feat: add total field to purchases and update related logic for payment processing

app/Domains/Purchase/Models/Purchase.php

@@ -18,6 +18,7 @@ use Illuminate\Database\Eloquent\Relations\HasMany;
     'status',
     'payment_status',
     'payment_method',
+    'total',
     'dni',
     'telefono',
     'nombre_apellido',
@@ -34,6 +35,7 @@ class Purchase extends Model
         return [
             'cart_id' => 'integer',
             'user_id' => 'integer',
+            'total' => 'decimal:2',
         ];
     }
 
@@ -87,13 +89,26 @@ class Purchase extends Model
 
     public function getTotalAmount(): float
     {
+        if ($this->total !== null) {
+            return (float) $this->total;
+        }
+
+        return $this->calculateCurrentTotalAmount();
+    }
+
+    public function calculateCurrentTotalAmount(): float
+    {
+        if ($this->relationLoaded('items') && $this->getRelation('items')->isNotEmpty()) {
+            return (float) $this->getRelation('items')->sum('total');
+        }
+
         if ($this->items()->exists()) {
             return (float) $this->items()->sum('total');
         }
 
         $cart = $this->relationLoaded('cart')
             ? $this->getRelation('cart')
-            : $this->cart()->first();
+            : $this->cart()->with('items.variant.product')->first();
 
         if (! $cart) {
             return 0.0;
@@ -105,8 +120,8 @@ class Purchase extends Model
     public function finalize(): void
     {
         $this->update([
-            'status' => 'pagado', // Or the equivalent final status in your system
-            'payment_status' => 'paid',
+            'status' => 'paid',
+            'payment_status' => 'approved',
         ]);
     }
 }