<?php
// Digital Ocean server monitoring — read local /proc directly (no SSH loopback)

// CPU usage (sample over 200ms)
function getCpuPct(): float {
    $s1 = file_get_contents("/proc/stat");
    usleep(200000);
    $s2 = file_get_contents("/proc/stat");
    preg_match("/^cpu\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/m", $s1, $m1);
    preg_match("/^cpu\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/m", $s2, $m2);
    $idle1 = $m1[4]; $total1 = $m1[1]+$m1[2]+$m1[3]+$m1[4];
    $idle2 = $m2[4]; $total2 = $m2[1]+$m2[2]+$m2[3]+$m2[4];
    $dt = $total2 - $total1;
    return $dt > 0 ? round((1 - ($idle2 - $idle1) / $dt) * 100, 1) : 0;
}

$memLines = [];
foreach (file("/proc/meminfo") as $l) {
    [$k, $v] = explode(":", $l, 2) + [null, null];
    if ($k) $memLines[trim($k)] = (int)trim($v);
}
$memTotal = $memLines["MemTotal"] ?? 0;
$memFree  = $memLines["MemAvailable"] ?? 0;
$memUsed  = $memTotal - $memFree;

$uptime   = (int)explode(" ", file_get_contents("/proc/uptime"))[0];
$load     = (float)explode(" ", file_get_contents("/proc/loadavg"))[0];

$dfOut    = shell_exec("df / | tail -1 | awk {print }") ?? "";
$diskPct  = trim($dfOut);

// Services
$svcNames = ["lshttpd", "mysql", "redis"];
$svcMap   = [];
foreach ($svcNames as $s) {
    $status = trim(shell_exec("systemctl is-active " . escapeshellarg($s) . " 2>/dev/null") ?? "");
    if ($status === "active") $svcMap[$s] = true;
}

// Site health from kb_facts
$siteLabels = [
    "jarvis"       => "jarvis.orbishosting.com",
    "tomsjavajive" => "tomsjavajive.com",
    "epictravelexp"=> "epictravelexpeditions.com",
    "parkersling"  => "parkerslingshot",
    "orbishosting" => "orbishosting.com",
    "orbisportal"  => "orbis.orbishosting.com",
    "tomtomgames"  => "tomtomgames.com",
];
$sites = [];
$rows  = JarvisDB::query(
    "SELECT fact_key, fact_value FROM kb_facts WHERE category=sites AND updated_at > DATE_SUB(NOW(), INTERVAL 15 MINUTE) ORDER BY fact_key"
);
foreach ($rows as $r) {
    $label = $siteLabels[$r["fact_key"]] ?? $r["fact_key"];
    $sites[$label] = $r["fact_value"];
}

$uptimeDays = intdiv($uptime, 86400);
$uptimeHrs  = intdiv($uptime % 86400, 3600);

echo json_encode([
    "ip"           => DO_SERVER_IP,
    "reachable"    => true,
    "cpu_pct"      => getCpuPct(),
    "memory"       => [
        "total_mb" => round($memTotal / 1024),
        "used_mb"  => round($memUsed  / 1024),
        "percent"  => $memTotal > 0 ? round(($memUsed / $memTotal) * 100, 1) : 0,
    ],
    "disk_used_pct" => $diskPct,
    "load_1m"      => $load,
    "uptime"       => "{$uptimeDays}d {$uptimeHrs}h",
    "services"     => $svcMap,
    "sites"        => $sites,
    "timestamp"    => date("c"),
]);