From fc06b3e4dbc467af50b13f005edac8c7cc460713 Mon Sep 17 00:00:00 2001
From: ragilap <ragil9478@gmail.com>
Date: Tue, 20 Jan 2026 14:19:02 +0700
Subject: [PATCH] [FIX/BE-US] purchase edit qty approval staf

---
 .../purchases/services/purchase.service.go    | 39 ++++++++++++++-----
 1 file changed, 29 insertions(+), 10 deletions(-)

diff --git a/internal/modules/purchases/services/purchase.service.go b/internal/modules/purchases/services/purchase.service.go
index f6337c8a..b0914853 100644
--- a/internal/modules/purchases/services/purchase.service.go
+++ b/internal/modules/purchases/services/purchase.service.go
@@ -751,6 +751,9 @@ func (s *purchaseService) ReceiveProducts(c *fiber.Ctx, id uint, req *validation
 		if receivedQty > item.SubQty {
 			return nil, utils.BadRequest(fmt.Sprintf("Received quantity for item %d cannot exceed ordered quantity (%.3f)", payload.PurchaseItemID, item.SubQty))
 		}
+		if receivedQty < item.TotalUsed {
+			return nil, utils.BadRequest(fmt.Sprintf("Received quantity for item %d cannot be lower than used amount (%.3f)", payload.PurchaseItemID, item.TotalUsed))
+		}
 
 		if _, dup := visitedItems[payload.PurchaseItemID]; dup {
 			return nil, utils.BadRequest(fmt.Sprintf("Duplicate receiving data for item %d", payload.PurchaseItemID))
@@ -835,6 +838,7 @@ func (s *purchaseService) ReceiveProducts(c *fiber.Ctx, id uint, req *validation
 		affected := make(map[uint]struct{})
 		updates := make([]rPurchase.PurchaseReceivingUpdate, 0, len(prepared))
 		priceUpdates := make([]rPurchase.PurchasePricingUpdate, 0, len(prepared))
+		totalQtyDeltas := make(map[uint]float64)
 		fifoAdds := make([]struct {
 			itemID uint
 			pwID   uint
@@ -862,14 +866,20 @@ func (s *purchaseService) ReceiveProducts(c *fiber.Ctx, id uint, req *validation
 			deltaQty := prep.receivedQty - item.TotalQty
 			switch {
 			case deltaQty > 0 && newPWID != nil:
-				fifoAdds = append(fifoAdds, struct {
-					itemID uint
-					pwID   uint
-					qty    float64
-				}{itemID: item.Id, pwID: *newPWID, qty: deltaQty})
+				if s.FifoSvc != nil {
+					fifoAdds = append(fifoAdds, struct {
+						itemID uint
+						pwID   uint
+						qty    float64
+					}{itemID: item.Id, pwID: *newPWID, qty: deltaQty})
+				} else {
+					deltas[*newPWID] += deltaQty
+					totalQtyDeltas[item.Id] += deltaQty
+				}
 			case deltaQty < 0 && newPWID != nil:
 				deltas[*newPWID] += deltaQty // negative
 				affected[*newPWID] = struct{}{}
+				totalQtyDeltas[item.Id] += deltaQty
 			}
 
 			dateCopy := prep.receivedDate
@@ -892,7 +902,7 @@ func (s *purchaseService) ReceiveProducts(c *fiber.Ctx, id uint, req *validation
 
 			updates = append(updates, update)
 
-			if item.Price > 0 && prep.receivedQty >= 0 {
+			if prep.receivedQty >= 0 {
 				priceUpdates = append(priceUpdates, rPurchase.PurchasePricingUpdate{
 					ItemID:     item.Id,
 					Price:      item.Price,
@@ -919,6 +929,19 @@ func (s *purchaseService) ReceiveProducts(c *fiber.Ctx, id uint, req *validation
 			}
 		}
 
+		if len(totalQtyDeltas) > 0 {
+			for itemID, delta := range totalQtyDeltas {
+				if delta == 0 {
+					continue
+				}
+				if err := tx.Model(&entity.PurchaseItem{}).
+					Where("purchase_id = ? AND id = ?", purchase.Id, itemID).
+					Update("total_qty", gorm.Expr("COALESCE(total_qty,0) + ?", delta)).Error; err != nil {
+					return err
+				}
+			}
+		}
+
 		// Update due_date based on earliest received date when receiving approved.
 		if earliestReceived != nil {
 			due := earliestReceived.AddDate(0, 0, purchase.CreditTerm)
@@ -1371,10 +1394,6 @@ func (s *purchaseService) buildStaffAdjustmentPayload(
 			qtyCopy := effectiveQty
 			update.Quantity = &qtyCopy
 		}
-		if syncReceiving {
-			qtyCopy := effectiveQty
-			update.TotalQty = &qtyCopy
-		}
 
 		updates = append(updates, update)
 		delete(requestItems, item.Id)