<?php namespace App\Services;

use App\Models\CatalogItem;
use App\Models\Price;
use Illuminate\Support\Facades\DB;

class ProductService
{
    public function createProduct(array $data)
    {
        return DB::transaction(function () use ($data) {
            $catalogItem = CatalogItem::create([
                'name' => $data['name'],
                'sku' => $data['sku'],
                'barcode' => $data['barcode'] ?? null,
                'category_id' => $data['category_id'],
                'stock' => $data['stock'] ?? 0,
            ]);

            $price = Price::create([
                'catalog_item_id' => $catalogItem->id,
                'cost' => $data['cost'],
                'retail_price' => $data['retail_price'],
                'tax' => $data['tax'] ?? 16.00,
            ]);

            return $catalogItem->load(['category', 'price']);
        });
    }

    public function updateProduct(CatalogItem $catalogItem, array $data)
    {
        return DB::transaction(function () use ($catalogItem, $data) {
            // Actualizar campos de CatalogItem solo si están presentes
            $catalogItemData = array_filter([
                'name' => $data['name'] ?? null,
                'sku' => $data['sku'] ?? null,
                'barcode' => $data['barcode'] ?? null,
                'category_id' => $data['category_id'] ?? null,
                'stock' => $data['stock'] ?? null,
            ], fn($value) => $value !== null);

            if (!empty($catalogItemData)) {
                $catalogItem->update($catalogItemData);
            }

            // Actualizar campos de Price solo si están presentes
            $priceData = array_filter([
                'cost' => $data['cost'] ?? null,
                'retail_price' => $data['retail_price'] ?? null,
                'tax' => $data['tax'] ?? null,
            ], fn($value) => $value !== null);

            if (!empty($priceData)) {
                $catalogItem->price()->updateOrCreate(
                    ['catalog_item_id' => $catalogItem->id],
                    $priceData
                );
            }

            return $catalogItem->fresh(['category', 'price']);
        });
    }
}