<?php
// This file is part of Moodle - http://moodle.org/

/**
 * Reset site access settings (role mapping or feature matrix) to built-in defaults.
 *
 * @package    mod_meetletacbfree
 * @copyright  2026 MeetLet
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

define('AJAX_SCRIPT', true);

require_once('../../../config.php');

use mod_meetletacbfree\local\featureaccess;
use mod_meetletacbfree\local\roles;

require_login();
require_capability('moodle/site:config', context_system::instance());
require_sesskey();

\mod_meetletacbfree\registration\manager::require_registered();

$section = required_param('section', PARAM_ALPHA);

header('Content-Type: application/json; charset=utf-8');

try {
    if ($section === 'rolemapping') {
        $rules = roles::builtin_site_defaults();
        $json = json_encode($rules, JSON_UNESCAPED_UNICODE);
        set_config('default_participants', $json, 'meetletacbfree');
        echo json_encode([
            'success' => true,
            'section' => 'rolemapping',
            'matrix' => roles::matrix_from_rules($rules),
            'message' => get_string('reset_success_rolemapping', 'meetletacbfree'),
        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        exit;
    }

    if ($section === 'featureaccess') {
        $matrix = featureaccess::builtin_defaults();
        $json = json_encode($matrix, JSON_UNESCAPED_UNICODE);
        set_config('featureaccess', $json, 'meetletacbfree');
        echo json_encode([
            'success' => true,
            'section' => 'featureaccess',
            'matrix' => $matrix,
            'message' => get_string('reset_success_featureaccess', 'meetletacbfree'),
        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        exit;
    }

    throw new moodle_exception('invalidparameter');
} catch (Throwable $e) {
    $error = $e->getMessage();
    if ($e instanceof moodle_exception) {
        $info = get_exception_info($e);
        if (!empty($info->message)) {
            $error = (string)$info->message;
        }
    }
    echo json_encode([
        'success' => false,
        'error' => $error !== '' ? $error : get_string('reset_error', 'meetletacbfree'),
    ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
}