public function get_tax_query( $tax_query = array(), $main_query = false ) {
		if ( ! is_array( $tax_query ) ) {
			$tax_query = array(
				'relation' => 'AND',
			);
		}

		// Layered nav filters on terms.
		if ( $main_query ) {
			foreach ( $this->get_layered_nav_chosen_attributes() as $taxonomy => $data ) {
				$tax_query[] = array(
					'taxonomy'         => $taxonomy,
					'field'            => 'slug',
					'terms'            => $data['terms'],
					'operator'         => 'and' === $data['query_type'] ? 'AND' : 'IN',
					'include_children' => false,
				);
			}
		}

		$product_visibility_terms  = wc_get_product_visibility_term_ids();
		$product_visibility_not_in = array( is_search() && $main_query ? $product_visibility_terms['exclude-from-search'] : $product_visibility_terms['exclude-from-catalog'] );

		// Hide out of stock products.
		if ( 'yes' === get_option( 'woocommerce_hide_out_of_stock_items' ) ) {
			$product_visibility_not_in[] = $product_visibility_terms['outofstock'];
		}

		// Filter by rating.
		if ( isset( $_GET['rating_filter'] ) ) { // WPCS: input var ok, CSRF ok.
			$rating_filter = array_filter( array_map( 'absint', explode( ',', $_GET['rating_filter'] ) ) ); // WPCS: input var ok, CSRF ok, Sanitization ok.
			$rating_terms  = array();
			for ( $i = 1; $i <= 5; $i ++ ) {
				if ( in_array( $i, $rating_filter, true ) && isset( $product_visibility_terms[ 'rated-' . $i ] ) ) {
					$rating_terms[] = $product_visibility_terms[ 'rated-' . $i ];
				}
			}
			if ( ! empty( $rating_terms ) ) {
				$tax_query[] = array(
					'taxonomy'      => 'product_visibility',
					'field'         => 'term_taxonomy_id',
					'terms'         => $rating_terms,
					'operator'      => 'IN',
					'rating_filter' => true,
				);
			}
		}

		if ( ! empty( $product_visibility_not_in ) ) {
			$tax_query[] = array(
				'taxonomy' => 'product_visibility',
				'field'    => 'term_taxonomy_id',
				'terms'    => $product_visibility_not_in,
				'operator' => 'NOT IN',
			);
		}

		return array_filter( apply_filters( 'woocommerce_product_query_tax_query', $tax_query, $this ) );
	}