'use strict';
const { CrudService } = require('naf-framework-mongoose/lib/service');
const { BusinessError, ErrorCode } = require('naf-core').Error;
const _ = require('lodash');
const assert = require('assert');
const moment = require('moment');

// 客服相关
class CustomerService extends CrudService {
  constructor(ctx) {
    super(ctx, 'customer');
    this.mq = this.ctx.mq;
    this.status = this.ctx.model.Status;
    this.record = this.ctx.model.Record;
    this.chatRecord = this.ctx.model.CustomerChat;

    // 1分钟检查1次
    this.time = 1;
    this.unit = 'm';
  }

  /**
   * 发送消息
   * @param {Object} body 参数
   * @property _tenant 项目
   * @property client_id 客户id
   * @property client_name 客户名
   * @property customer_id 客服id
   * @property customer_name 客服名
   * @property sender_id 发送人id
   * @property sender_name 发送人
   * @property content 内容
   */
  async chat(body) {
    const { _tenant, client_id, customer_id } = body;
    assert(_tenant, '缺少项目标识');
    assert(client_id, '缺少客户信息');
    assert(customer_id, '缺少客服信息');
    if (!this.mq) throw new BusinessError(ErrorCode.SERVICE_FAULT, 'mq配置错误');
    body.send_time = moment().format('YYYY-MM-DD HH:mm:ss');
    // 向项目存这条对话数据,再mq执行
    await this.chatRecord.create(body);
    // await this.ctx.service.util.httpUtil.$post('/customerChat', 'hnhmain', body);
    const exchange = _tenant;
    const routeKey = `customer.${client_id}.${customer_id}`;
    const mqBody = JSON.stringify(body);
    const param = { durable: true };
    await this.mq.topic(exchange, routeKey, mqBody, param);
  }

  /**
   * 客服获取正在服务的客户列表
   * @param {Object} query 参数
   */
  async getRecord(query) {
    const { _tenant, customer_id } = query;
    assert(_tenant, '缺少项目标识');
    assert(customer_id, '缺少客服信息');
    const list = await this.record.find(query);
    return list;
  }


  /**
   * 客服登陆/续时,此函数不处理工作状态,只处理时间失效与否
   * @param {Object} query 参数
   */
  async customerLog(query) {
    const { _tenant, customer_id } = query;
    assert(_tenant, '缺少项目标识');
    assert(customer_id, '缺少客服信息');
    let customer = await this.status.findOne({ _tenant, customer_id });
    if (customer) {
      // 该客服已经上线
      customer.logout_time = this.addTime();
      await customer.save();
    } else {
      // 没上线
      const obj = { ...query, status: '0', logout_time: this.addTime() };
      customer = await this.status.create(obj);
    }
    return customer;
  }

  /**
   * 客户咨询,查找指定项目的空闲客服,如果没有,那就找到所有客服,
   * 并且找其同时接待最少的客服,让他接待
   * @param {Object} query 参数
   */
  async clientApply(query) {
    const { _tenant, client_id, client_name } = query;
    assert(_tenant, '缺少项目标识');
    assert(client_id, '缺少客户信息');
    const freeList = await this.status.find({ _tenant, status: '0' });
    let customer;
    if (freeList.length > 0) {
      customer = _.head(freeList);
      // 修改状态,加次时间
      customer.status = '1';
      customer.logout_time = this.addTime();
      await customer.save();
    } else {
      // 没有闲的了,那就找不闲的
      let list = await this.status.find({ _tenant });
      if (list.length > 0) {
        list = JSON.parse(JSON.stringify(list));
        for (const i of list) {
          const { customer_id } = i;
          const num = await this.record.count({ customer_id, _tenant });
          i.num = num;
        }
        list = _.orderBy(list, [ 'num' ], [ 'asc' ]);
        customer = _.head(list);
        customer.status = '1';
        customer.logout_time = this.addTime();
        await this.customerLog({ _tenant, customer_id: customer.customer_id });
      } else return '当前没有客服在线';
    }
    // 添加记录
    const obj = { customer_id: customer.customer_id, customer_name: customer.customer_name, _tenant, client_id, client_name };
    let record = await this.record.findOne(obj);
    if (record) {
      record.out_time = this.addTime();
      await record.save();
    } else {
      obj.out_time = this.addTime();
      record = await this.record.create(obj);
    }

    if (this.mq) {
      const exchange = _tenant;
      const routeKey = `customer.${customer.customer_id}`;
      const mqBody = 'research';
      const param = { durable: true };
      await this.mq.topic(exchange, routeKey, mqBody, param);
    }

    return record;
  }

  /**
   * 客户续时
   * @param {Object} query 参数
   */
  async clientContinue(query) {
    const { _tenant, client_id, customer_id } = query;
    assert(_tenant, '缺少项目标识');
    assert(client_id, '缺少客户信息');
    assert(customer_id, '缺少客服信息');
    const record = await this.record.findOne({ _tenant, client_id, customer_id });
    if (!record) return '服务已经结束';
    record.out_time = this.addTime();
    const r = await record.save();
    if (r) {
      // 同时给客服续航
      await this.customerLog({ _tenant, customer_id });
    }
    return 'ok';
  }

  // 结束服务
  async serverEnd(query) {
    const { _tenant, client_id, customer_id } = query;
    assert(_tenant, '缺少项目标识');
    assert(client_id, '缺少客户信息');
    assert(customer_id, '缺少客服信息');
    await this.record.deleteOne({ _tenant, client_id, customer_id });
    this.checkStatus();
    return 'ok';
  }

  // 查询并修改客服状态
  async checkStatus() {
    const list = await this.status.find();
    for (const i of list) {
      const num = await this.record.count({ customer_id: i._id });
      if (num <= 0) {
        i.status = '0';
        i.save();
      }

    }
  }

  // 定时清理
  async clear() {
    // 所有状态和工作记录,对比失效时间,过了就删了
    console.log('in function:clear');
    await this.status.deleteMany({ logout_time: { $lte: moment().format('YYYY-MM-DD HH:mm:ss') } });
    // await this.record.deleteMany({ out_time: { $lte: moment().format('YYYY-MM-DD HH:mm:ss') } });

  }

  // 续
  addTime() {
    const t = moment().add(this.time, this.unit).format('YYYY-MM-DD HH:mm:ss');
    return t;
  }

}

module.exports = CustomerService;