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<?php
/*
Plugin Name: Automatic Email Testing With Telegram Alerts
Description: Logs 6-hour test emails and sends instant Telegram alerts on delivery failures.
Author: AZBrand.ca
*/

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

// 1. Register Custom 6-Hour WP-Cron Schedule
add_filter('cron_schedules', function($schedules) {
    $schedules['every_six_hours'] = ['interval' => 21600, 'display' => 'Every 6 Hours'];
    return $schedules;
});

// 2. Dispatch Test Email & Log with WP_Filesystem
function aet_send_email_and_alert() {
    $to = get_option('aet_email_address');
    $mail_sent = wp_mail($to, 'Scheduled Test', 'Automatic health check.');

    global $wp_filesystem;
    if (empty($wp_filesystem)) {
        require_once ABSPATH . 'wp-admin/includes/file.php';
        WP_Filesystem();
    }
    
    $log = '[' . gmdate('Y-m-d H:i:s') . '] Email : ' . ($mail_sent ? 'Success' : 'Failure');
    $wp_filesystem->put_contents(plugin_dir_path(__FILE__) . 'emaillog.txt', $log, FS_CHMOD_FILE);

    // 3. Telegram API Notification on Failure
    if (!$mail_sent) {
        $bot_id = get_option('aet_telegram_bot_id');
        $chat_id = get_option('aet_telegram_chat_id');
        $msg = "Failed email test from " . get_option('blogname');
        wp_remote_get("https://api.telegram.org/bot{$bot_id}/sendMessage?chat_id={$chat_id}&text=" . urlencode($msg));
    }
}