<?php
if (!defined('ABSPATH')) {
    exit;
}

class ALPHAGF_Addon_Manager {
    private static $_instance = null;
    public $addons = [];

    /**
     * Constructor
     */
    public function __construct() {
        add_action('gform_loaded', [$this, 'alphagf_addon_bootstrap'], 5);
        add_action('admin_enqueue_scripts', [$this, 'alphagf_admin_enqueue_scripts'], 999);
    }

    public function alphagf_admin_enqueue_scripts($hook) {

        if ($hook !== 'toplevel_page_gf_edit_forms' && $hook !== 'forms_page_gf_settings') {
            return;
        }

        wp_enqueue_style('alphagf_addons_admin_style', ALPHAGF_ASSETS . '/css/alphagf_addons_admin.css', [], ALPHAGF_VERSION);
    }

    /**
     * Register addons with Gravity Forms
     */
    public function alphagf_addon_bootstrap() {
        $this->addons = ALPHAGF_utilities::instance()->get_build_addons();

        if (! class_exists('GFAddOn') || ! class_exists('GF_Field')) {
            return;
        }

        include_once ALPHAGF_PATH . '/includes/core/class-field-group.php';

        $active = (array) get_option('alphagf_addons', []);

        foreach ($this->addons as $slug => $component) {

            if (! in_array($slug, $active, true)) {
                continue;
            }

            $file_path = ALPHAGF_PATH . '/includes/addons/' . $component['slug'] . '/' . $component['slug'] . '.php';

            if (file_exists($file_path)) {
                require_once $file_path;
            }

            // Only real Gravity Forms add-ons can be registered; GF calls get_instance() on every registered class.
            if (class_exists($component['class']) && is_subclass_of($component['class'], 'GFAddOn')) {
                GFAddOn::register($component['class']);
            }
        }
    }

    /**
     * Singleton instance
     */
    public static function instance() {
        if (is_null(self::$_instance)) {
            self::$_instance = new self();
        }
        return self::$_instance;
    }
}