<?php namespace App\Services;

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

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

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

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

    public function updateProduct(Inventory $inventory, array $data)
    {
        return DB::transaction(function () use ($inventory, $data) {
            // Actualizar campos de Inventory solo si están presentes
            $inventoryData = 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($inventoryData)) {
                $inventory->update($inventoryData);
            }

            // 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)) {
                $inventory->price()->updateOrCreate(
                    ['inventory_id' => $inventory->id],
                    $priceData
                );
            }

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