'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;
//
class OrderService extends CrudService {
  constructor(ctx) {
    super(ctx, 'order');
    this.orderModel = this.ctx.model.Trade.Order;
    this.orderDetailModel = this.ctx.model.Trade.OrderDetail;
    this.shopModel = this.ctx.model.Shop.Shop;
    this.goodsRateModel = this.ctx.model.Shop.GoodsRate;
    this.afterSaleModel = this.ctx.model.Trade.AfterSale;
  }

  async getOrder({ id }) {
    const num = await this.orderModel.count({ _id: id });
    if (num > 0) return this.ctx.service.trade.order.fetch({ id });
    return this.ctx.service.trade.orderDetail.fetch({ id });
  }

  async allOrder(query = {}) {
    const { skip, limit } = query;
    const customer = _.get(this.ctx, 'user._id');
    if (!customer) throw new BusinessError(ErrorCode.NOT_LOGIN);
    const pipeline = [];
    const step1 = [
      { $addFields: { order_id: { $toString: '$_id' } } },
      {
        $lookup: {
          from: 'orderDetail',
          localField: 'order_id',
          foreignField: 'order',
          as: 'orderDetails',
        },
      },
    ];
    pipeline.push(...step1);
    const step2 = [
      {
        $project: {
          data: {
            $cond: {
              if: { $gt: [{ $size: '$orderDetails' }, 0 ] },
              then: '$orderDetails',
              else: '$$CURRENT',
            },
          },
        },
      },
    ];
    pipeline.push(...step2);
    pipeline.push({ $unwind: '$data' });
    pipeline.push({ $replaceRoot: { newRoot: '$data' } });
    pipeline.push({ $match: { customer } });
    const qp = _.cloneDeep(pipeline);
    qp.push({ $sort: { 'meta.createdAt': -1 } });
    if (skip && limit) qp.push({ $skip: parseInt(skip) }, { $limit: parseInt(limit) });
    const data = await this.orderModel.aggregate(qp);
    const tr = await this.orderModel.aggregate([ ...pipeline, { $count: 'total' }]);
    const newArr = [];
    for (const i of data) {
      const { pay, goods } = i;
      let obj = {};
      if (pay) {
        // 这个是order表的数据,需要用order的计算方式
        const buy_num_total = goods.reduce((p, n) => {
          let num = 0;
          if (_.get(n, 'is_set') === '0') num = _.get(n, 'buy_num');
          else {
            const goods = _.get(n, 'goods', []);
            num = goods.reduce((np, nn) => this.ctx.plus(np, nn.buy_num), 0);
          }
          return this.ctx.plus(p, num);
        }, 0);
        obj.buy_num_total = buy_num_total;
        obj.real_pay = _.get(i, 'pay.pay_money');
        const shopData = _.pick(_.head(goods), [ 'shop', 'shop_name' ]);
        obj.shop = { _id: shopData.shop, name: shopData.shop_name };
        if (!_.get(shopData, 'name')) {
          const d = await this.shopModel.findById(shopData.shop, { name: 1 }).lean();
          obj.shop.name = d.name;
        }
        const specs = [];
        for (const shop of goods) {
          const { goods: specGoods, is_set = '1' } = shop;
          if (is_set === '1') {
            for (const sg of specGoods) {
              const spec = _.pick(sg, [ '_id', 'name', 'file', 'act', 'buy_num', 'gift', 'price', 'freight', 'sp_price' ]);
              if (!spec.price) spec.price = _.get(sg, 'sell_money');
              const goods = _.pick(sg.goods, [ '_id', 'name', 'file' ]);
              spec.goods = goods;
              specs.push(spec);
            }
          } else {
            const goods = _.get(shop, 'goods', []);
            const obj = _.omit(shop, [ 'goods', 'meta' ]);
            const newGoods = goods.map(i => {
              const ngo = {
                goods: { name: _.get(i, 'goods.name'), file: _.get(i, 'goods.file') },
                spec: { name: _.get(i, 'spec.name'), file: _.get(i, 'spec.file') },
                set_num: _.get(i, 'set_num'),
              };
              return ngo;
            });
            obj.goods = newGoods;
            specs.push(obj);
          }
        }
        obj.spec = specs;
        const others = _.pick(i, [ '_id', 'status', 'is_afterSale', 'is_rate', 'price', 'total_detail', 'type' ]);
        obj = { ...obj, ...others, is_order: true };
      } else {
        // 是orderDetail表的数据,需要用orderDetail的计算方式
        const real_pay = this.ctx.service.util.orderDetail.computedRealPay(i);
        obj.real_pay = real_pay;
        obj.buy_num_total = goods.reduce((p, n) => this.ctx.plus(p, n.buy_num), 0);
        const others = _.pick(i, [ '_id', 'status', 'is_afterSale', 'is_rate', 'price', 'total_detail', 'type', 'transport', 'transport_type' ]);
        const shop = await this.shopModel.findById(i.shop, { name: 1 }).lean();
        obj.shop = shop;
        const afterSale = await this.afterSaleModel.find({ order_detail: i._id });
        const rate = await this.goodsRateModel.find({ orderDetail: i._id });
        const specs = [];
        for (const sg of goods) {
          const { is_set = '1' } = sg;
          if (is_set === '1') {
            const spec = _.pick(sg, [ '_id', 'name', 'file', 'act', 'buy_num', 'gift', 'price', 'freight', 'sp_price' ]);
            if (!spec.price) spec.price = _.get(sg, 'sell_money');
            const goods = _.pick(sg.goods, [ '_id', 'name', 'file' ]);
            spec.goods = goods;

            const r = afterSale.find(f => ObjectId(_.get(f, 'goods._id')).equals(sg._id));
            if (r) spec.is_afterSale = true;
            else spec.is_afterSale = false;

            const r2 = rate.find(f => ObjectId(_.get(f, 'goodsSpec')).equals(sg._id));
            if (r2) {
              spec.is_rate = true;
              spec.rate = r2._id;
            } else spec.is_rate = false;

            specs.push(spec);
          } else {
            const goods = _.get(sg, 'goods', []);
            const obj = _.omit(sg, [ 'goods', 'meta' ]);
            const newGoods = goods.map(i => {
              const ngo = {
                goods: { name: _.get(i, 'goods.name'), file: _.get(i, 'goods.file') },
                spec: { name: _.get(i, 'spec.name'), file: _.get(i, 'spec.file') },
                set_num: _.get(i, 'set_num'),
              };
              const r = afterSale.find(f => _.get(f, 'goods._id') === _.get(i, 'spec._id'));
              if (r) ngo.is_afterSale = true;
              else ngo.is_afterSale = false;
              const r2 = rate.find(f => _.get(f, 'goodsSpec') === _.get(i, 'spec._id'));
              if (r2) {
                ngo.is_rate = true;
                ngo.rate = r2._id;
              } else ngo.is_rate = false;
              return ngo;
            });
            obj.goods = newGoods;
            specs.push(obj);
          }
        }
        obj.spec = specs;
        obj = { ...obj, ...others, is_order: false };
      }
      newArr.push(obj);
    }
    const total = _.get(_.head(tr), 'total', 0);
    return { data: newArr, total };
  }
}

module.exports = OrderService;