feat: Enhance Bundle Configuration and Pricing Logic

- Updated BundleConfigurationRequest to allow configurations with only solar panel size.
- Refactored BundleConfiguration model to dynamically calculate total price and weight based on selected options.
- Added BundleBuilder component to the frontend for user-friendly bundle configuration.
- Integrated new bundle configuration API endpoints and improved error handling in tests.
- Created comprehensive tests for Bundle API and Shipping API to ensure functionality and validation.

Author: LXMachado

backend/app/Http/Requests/BundleConfigurationRequest.php

@@ -119,9 +119,8 @@ public function withValidator($validator): void
 
             // Solar panel size is always required, but we already validate that
 
-            if (!$hasOptions) {
-                $validator->errors()->add('configuration', 'Please select at least one optional component or ensure solar panel size is specified.');
-            }
+            // Allow configurations with just solar panel size (basic kit)
+            // The solar panel size is already validated as required above
         });
     }
 }

backend/app/Models/BundleConfiguration.php

@@ -97,44 +97,47 @@ public function generateShareToken(): void
      */
     public function calculateTotals(): void
     {
-        $totalPrice = $this->bundle->price; // Base price
+        $totalPrice = $this->bundle->price ?? 0; // Base price
         $totalWeight = $this->bundle->base_weight_g ?? 0; // Base weight
 
         if ($this->configuration_data) {
+            $availableOptions = $this->bundle->getAvailableOptions();
+
             // Add espresso module price/weight if selected
             if (isset($this->configuration_data['espresso_module']) && $this->configuration_data['espresso_module']) {
-                $totalPrice += 150.00; // Example price - should come from actual product
-                $totalWeight += 800; // Example weight in grams
+                $espressoModule = $availableOptions['espresso_module'] ?? null;
+                if ($espressoModule) {
+                    $totalPrice += $espressoModule['price'];
+                    $totalWeight += $espressoModule['weight_g'];
+                }
             }
 
             // Add filter attachment price/weight if selected
             if (isset($this->configuration_data['filter_attachment']) && $this->configuration_data['filter_attachment']) {
-                $totalPrice += 75.00;
-                $totalWeight += 300;
+                $filterAttachment = $availableOptions['filter_attachment'] ?? null;
+                if ($filterAttachment) {
+                    $totalPrice += $filterAttachment['price'];
+                    $totalWeight += $filterAttachment['weight_g'];
+                }
             }
 
             // Add fan accessory price/weight if selected
             if (isset($this->configuration_data['fan_accessory']) && $this->configuration_data['fan_accessory']) {
-                $totalPrice += 45.00;
-                $totalWeight += 200;
+                $fanAccessory = $availableOptions['fan_accessory'] ?? null;
+                if ($fanAccessory) {
+                    $totalPrice += $fanAccessory['price'];
+                    $totalWeight += $fanAccessory['weight_g'];
+                }
             }
 
             // Add solar panel price/weight based on size
             $solarPanelSize = $this->configuration_data['solar_panel_size'] ?? '10W';
-            switch ($solarPanelSize) {
-                case '15W':
-                    $totalPrice += 50.00;
-                    $totalWeight += 400;
-                    break;
-                case '20W':
-                    $totalPrice += 100.00;
-                    $totalWeight += 600;
-                    break;
-                case '10W':
-                default:
-                    $totalPrice += 25.00;
-                    $totalWeight += 250;
-                    break;
+            $solarPanelSizes = $availableOptions['solar_panel_sizes'] ?? [];
+            $selectedPanel = $solarPanelSizes[$solarPanelSize] ?? null;
+
+            if ($selectedPanel) {
+                $totalPrice += $selectedPanel['price'];
+                $totalWeight += $selectedPanel['weight_g'];
             }
         }