"""
企微通知服务

封装企业微信 API，支持：
- 个人消息：button_interaction 模板卡片（原生按钮交互）
- 群聊消息：image + news + @text 组合消息
- 媒体上传：图片上传获取 media_id
- 卡片更新：按钮点击后更新卡片状态
"""

import httpx
import time
from typing import Optional, List, Dict

from app.utils.logger import logger

# 告警类型中文映射（全局复用）
ALARM_TYPE_NAMES = {
    "leave_post": "人员离岗",
    "intrusion": "周界入侵",
}

# 告警级别映射
ALARM_LEVEL_NAMES = {1: "提醒", 2: "一般", 3: "严重", 4: "紧急"}


class WeChatService:
    """企微通知服务（单例）"""

    def __init__(self):
        self._enabled = False
        self._corp_id = ""
        self._agent_id = ""
        self._secret = ""
        self._token = ""
        self._encoding_aes_key = ""
        self._access_token = ""
        self._token_expire_at = 0
        # 缓存 response_code，用于更新卡片状态
        # key: task_id (alarm_id), value: response_code
        self._response_codes: Dict[str, str] = {}

    def init(self, config):
        """初始化企微配置"""
        self._enabled = config.enabled and bool(config.corp_id) and bool(config.secret)
        self._corp_id = config.corp_id
        self._agent_id = config.agent_id
        self._secret = config.secret
        self._token = config.token
        self._encoding_aes_key = config.encoding_aes_key

        if self._enabled:
            logger.info(f"企微通知服务已启用: corp_id={self._corp_id}")
        else:
            logger.info("企微通知服务未启用")

    @property
    def enabled(self) -> bool:
        return self._enabled

    @property
    def agent_id_int(self) -> int:
        return int(self._agent_id) if self._agent_id else 0

    async def _get_access_token(self) -> str:
        """获取企微 access_token（带缓存）"""
        if self._access_token and time.time() < self._token_expire_at - 60:
            return self._access_token

        url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken"
        params = {"corpid": self._corp_id, "corpsecret": self._secret}

        async with httpx.AsyncClient(timeout=10) as client:
            resp = await client.get(url, params=params)
            data = resp.json()

        if data.get("errcode") != 0:
            raise Exception(f"获取 access_token 失败: {data}")

        self._access_token = data["access_token"]
        self._token_expire_at = time.time() + data.get("expires_in", 7200)
        logger.info("企微 access_token 已更新")
        return self._access_token

    def save_response_code(self, task_id: str, response_code: str):
        """保存卡片的 response_code（用于后续更新卡片状态）"""
        self._response_codes[task_id] = response_code

    def get_response_code(self, task_id: str) -> Optional[str]:
        """获取并消耗 response_code（只能用一次）"""
        return self._response_codes.pop(task_id, None)

    # ==================== 媒体上传 ====================

    async def upload_media(self, image_data: bytes, filename: str = "alarm.jpg") -> Optional[str]:
        """
        上传临时素材到企微，返回 media_id（3天有效）

        用于群聊发送图片消息。
        """
        if not self._enabled:
            return None

        try:
            access_token = await self._get_access_token()
            url = f"https://qyapi.weixin.qq.com/cgi-bin/media/upload?access_token={access_token}&type=image"

            async with httpx.AsyncClient(timeout=30) as client:
                files = {"media": (filename, image_data, "image/jpeg")}
                resp = await client.post(url, files=files)
                data = resp.json()

            if data.get("errcode") and data.get("errcode") != 0:
                logger.error(f"企微媒体上传失败: {data}")
                return None

            media_id = data.get("media_id", "")
            logger.info(f"企微媒体上传成功: media_id={media_id[:20]}...")
            return media_id

        except Exception as e:
            logger.error(f"企微媒体上传异常: {e}")
            return None

    async def _download_image(self, image_url: str) -> Optional[bytes]:
        """从 URL 下载图片数据"""
        try:
            async with httpx.AsyncClient(timeout=20, follow_redirects=True) as client:
                resp = await client.get(image_url)
                if resp.status_code == 200:
                    return resp.content
                logger.error(f"下载图片失败: status={resp.status_code}, url={image_url[:80]}")
                return None
        except Exception as e:
            logger.error(f"下载图片异常: {e}")
            return None

    async def upload_media_from_url(self, image_url: str) -> Optional[str]:
        """从 URL 下载图片后上传到企微，返回 media_id"""
        image_data = await self._download_image(image_url)
        if not image_data:
            return None
        return await self.upload_media(image_data)

    # ==================== 个人消息：按钮交互型模板卡片 ====================

    async def send_alarm_card(
        self,
        user_ids: List[str],
        alarm_id: str,
        alarm_type: str,
        area_name: str,
        camera_name: str,
        description: str,
        event_time: str,
        alarm_level: int = 2,
    ) -> bool:
        """
        发送按钮交互型模板卡片（个人消息）

        卡片展示告警信息 + 「前往处理」「误报忽略」按钮，
        用户点击按钮后企微回调服务器。
        """
        if not self._enabled:
            logger.debug("企微未启用，跳过发送")
            return False

        try:
            access_token = await self._get_access_token()

            type_name = ALARM_TYPE_NAMES.get(alarm_type, alarm_type)
            level_name = ALARM_LEVEL_NAMES.get(alarm_level, "一般")

            msg = {
                "touser": "|".join(user_ids),
                "msgtype": "template_card",
                "agentid": self.agent_id_int,
                "template_card": {
                    "card_type": "button_interaction",
                    "task_id": alarm_id,
                    "source": {
                        "desc": "AI安防告警",
                        "desc_color": 3 if alarm_level >= 3 else 0,
                    },
                    "main_title": {
                        "title": f"【{level_name}】{type_name}告警",
                        "desc": description or f"{area_name} 检测到{type_name}",
                    },
                    "sub_title_text": "请相关人员及时处理",
                    "horizontal_content_list": [
                        {"keyname": "告警区域", "value": area_name or "未知区域"},
                        {"keyname": "摄像头", "value": camera_name or "未知"},
                        {"keyname": "告警时间", "value": event_time},
                        {"keyname": "告警级别", "value": level_name},
                    ],
                    "card_action": {
                        "type": 1,
                        "url": "https://work.weixin.qq.com",
                    },
                    "button_list": [
                        {
                            "text": "前往处理",
                            "style": 1,
                            "key": f"handle_{alarm_id}",
                        },
                        {
                            "text": "误报忽略",
                            "style": 2,
                            "key": f"ignore_{alarm_id}",
                        },
                    ],
                },
            }

            url = f"https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token={access_token}"
            async with httpx.AsyncClient(timeout=10) as client:
                resp = await client.post(url, json=msg)
                data = resp.json()

            if data.get("errcode") != 0:
                logger.error(f"企微卡片发送失败: {data}")
                return False

            response_code = data.get("response_code", "")
            if response_code:
                self.save_response_code(alarm_id, response_code)

            logger.info(f"企微卡片已发送: alarm={alarm_id}, users={user_ids}")
            return True

        except Exception as e:
            logger.error(f"企微卡片发送异常: {e}")
            return False

    async def update_alarm_card(
        self,
        response_code: str,
        user_ids: List[str],
        alarm_id: str,
        action: str,
        operator_name: str = "",
    ) -> bool:
        """更新模板卡片状态（按钮变灰 + 显示处理结果）"""
        if not self._enabled:
            return False

        try:
            access_token = await self._get_access_token()

            action_text = {
                "handle": f"处理中 - {operator_name}" if operator_name else "处理中",
                "ignore": f"已忽略 - {operator_name}" if operator_name else "已忽略",
                "complete": f"已处理 - {operator_name}" if operator_name else "已处理",
            }
            replace_text = action_text.get(action, "已处理")

            body = {
                "userids": user_ids,
                "agentid": self.agent_id_int,
                "response_code": response_code,
                "template_card": {
                    "card_type": "button_interaction",
                    "task_id": alarm_id,
                    "main_title": {
                        "title": replace_text,
                    },
                    "sub_title_text": f"操作人：{operator_name}",
                    "button_list": [
                        {
                            "text": replace_text,
                            "style": 3,
                            "key": f"done_{alarm_id}",
                        },
                    ],
                },
            }

            url = f"https://qyapi.weixin.qq.com/cgi-bin/message/update_template_card?access_token={access_token}"
            async with httpx.AsyncClient(timeout=10) as client:
                resp = await client.post(url, json=body)
                data = resp.json()

            if data.get("errcode") != 0:
                logger.error(f"更新卡片失败: {data}")
                return False

            logger.info(f"卡片已更新: alarm={alarm_id}, action={action}")
            return True

        except Exception as e:
            logger.error(f"更新卡片异常: {e}")
            return False

    # ==================== 个人消息：文本 ====================

    async def send_text_message(self, user_id: str, content: str) -> bool:
        """发送文本消息给指定用户"""
        if not self._enabled:
            return False
        try:
            access_token = await self._get_access_token()
            msg = {
                "touser": user_id,
                "msgtype": "text",
                "agentid": self.agent_id_int,
                "text": {"content": content},
            }
            url = f"https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token={access_token}"
            async with httpx.AsyncClient(timeout=10) as client:
                resp = await client.post(url, json=msg)
                data = resp.json()
            if data.get("errcode") != 0:
                logger.error(f"企微文本消息发送失败: {data}")
                return False
            logger.info(f"企微文本消息已发送: user={user_id}")
            return True
        except Exception as e:
            logger.error(f"发送文本消息异常: {e}")
            return False

    # ==================== 群聊消息 ====================

    async def create_group_chat(
        self,
        name: str,
        owner: str,
        user_list: List[str],
        chat_id: str = "",
    ) -> Optional[str]:
        """创建企微群聊"""
        if not self._enabled:
            return None
        try:
            access_token = await self._get_access_token()
            body = {
                "name": name,
                "owner": owner,
                "userlist": user_list,
            }
            if chat_id:
                body["chatid"] = chat_id

            url = f"https://qyapi.weixin.qq.com/cgi-bin/appchat/create?access_token={access_token}"
            async with httpx.AsyncClient(timeout=10) as client:
                resp = await client.post(url, json=body)
                data = resp.json()

            if data.get("errcode") != 0:
                logger.error(f"创建群聊失败: {data}")
                return None

            chatid = data.get("chatid", "")
            logger.info(f"群聊已创建: name={name}, chatid={chatid}")
            return chatid
        except Exception as e:
            logger.error(f"创建群聊异常: {e}")
            return None

    async def send_group_text(self, chat_id: str, content: str) -> bool:
        """发送文本消息到群聊（支持 <@userid> 语法 @人员）"""
        if not self._enabled:
            return False
        try:
            access_token = await self._get_access_token()
            msg = {
                "chatid": chat_id,
                "msgtype": "text",
                "text": {"content": content},
            }
            url = f"https://qyapi.weixin.qq.com/cgi-bin/appchat/send?access_token={access_token}"
            async with httpx.AsyncClient(timeout=10) as client:
                resp = await client.post(url, json=msg)
                data = resp.json()
            if data.get("errcode") != 0:
                logger.error(f"群聊文本发送失败: {data}")
                return False
            logger.info(f"群聊文本已发送: chatid={chat_id}")
            return True
        except Exception as e:
            logger.error(f"发送群聊文本异常: {e}")
            return False

    async def send_group_image(self, chat_id: str, media_id: str) -> bool:
        """发送图片消息到群聊"""
        if not self._enabled:
            return False
        try:
            access_token = await self._get_access_token()
            msg = {
                "chatid": chat_id,
                "msgtype": "image",
                "image": {"media_id": media_id},
            }
            url = f"https://qyapi.weixin.qq.com/cgi-bin/appchat/send?access_token={access_token}"
            async with httpx.AsyncClient(timeout=10) as client:
                resp = await client.post(url, json=msg)
                data = resp.json()
            if data.get("errcode") != 0:
                logger.error(f"群聊图片发送失败: {data}")
                return False
            logger.info(f"群聊图片已发送: chatid={chat_id}")
            return True
        except Exception as e:
            logger.error(f"发送群聊图片异常: {e}")
            return False

    async def send_group_news(
        self,
        chat_id: str,
        title: str,
        description: str,
        url: str = "",
        picurl: str = "",
    ) -> bool:
        """发送图文（news）消息到群聊"""
        if not self._enabled:
            return False
        try:
            access_token = await self._get_access_token()
            article = {
                "title": title,
                "description": description,
                "url": url or "https://work.weixin.qq.com",
            }
            if picurl:
                article["picurl"] = picurl

            msg = {
                "chatid": chat_id,
                "msgtype": "news",
                "news": {"articles": [article]},
            }
            api_url = f"https://qyapi.weixin.qq.com/cgi-bin/appchat/send?access_token={access_token}"
            async with httpx.AsyncClient(timeout=10) as client:
                resp = await client.post(api_url, json=msg)
                data = resp.json()
            if data.get("errcode") != 0:
                logger.error(f"群聊图文发送失败: {data}")
                return False
            logger.info(f"群聊图文已发送: chatid={chat_id}")
            return True
        except Exception as e:
            logger.error(f"发送群聊图文异常: {e}")
            return False

    async def send_group_alarm_combo(
        self,
        chat_id: str,
        alarm_id: str,
        alarm_type: str,
        area_name: str,
        camera_name: str,
        description: str,
        event_time: str,
        alarm_level: int = 2,
        snapshot_url: str = "",
        mention_user_ids: Optional[List[str]] = None,
    ) -> bool:
        """
        发送告警组合消息到群聊（3条消息）

        1. image: 告警截图
        2. news: 告警详情图文卡片
        3. text: @相关人员提醒处理
        """
        if not self._enabled:
            return False

        type_name = ALARM_TYPE_NAMES.get(alarm_type, alarm_type)
        level_name = ALARM_LEVEL_NAMES.get(alarm_level, "一般")
        success = True

        # ---- 1. 发送告警截图（image 消息） ----
        if snapshot_url:
            media_id = await self.upload_media_from_url(snapshot_url)
            if media_id:
                sent = await self.send_group_image(chat_id, media_id)
                if not sent:
                    success = False
                    logger.warning(f"群聊截图发送失败: alarm={alarm_id}")
            else:
                logger.warning(f"截图上传企微失败，跳过图片消息: alarm={alarm_id}")

        # ---- 2. 发送告警详情（news 图文卡片） ----
        news_title = f"【{level_name}】{type_name}告警"
        news_desc = (
            f"{description}\n\n"
            f"告警区域：{area_name or '未知区域'}\n"
            f"摄像头：{camera_name or '未知'}\n"
            f"告警时间：{event_time}\n"
            f"告警ID：{alarm_id}"
        )
        # news 卡片的 picurl 可用 COS 预签名 URL（缩略图）
        sent = await self.send_group_news(
            chat_id=chat_id,
            title=news_title,
            description=news_desc,
            picurl=snapshot_url if snapshot_url and snapshot_url.startswith("http") else "",
        )
        if not sent:
            success = False

        # ---- 3. @相关人员（text 消息） ----
        if mention_user_ids:
            mentions = " ".join(f"<@{uid}>" for uid in mention_user_ids)
            text_content = f"{mentions} 请及时处理以上{type_name}告警"
            sent = await self.send_group_text(chat_id, text_content)
            if not sent:
                success = False

        if success:
            logger.info(f"群聊组合消息已发送: alarm={alarm_id}, chatid={chat_id}")
        return success


# 全局单例
_wechat_service: Optional[WeChatService] = None


def get_wechat_service() -> WeChatService:
    global _wechat_service
    if _wechat_service is None:
        _wechat_service = WeChatService()
    return _wechat_service