From 80f6238d8333aaf38a20c52f2251eb28eedd14f2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=8B=8F=E5=B0=B9=E5=B2=9A?= <770236076@qq.com>
Date: Tue, 11 Aug 2020 17:36:18 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BA=AC=E8=A5=BF=E6=8A=98=E6=89=A3?=
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---
 business/jxstore/act/act.go     | 68 ++++++++++++++++++++++++++++-----
 business/model/act.go           |  4 ++
 business/model/dao/dao_order.go | 22 +++++++++++
 3 files changed, 85 insertions(+), 9 deletions(-)

diff --git a/business/jxstore/act/act.go b/business/jxstore/act/act.go
index 3dd9b95fe..6fbe1e4d1 100644
--- a/business/jxstore/act/act.go
+++ b/business/jxstore/act/act.go
@@ -1523,21 +1523,71 @@ func ChangeJxPriceByDiscountAct(ctx *jxcontext.Context) {
 		if len(actStoreSkus) == 0 {
 			continue
 		}
-		var (
-			storeIDs, skuIDs []int
-		)
 		for _, actStoreSku := range actStoreSkus {
-			storeIDs = append(storeIDs, actStoreSku.StoreID)
-			skuIDs = append(skuIDs, actStoreSku.SkuID)
-		}
-		storeSkus, _ := dao.GetStoresSkusInfo(db, storeIDs, skuIDs)
-		for _, _ = range storeSkus {
+			storeSkus, _ := dao.GetStoresSkusInfo(db, []int{actStoreSku.StoreID}, []int{actStoreSku.SkuID})
+			if len(storeSkus) == 0 {
+				continue
+			}
+			var (
+				storeSku              = storeSkus[0]
+				shouldStockOut        = utils.Float64TwoInt64(math.Ceil(float64(storeSku.Stock) / float64(60))) //每个时间点应出货 = 总库存/60 = N
+				actualStockOut        int64                                                                     //每个时间点实际出货 = C
+				pricePercentage       = 0.02                                                                    //每次涨跌值为 原价的 2%，即原价100，每个时间点降价为2，涨价也为2
+				actualPricePercentage float64
+				minJxPrice            int64
+			)
+			if storeSku.Stock == 0 {
+				continue
+			}
+			actualStockOut, err = dao.GetOrderStoreSkusCount(db, actStoreSku.StoreID, actStoreSku.SkuID, time.Now().Add(-time.Minute*10), time.Now())
+			dao.Begin(db)
+			defer func() {
+				if r := recover(); r != nil || err != nil {
+					dao.Rollback(db)
+					if r != nil {
+						panic(r)
+					}
+				}
+			}()
 			//第一档时间内
 			if (time.Now().Hour() >= 10 && time.Now().Hour() < 20) || (time.Now().Hour() == 20 && time.Now().Minute() < 1) {
-
+				if actStoreSku.TrendType == model.TrendTypeUp {
+					actualPricePercentage = float64(actStoreSku.OriginalPrice) * (float64(1) + pricePercentage)
+				} else if actStoreSku.TrendType == model.TrendTypeDown {
+					actualPricePercentage = float64(actStoreSku.OriginalPrice) * (float64(1) - pricePercentage)
+				} else {
+					actualPricePercentage = 1
+				}
+				if utils.Float64TwoInt64(float64(storeSku.JxPrice)*actualPricePercentage) >= actStoreSku.OriginalPrice {
+					storeSku.JxPrice = int(actStoreSku.OriginalPrice)
+				}
+				//判断活动的折扣类型是最低价还是最低折扣
+				if act.DiscountType == model.ActDiscountTypePrice {
+					minJxPrice = int64(act.DiscountValue1)
+				} else if act.DiscountType == model.ActDiscountTypePercentage {
+					minJxPrice = actStoreSku.OriginalPrice * int64(act.DiscountValue1) / 100
+				}
+				if utils.Float64TwoInt64(float64(storeSku.JxPrice)*actualPricePercentage) <= minJxPrice {
+					storeSku.JxPrice = int(minJxPrice)
+				}
+				if _, err = dao.UpdateEntity(db, storeSku, "JxPrice"); err != nil {
+					dao.Rollback(db)
+				}
+				//C >= 2N  涨价趋势，最高涨价到无折扣
+				if actualStockOut >= 2*shouldStockOut {
+					actStoreSku.TrendType = model.TrendTypeUp
+				} else if actualStockOut < shouldStockOut/2 { //C <= N/2 降价趋势，最低降价到设置到最低折扣
+					actStoreSku.TrendType = model.TrendTypeDown
+				} else {
+					actStoreSku.TrendType = model.TrendTypeNothing
+				}
+				if _, err = dao.UpdateEntity(db, actStoreSku, "TrendType"); err != nil {
+					dao.Rollback(db)
+				}
 			} else { //第二档时间内
 
 			}
+			dao.Commit(db)
 		}
 	}
 }
diff --git a/business/model/act.go b/business/model/act.go
index f9bd995f6..4dab4391d 100644
--- a/business/model/act.go
+++ b/business/model/act.go
@@ -16,6 +16,10 @@ const (
 	ActDiscountTypePrice      = 1 //折扣类型是最低价
 	ActDiscountTypePercentage = 2 //折扣类型是最低折扣
 
+	TrendTypeUp      = 1 //涨价趋势
+	TrendTypeDown    = 2 //降价趋势
+	TrendTypeNothing = 0 //不变
+
 	ActOrderBegin               = 10
 	ActOrderMoneyOff            = 11
 	ActOrderMoneyOffCoupon      = 12
diff --git a/business/model/dao/dao_order.go b/business/model/dao/dao_order.go
index b85b302af..2b2bfd203 100644
--- a/business/model/dao/dao_order.go
+++ b/business/model/dao/dao_order.go
@@ -1345,3 +1345,25 @@ func GetAfsOrdersByPage(db *DaoDB, vendorOrderID, afsOrderID, userID string, fro
 	}
 	return afsOrderList, totalCount, err
 }
+
+func GetOrderStoreSkusCount(db *DaoDB, storeID, skuID int, fromTime, toTime time.Time) (count int64, err error) {
+	tmpOrderSku := &model.OrderSku{}
+	sql := `
+				SELECT SUM(a.count) count
+				  FROM order_sku a
+			      JOIN goods_order b ON a.vendor_order_id = b.vendor_order_id AND a.vendor_id = b.vendor_id
+				 WHERE IF(b.store_id = 0, b.jx_store_id, b.store_id) = ?
+				   AND a.sku_id = ? 
+				   AND b.order_created_at BETWEEN ? AND ?
+			`
+	sqlParams := []interface{}{
+		storeID,
+		skuID,
+		fromTime,
+		toTime,
+	}
+	if err = GetRow(db, &tmpOrderSku, sql, sqlParams); err == nil {
+		return int64(tmpOrderSku.Count), nil
+	}
+	return count, err
+}