
<?php
header('Content-Type: application/json');
echo json_encode([
    'status' => 'healthy',
    'server' => gethostname(),
    'ip' => $_SERVER['SERVER_ADDR'] ?? shell_exec('hostname -I | awk \'{print $1}\''),
    'timestamp' => date('c'),
    'php' => PHP_VERSION,
    'tracking' => [
        'clicks_today' => file_exists('/var/log/tracking/clicks.log') ? 
            (int)shell_exec("grep '".date('Y-m-d')."' /var/log/tracking/clicks.log 2>/dev/null | wc -l") : 0,
        'opens_today' => file_exists('/var/log/tracking/opens.log') ? 
            (int)shell_exec("grep '".date('Y-m-d')."' /var/log/tracking/opens.log 2>/dev/null | wc -l") : 0
    ]
]);