update controllers logic

app/Services/Discounts/DiscountInvoiceService.php

@@ -9,11 +9,17 @@ use App\Models\Enrollment;
 use App\Models\EventCharges;
 use App\Models\Invoice;
 use App\Models\Payment;
+use App\Services\ApplicationUrlService;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Schema;
 
 class DiscountInvoiceService
 {
+    public function __construct(
+        private ApplicationUrlService $urls,
+    ) {
+    }
+
     public function getCurrentInvoiceBalance(int $invoiceId, string $schoolYear): float
     {
         $invoice = Invoice::query()->find($invoiceId);
@@ -347,7 +353,7 @@ class DiscountInvoiceService
             'invoice_total' => (float) $invoice->total_amount,
             'pre_balance' => $preBalance,
             'post_balance' => $postBalance,
-            'portalLink' => url('parent/invoices/' . $invoiceId),
+            'portalLink' => $this->urls->spaParentInvoiceDetailUrl($invoiceId),
         ];
 
         return [$data, $studentRows];