<Miqdad> fix cannot apply voucher when cart has promotion item

1 files changed, 53 insertions, 12 deletions

diff --git a/indoteknik_custom/models/sale_order.py b/indoteknik_custom/models/sale_order.py
index 663cba58..3aaae12d 100755
--- a/indoteknik_custom/models/sale_order.py
+++ b/indoteknik_custom/models/sale_order.py
@@ -2871,6 +2871,7 @@ class SaleOrder(models.Model):
     def action_apply_voucher(self):
         for line in self.order_line:
             if line.order_promotion_id:
+                _logger.warning(f"[CHECKOUT FAILED] Produk promo ditemukan: {line.product_id.display_name}")
                 raise UserError('Voucher tidak dapat digabung dengan promotion program')
 
         voucher = self.voucher_id
@@ -2913,42 +2914,82 @@ class SaleOrder(models.Model):
         self.apply_voucher_shipping()
 
     def apply_voucher(self):
+        def _is_promo_line(line):
+            # TRUE jika baris tidak boleh kena voucher
+            if getattr(line, 'order_promotion_id', False):
+                return True  # baris dari program promo
+            if (line.price_unit or 0.0) == 0.0:
+                return True  # free item
+            if getattr(line, 'is_has_disc', False):
+                return True  # sudah promo/flashsale/berdiskon
+            if (line.discount or 0.0) >= 100.0:
+                return True  # safety
+            return False
+
+        # --- LOOP 1: susun input untuk voucher.apply() ---
         order_line = []
         for line in self.order_line:
+            if _is_promo_line(line):
+                continue
             order_line.append({
                 'product_id': line.product_id,
                 'price': line.price_unit,
                 'discount': line.discount,
                 'qty': line.product_uom_qty,
-                'subtotal': line.price_subtotal
+                'subtotal': line.price_subtotal,
             })
+
+        if not order_line:
+            return
+
         voucher = self.voucher_id.apply(order_line)
 
+        # --- LOOP 2: tulis hasilnya HANYA ke non-promo ---
         for line in self.order_line:
+            if _is_promo_line(line):
+                continue
+
             line.initial_discount = line.discount
 
             voucher_type = voucher['type']
-            used_total = voucher['total'][voucher_type]
-            used_discount = voucher['discount'][voucher_type]
+            total_map = voucher['total'][voucher_type]
+            discount_map = voucher['discount'][voucher_type]
 
-            manufacture_id = line.product_id.x_manufacture.id
             if voucher_type == 'brand':
-                used_total = used_total.get(manufacture_id)
-                used_discount = used_discount.get(manufacture_id)
+                m_id = line.product_id.x_manufacture.id
+                used_total = (total_map or {}).get(m_id)
+                used_discount = (discount_map or {}).get(m_id)
+            else:
+                used_total = total_map
+                used_discount = discount_map
 
-            if not used_total or not used_discount:
+            if not used_total or not used_discount or (line.product_uom_qty or 0.0) == 0.0:
                 continue
 
             line_contribution = line.price_subtotal / used_total
             line_voucher = used_discount * line_contribution
-            line_voucher_item = line_voucher / line.product_uom_qty
+            per_item_voucher = line_voucher / line.product_uom_qty
 
-            line_price_unit = line.price_unit / 1.11 if any(tax.id == 23 for tax in line.tax_id) else line.price_unit
-            line_discount_item = line_price_unit * line.discount / 100 + line_voucher_item
-            line_voucher_item = line_discount_item / line_price_unit * 100
+            has_ppn_11 = any(tax.id == 23 for tax in line.tax_id)
+            base_unit = line.price_unit / 1.11 if has_ppn_11 else line.price_unit
+
+            new_disc_value = base_unit * line.discount / 100 + per_item_voucher
+            new_disc_pct = (new_disc_value / base_unit) * 100
 
             line.amount_voucher_disc = line_voucher
-            line.discount = line_voucher_item
+            line.discount = new_disc_pct
+
+            _logger.info(
+                "[VOUCHER_APPLIED] SO=%s voucher=%s type=%s line_id=%s product=%s qty=%s discount_pct=%.2f amount_voucher=%s",
+                self.name,
+                getattr(self.voucher_id, "code", None),
+                voucher.get("type"),
+                line.id,
+                line.product_id.display_name,
+                line.product_uom_qty,
+                line.discount,
+                line.amount_voucher_disc,
+            )
 
         self.amount_voucher_disc = voucher['discount']['all']
         self.applied_voucher_id = self.voucher_id