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', '')