<?php

namespace Drupal\app_core\Plugin\views\filter;

use Drupal\views\Plugin\views\filter\FilterPluginBase;

/**
 * Filter for recommended products.
 *
 * @ingroup views_filter_handlers
 *
 * @ViewsFilter("recommended_products")
 */
class RecommendedProductsFilter extends FilterPluginBase {

  public function query() {
    $this->ensureMyTable();
    $product_id = $this->view->args[0];
    $product = \Drupal::entityTypeManager()
      ->getStorage('commerce_product')
      ->load($product_id);
    $term = $product->get('app_group')->referencedEntities()[0];
    // Get all products belonging to the same term (group).
    $products = \Drupal::entityTypeManager()
      ->getStorage('commerce_product')
      ->loadByProperties([
        'app_group' => $term->id(),
      ]);
    $product_ids = [];
    array_walk($products, function($product) use (&$product_ids) {
      $product_ids[] = $product->id();
    });
    $this->query->addWhere(0, 'product_id', $product_ids, 'IN');
//    $product_top_group = $this->findProductsTopGroup($term);
//    $child_terms = \Drupal::entityTypeManager()->getStorage('taxonomy_term')->loadTree('group', $product_top_group->id());
//    $acceptable_terms = [];
//    foreach ($child_terms as $child_term) {
//      $acceptable_terms[] = $child_term->name;
//    }
//    $products = \Drupal::entityTypeManager()->getStorage('commerce_product')->loadMultiple();
    $mile = 'mile';
  }

//  public function findProductsTopGroup($term) {
//    if ($term->hasField('parent') && $term->get('parent')->target_id !== '0') {
//      $term = $term->get('parent')->referencedEntities()[0];
//      return $this->findProductsTopGroup($term);
//    }
//    else {
//      return $term;
//    }
//
//  }

}