class ItemPage
{
    /**
     * Initializes item page
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return void
     */
    public static function init() {
        (new ConditionalAssetsLoader())->loadItemPageAssets(function () {
            $loadcore = apply_filters('wcexics_filter_load_item_page_default_css', true);
            if ($loadcore === true) {
                Loader::loadCoreCss();
                wp_enqueue_style(
                    'wcexics-item-page',
                    WCEXICS_PLUGIN_URL . '/src/Pages/ItemPage/item-page.css',
                    [],
                    WCEXICS_VERSION
                );
            }
            wp_enqueue_script(
                'wcexics-item-page',
                WCEXICS_DIST_JS_URL . '/item-page.js',
                [],
                WCEXICS_VERSION,
                true
            );
            do_action('wcexics_load_item_page_assets');
        });

        add_action('usces_theme_item_single_before_options', 'wcexics_combo_set_form');
        add_filter('usces_filter_item_sku_button', [get_class(), 'filterAddToCartButton'], 10, 1);
    }

    /**
     * Replaces `Add to Cart` input name with `wcexicsAddToCart` for custom processing
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @global \usc_e_shop $usces
     * @global \WP_Post $post
     * @param string $html
     * @return string
     */
    public static function filterAddToCartButton($html) {
        global $usces, $post;

        $comboset = ComboSet::getComboSetFromSkuCode($post->ID, $usces->itemsku['code']);
        if ($comboset instanceof GenericError) {
            return $html;
        }

        if (empty($comboset->getGroups())) {
            return $html;
        }

        $empty = true;
        foreach ($comboset->getGroups() as $group) {
            if (!empty($group->getItems())) {
                $empty = false;
                break;
            }
        }

        if ($empty === true) {
            return $html;
        }

        $id = $comboset->getId();
        $html = preg_replace('/name="inCart/', 'data-combo-set-id="' . $id . '" name="wcexicsAddToCart', $html);
        return $html;
    }
}