from dataclasses import dataclass
from typing import Optional, Dict, Any
from enum import Enum
import xml.etree.ElementTree as ET
import json


class MessageType(Enum):
    """消息类型枚举"""
    TEXT = 1  # 文本消息
    IMAGE = 3  # 图片消息
    VOICE = 34  # 语音消息
    VIDEO = 43  # 视频消息
    EMOJI = 47  # emoji表情
    LOCATION = 48  # 地理位置
    APP = 49  # 应用消息(链接、文件、小程序等)
    SYSTEM = 10000  # 系统消息
    SYSTEM_NOTIFY = 10002  # 系统通知


class AppMessageType(Enum):
    """应用消息类型枚举"""
    LINK = 5  # 链接消息
    FILE = 6  # 文件消息
    FILE_NOTICE = 74  # 文件上传通知
    MINIPROGRAM = 33  # 小程序消息
    QUOTE = 57  # 引用消息
    TRANSFER = 2000  # 转账消息
    RED_PACKET = 2001  # 红包消息
    CHANNELS = 51  # 视频号消息


@dataclass
class MessageContent:
    """消息内容"""
    raw_content: str  # 原始内容
    xml_content: Optional[ET.Element] = None  # XML内容(如果有)

    def __post_init__(self):
        """处理XML内容"""
        if self.raw_content.startswith('<?xml') or self.raw_content.startswith('<msg'):
            try:
                self.xml_content = ET.fromstring(self.raw_content)
            except ET.ParseError:
                self.xml_content = None


@dataclass
class ImageContent:
    """图片消息特定内容"""
    aes_key: str
    url: str
    length: int
    md5: str
    thumb_base64: Optional[str] = None


@dataclass
class VoiceContent:
    """语音消息特定内容"""
    voice_length: int
    aes_key: str
    url: str
    voice_base64: Optional[str] = None


@dataclass
class VideoContent:
    """视频消息特定内容"""
    aes_key: str
    video_url: str
    thumb_url: str
    length: int
    play_length: int


@dataclass
class LocationContent:
    """地理位置特定内容"""
    x: float  # 纬度
    y: float  # 经度
    label: str  # 地址标签
    poi_name: Optional[str] = None  # 地点名称


@dataclass
class WxMessage:
    """消息基础类"""
    type_name: str
    appid: str
    wxid: str
    msg_id: int
    sender: str
    to_user: str
    roomid: str  # 新增room_id属性
    msg_type: MessageType
    content: MessageContent
    create_time: int
    push_content: Optional[str]
    new_msg_id: int
    msg_seq: int
    msg_source: str
    raw_data: Dict[str, Any]  # 原始JSON数据

    @classmethod
    def from_json(cls, json_data: Dict[str, Any]) -> 'WxMessage':
        """从JSON数据创建消息对象"""
        data = json_data.get("Data", {})
        to_user = data.get("ToUserName", {}).get("string", "")

        return cls(
            type_name=json_data.get("TypeName", ""),
            appid=json_data.get("Appid", ""),
            wxid=json_data.get("Wxid", ""),
            msg_id=data.get("MsgId", 0),
            sender=data.get("FromUserName", {}).get("string", ""),
            to_user=to_user,
            roomid=to_user if to_user.endswith("@chatroom") else "",  # 设置room_id
            msg_type=MessageType(data.get("MsgType", 0)),
            content=MessageContent(data.get("Content", {}).get("string", "")),
            create_time=data.get("CreateTime", 0),
            push_content=data.get("PushContent"),
            new_msg_id=data.get("NewMsgId", 0),
            msg_seq=data.get("MsgSeq", 0),
            msg_source=data.get("MsgSource", ""),
            raw_data=json_data
        )

    def __str__(self) -> str:
        """返回消息的字符串表示，用于打印和日志"""
        # 获取消息类型的名称
        msg_type_name = self.msg_type.name if self.msg_type else "UNKNOWN"
        
        # 处理不同类型的消息内容
        content_str = ""
        if self.msg_type == MessageType.TEXT:
            # 文本消息直接显示内容
            content_str = self.content.raw_content
        elif self.msg_type == MessageType.IMAGE:
            # 图片消息显示图片信息
            img_content = self.get_image_content()
            if img_content:
                content_str = f"[图片] 大小: {img_content.length}字节, MD5: {img_content.md5}"
            else:
                content_str = "[图片]"
        elif self.msg_type == MessageType.VOICE:
            # 语音消息显示语音信息
            voice_content = self.get_voice_content()
            if voice_content:
                content_str = f"[语音] 长度: {voice_content.voice_length}ms"
            else:
                content_str = "[语音]"
        elif self.msg_type == MessageType.VIDEO:
            # 视频消息显示视频信息
            video_content = self.get_video_content()
            if video_content:
                content_str = f"[视频] 长度: {video_content.play_length}ms, 大小: {video_content.length}字节"
            else:
                content_str = "[视频]"
        elif self.msg_type == MessageType.LOCATION:
            # 位置消息显示位置信息
            location_content = self.get_location_content()
            if location_content:
                content_str = f"[位置] {location_content.label}"
            else:
                content_str = "[位置]"
        elif self.msg_type == MessageType.APP:
            # 应用消息显示应用类型
            app_type = self.get_app_message_type()
            if app_type:
                content_str = f"[应用消息] 类型: {app_type.name}"
            else:
                content_str = "[应用消息]"
        elif self.msg_type == MessageType.EMOJI:
            content_str = "[表情]"
        elif self.msg_type == MessageType.SYSTEM:
            content_str = f"[系统消息] {self.content.raw_content}"
        elif self.msg_type == MessageType.SYSTEM_NOTIFY:
            content_str = f"[系统通知] {self.content.raw_content}"
        else:
            # 其他类型消息
            content_str = f"[未知类型消息] {self.content.raw_content[:30]}..."
        
        # 限制内容长度，避免过长
        if len(content_str) > 100:
            content_str = content_str[:97] + "..."
        
        # 构建基本信息
        from_info = f"发送者: {self.sender}"
        to_info = f"接收者: {self.to_user}"
        
        # 如果是群消息，添加群信息
        group_info = ""
        if self.from_group():
            group_info = f"群聊: {self.roomid}, "
        
        # 构建完整的消息字符串
        return (f"WxMessage[ID: {self.msg_id}, 类型: {msg_type_name}, "
                f"{group_info}{from_info}, {to_info}, "
                f"内容: {content_str}]")
    
    def __repr__(self) -> str:
        """返回消息的详细表示，用于调试"""
        return self.__str__()

    def from_self(self) -> bool:
        """判断是否是自己发送的消息"""
        return self.sender == self.wxid

    def from_group(self) -> bool:
        return self.to_user.endswith("@chatroom")

    def get_app_message_type(self) -> Optional[AppMessageType]:
        """获取应用消息类型"""
        if self.msg_type != MessageType.APP or not self.content.xml_content:
            return None

        try:
            appmsg = self.content.xml_content.find('.//appmsg')
            if appmsg is not None:
                type_value = int(appmsg.find('type').text)
                return AppMessageType(type_value)
        except (AttributeError, ValueError):
            pass
        return None

    def get_image_content(self) -> Optional[ImageContent]:
        """获取图片消息内容"""
        if self.msg_type != MessageType.IMAGE or not self.content.xml_content:
            return None

        try:
            img = self.content.xml_content.find('img')
            if img is not None:
                return ImageContent(
                    aes_key=img.get('aeskey', ''),
                    url=img.get('cdnthumburl', ''),
                    length=int(img.get('length', 0)),
                    md5=img.get('md5', ''),
                    thumb_base64=self.raw_data.get("Data", {}).get("ImgBuf", {}).get("buffer")
                )
        except (AttributeError, ValueError):
            pass
        return None

    def get_voice_content(self) -> Optional[VoiceContent]:
        """获取语音消息内容"""
        if self.msg_type != MessageType.VOICE or not self.content.xml_content:
            return None

        try:
            voice = self.content.xml_content.find('.//voicemsg')
            if voice is not None:
                return VoiceContent(
                    voice_length=int(voice.get('voicelength', 0)),
                    aes_key=voice.get('aeskey', ''),
                    url=voice.get('voiceurl', ''),
                    voice_base64=self.raw_data.get("Data", {}).get("ImgBuf", {}).get("buffer")
                )
        except (AttributeError, ValueError):
            pass
        return None

    def get_video_content(self) -> Optional[VideoContent]:
        """获取视频消息内容"""
        if self.msg_type != MessageType.VIDEO or not self.content.xml_content:
            return None

        try:
            video = self.content.xml_content.find('.//videomsg')
            if video is not None:
                return VideoContent(
                    aes_key=video.get('aeskey', ''),
                    video_url=video.get('cdnvideourl', ''),
                    thumb_url=video.get('cdnthumburl', ''),
                    length=int(video.get('length', 0)),
                    play_length=int(video.get('playlength', 0))
                )
        except (AttributeError, ValueError):
            pass
        return None

    def get_location_content(self) -> Optional[LocationContent]:
        """获取地理位置内容"""
        if self.msg_type != MessageType.LOCATION or not self.content.xml_content:
            return None

        try:
            location = self.content.xml_content.find('location')
            if location is not None:
                return LocationContent(
                    x=float(location.get('x', 0)),
                    y=float(location.get('y', 0)),
                    label=location.get('label', ''),
                    poi_name=location.get('poiname')
                )
        except (AttributeError, ValueError):
            pass
        return None