<?php
defined('ABSPATH') || exit;

final class FormGuard_Forminator {
    public static function model(int $id) {
        if ($id < 1 || !class_exists('Forminator_Form_Model')) { return null; }
        try {
            $form = Forminator_Form_Model::get_model($id);
            return $form instanceof Forminator_Form_Model ? $form : null;
        } catch (\Throwable $error) { return null; }
    }

    public static function fields($form): array {
        if (!$form instanceof Forminator_Form_Model || !is_array($form->settings)) { return []; }
        // Only ordinary contact forms. Registration, login and quiz leads have
        // different side effects and must not be advertised as protected.
        if (!in_array($form->settings['form-type'] ?? 'default', ['default'], true)) { return []; }
        if (filter_var($form->settings['use_save_and_continue'] ?? false, FILTER_VALIDATE_BOOLEAN) || !empty($form->settings['abandonment'])) { return []; }
        try {
            $fields = [];
            foreach ($form->get_fields() as $field) {
                $schema = $field->to_array();
                $type = $schema['type'] ?? '';
                if (in_array($type, ['stripe', 'stripe-ocs', 'paypal', 'postdata', 'password', 'group'], true)) { return []; }
                $key = $schema['element_id'] ?? '';
                if (is_string($key) && preg_match('/^[a-zA-Z0-9_-]{1,100}$/', $key) && in_array($type, ['text', 'textarea', 'email'], true)) {
                    $fields[$key] = is_string($schema['field_label'] ?? null) ? $schema['field_label'] : $key;
                }
            }
            return $fields;
        } catch (\Throwable $error) { return []; }
    }

    public static function available(int $limit): array {
        if ($limit < 1 || !class_exists('Forminator_Form_Model')) { return []; }
        $available = [];
        foreach (get_posts(['post_type' => 'forminator_forms', 'post_status' => 'publish', 'numberposts' => $limit, 'orderby' => 'ID', 'order' => 'ASC']) as $post) {
            $fields = self::fields(self::model((int) $post->ID));
            if ($fields) { $available['forminator_' . (int) $post->ID] = ['title' => 'Forminator：' . $post->post_title, 'fields' => $fields]; }
        }
        return $available;
    }
}