const ai_service = require('../../../services/ai_service');
const db = require('../../dbProxy');

/**
 * 聊天管理模块
 * 负责沟通列表、沟通详情、发送消息等与设备端的 MQTT 指令对接
 */
class ChatManager {
    /**
     * 解析沟通列表返回值，统一为 { friendList, foldText, ... }
     * 只支持新的结构：
     * response.data = { success, apiData: [ { response: { code, zpData:{...} } } ] }
     * @private
     */
    _parse_chat_list_response(response) {
        const outerData = response && response.data;
        if (!outerData || !Array.isArray(outerData.apiData) || outerData.apiData.length === 0) {
            return { friendList: [], foldText: '', filterEncryptIdList: [], filterBossIdList: [] };
        }

        const firstApi = outerData.apiData[0] || {};
        const innerResp = firstApi.response || firstApi.data || null;
        const raw = innerResp && (innerResp.zpData != null ? innerResp.zpData : innerResp.data);

        if (!raw) {
            return { friendList: [], foldText: '', filterEncryptIdList: [], filterBossIdList: [] };
        }

        return {
            friendList: Array.isArray(raw.friendList) ? raw.friendList : [],
            foldText: raw.foldText || '',
            filterEncryptIdList: Array.isArray(raw.filterEncryptIdList) ? raw.filterEncryptIdList : [],
            filterBossIdList: Array.isArray(raw.filterBossIdList) ? raw.filterBossIdList : []
        };
    }

    /**
     * 获取聊天列表
     * 返回值结构: { friendList, foldText, filterEncryptIdList, filterBossIdList }
     * friendList 每项: friendId, encryptFriendId, name, updateTime, brandName, jobName, jobCity, positionName, bossTitle 等
     * @param {string} sn_code - 设备SN码
     * @param {object} mqttClient - MQTT客户端
     * @param {object} params - 参数
     * @returns {Promise<object>} { friendList, foldText, filterEncryptIdList, filterBossIdList }
     */
    async get_chat_list(sn_code, mqttClient, params = {}) {
        const { platform = 'boss', pageCount = 3 } = params;
        console.log(`[聊天管理] 开始获取设备 ${sn_code} 的聊天列表`);

        const response = await mqttClient.publishAndWait(sn_code, {
            platform,
            action: 'get_chat_list',
            data: { pageCount }
        });

        // 只认新结构：data.success === true
        const ok = !!response && response.data && response.data.success === true;
        if (!ok) {
            console.error(`[聊天管理] 获取聊天列表失败:`, response);
            throw new Error(response?.message || '获取聊天列表失败');
        }

        const parsed = this._parse_chat_list_response(response);


        // 存储数据库


        console.log(`[聊天管理] 成功获取聊天列表，共 ${parsed.friendList.length} 个联系人`);
        return parsed;
    }


    /**
     * 解析 get_chat_detail 设备端返回格式
     * 格式: { type, code, message, data: { success, apiData: { response: { zpData } }, getBossData: { response: { zpData } } } }
     * apiData.response.zpData = 消息列表 hasMore/messages/type/minMsgId
     * getBossData.response.zpData = 会话 data+job
     * @private
     */
    _parse_chat_detail_response(response) {
        if (!response) return { variant: 'unknown', data: null, job: null, hasMore: false, messages: [] };

        const d = response.data;
        const api_data = d && d.apiData;
        const get_boss_data = d && d.getBossData;
        const msg_zp = api_data && api_data.response && api_data.response.zpData;
        const boss_zp = get_boss_data && get_boss_data.response && get_boss_data.response.zpData;

        if (msg_zp && Array.isArray(msg_zp.messages)) {
            return {
                variant: 'messages',
                hasMore: !!msg_zp.hasMore,
                messages: msg_zp.messages,
                type: msg_zp.type,
                minMsgId: msg_zp.minMsgId,
                data: (boss_zp && boss_zp.data) || null,
                job: (boss_zp && boss_zp.job) || null
            };
        }
        if (boss_zp && (boss_zp.data != null || boss_zp.job != null)) {
            return {
                variant: 'session',
                data: boss_zp.data || null,
                job: boss_zp.job || null,
                hasMore: false,
                messages: [],
                type: null,
                minMsgId: null
            };
        }
        return { variant: 'unknown', data: null, job: null, hasMore: false, messages: [] };
    }

    /**
     * 解析详情，统一返回 { variant, hasMore, minMsgId, messages, data, job }
     * 入参可为设备端完整返回（data.apiData/data.getBossData）或已解析对象（直接返回）
     */
    parseDetailResponse(apiResponse) {
        if (apiResponse && (apiResponse.variant === 'messages' || apiResponse.variant === 'session' || apiResponse.variant === 'unknown')) {
            return apiResponse;
        }
        return this._parse_chat_detail_response(apiResponse);
    }

    /**
     * 获取沟通详情（会话信息或聊天消息列表）
     * 返回值: { variant: 'session'|'messages', ... }
     * - session: data(boss/会话信息), job(职位信息)
     * - messages: hasMore, messages[], type, minMsgId
     * @param {string} sn_code - 设备SN码
     * @param {object} mqttClient - MQTT客户端
     * @param {object} params - 参数，如 friendId/encryptBossId/encryptJobId 等，由设备端约定
     * @returns {Promise<object>}
     */
    async get_chat_detail(sn_code, mqttClient, params = {}) {
        const { platform = 'boss', ...rest } = params;
        console.log(`[聊天管理] 开始获取设备 ${sn_code} 的沟通详情`);

        const response = await mqttClient.publishAndWait(sn_code, {
            platform,
            action: 'get_chat_detail',
            data: rest
        });

        const ok = response && (response.code === 200 || response.code === 0);
        if (!ok) {
            console.error(`[聊天管理] 获取沟通详情失败:`, response);
            throw new Error(response?.message || '获取沟通详情失败');
        }
        const parsed = this._parse_chat_detail_response(response);
        const logExtra = parsed.variant === 'session'
            ? '会话'
            : parsed.variant === 'messages'
                ? `消息 ${parsed.messages.length} 条`
                : '未知';
        console.log(`[聊天管理] 成功获取沟通详情 (${logExtra})`);
        return parsed;
    }

    /**
     * 发送聊天消息（支持多条 + 文本/发简历/换电话/换微信）
     * @param {string} sn_code - 设备SN码
     * @param {object} mqttClient - MQTT客户端
     * @param {object} params - friendId(必填), messages(数组), chatType, use_real_type, platform
     * @param {string} params.friendId - 好友ID，用于打开该好友的聊天面板
     * @param {Array} params.messages - 每项为 string 或 { type: 'text'|'send_resume'|'exchange_phone'|'exchange_wechat', content?: string }
     * @param {boolean} params.use_real_type - 是否模拟真实打字，默认 false
     * @returns {Promise<object>} 发送结果
     */
    async send_chat_message(sn_code, mqttClient, params) {
        const { friendId, messages, chatType, use_real_type = false, platform = 'boss' } = params || {};

        if (!friendId) throw new Error('friendId 不能为空');
        if (!Array.isArray(messages) || messages.length === 0) throw new Error('messages 必须是非空数组');

        const normalized_messages = messages.map((item) => {
            if (typeof item === 'string') return { type: 'text', content: item };
            return { type: item.type || 'text', content: item.content || '' };
        });

        console.log(`[聊天管理] 设备 ${sn_code} 发送聊天消息，friendId=${friendId}，条数=${normalized_messages.length}`);

        const response = await mqttClient.publishAndWait(sn_code, {
            platform,
            action: 'send_chat_message',
            data: { friendId, messages: normalized_messages, chatType, use_real_type: !!use_real_type }
        });

        if (!response || (response.code !== 0 && response.code !== 200)) {
            console.error(`[聊天管理] 聊天消息发送失败:`, response);
            throw new Error(response?.message || '聊天消息发送失败');
        }

        console.log(`[聊天管理] 聊天消息发送成功`);
        return response;
    }

    /** 是否为系统/模板消息（竞争者PK、拒绝模板、系统卡片等），不参与回复判断 */
    _isSystemMessage(msg) {
        const body = msg.body || {};
        if (msg.bizType === 317 || msg.bizType === 21050003) return true;
        if (msg.type === 4) return true;
        if (body.type === 16) return true;
        return false;
    }

    /** 过滤出 HR 发的、非系统、可回复的消息列表（已排除自己发的） */
    _filterHrReplyableMessages(messages, geek_uid) {
        if (!geek_uid || !Array.isArray(messages)) return [];
        let list = messages.filter(msg => {
            if (!msg.from || msg.from.uid === geek_uid) return false;
            if (this._isSystemMessage(msg)) return false;
            return true;
        });

        return list

    }

    /** AI 回复后写入 chat_reply_intent_log，options 含 sn_code/platform/friendId/encryptFriendId 时落库 */
    _saveReplyIntentLog(options, hr_message_text, jobInfo, action, reply_content, replied, reason) {
        if (!options || options.sn_code == null) return;
        try {
            const model = db.getModel('chat_reply_intent_log');
            model.create({
                sn_code: options.sn_code || '',
                platform: options.platform || 'boss',
                friendId: options.friendId ?? null,
                encrypt_friend_id: options.encryptFriendId || '',
                hr_message_text: hr_message_text || null,
                action: action || '',
                reply_content: reply_content || null,
                replied: !!replied,
                reason: reason || null,
                job_name: (jobInfo && (jobInfo.jobName || jobInfo.title)) || null,
                create_time: new Date()
            }).catch(e => console.warn('[聊天管理] 写入 chat_reply_intent_log 失败:', e.message));
        } catch (e) {
            console.warn('[聊天管理] 写入 chat_reply_intent_log 失败:', e.message);
        }
    }

    /**
     * 根据沟通详情判断是否需回复，并用 AI 判断意图（文字回复 / 发简历）及生成内容
     * @param {object} detail - 沟通详情，含 variant、messages、job 等
     * @param {object} options - 可选，落库用 { sn_code, platform, friendId, encryptFriendId }
     * @returns {Promise<object>} { replied, action?, reply_content?, hr_message_text?, reason? }
     */
    async getReplyContentFromDetail(detail, options) {
        if (!detail || detail.variant !== 'messages' || !Array.isArray(detail.messages) || detail.messages.length === 0) {
            return { replied: false, reason: '无可用消息' };
        }

        const messages = detail.messages;
        let hr_uid = null;
        let geek_uid = null;

        for (const msg of messages) {
            const body = msg.body || {};
            const jobDesc = body.jobDesc || body.job_desc || null;
            if (jobDesc) {
                if (jobDesc.boss && jobDesc.boss.uid && !hr_uid) hr_uid = jobDesc.boss.uid;
                if (jobDesc.geek && jobDesc.geek.uid && !geek_uid) geek_uid = jobDesc.geek.uid;
            }
            if (hr_uid && geek_uid) break;
        }

        const lastRaw = messages[messages.length - 1];
        if (lastRaw && lastRaw.from && lastRaw.to) {
            hr_uid = hr_uid || lastRaw.from.uid;
            geek_uid = geek_uid || lastRaw.to.uid;
        }

        const jobInfo = detail.job || {};

        const hrList = this._filterHrReplyableMessages(messages, geek_uid);
        if (hrList.length === 0) {
            this._saveReplyIntentLog(options, '', jobInfo, '', '', false, '无HR可回复消息（已过滤系统与己方）');
            return { replied: false, reason: '无HR可回复消息（已过滤系统与己方）' };
        }

        const last = hrList[hrList.length - 1];
        if (!last.from || last.from.uid !== hr_uid) {
            this._saveReplyIntentLog(options, '', jobInfo, '', '', false, '最后一条可回复消息不是HR');
            return { replied: false, reason: '最后一条可回复消息不是HR' };
        }

        const body = last.body || {};
        const hr_message_text =
            (typeof body.text === 'string' && body.text) ||
            (typeof last.pushText === 'string' && last.pushText) ||
            '';


        const { action, reply_content } = await ai_service.replyIntentAndContent({
            jobInfo,
            hrMessage: hr_message_text,
            previousMessages: hrList.slice(-5).map(m => (m.body && m.body.text) || m.pushText || '')
        });


        if (action === 'no_reply') {
            this._saveReplyIntentLog(options, hr_message_text, jobInfo, action, reply_content, false, 'HR表示暂不匹配/无需回复');
            return { replied: false, reason: 'HR表示暂不匹配/无需回复' };
        }

        const needContent = action === 'text';
        if (needContent && (!reply_content || !reply_content.trim())) {
            this._saveReplyIntentLog(options, hr_message_text, jobInfo, action, reply_content, false, 'AI 未生成有效回复文案');
            return { replied: false, reason: 'AI 未生成有效回复文案' };
        }

        this._saveReplyIntentLog(options, hr_message_text, jobInfo, action, reply_content, true, null);
        return {
            replied: true,
            action: action || 'text',
            reply_content: reply_content || '',
            hr_message_text
        };
    }

    /**
     * 使用 AI 自动决定是否回复，并发送回复（内部会先获取详情，再调用 getReplyContentFromDetail，再发送）
     * 单条指令场景用；任务 auto_chat 已改为下发 get_chat_list / get_chat_detail / send_chat_message 多条指令。
     *
     * @param {string} sn_code - 设备SN码
     * @param {object} mqttClient - MQTT客户端
     * @param {object} params - 包含 friendId + 获取详情所需参数
     * @returns {Promise<object>} { replied, reply_content?, hr_message_text?, reason? }
     */
    async auto_reply_with_ai(sn_code, mqttClient, params = {}) {
        const { friendId, platform = 'boss', ...detailParams } = params;
        if (!friendId) throw new Error('friendId 不能为空');

        const parsed = await this.get_chat_detail(sn_code, mqttClient, { platform, ...detailParams });
        const decision = await this.getReplyContentFromDetail(parsed, {
            sn_code,
            platform,
            friendId,
            encryptFriendId: detailParams.encryptFriendId || ''
        });
        if (!decision.replied) return decision;

        const action = decision.action || 'text';
        const content = decision.reply_content || '';
        const actionMessages = {
            send_resume: [{ type: 'send_resume', content }],
            exchange_wechat: [{ type: 'exchange_wechat', content }],
            exchange_phone: [{ type: 'exchange_phone', content }]
        };
        const messages = actionMessages[action] || [{ type: 'text', content }];
        await this.send_chat_message(sn_code, mqttClient, {
            friendId,
            messages,
            chatType: 'reply',
            platform
        });
        return {
            replied: true,
            reply_content: decision.reply_content,
            hr_message_text: decision.hr_message_text
        };
    }
}

module.exports = new ChatManager();