$largestGroupCount = $thisGroupTotal;
							$largestGroupKey   = $key;
						}
					}
				}


				$last = count( $this->groups[ $largestGroupKey ]['results'] ) - 1;
				if ( isset( $this->groups[ $largestGroupKey ]['results'][ $last ] ) ) {
					unset( $this->groups[ $largestGroupKey ]['results'][ $last ] );
				}

			}
		}

	}

	/**
	 * Prepare suggestions based on groups
	 *
	 * @return array
	 */
	public function convertGroupsToSuggestions() {
		$suggestions = array();

		$totalHeadlines = 0;

		foreach ( $this->groups as $key => $group ) {

			if ( ! empty( $group['results'] ) ) {

				if ( $this->showHeadings ) {
					$suggestions[] = $this->headlineBody( $key );
					$totalHeadlines ++;
				}

				foreach ( $group['results'] as $result ) {
					$suggestions[] = $result;
				}
			}
		}

		// Remove products headline when there are only product type suggestion
		if ( $totalHeadlines === 1 ) {
			$i     = 0;
			$unset = false;
			foreach ( $suggestions as $key => $suggestion ) {
				if (
					! empty( $suggestion['type'] )
					&& $suggestion['type'] === 'headline'
					&& $suggestion['value'] === 'product'
				) {
					unset( $suggestions[ $i ] );
					$unset = true;
					break;
				}

				$i ++;
			}

			if ( $unset ) {
				$suggestions = array_values( $suggestions );
			}
		}

		return $suggestions;
	}

	/**
	 * Order of the search resutls groups
	 *
	 * @return array
	 */
	public function searchResultsGroups() {
		$groups = array();

		if ( DGWT_WCAS()->settings->getOption( 'show_product_tax_product_cat' ) === 'on' ) {
			$groups['tax_product_cat'] = array(
				'limit' => 3
			);
		}

		if ( DGWT_WCAS()->settings->getOption( 'show_product_tax_product_tag' ) === 'on' ) {
			$groups['tax_product_tag'] = array(
				'limit' => 3
			);
		}

		$groups['product'] = array(
			'limit' => 7
		);

		return apply_filters( 'dgwt/wcas/search_groups', $groups );
	}

	/**
	 * Allow to get the ID of products that have been found
	 *
	 * @param integer[] $postsIDs
	 *
	 * @return mixed
	 */
	public function getProductIds( $postsIDs ) {
		if ( $this->postsIDsBuffer !== null ) {
			return $this->postsIDsBuffer;
		}

		return $postsIDs;
	}

	/**
	 * Add taxonomies labels
	 *
	 * @param array $labels Labels used at frontend
	 *
	 * @return array
	 */
	public function setTaxonomiesLabels( $labels ) {
		$labels['tax_product_cat_plu'] = __( 'Categories', 'woocommerce' );
		$labels['tax_product_cat']     = __( 'Category', 'woocommerce' );
		$labels['tax_product_tag_plu'] = __( 'Tags' );
		$labels['tax_product_tag']     = __( 'Tag' );

		return $labels;
	}

	/**
	 * Backward compatibility for labels
	 *
	 * Full taxonomy names for categories and tags. All with prefix 'tax_'.
	 *
	 * @param array $labels Labels used at frontend
	 *
	 * @return array
	 */
	public function fixTaxonomiesLabels( $labels ) {
		// Product category. Old: 'category', 'product_cat_plu'.
		if ( isset( $labels['category'] ) ) {
			$labels['tax_product_cat'] = $labels['category'];
			unset( $labels['category'] );
		}
		if ( isset( $labels['product_cat_plu'] ) ) {
			$labels['tax_product_cat_plu'] = $labels['product_cat_plu'];
			unset( $labels['product_cat_plu'] );
		}

		// Product tag. Old: 'tag', 'product_tag_plu'.
		if ( isset( $labels['tag'] ) ) {
			$labels['tax_product_tag'] = $labels['tag'];
			unset( $labels['tag'] );
		}
		if ( isset( $labels['product_tag_plu'] ) ) {
			$labels['tax_product_tag_plu'] = $labels['product_tag_plu'];
			unset( $labels['product_tag_plu'] );
		}

		return $labels;
	}

	/**
	 * Add language to WC endpoint if Polylang is active
	 *
	 * @param $url
	 * @param $request
	 *
	 * @return string
	 * @see polylang-wc/frontend/frontend.php:306
	 */
	public function fixPolylangWooEndpoint( $url, $request ) {
		if ( PLL() instanceof \PLL_Frontend ) {
			// Remove wc-ajax to avoid the value %%endpoint%% to be encoded by add_query_arg (used in plain permalinks).
			$url = remove_query_arg( 'wc-ajax', $url );
			$url = PLL()->links_model->switch_language_in_link( $url, PLL()->curlang );

			return add_query_arg( 'wc-ajax', $request, $url );
		}

		return $url;
	}

	/**
	 * Get empty search output
	 *
	 * @return array
	 */
	private function getEmptyOutput() {
		$output = array(
			'engine'      => 'free',
			'suggestions' => array(),
			'time'        => '0 sec',
			'total'       => 0,
			'v'           => DGWT_WCAS_VERSION,
		);

		return $output;
	}
}