<?php

namespace Aikanen\Modules\ProductExport;

defined('ABSPATH') || exit;

use Aikanen\Modules\ProductImport\ProductImportMapper;
use Automattic\WooCommerce\Internal\Features\FeaturesController;

// Map WooCommerce product data to Aikanen product data
class ProductExportMapper
{
   public function toAikanen(\WC_Product $product): array
   {
      $data = [
         'amount' => $this->convertPrice($product->get_regular_price()),
         'barcode' => $product->get_global_unique_id() ?: null,
         'description' => mb_substr($product->get_description(), 0, 500) ?: null, 
         'name' => mb_substr($product->get_name(), 0, 45),
         'short_description' => mb_substr($product->get_short_description(), 0, 100) ?: null,
         'sku' => $product->get_sku() ?: null,
         'type' => 'product',
         'vat_id' => $this->resolveVatId($product),
      ];

      $data['stock'] = $product->managing_stock()
         ? (int) $product->get_stock_quantity() // Stock management enabled
         : null; // No stock management

      $data['discounted'] = $product->get_sale_price() !== ''
         ? $this->convertPrice($product->get_sale_price()) // Convert to cents if not null, '' or 0
         : null; // No sale price set

      if (wc_get_container()->get(FeaturesController::class)->feature_is_enabled('cost_of_goods_sold')) { // If cost of goods is enabled on WooCommerce
         $unitCost = $product->get_meta('_cogs_total_value');
         $data['unit_cost'] = $unitCost !== '' && (float) $unitCost > 0
            ? $this->convertPrice($unitCost) // Convert to cents if not null, '' or 0
            : null; // No unit cost set
      }

      return $data;
   }

   // Get categories of product that are linked to Aikanen service groups
   public function getServiceGroupIds(\WC_Product $product): array
   {
      $termIds = wp_get_object_terms($product->get_id(), 'product_cat', ['fields' => 'ids']);
      $groupIds = [];

      foreach ($termIds as $termId) {
         $groupId = get_term_meta($termId, '_aikanen_group_id', true);
         if ($groupId) {
            $groupIds[] = $groupId;
         }
      }

      return $groupIds;
   }   

   // Convert price - Woo stores prices as strings, Aikanen expects cents
   private function convertPrice(string $price): int
   {
      return (int) round((float) $price * 100);
   }

   private function resolveVatId(\WC_Product $product): int
   {
      $taxClass = $product->get_tax_class();
      $vatMap = (new ProductImportMapper())->getVatMap();
      return (int) (array_search($taxClass, $vatMap, true) ?: 1);
   }
}