From 0457ef6c7c8b0dc05fd3afbf40b67c443d70441a Mon Sep 17 00:00:00 2001
From: masoodafar-web <masoud.afarin.moghaddam@outlook.com>
Date: Mon, 23 Feb 2026 23:06:37 +0330
Subject: [PATCH] fix: validate discount wallet balance before applying
 discount in PlaceOrderCommandHandler

---
 .../Commands/PlaceOrder/PlaceOrderCommandHandler.cs | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/CMSMicroservice.Application/DiscountShopCQ/Commands/PlaceOrder/PlaceOrderCommandHandler.cs b/src/CMSMicroservice.Application/DiscountShopCQ/Commands/PlaceOrder/PlaceOrderCommandHandler.cs
index 9a3d9a4..898aaba 100644
--- a/src/CMSMicroservice.Application/DiscountShopCQ/Commands/PlaceOrder/PlaceOrderCommandHandler.cs
+++ b/src/CMSMicroservice.Application/DiscountShopCQ/Commands/PlaceOrder/PlaceOrderCommandHandler.cs
@@ -111,7 +111,18 @@ public class PlaceOrderCommandHandler : IRequestHandler<PlaceOrderCommand, Place
 
         // Always apply maximum possible discount (100%) — user cannot choose less
         var maxDiscountBalanceUsable = totalDiscountAmount;
-        var actualDiscountBalanceUsed = Math.Min(maxDiscountBalanceUsable, userWallet.DiscountBalance);
+
+        // بررسی کافی بودن موجودی کیف پول اعتباری (تخفیفی)
+        if (userWallet.DiscountBalance < maxDiscountBalanceUsable)
+        {
+            return new PlaceOrderResponseDto
+            {
+                Success = false,
+                Message = $"موجودی کیف پول اعتباری کافی نیست. مبلغ مورد نیاز: {maxDiscountBalanceUsable:N0} ریال، موجودی شما: {userWallet.DiscountBalance:N0} ریال"
+            };
+        }
+
+        var actualDiscountBalanceUsed = maxDiscountBalanceUsable;
 
         _logger.LogInformation(
             "Discount auto-applied: max allowed={MaxAllowed}, wallet balance={WalletBalance}, used={Used}",