From 5b34972ee3be981ac6c73e26b14b73a886efaa17 Mon Sep 17 00:00:00 2001
From: Zuncle <34310384@qq.com>
Date: Fri, 20 Mar 2026 21:18:02 +0800
Subject: [PATCH] =?UTF-8?q?fix(dashboard):=20=E7=9B=88=E4=BA=8F=E5=88=86?=
 =?UTF-8?q?=E6=9E=90CAST=E4=BF=AE=E5=A4=8D+=E8=A7=86=E8=A7=92=E6=94=B9?=
 =?UTF-8?q?=E4=B8=BA=E5=B9=B3=E5=8F=B0=E8=A7=86=E8=A7=92(A-B)?=
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1. CAST修复：
   MySQL的 / 运算符返回DECIMAL类型，GORM无法将DECIMAL扫描进int64，
   导致商品产出静默返回0。添加 CAST(... AS SIGNED) 与排行榜对齐。

2. 视角统一：
   盈亏分析原为用户视角(B-A)，排行榜为平台视角(A-B)，同一用户
   一个显示+¥12,130(用户赚了)，一个显示-¥12,127(平台亏了)，
   造成管理员困惑。

   修改：
   - 净盈亏: Value-Cost → Cost-Value (A-B，平台盈利为正)
   - 盈亏比: Value/Cost → Cost/Value (A/B，>1表示平台盈利)
   - 趋势图每个数据点同步调整
---
 internal/api/admin/users_profile.go     |  4 ++--
 internal/api/admin/users_profit_loss.go | 20 ++++++++++----------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/internal/api/admin/users_profile.go b/internal/api/admin/users_profile.go
index 20faf47..cecc471 100755
--- a/internal/api/admin/users_profile.go
+++ b/internal/api/admin/users_profile.go
@@ -197,10 +197,10 @@ func (h *handler) GetUserProfile() core.HandlerFunc {
 		_ = h.repo.GetDbR().Raw(`
 			SELECT
 				COUNT(ui.id) as count,
-				COALESCE(SUM(
+				CAST(COALESCE(SUM(
 					COALESCE(NULLIF(ui.value_cents, 0), ars.price_snapshot_cents, p.price, 0)
 					* GREATEST(COALESCE(sic.reward_multiplier_x1000, 1000), 1000) / 1000
-				), 0) as value
+				), 0) AS SIGNED) as value
 			FROM user_inventory ui
 			LEFT JOIN products p ON p.id = ui.product_id
 			LEFT JOIN activity_reward_settings ars ON ars.id = ui.reward_id
diff --git a/internal/api/admin/users_profit_loss.go b/internal/api/admin/users_profit_loss.go
index 48ba554..fafda9c 100755
--- a/internal/api/admin/users_profit_loss.go
+++ b/internal/api/admin/users_profit_loss.go
@@ -88,10 +88,10 @@ func (h *handler) GetUserProfitLossTrend() core.HandlerFunc {
 		}
 		_ = h.repo.GetDbR().Raw("SELECT COALESCE(SUM(points), 0) FROM user_points WHERE user_id = ? AND (valid_end IS NULL OR valid_end > NOW())", userID).Scan(&curAssets.Points).Error
 		_ = h.repo.GetDbR().Raw(`
-			SELECT COALESCE(SUM(
+			SELECT CAST(COALESCE(SUM(
 				COALESCE(NULLIF(ui.value_cents, 0), ars.price_snapshot_cents, p.price, 0)
 				* GREATEST(COALESCE(sic.reward_multiplier_x1000, 1000), 1000) / 1000
-			), 0)
+			), 0) AS SIGNED)
 			FROM user_inventory ui
 			LEFT JOIN products p ON p.id = ui.product_id
 			LEFT JOIN activity_reward_settings ars ON ars.id = ui.reward_id
@@ -216,10 +216,10 @@ func (h *handler) GetUserProfitLossTrend() core.HandlerFunc {
 			p.Breakdown.Cards = curAssets.Cards
 			p.Breakdown.Coupons = curAssets.Coupons
 
-			p.Profit = p.Value - p.Cost
-			if p.Cost > 0 {
-				p.Ratio = float64(p.Value) / float64(p.Cost)
-			} else if p.Value > 0 {
+			p.Profit = p.Cost - p.Value
+			if p.Value > 0 {
+				p.Ratio = float64(p.Cost) / float64(p.Value)
+			} else if p.Cost > 0 {
 				p.Ratio = 99.9
 			}
 		}
@@ -262,10 +262,10 @@ func (h *handler) GetUserProfitLossTrend() core.HandlerFunc {
 		}
 		resp.Summary.TotalCost = finalNetCost
 		resp.Summary.TotalValue = totalAssetValue
-		resp.Summary.TotalProfit = totalAssetValue - finalNetCost
-		if finalNetCost > 0 {
-			resp.Summary.AvgRatio = float64(totalAssetValue) / float64(finalNetCost)
-		} else if totalAssetValue > 0 {
+		resp.Summary.TotalProfit = finalNetCost - totalAssetValue
+		if totalAssetValue > 0 {
+			resp.Summary.AvgRatio = float64(finalNetCost) / float64(totalAssetValue)
+		} else if finalNetCost > 0 {
 			resp.Summary.AvgRatio = 99.9
 		}