self.get("user_openid",{})
    
    @property
    def timestamp(self) -> str:
        """
        时间戳
        """
        return self.get("timestamp",{})
    
    
    @property
    def d_author_id(self) -> str:
        """
        作者id
        """
        return self.get("id",{})
    
    @property
    def content(self) -> str:
        """
        内容
        """
        return self.get("content",'')
    
    @property
    def d_id(self) -> str:
        """
        d_id
        """
        return self.get("d_id",{})
    
    @property
    def id(self) -> str:
        """
        消息id，msg_id
        """
        return self.get("id",{})
    
    @property
    def channel_id(self) -> str:
        """
        频道id
        """
        return self.get("channel_id",{})
    
    @property
    def username(self) -> str:
        """
        用户名
        """
        return self.get("username",{})
    
    @property
    def guild_id(self) -> str:
        """
        频道id
        """
        return self.get("guild_id",{})
    
    @property
    def member_openid(self) -> str:
        """
        成员openid
        """
        return self.get("openid",{})
    
    @property
    def attachments(self) -> str:
        """
        附件url
        """
        url = self.get("image_attachments", "")
        if url and not url.startswith("https://"):
            url = "https://" + url
        return url
    
    @property
    def group_openid(self) -> str:
        """
        群组id
        """
        return self.get("group_openid",{})
    
    @property
    def content_type(self) -> str:
        """
        文件类型
        """
        return self.get("content_type","")