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

//
class AfterSaleService extends CrudService {
  constructor(ctx) {
    super(ctx, 'aftersale');
    this.model = this.ctx.model.Trade.AfterSale;
    this.orderDetailModel = this.ctx.model.Trade.OrderDetail;
    this.orderModel = this.ctx.model.Trade.Order;
    this.goodsSpecModel = this.ctx.model.Shop.GoodsSpec;
    this.configModel = this.ctx.model.System.Config;
    this.orderDetailService = this.ctx.service.util.orderDetail;
    this.tran = new Transaction();
  }
  /**
   * 售后申请
   ** 售后申请有几种:取消订单; 拒收; 退款; 退货; 换货
   ** 取消订单:发货之前,付款之后: 买家申请, 卖家同意之后,直接处理退款即可(退回库存,券影响的所有商品全额退款,则退券)
   ** 拒收: 发货之后,收货之前;买家申请,卖家同意. 直到卖家 确认结束 售后,钱才退回给买家;(退回库存,券影响的所有商品全额退款,则退券)
   ** 退款:收货之后;买家申请,卖家同意.当即退钱,自动结束(退钱,券影响的所有商品全额退款,则退券)
   ** 退货:收货之后;买家申请,卖家同意.直到卖家 确认结束 售后,钱才退回给买家(退钱,退库存,券影响的所有商品全额退款,则退券)
   ** 换货:收货之后;买家申请,卖家同意.双方填写各自的单号. 买卖双方确认收货 后 售后结束(没什么变化?库存-x?)
   * @param {Object} body 售后信息
   */
  async create(body) {
    const { order_detail, goods: goods_id, set_id, type, ...others } = body;
    if (!order_detail) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到订单信息');
    const orderDetail = await this.orderDetailModel.findById(order_detail);
    if (!orderDetail) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到订单信息');
    // 查看该商品是否已经申请售后
    let goods;
    const hasData = await this.model.count({ order_detail, set_id, 'goods._id': goods_id, status: { $nin: [ '!1', '!2', '!3', '!4', '!5' ] } });
    if (hasData > 0) throw new BusinessError(ErrorCode.DATA_EXISTED, '该商品已有正在处理中的售后申请.请勿重复申请');
    if (type !== '4' && type !== '5') {
      const { goods: goodsList } = orderDetail;
      goods = goodsList.find(f => {
        const { is_set = '1' } = f;
        if (!set_id && is_set === '1') return ObjectId(f._id).equals(goods_id);
        return set_id === f.set_id;
      });
      // 套装的数据处理
      if (set_id && _.get(goods, 'set_id') === set_id) {
        const { buy_num } = goods;
        const setData = goods.goods.find(f => _.get(f, 'spec._id') === goods_id);
        if (setData) {
          const { spec, goods: sg } = setData;
          const newGoods = { ...spec, buy_num, goods: sg };
          goods = newGoods;
        }
      }
      if (!goods) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未在当前订单中搜索到要售后的商品');
    } else {
      const realPay = await this.ctx.service.util.orderDetail.computedRealPay(orderDetail);
      others.money = realPay;
      others.desc = type === '4' ? '取消订单' : '拒收商品';
    }
    const { shop, customer } = orderDetail;
    const apply_time = moment().format('YYYY-MM-DD HH:mm:ss');
    this.orderDetailService.turn$numberDecimalToNumber(goods);
    const obj = { order_detail, customer, shop, goods, type, ...others, apply_time, status: '0', set_id };
    const res = await this.model.create(obj);
    const msgData = { source_id: res._id, type: '0' };
    try {
      await this.ctx.service.shop.shopNotice.remindToAfterSale(msgData);
    } catch (error) {
      const errobj = error;
      await this.ctx.service.util.email.errorEmail(errobj);
    }
  }

  async update(filter, update) {
    assert(filter);
    assert(update);
    const { _id, id } = filter;
    if (_id || id) filter = { _id: ObjectId(_id || id) };
    // 检查数据是否存在
    const entity = await this.model.findOne(filter).exec();
    if (!entity) throw new BusinessError(ErrorCode.DATA_NOT_EXIST);
    try {
      // 先处理数据,数据处理对了,需要退钱再退钱
      const { type } = entity;
      const { status } = update;
      // 没有修改状态,那就直接走修改返回
      if (!status) {
        entity.set(update);
        await entity.save();
        return;
      }
      // 退款信息,有内容就是要退款,没有内容(undefined)就是不需要退款
      let refundInfo;
      // 要修改成的状态
      const uStatus = _.get(update, 'status');
      // 根据类型不同,处理的函数不一样.
      if (type === '1') {
        // 仅退款,退优惠券,退款
        // 如果不是处理中,则不进行退款
        if (_.get(update, 'status') === '1') {
          // 1.检验并组织退款信息
          refundInfo = await this.toReturnMoney(entity, update, this.tran);
          // 2.检查是否退优惠券,该退就退
          await this.toReturnCoupons(entity, update, this.tran);
          // 3.修改数据, 直接修改成退完款的状态.如果后面退款失败了.直接回滚了
          update.status = '-1';
          update.end_time = moment().format('YYYY-MM-DD HH:mm:ss');
        } else if (_.get(update, 'status') === '!1') {
          update.end_time = moment().format('YYYY-MM-DD HH:mm:ss');
        }
        // 4.修改订单状态
        await this.refundOrder(entity, this.tran);
      } else if (type === '2') {
        // 退货(退库存),退款,退优惠券
        // 做记录,但是不是结束状态,都不退
        if (uStatus === '-2') {
          // 1.检验并组织退款信息
          refundInfo = await this.toReturnMoney(entity, update, this.tran);
          // 2.检查是否退优惠券
          await this.toReturnCoupons(entity, update, this.tran);
          // 3.修改订单状态
          await this.refundOrder(entity, this.tran);
          // 结束时间
          update.end_time = moment().format('YYYY-MM-DD HH:mm:ss');
        } else if (uStatus === '!2') {
          update.end_time = moment().format('YYYY-MM-DD HH:mm:ss');
        }
      } else if (type === '3') {
        // 换货,不需要退款
        // 但需要检查买卖双方的快递是否签收,都签收的话,需要将状态改为结束
        const uto = _.get(update, 'transport', {});
        const eto = _.get(entity, 'transport', {});
        // 有关快递的字段整合,将传来的和以前的放在一起.然后找是否签收
        const to = { ...eto, ...uto };
        const cr = _.get(to, 'customer_receive');
        const sr = _.get(to, 'shop_receive');
        if (cr && sr) {
          update.status = '-3';
          update.end_time = moment().format('YYYY-MM-DD HH:mm:ss');
        } else if (uStatus === '!3') {
          update.end_time = moment().format('YYYY-MM-DD HH:mm:ss');
        }
      } else if (type === '4') {
        // 取消订单: 退钱,退货(退库存)----不过不需要有快递信息,没发货,退优惠券
        // 没有商品,只有拆分的订单号,用这个去退
        if (uStatus === '4') {
          refundInfo = await this.returnOrder(entity, this.tran);
          update.status = '-4';
        }
        update.end_time = moment().format('YYYY-MM-DD HH:mm:ss');
      } else if (type === '5') {
        // 拒收: 退钱, 退货
        // 如果状态不是完成,那就不退,只是数据修改
        if (uStatus === '-5') {
          refundInfo = await this.returnOrder(entity, this.tran);
          update.end_time = moment().format('YYYY-MM-DD HH:mm:ss');
        } else if (uStatus === '!5') {
          update.end_time = moment().format('YYYY-MM-DD HH:mm:ss');
        }
      } else throw new BusinessError(ErrorCode.DATA_INVALID, '未知的售后类型,无法处理');
      // 售后处理人的添加
      if (update.status !== '0') {
        const admin = this.ctx.admin;
        update.deal_person = admin._id;
      }
      // 修改数据
      this.tran.update('AfterSale', entity._id, update);
      await this.tran.run();
      // 退钱
      if (!refundInfo) return;
      // console.log(refundInfo);
      const res = await this.ctx.service.trade.pay.refund(refundInfo);
      if (res.errcode && res.errcode !== 0) throw new BusinessError(ErrorCode.SERVICE_FAULT, res.errmsg);
    } catch (error) {
      console.error(error);
      await this.tran.rollback();
      throw new BusinessError(ErrorCode.SERVICE_FAULT, '售后:修改失败');
    } finally {
      this.tran.clean();
    }
  }

  /**
   * 售后退钱
   **组织退钱的请求参数即可,没啥需要改的
   * @param {Object} data 售后修改前的数据
   * @param {Object} update 要修改的数据
   * @param {Transaction} tran 数据库事务
   */
  async toReturnMoney(data, update, tran) {
    const { order_detail, goods, set_id } = data;
    const orderDetail = await this.orderDetailModel.findById(order_detail);
    if (!orderDetail) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到订单信息');
    // 取出订单详情的每种商品规格的价格明细
    const moneyDetail = this.ctx.service.util.orderDetail.moneyDetail(orderDetail);
    // 根据订单类型使用价格的key
    const priceKey = 'grp';
    let returnMoney = 0;
    let goodsRealPay = 0;
    if (!set_id) {
      // 商品实际支付的金额
      goodsRealPay = _.get(moneyDetail, `${goods._id}.${priceKey}`);
    } else {
      // 商品实际支付的金额
      goodsRealPay = _.get(moneyDetail, `${set_id}.${priceKey}`);
    }
    // 需要退还的金额,如果传来的数据有金额,就使用传来的,没有的话就用原来的
    returnMoney = _.get(update, 'money', _.get(data, 'money'));
    if (goodsRealPay < returnMoney) throw new BusinessError(ErrorCode.DATA_INVALID, '退款金额超出该商品支付的金额');

    // 组成退款单号
    const { order: order_id } = orderDetail;
    const order = await this.orderModel.findById(order_id);
    if (!order) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到支付订单信息');
    const order_no = _.get(order, 'pay.pay_no');
    if (!order_no) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到微信支付订单号');
    const str = this.ctx.service.util.trade.createNonceStr();
    const out_refund_no = `${order_no}-r-${str}`;
    const refundInfo = { reason: _.get(data, 'desc', '购物退款'), money: returnMoney, order_no, out_refund_no };
    // 退积分
    await this.ctx.service.user.point.refundOrderPoint(order_detail, tran);
    // 退商铺的入账流水金额
    await this.ctx.service.shop.shopInBill.createByAfterSale(data, returnMoney, tran);
    await this.ctx.service.user.cashBack.refund(data, tran);
    return refundInfo;
  }
  /**
   * 售后退优惠券
   **回溯至支付订单,检查每张优惠券影响的商品 及 当前售后的商品 是否都 全额退款
   **如果优惠券影响的商品全额退款,那就退还优惠券;
   **如果有一个没有退款 或者 全额退款,那优惠券就不退
   * @param {Object} data 售后修改前的数据
   * @param {Object} update 要修改的数据
   * @param {Transaction} tran 数据库事务
   */
  async toReturnCoupons(data, update, tran) {
    const orderDetail = await this.orderDetailModel.findById(data.order_detail);
    if (!orderDetail) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到订单信息');
    const { order: order_id } = orderDetail;
    const order = await this.orderModel.findById(order_id);
    if (!order) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到支付订单信息');
    const odList = await this.orderDetailModel.find({ order: order_id });
    // 已退款记录
    const goodsRefundList = [];
    // 在下面处理已退款记录中,应该把当前的这个售后项,作为已处理售后
    const tasq = { order_detail: data.order_detail, 'goods._id': _.get(data, 'goods._id'), status: [ '-1', '-2' ] };
    const asdd = JSON.parse(JSON.stringify(data));
    if (_.get(update, 'money')) asdd.money = _.get(update, 'money');
    const tr = await this.checkIsAllRefund(data);
    // 如果当前商品的售后都不满足全额退款条件.那就别往后查了
    if (tr) goodsRefundList.push(tasq);
    else return;
    for (const od of odList) {
      const { goods, _id: order_detail } = od;
      // 组合成查售后的条件
      // 然后查这些商品有没有退款审核成功的记录, 且只有退全款的商品才能退券
      const afterSaleQuerys = goods.map(i => ({ order_detail, 'goods._id': i._id, status: [ '-1', '-2' ] }));
      for (const asq of afterSaleQuerys) {
        const asd = await this.model.findOne(asq);
        if (asd) {
          const r = await this.checkIsAllRefund(asd);
          if (r) goodsRefundList.push(asq);
        }
      }
    }
    // 获取支付单的优惠明细
    const dd = _.get(order, 'total_detail.discount_detail', {});
    for (const uc_id in dd) {
      // uc_id 用户领取优惠券的id
      // 该优惠券影响的商品id列表
      const goodsIds = Object.keys(_.get(dd, uc_id, {}));
      // 然后在已退款/退货记录中找,这个优惠券影响的商品是否都退款了.退全额
      const r = goodsIds.every(i => goodsRefundList.find(f => i === f['goods._id']));
      if (r) {
        // 说明这个优惠券影响的商品都退了,这个优惠券也就能退了
        tran.update('UserCoupon', uc_id, { status: '0' });
      }
    }
  }
  /**
   * 售后:修改拆分订单
   * @param {Object} data 售后修改前的数据
   * @param {Transaction} tran 数据库事务
   */
  async refundOrder(data, tran) {
    const { order_detail } = data;
    const orderDetail = await this.orderDetailModel.findById(order_detail);
    if (!orderDetail) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到订单信息');
    // 获取拆分订单的数据,并找到商品列表
    const goodsList = _.get(orderDetail, 'goods');
    // 依次找这些商品是否都售后完成,都售后完成,就改订单状态
    const asList = await this.model.find({ order_detail, status: { $nin: [ '0', '!1', '!2', '!3', '!4', '!5' ] } });
    let status;
    let fl = [];
    // 将当前数据添加进去
    fl.push({ goods: _.get(data, 'goods._id'), status: 'finish' });
    for (const gs of goodsList) {
      const { set_id } = gs;
      if (!set_id) {
        const r = asList.find(f => ObjectId(_.get(f, 'goods._id')).equals(_.get(gs, '_id')));
        if (r) {
          const finishList = [ '-1', '-2', '-3', '-4', '-5' ];
          if (finishList.includes(r.status)) fl.push({ goods: gs._id, status: 'finish' });
        }
      } else {
        const { goods } = gs;
        for (const i of goods) {
          const { spec } = i;
          const goods_id = _.get(spec, '_id');
          const r = asList.find(f => f.set_id === set_id && _.get(f, 'goods._id') === goods_id);
          if (r) {
            const finishList = [ '-1', '-2', '-3', '-4', '-5' ];
            if (finishList.includes(r.status)) fl.push({ set_id, goods: goods_id, status: 'finish' });
          }
        }
      }
    }
    fl = _.uniqBy(fl, 'goods');
    // 说明所有的商品 都有 已处理的售后
    if (fl.length === goodsList.length) status = '-4';
    // 有状态码,则修改订单的状态
    if (status) {
      tran.update('OrderDetail', order_detail, { status });
    }
  }

  /**
   * 售后 取消订单 & 拒收处理完成
   * @param {Object} data 售后修改前的数据
   * @param {Transaction} tran 数据库事务
   */
  async returnOrder(data, tran) {
    // 1.退钱
    const { order_detail } = data;
    const orderDetail = await this.orderDetailModel.findById(order_detail);
    if (!orderDetail) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到订单信息');
    const order_id = _.get(orderDetail, 'order');
    const goodsList = _.get(orderDetail, 'goods');
    const order = await this.orderModel.findById(order_id);
    if (!order) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到支付订单信息');
    this.tran.update('OrderDetail', order_detail, { status: '-1' });
    // 实付的钱
    const realPay = await this.ctx.service.util.orderDetail.computedRealPay(orderDetail);
    // 组成退款单号
    const str = this.ctx.service.util.trade.createNonceStr();
    const order_no = _.get(order, 'pay.pay_no');
    const out_refund_no = `${order_no}-r-${str}`;
    const refundInfo = { reason: _.get(data, 'desc'), money: realPay, order_no, out_refund_no };
    // 2.退卷
    // 查找支付订单拆分的所有订单.不包含当前要退的单.默认当前要退的单是全都退了的,只检查其他拆分的就可以
    const odList = await this.orderDetailModel.find({ order: order_id, _id: { $ne: ObjectId(order_detail) } });
    const goodsRefundList = [];
    // 将这个单内的商品加入满足全额退款的商品列表中
    for (const g of goodsList) {
      const obj = { order_detail, 'goods._id': g._id };
      goodsRefundList.push(obj);
    }
    for (const od of odList) {
      const { goods, _id: order_detail } = od;
      // 组合成查售后的条件
      // 然后查这些商品有没有退款审核成功的记录, 且只有退全款的商品才能退券
      const afterSaleQuerys = goods.map(i => ({ order_detail, 'goods._id': i._id, status: [ '-1', '-2' ] }));
      for (const asq of afterSaleQuerys) {
        const asd = await this.model.findOne(asq);
        if (asd) {
          const r = await this.checkIsAllRefund(asd);
          if (r) goodsRefundList.push(asq);
        }
      }
    }
    // 获取支付单的优惠明细
    const dd = _.get(order, 'total_detail.discount_detail', {});
    for (const uc_id in dd) {
      // uc_id 用户领取优惠券的id
      // 该优惠券影响的商品id列表
      const goodsIds = Object.keys(_.get(dd, uc_id, {}));
      // 然后在已退款/退货记录中找,这个优惠券影响的商品是否都退款了.退全额
      const r = goodsIds.every(i => goodsRefundList.find(f => i === f['goods._id']));
      if (r) {
        // 说明这个优惠券影响的商品都退了,这个优惠券也就能退了
        tran.update('UserCoupon', uc_id, { status: '0' });
      }
    }
    // 3.退库存
    for (const g of goodsList) {
      const { _id, buy_num } = g;
      const goodsSpec = await this.goodsSpecModel.findById(_id);
      if (!goodsSpec) continue;
      const { num } = goodsSpec;
      const newNum = this.ctx.plus(buy_num, num);
      this.tran.update('GoodsSpec', goodsSpec._id, { num: newNum });
    }

    return refundInfo;
  }
  /**
   * 判断是否全额退的商品
   * @param {Object} data 售后数据
   * @return {Boolean}
   */
  async checkIsAllRefund(data) {
    // 商品有退款审核通过的记录,查询每个商品是否退的是全款
    // money: 实际退款的金额
    const { money } = data;
    const od_id = _.get(data, 'order_detail');
    const goods_id = _.get(data, 'goods._id');
    const moneyDetail = await this.computedGoodsForRefund({ order_detail: od_id, goods_id });
    if (moneyDetail) {
      const { payTotal } = moneyDetail;
      if (this.ctx.minus(payTotal, money) === 0) {
        // 添加到已退款的列表中
        return true;
      }
    }
  }

  /**
   * 计算商品退货的金额最大值
   * @param {Object} body 参数体
   * @param body.order_detail 订单详情id
   * @param body.goods_id 商品id/套装id
   */
  async computedGoodsForRefund({ order_detail, goods_id }) {
    const orderDetail = await this.orderDetailModel.findById(order_detail);
    if (!orderDetail) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到订单信息');
    const moneyDetail = this.ctx.service.util.orderDetail.moneyDetail(orderDetail);
    const gmd = _.get(moneyDetail, goods_id);
    const obj = {};
    obj.payTotal = _.get(gmd, 'grp');
    obj.goodsTotal = _.get(gmd, 'st');
    obj.freightTotal = _.get(gmd, 'ft');
    obj.discountTotal = _.get(gmd, 'dt');
    return obj;
    // const goodsTotal =
    // const goods = orderDetail.goods.find(f => f._id === goods_id);
    // // 货物支付金额, 数量*购买数量+ 数量*运费 - 优惠
    // const goodsTotal = this.ctx.multiply(goods.sell_money, goods.buy_num);
    // const freightTotal = this.ctx.multiply(goods.freight, goods.buy_num);
    // let discountTotal = 0;
    // const { total_detail = {} } = orderDetail;
    // const { discount_detail = {} } = total_detail;
    // for (const dd in discount_detail) {
    //   const dm = _.get(discount_detail, `${dd}.${goods_id}`, 0);
    //   discountTotal = this.ctx.plus(discountTotal, dm);
    // }
    // const payTotal = this.ctx.minus(this.ctx.plus(goodsTotal, freightTotal), discountTotal);
    // const obj = { payTotal, goodsTotal, freightTotal, discountTotal };
    // return obj;
  }

  /**
   * 退单
   * @param {Object} body 参数体
   * @param body.order_detail 订单详情id
   * @param body.desc 退单理由
   */
  async orderCancel({ order_detail, desc }) {
    // 查询要退的订单
    const orderDetail = await this.orderDetailModel.findById(order_detail);
    if (!orderDetail) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到订单信息');
    const { customer } = orderDetail;
    const basic = { order_detail, customer, type: '1', desc };
    const moneyDetail = this.ctx.service.util.orderDetail.moneyDetail(orderDetail);
    let priceKey;
    if (_.get(orderDetail, 'type') === '1') priceKey = 'ggrp';
    else priceKey = 'grp';
    for (const goods_id in moneyDetail) {
      const d = _.get(moneyDetail, goods_id, {});
      const money = _.get(d, priceKey, 0);
      const obj = { ...basic, goods_id, money };
      await this.create(obj);
    }
  }

  async fetch(filter) {
    assert(filter);
    filter = await this.beforeFetch(filter);
    const { _id, id } = filter;
    if (_id || id) filter = { _id: ObjectId(_id || id) };
    const { populate } = this.getRefMods();
    let res = await this.model.findOne(filter).populate(populate).exec();
    res = await this.afterFetch(filter, res);
    return res;
  }

  /**
   * 查询售后快递
   * @param {Object} query 查询参数
   * @param {String} query.id 售后id
   */
  async getTransportInfo({ id }) {
    const data = await this.model.findById(id);
    if (!data) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到售后数据');
    const { transport } = data;
    if (!transport) return;
    const { customer_transport_no, customer_transport_type, shop_transport_no, shop_transport_type } = transport;
    const result = {};
    if (customer_transport_no && customer_transport_type) {
      const q = { no: customer_transport_no, type: customer_transport_type };
      const customer = await this.ctx.service.util.kd100.search(q);
      result.customer = customer;
    }
    if (shop_transport_no && shop_transport_type) {
      const q = { no: shop_transport_no, type: shop_transport_type };
      const shop = await this.ctx.service.util.kd100.search(q);
      result.shop = shop;
    }
    return result;
  }

  async canRefund({ id }) {
    const od = await this.orderDetailModel.findById(id, { buy_time: 1 }).lean();
    if (!od) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到订单数据');
    const config = await this.configModel.findOne({}, { reward_day: 1 }).lean();
    const rd = _.get(config, 'reward_day', 14);
    const min = this.ctx.multiply(rd, this.ctx.multiply(24, 60));
    const buy_time = _.get(od, 'buy_time');
    const m = moment().diff(buy_time, 'm');
    const r = m < min;
    return r;
  }
}

module.exports = AfterSaleService;