const wxpay = require('../pay/wechat_pay');
const sysUser = require('../db/fuxi/sys_user');
const course = require('../db/models/course');
const order = require('../db/models/order');
const inviter = require('../db/models/inviter');
const sseClient = require('./sse_client');
const { onError, createTradeNo, onSuccess, fixPrice } = require('../utils');
const { isProd, host, ORDER_STATUS } = require('../server/config');
const { Op } = require('sequelize');
const _ = require('lodash');

const API = {
  async buyCourse(obj) {
    const { uid, cid, code = '' } = obj;
    const cdata = await course.findOne({ where: { id: cid } });
    if (!cdata) {
      return onError('课程不存在');
    }
    const edata = await order.findOne({
      where: { cid, uid, status: { [Op.in]: [ORDER_STATUS.已支付, ORDER_STATUS.渠道] } },
    });
    if (edata) {
      return onError('课程已购买');
    }
    const { title, oprice, detailimg, recordId } = cdata;
    let { price } = cdata;
    let discount = '';
    if (code) {
      const idata = await inviter.findOne({ where: { code } });
      if (idata) {
        price = fixPrice(price * idata.discount);
        discount = idata.discount;
      }
    }
    const id = createTradeNo();
    const odata = await order.create({
      id,
      cid,
      uid,
      title,
      detailimg,
      price,
      recordId,
      discount,
      code,
    });
    if (!parseFloat(price)) {
      await API.buySuccess(
        {
          trade_state: 'SUCCESS',
          out_trade_no: id,
        },
        false
      );
      return onSuccess({ id });
    }
    const wdata = await wxpay.transactions_native({
      description: title,
      out_trade_no: id,
      amount: {
        total: isProd() ? Math.ceil(price * 100) : 1,
      },
      notify_url: `${host}/external/pay/notice`,
      // total: 1,
    });
    if (!wdata.code_url) {
      return onError(wdata);
    }
    return onSuccess({
      id,
      url: wdata.code_url,
    });
  },
  // 购买结果轮训
  async buyCheck(oid) {
    const { data: odata } = await order.findOne({ id: oid });
    if (!odata) {
      return onError('订单不存在');
    }
    return onSuccess(odata.status === ORDER_STATUS.已支付);
  },
  async buySuccess(obj, decode = true) {
    let data = obj;
    if (decode) {
      // eslint-disable-next-line camelcase
      const { original_type, algorithm, ciphertext, associated_data, nonce } = obj;
      data = wxpay.decipher_gcm(ciphertext, associated_data, nonce);
    }
    if (data.trade_state !== 'SUCCESS') {
      return;
    }
    const { out_trade_no: id } = data;
    const odata = await order.findOne({ where: { id } });
    if (!odata || odata.payAt) {
      return;
    }
    await order.update(
      {
        payAt: new Date(),
        status: ORDER_STATUS.已支付,
      },
      { where: { id } }
    );
    if (sseClient[id]) {
      sseClient[id].send('done');
      sseClient[id].close();
    }
  },
  async inviteCheck(obj) {
    const { code, cid } = obj;
    const idata = await inviter.findOne({ where: { code } });
    if (!idata) {
      return onError('邀请码不存在');
    }
    const cdata = await course.findOne({ where: { id: cid } });
    const { price: oprice } = cdata;
    const price = fixPrice(oprice * idata.discount);
    const discountPrice = fixPrice(oprice - price);
    return onSuccess({
      price,
      discountPrice,
      ..._.pick(idata, ['name', 'discount']),
    });
  },
};

module.exports = API;