'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 random = require('string-random');
const moment = require('moment');
const crypto = require('crypto');
const xml2js = require('xml2js');
const fs = require('fs');
// wxpay
class WxpayService extends CrudService {
  constructor(ctx) {
    super(ctx, 'wxpay');
    this.appInfo = this.app.config.appInfo;
    this.redis = this.app.redis;
    this.model = this.ctx.model.Card;
    this.cashModel = this.ctx.model.Cash;
    this.cashError = this.ctx.model.CashError;
  }

  async toAuth({ code, id }) {
    const token = await this.redis.get(id);
    if (token) return;
    const url = `https://api.weixin.qq.com/sns/jscode2session?appid=${this.appInfo.id}&secret=${this.appInfo.secret}&js_code=${code}&grant_type=authorization_code`;
    const res = await this.ctx.curl(url, {
      method: 'get',
      dataType: 'json',
    });
    const info = JSON.stringify(res.data);
    await this.redis.set(id, info, 'EX', 3600);

  }

  async cash({ id, money, points }) {
    money = parseInt(money);
    const token = await this.redis.get(id);
    if (!token) throw new BusinessError(ErrorCode.SERVICE_FAULT, '未找到用户的openid,请重新登陆小程序!');
    const { openid } = JSON.parse(token);
    if (!this.appInfo) throw new BusinessError(ErrorCode.FILE_FAULT, '未设置小程序相关设置');
    const user = await this.model.findById(id);
    if (!user) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到用户信息!');
    const opoints = _.get(user, 'points', 0);
    const pres = _.subtract(opoints, points);
    if (pres < 0) throw new BusinessError(ErrorCode.BADPARAM, '积分不足');
    // check_name:校验真名,暂不校验
    const object = { amount: money, check_name: 'NO_CHECK', desc: '提现', mch_appid: this.appInfo.id, mchid: this.appInfo.store, nonce_str: random(16), openid, partner_trade_no: `cash${moment().format('YYYYMMDDHHmmss')}${random(12)}`, re_user_name: user.name };
    const clientIp = _.get(this.ctx.request, 'header.x-real-ip');
    if (clientIp) object.spbill_create_ip = clientIp;
    const sign = this.turnToSign(object);
    const xml = ` <xml>
      <mch_appid>${this.appInfo.id}</mch_appid>
      <mchid>${this.appInfo.store}</mchid>
      <nonce_str>${object.nonce_str}</nonce_str>
      <partner_trade_no>${object.partner_trade_no}</partner_trade_no>
      <openid>${openid}</openid>
      <check_name>NO_CHECK</check_name>
      <re_user_name>${user.name}</re_user_name>
      <amount>${money}</amount>
      <desc>提现</desc>
      ${clientIp ? '<spbill_create_ip></spbill_create_ip>' : ''}
      <sign>${sign}</sign>
    </xml>`;
    const url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers';
    const res = await this.ctx.curl(url, {
      method: 'post',
      data: xml,
      dataType: 'xml',
      key: fs.readFileSync('cert/apiclient_key.pem'),
      cert: fs.readFileSync('cert/apiclient_cert.pem'),
    });
    const data = res.data;
    const parse = new xml2js.Parser({ trim: true, explicitArray: false, explicitRoot: false });
    const result = await parse.parseStringPromise(data);
    // TODO 添加错误记录
    const { return_code, return_msg, result_code, err_code, err_code_des } = result;
    // 请求是否成功
    if (return_code !== 'SUCCESS') {
      this.cashError.create({ word: `${return_code}:${return_msg}`, create_time: moment().format('YYYY-MM-DD HH:mm:ss') });
      throw new BusinessError(ErrorCode.SERVICE_FAULT, `${return_code}:${return_msg}`);
    }
    // 请求失败具体问题
    if (result_code === 'FAIL') {
      this.cashError.create({ word: `${err_code}:${err_code_des}`, create_time: moment().format('YYYY-MM-DD HH:mm:ss') });
      throw new BusinessError(ErrorCode.SERVICE_FAULT, `${err_code}:${err_code_des}`);
    }
    // 成功,添加记录=>减去积分
    const cashRecord = { name: user.name, mobile: user.mobile, b_point: opoints, i_point: points, e_point: pres };
    try {
      await this.cashModel.create({ ...cashRecord, create_time: moment().format('YYYY-MM-DD HH:mm:ss') });
    } catch (error) {
      const word = '添加提现记录失败!但钱已转出.';
      this.cashError.create({ word, create_time: moment().format('YYYY-MM-DD HH:mm:ss') });
      throw new BusinessError(ErrorCode.SERVICE_FAULT, word);
    }
    user.points = pres;
    try {
      await user.save();
    } catch (error) {
      const word = '用户减掉已转出积分失败!钱已转出;提现记录已添加';
      this.cashError.create({ word, create_time: moment().format('YYYY-MM-DD HH:mm:ss') });
      throw new BusinessError(ErrorCode.SERVICE_FAULT, word);
    }
    let newUser = await this.model.findById(id);
    newUser = JSON.parse(JSON.stringify(newUser));
    const { meta, __v, ...userInfo } = newUser;
    return userInfo;
  }

  turnToSign(object) {
    const _arr = [];
    for (const key in object) {
      _arr.push(key + '=' + object[key]);
    }
    const str = `${_arr.join('&')}&key=${this.appInfo.storeKey}`;
    return crypto.createHash('md5').update(str, 'utf8').digest('hex')
      .toUpperCase();

  }

  NoticeCode(code) {
    const arr = [ 'NOTENOUGH', 'SYSTEMERROR', 'NAME_MISMATCH', 'SIGN_ERROR', 'FREQ_LIMIT', 'MONEY_LIMIT', 'CA_ERROR', 'V2_ACCOUNT_SIMPLE_BAN', 'PARAM_IS_NOT_UTF8', 'SENDNUM_LIMIT' ];
    return arr;
  }
}

module.exports = WxpayService;