'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 Transaction = require('mongoose-transactions');
//
class OrderDetailService extends CrudService {
  constructor(ctx) {
    super(ctx, 'orderdetail');
    this.model = this.ctx.model.Trade.OrderDetail;
    this.orderModel = this.ctx.model.Trade.Order;
    this.goodsSpecModel = this.ctx.model.Shop.GoodsSpec;
    this.userCouponModel = this.ctx.model.User.UserCoupon;
    this.goodsRateModel = this.ctx.model.Shop.GoodsRate;
    this.afterSaleModel = this.ctx.model.Trade.AfterSale;
    this.platformActModel = this.ctx.model.System.PlatformAct;
    this.tran = new Transaction();
  }
  async searchOrderTransport({ id, goods_id }) {
    const orderDetail = await this.model.findById(id);
    if (!id) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到订单信息');
    const { transport = [] } = orderDetail;
    let toSearch = [];
    if (goods_id) {
      // 传来指定商品,查有该商品的订单,但是如果没有,就查每一项中是否有 shop_transport_no 和 shop_transport_type
      // 如果有这俩属性,说明也有单子,也查出来
      toSearch = transport.filter(f => _.isArray(f.goods) && f.goods.find(fg => fg.goods_id === goods_id));
      if (toSearch.length <= 0) {
        toSearch = transport.filter(f => f.shop_transport_no && f.shop_transport_type);
      }
    } else {
      toSearch = transport;
    }
    const result = [];
    for (const t of toSearch) {
      const { shop_transport_no: no, shop_transport_type: type, goods } = t;
      if (!no || !type) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '缺少快递信息');
      const res = await this.ctx.service.util.kd100.search({ no, type });
      result.push({ ...res, goods });
    }
    return result;
  }

  /**
   * 创建:用户支付完成后的订单
   * @param {Object} body 请求参数体
   * @param body.order_id 下单的id
   * @param {Transaction} tran 数据库事务实例
   */
  async create({ order_id }, tran) {
    assert(order_id, '缺少支付订单信息');
    const order = await this.orderModel.findById(order_id);
    if (!order) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到支付订单的数据');
    // 返现部分
    const { customer, address, goods: shopGoods, no, status, buy_time, pay, total_detail: otd, inviter } = order;
    if (status === '0') throw new BusinessError(ErrorCode.DATA_INVALID, '订单未支付');
    const orderDetailData = { customer, address, order: order_id, buy_time, pay_time: _.get(pay, 'pay_time'), status, inviter };
    const shopMoneyDetail = this.ctx.service.util.order.shopMoneyDetail(order);
    // 分订单计数器
    let noTimes = 1;
    // const list = [];
    const ids = [];
    const groupShop = _.groupBy(shopGoods, 'shop');
    for (const shop in groupShop) {
      const list = groupShop[shop];
      const detailNo = `${no}-${noTimes}`;
      const total_detail = shopMoneyDetail[shop];
      const newGoodsList = [];
      for (const s of list) {
        const { is_set = '1', remarks } = s;
        if (is_set === '1') {
          let goodsList = _.get(s, 'goods', []);
          goodsList = goodsList.map(i => ({ ...i, remarks }));
          // 优惠部分分割
          if (_.get(otd, 'discount_detail')) {
            // 如果有优惠部分,那就得找,优惠里面有没有对应的商品规格
            const discount_detail = this.getGoodsListDiscountDetail(goodsList, _.get(otd, 'discount_detail'));
            total_detail.discount_detail = discount_detail;
          }
          noTimes++;
          newGoodsList.push(...goodsList);
        } else {
          const g = _.pick(s, [ 'name', 'buy_num', 'freight', 'is_set', 'is_use', 'meta', 'sell_money', 'set_id', 'goods', 'remarks' ]);
          g._id = g.set_id;
          newGoodsList.push(g);
        }
      }
      const obj = { ...orderDetailData, shop, no: detailNo, total_detail, goods: newGoodsList };
      const od_id = tran.insert('OrderDetail', obj);
      ids.push(od_id);
    }

    // for (const s of shopGoods) {
    //   const { is_set = '1' } = s;
    //   if (is_set === '1') {
    //     const shop = _.get(s, 'shop');
    //     const remarks = _.get(s, 'remarks');
    //     const goodsList = _.get(s, 'goods', []);
    //     const detailNo = `${no}-${noTimes}`;
    //     const total_detail = shopMoneyDetail[shop];
    //     // 优惠部分分割
    //     if (_.get(otd, 'discount_detail')) {
    //       // 如果有优惠部分,那就得找,优惠里面有没有对应的商品规格
    //       const discount_detail = this.getGoodsListDiscountDetail(goodsList, _.get(otd, 'discount_detail'));
    //       total_detail.discount_detail = discount_detail;
    //     }
    //     noTimes++;
    //     const obj = { ...orderDetailData, shop, goods: goodsList, no: detailNo, total_detail, remarks };
    //     obj.status = '1';
    //     // list.push(obj);
    //     const od_id = tran.insert('OrderDetail', obj);
    //     ids.push(od_id);
    //   } else {
    //     const shop = _.get(s, 'shop');
    //     const detailNo = `${no}-${noTimes}`;
    //     const total_detail = shopMoneyDetail[shop];
    //     const remarks = _.get(s, 'remarks');
    //     const g = _.pick(s, [ 'name', 'buy_num', 'freight', 'is_set', 'is_use', 'meta', 'sell_money', 'set_id', 'goods' ]);
    //     g._id = g.set_id;
    //     const obj = { ...orderDetailData, shop, goods: g, no: detailNo, total_detail, remarks, status: '1' };
    //     const od_id = tran.insert('OrderDetail', obj);
    //     ids.push(od_id);
    //   }
    // }
    return ids;
  }

  /**
   * 将商品规格列表中,优惠的部分提取出来,分单用
   * @param {Array} goodsList 某店的商品列表
   * @param {Object} odd discount_detail 支付订单的优惠券设置
   */
  getGoodsListDiscountDetail(goodsList, odd) {
    const result = {};
    for (const uc_id in odd) {
      const detail = odd[uc_id];
      const obj = {};
      for (const g of goodsList) {
        const { _id } = g;
        const gdd = detail[_id];
        if (gdd) obj[_id] = gdd;
      }
      result[uc_id] = obj;
    }
    return result;
  }

  /**
   * 计算某店铺的金额总计
   * @param {Array} goodsList 商品规格列表
   */
  getTotalDetail(goodsList) {
    const goods_total = goodsList.reduce((p, n) => this.ctx.plus(p, this.ctx.multiply(n.sell_money, n.buy_num)), 0);
    const freight_total = goodsList.reduce((p, n) => this.ctx.plus(p, this.ctx.multiply(n.freight, n.buy_num)), 0);
    return { goods_total, freight_total };
  }

  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).lean();
    res = JSON.parse(JSON.stringify(res));
    if (!res) throw new BusinessError(ErrorCode.DATA_NOT_EXIST);
    // 找售后和评论
    const afterSale = await this.afterSaleModel.find({ order_detail: res._id });
    const rate = await this.goodsRateModel.find({ orderDetail: res._id });
    const goods = _.get(res, 'goods', []);
    for (const g of goods) {
      const { is_set = '1' } = g;
      if (is_set === '1') {
        const r = afterSale.find(f => ObjectId(_.get(f, 'goods._id')).equals(g._id));
        if (r) g.is_afterSale = true;
        else g.is_afterSale = false;
        const r2 = rate.find(f => ObjectId(_.get(f, 'goodsSpec')).equals(g._id));
        if (r2) {
          g.is_rate = true;
          g.rate = r2._id;
        } else g.is_rate = false;
      } else {
        const { set_id, goods } = g;
        for (const i of goods) {
          const { spec } = i;
          const r = afterSale.find(f => f.set_id === set_id && _.get(f, 'goods._id') === _.get(spec, '_id'));
          if (r) i.is_afterSale = true;
          else i.is_afterSale = false;
          const r2 = rate.find(f => f.set_id === set_id && f.goodsSpec === _.get(spec, '_id'));
          if (r2) {
            i.is_rate = true;
            i.rate = r2._id;
          } else i.is_rate = false;
        }
      }
    }
    res.goods = goods;
    // 整理total_detail为列表:让前端显示更方便
    const total_detail = _.get(res, 'total_detail', {});
    res.total_detail = await this.fetchResetTotalDetail(total_detail);
    return res;
  }

  async fetchResetTotalDetail(total_detail) {
    const tarr = [];
    if (_.isNumber(_.get(total_detail, 'goods_total', 0))) tarr.push({ key: 'goods_total', zh: '商品总价', money: _.get(total_detail, 'goods_total', 0) });
    if (_.isNumber(_.get(total_detail, 'freight_total', 0))) tarr.push({ key: 'freight_total', zh: '运费总价', money: _.get(total_detail, 'freight_total', 0) });
    const act = _.get(total_detail, 'act', []);
    for (const a of act) {
      const { platform_act, platform_act_type, discount } = a;
      const text = `满${platform_act_type === '6' ? '折' : '减'}活动`;
      const actData = await this.platformActModel.findById(platform_act);
      const title = _.get(actData, 'act_time.title', text);
      const obj = { key: platform_act, zh: title, money: this.ctx.minus(0, discount) };
      tarr.push(obj);
    }
    const discount_detail = _.get(total_detail, 'discount_detail', {});
    const userCoupons = Object.keys(discount_detail);
    if (userCoupons.length > 0) {
      let dm = 0;
      for (const uc_id of userCoupons) {
        const detail = _.get(discount_detail, uc_id, {});
        const values = Object.values(detail);
        dm = values.reduce((p, n) => this.ctx.minus(p, n), dm);
      }
      tarr.push({ key: 'coupons', zh: '优惠券优惠', money: dm });
    }

    return tarr;
  }

  async query(filter, { skip = 0, limit, sort, desc, projection } = {}) {
    // 处理排序
    if (sort && _.isString(sort)) {
      sort = { [sort]: desc ? -1 : 1 };
    } else if (sort && _.isArray(sort)) {
      sort = sort.map(f => ({ [f]: desc ? -1 : 1 })).reduce((p, c) => ({ ...p, ...c }), {});
    }
    let condition = _.cloneDeep(filter);
    condition = await this.beforeQuery(condition);
    condition = this.dealFilter(condition);
    // 过滤出ref字段
    const pipline = [{ $sort: { 'meta.createdAt': -1 } }];
    pipline.push({ $match: condition });
    // 整理字段
    // 店铺需要的字段
    pipline.push({ $addFields: { shop_id: { $toObjectId: '$shop' } } });
    pipline.push({
      $lookup: {
        from: 'shop',
        localField: 'shop_id',
        foreignField: '_id',
        as: 'shopInfo',
      },
    });
    pipline.push({ $addFields: { customer_id: { $toObjectId: '$customer' } } });
    pipline.push({
      $lookup: {
        from: 'user',
        localField: 'customer_id',
        foreignField: '_id',
        as: 'customerInfo',
      },
    });

    pipline.push({ $unwind: '$shopInfo' });
    pipline.push({ $unwind: '$customerInfo' });
    const lastProject = {
      $project: {
        _id: 1,
        type: 1,
        order: 1,
        buy_time: 1,
        pay_time: 1,
        status: 1,
        no: 1,
        address: 1,
        goods: 1,
        shop: {
          _id: '$shopInfo._id',
          name: '$shopInfo.name',
        },
        customer: {
          _id: '$customerInfo._id',
          name: '$customerInfo.name',
        },
        total_detail: 1,
      },
    };
    pipline.push(lastProject);
    const qPipline = _.cloneDeep(pipline);
    if (parseInt(skip) >= 0) qPipline.push({ $skip: parseInt(skip) });
    if (parseInt(limit)) qPipline.push({ $limit: parseInt(limit) });
    const rs = await this.model.aggregate(qPipline);
    const tPipline = _.cloneDeep(pipline);
    tPipline.push({ $addFields: { id: { $toString: '$_id' } } });
    tPipline.push({ $count: 'id' });
    const t = await this.model.aggregate(tPipline);
    const total = _.get(_.head(t), 'id');
    const list = [];
    for (const i of rs) {
      const { goods, _id: orderDetail } = i;
      const obj = _.cloneDeep(i);
      const real_pay = this.ctx.service.util.orderDetail.computedRealPay(obj);
      obj.real_pay = real_pay;
      obj.buy_num_total = goods.reduce((p, n) => this.ctx.plus(p, n.buy_num), 0);
      for (const og of obj.goods) {
        const { file = [], _id: goodsSpec } = og;
        const gfile = _.get(og, 'goods.file', []);
        const nf = [ ...file, ...gfile ];
        const url = _.get(_.head(nf), 'url');
        og.url = url;
        delete og.file;
        delete og.goods.file;
        // 评价
        const q = { orderDetail, goodsSpec };
        const rate = await this.goodsRateModel.findOne(q, { _id: 1 });
        obj.rate = _.get(rate, '_id');
        obj.price = _.get(obj, 'price', obj.sell_money);
      }
      // 售后
      const asum = await this.afterSaleModel.count({ order_detail: obj._id, status: { $nin: [ '-1', '!1', '-2', '!2', '-3', '!3', '-4', '!4', '-5', '!5' ] } });
      obj.is_afterSale = asum > 0;
      list.push(obj);
    }
    return { data: list, total };
  }

  async update(filter, update, { projection } = {}) {
    // 需要注意不能让order和orderDetail修改total_detail
    assert(filter);
    assert(update);
    const { _id, id } = filter;
    if (_id || id) filter = { _id: ObjectId(_id || id) };
    const entity = await this.model.findOne(filter).exec();
    if (!entity) throw new BusinessError(ErrorCode.DATA_NOT_EXIST);
    try {
      this.tran.update('OrderDetail', filter._id, update);
      if (_.get(update, 'status') === '3') {
        // 积分部分
        await this.ctx.service.user.point.addPoints(filter._id, this.tran);
        // 返现部分
        await this.ctx.service.user.cashBack.create(filter._id, this.tran);
        // 店铺流水部分
        await this.ctx.service.shop.shopInBill.createByOrder(entity, this.tran);
      }

      await this.tran.run();
      const e = await this.model.findOne(filter, projection).exec();
      return e;
    } catch (error) {
      await this.tran.rollback();
    } finally {
      this.tran.clean();
    }
  }
}

module.exports = OrderDetailService;