<?php
header('Content-Type: application/json');
header('Cache-Control: no-cache');
$load = sys_getloadavg();
$cores = (int)trim(shell_exec('nproc'));
$cpu = $cores > 0 ? round(($load[0] / $cores) * 100, 1) : 0;
if($cpu > 100) $cpu = 100;
$memInfo = shell_exec('free -m | grep Mem');
preg_match_all('/\d+/', $memInfo, $m);
$memTotal = (int)$m[0][0];
$memUsed = (int)$m[0][1];
$ram = $memTotal > 0 ? round(($memUsed / $memTotal) * 100, 1) : 0;
$disk = (float)trim(shell_exec("df / | tail -1 | awk '{print $5}' | tr -d '%'"));
echo json_encode(['cpu'=>$cpu,'ram'=>$ram,'storage'=>round($disk,1)]);