<?php

namespace SmackCoders\AdvancedUserRoleManager;

if (!defined('ABSPATH')) {
    exit;
}

class ADVAUSRO_TimezoneManager
{
    private static ?ADVAUSRO_TimezoneManager $advausro_instance = null;

    private function __construct()
    {
        add_action('wp_ajax_advausro_update_timezone', [$this, 'advausro_update_timezone']);
    }

    public static function advausro_get_instance(): ADVAUSRO_TimezoneManager
    {
        if (self::$advausro_instance === null) {
            self::$advausro_instance = new self();
        }
        return self::$advausro_instance;
    }


    public function advausro_update_timezone()
    {
        check_ajax_referer('advausro_timezone_nonce', 'nonce');
        if (!current_user_can('manage_options')) {
            wp_send_json_error(['message' => esc_html__('Unauthorized access', 'advanced-use-role-management')]);
            wp_die();
        }

        $advausro_timezone = isset($_POST['timezone']) ? sanitize_text_field(wp_unslash($_POST['timezone'])) : '';

        if (empty($advausro_timezone)) {
            update_option('advausro_timezone_pending', false);
            wp_send_json_success(['message' => 'Timezone setting skipped', 'redirect' => admin_url('admin.php?page=advausro-role-manager')]);
        }

        $advausro_valid_timezones = timezone_identifiers_list();
        if (!in_array($advausro_timezone, $advausro_valid_timezones, true) && $advausro_timezone !== 'UTC') {
            wp_send_json_error(['message' => 'Invalid timezone selected']);
        }

        update_option('advausro_timezone_string', $advausro_timezone);
        update_option('advausro_gmt_offset', '');

        update_option('advausro_timezone_pending', false);
        wp_send_json_success(['message' => 'Timezone updated successfully', 'redirect' => admin_url('admin.php?page=advausro-role-manager')]);
    }
}