import re

from bridge.context import ContextType
from channel.chat_message import ChatMessage
from common.log import logger
from common.tmp_dir import TmpDir
from lib import itchat
from lib.itchat.content import *

class WechatMessage(ChatMessage):
    def __init__(self, itchat_msg, is_group=False):
        super().__init__(itchat_msg)
        self.msg_id = itchat_msg["MsgId"]
        self.create_time = itchat_msg["CreateTime"]
        self.is_group = is_group

        if itchat_msg["Type"] == TEXT:
            self.ctype = ContextType.TEXT
            self.content = itchat_msg["Text"]
        elif itchat_msg["Type"] == VOICE:
            self.ctype = ContextType.VOICE
            self.content = TmpDir().path() + itchat_msg["FileName"]  # content直接存临时目录路径
            self._prepare_fn = lambda: itchat_msg.download(self.content)
        elif itchat_msg["Type"] == PICTURE and itchat_msg["MsgType"] == 3:
            self.ctype = ContextType.IMAGE
            self.content = TmpDir().path() + itchat_msg["FileName"]  # content直接存临时目录路径
            self._prepare_fn = lambda: itchat_msg.download(self.content)
        elif itchat_msg["Type"] == NOTE and itchat_msg["MsgType"] == 10000:
            if is_group and ("加入群聊" in itchat_msg["Content"] or "加入了群聊" in itchat_msg["Content"]):
                self.ctype = ContextType.JOIN_GROUP
                self.content = itchat_msg["Content"]
                # 这里只能得到nickname， actual_user_id还是机器人的id
                if "加入了群聊" in itchat_msg["Content"]:
                    self.actual_user_nickname = re.findall(r"\"(.*?)\"", itchat_msg["Content"])[-1]
                elif "加入群聊" in itchat_msg["Content"]:
                    self.actual_user_nickname = re.findall(r"\"(.*?)\"", itchat_msg["Content"])[0]
            elif "拍了拍我" in itchat_msg["Content"]:
                self.ctype = ContextType.PATPAT
                self.content = itchat_msg["Content"]
                if is_group:
                    self.actual_user_nickname = re.findall(r"\"(.*?)\"", itchat_msg["Content"])[0]
            else:
                raise NotImplementedError("Unsupported note message: " + itchat_msg["Content"])
        elif itchat_msg["Type"] == ATTACHMENT:
            self.ctype = ContextType.FILE
            self.content = TmpDir().path() + itchat_msg["FileName"]
            self._prepare_fn = lambda: itchat_msg.download(self.content)
        elif itchat_msg["Type"] == SHARING:
            self.ctype = ContextType.SHARING
            self.content = itchat_msg.get("Url")

        else:
            raise NotImplementedError("Unsupported message type: Type:{} MsgType:{}".format(itchat_msg["Type"], itchat_msg["MsgType"]))

        self.from_user_id = itchat_msg["FromUserName"]
        self.to_user_id = itchat_msg["ToUserName"]

        user_id = itchat.instance.storageClass.userName
        nickname = itchat.instance.storageClass.nickName

        # 虽然from_user_id和to_user_id用的少，但是为了保持一致性，还是要填充一下
        # 以下很繁琐，一句话总结：能填的都填了。
        if self.from_user_id == user_id:
            self.from_user_nickname = nickname
        if self.to_user_id == user_id:
            self.to_user_nickname = nickname
        try:  # 陌生人时候, User字段可能不存在
            # my_msg 为True是表示是自己发送的消息
            self.my_msg = itchat_msg["ToUserName"] == itchat_msg["User"]["UserName"] and \
                          itchat_msg["ToUserName"] != itchat_msg["FromUserName"]
            self.other_user_id = itchat_msg["User"]["UserName"]
            self.other_user_nickname = itchat_msg["User"]["NickName"]
            if self.other_user_id == self.from_user_id:
                self.from_user_nickname = self.other_user_nickname
            if self.other_user_id == self.to_user_id:
                self.to_user_nickname = self.other_user_nickname
            if itchat_msg["User"].get("Self"):
                # 自身的展示名，当设置了群昵称时，该字段表示群昵称
                self.self_display_name = itchat_msg["User"].get("Self").get("DisplayName")
        except KeyError as e:  # 处理偶尔没有对方信息的情况
            logger.warn("[WX]get other_user_id failed: " + str(e))
            if self.from_user_id == user_id:
                self.other_user_id = self.to_user_id
            else:
                self.other_user_id = self.from_user_id

        if self.is_group:
            self.is_at = itchat_msg["IsAt"]
            self.actual_user_id = itchat_msg["ActualUserName"]
            if self.ctype not in [ContextType.JOIN_GROUP, ContextType.PATPAT]:
                self.actual_user_nickname = itchat_msg["ActualNickName"]
