feat: add filtering for product detail attribute options based on available variant values

app/Domains/Catalog/Services/ProductService.php

@@ -293,6 +293,8 @@ class ProductService
             'variants.definitions.productAttribute.attribute.options',
         ]);
 
+        $this->filterProductDetailAttributeOptions($product);
+
         $selectedVariant = $variantId !== null
             ? $product->variants->firstWhere('id', $variantId)
             : $product->variants->first(fn (ProductVariant $variant) => $variant->stock > 0);
@@ -313,4 +315,36 @@ class ProductService
 
         return $product;
     }
+
+    protected function filterProductDetailAttributeOptions(Product $product): void
+    {
+        $availableValuesByAttributeId = [];
+
+        foreach ($product->variants as $variant) {
+            foreach ($variant->definitions as $definition) {
+                $attributeId = $definition->productAttribute?->attribute_id;
+
+                if ($attributeId === null || $definition->value === null) {
+                    continue;
+                }
+
+                $availableValuesByAttributeId[$attributeId][$definition->value] = true;
+            }
+        }
+
+        foreach ($product->attributes as $attribute) {
+            if (! $attribute->relationLoaded('options')) {
+                continue;
+            }
+
+            $availableValues = $availableValuesByAttributeId[$attribute->id] ?? [];
+
+            $attribute->setRelation(
+                'options',
+                $attribute->options
+                    ->filter(fn ($option): bool => array_key_exists($option->value, $availableValues))
+                    ->values()
+            );
+        }
+    }
 }

tests/Feature/Catalog/ProductControllerTest.php

@@ -405,6 +405,10 @@ class ProductControllerTest extends TestCase
             'precio' => 100.00,
         ]);
         $productAttributes = $this->syncVariantAttributes($product);
+        $this->colorAttr->options()->create([
+            'value' => 'Verde',
+            'label' => 'Verde',
+        ]);
 
         $variant = $product->createVariant([
             'stock' => 0,
@@ -479,6 +483,23 @@ class ProductControllerTest extends TestCase
         $response->assertJsonPath('data.variant.definitions.color', 'Rojo');
         $response->assertJsonCount(1, 'data.variant.images');
         $this->assertStringContainsString($variantAttachment->path, $response->json('data.variant.images.0'));
+
+        $colorAttribute = collect($response->json('data.attributes'))->firstWhere('codigo', 'color');
+        $this->assertNotNull($colorAttribute);
+        $this->assertEqualsCanonicalizing(
+            ['Azul', 'Rojo'],
+            collect($colorAttribute['options'])->pluck('value')->all()
+        );
+
+        $attributesResponse = $this->getJson("/api/tenants/{$this->tenant->codigo}/attributes");
+        $attributesResponse->assertOk();
+
+        $masterColorAttribute = collect($attributesResponse->json('data'))->firstWhere('codigo', 'color');
+        $this->assertNotNull($masterColorAttribute);
+        $this->assertEqualsCanonicalizing(
+            ['Azul', 'Rojo', 'Verde'],
+            collect($masterColorAttribute['options'])->pluck('value')->all()
+        );
     }
 
     public function test_it_returns_requested_variant_in_product_detail(): void