fix amount 5

app/Http/Controllers/Controller.php

@@ -280,12 +280,64 @@ class Controller extends BaseController
         return self::productSellTitle(self::metalTypeLabel());
     }
 
-    /** واحد وزن معاملات فلز اصلی — مس: کیلوگرم، طلا: گرم */
+    /** واحد وزن معاملات فلز — از ستینگ unit؛ پیش‌فرض گرم */
     public static function tradeWeightUnit(): string
     {
-        $label = self::metalTypeLabel();
+        return self::resolveTradeWeightUnit(
+            Setting::where('key', 'unit')->value('value')
+        );
+    }
 
-        return str_contains($label, 'مس') ? 'کیلوگرم' : 'گرم';
+    public static function resolveTradeWeightUnit(?string $value): string
+    {
+        $unit = trim((string) $value);
+
+        if ($unit === 'کیلوگرم' || $unit === 'kilogram' || $unit === 'kg') {
+            return 'کیلوگرم';
+        }
+
+        return 'گرم';
+    }
+
+    public static function weightToGrams(float $value, ?string $fromUnit = null): float
+    {
+        $from = $fromUnit ?? self::tradeWeightUnit();
+
+        return $from === 'کیلوگرم' ? $value * 1000 : $value;
+    }
+
+    public static function gramsToTradeUnit(float $grams): float
+    {
+        return self::tradeWeightUnit() === 'کیلوگرم' ? $grams / 1000 : $grams;
+    }
+
+    public static function productStorageWeightUnit($product): string
+    {
+        $unit = trim((string) (is_object($product) ? ($product->unit ?? '') : ($product['unit'] ?? '')));
+
+        if (self::isWeightBasedProductUnit($unit)) {
+            return $unit;
+        }
+
+        return 'گرم';
+    }
+
+    public static function productLineWeightToGrams($product, $quantity): float
+    {
+        $groupType = is_object($product) ? ($product->group_type ?? '') : ($product['group_type'] ?? '');
+        if ((string) $groupType === 'سکه') {
+            return 0.0;
+        }
+
+        $qty = (float) $quantity;
+        $unit = trim((string) (is_object($product) ? ($product->unit ?? '') : ($product['unit'] ?? '')));
+        $amount = (float) (is_object($product) ? ($product->amount ?? 0) : ($product['amount'] ?? 0));
+
+        if (self::isWeightBasedProductUnit($unit)) {
+            return self::weightToGrams($qty, $unit);
+        }
+
+        return self::weightToGrams($amount * $qty, self::productStorageWeightUnit($product));
     }
 
     public static function isWeightBasedProductUnit(?string $unit): bool
@@ -330,7 +382,7 @@ class Controller extends BaseController
         }
 
         $group = trim((string) ($product['group_type'] ?? ''));
-        if (in_array($group, ['مفتول مس', 'کاتد مس'], true)) {
+        if (in_array($group, ['مفتول مس'], true)) {
             return true;
         }