<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use App\Models\Setting;

class StorageProbe extends Command
{
    protected $signature = 'health:probe-disk {target=/}';
    protected $description = 'Speichert Storage-Werte (inkl. Breakdown) in settings:health.disk';

    public function handle(): int
    {
        $target = $this->argument('target') ?: '/';
        $data = $this->probe($target);

        Setting::set('health.disk', $data);
        Setting::set('health.disk_updated_at', now()->toIso8601String());

        $this->info(sprintf(
            'Storage %s → total:%dGB used:%dGB free_user:%dGB free+5%%:%dGB (%%used:%d)  breakdown: system=%.1fGB mails=%.1fGB backups=%.1fGB',
            $data['mount'],
            $data['total_gb'],
            $data['used_gb'],
            $data['free_gb'],
            $data['free_plus_reserve_gb'],
            $data['percent_used_total'],
            $data['breakdown']['system_gb'],
            $data['breakdown']['mails_gb'],
            $data['breakdown']['backup_gb'],
        ));

        return self::SUCCESS;
    }

    protected function probe(string $target): array
    {
        // --- df: Gesamtdaten des Filesystems (inkl. Reserve) -----------------
        $line = trim((string)@shell_exec('LC_ALL=C df -kP ' . escapeshellarg($target) . ' 2>/dev/null | tail -n1'));

        $device = $mount = '';
        $totalKb = $usedKb = $availKb = 0;

        if ($line !== '') {
            $p = preg_split('/\s+/', $line);
            if (count($p) >= 6) {
                $device = $p[0];
                $totalKb = (int)$p[1]; // TOTAL (inkl. Reserve)
                $usedKb = (int)$p[2]; // Used
                $availKb = (int)$p[3]; // Avail (User-sicht)
                $mount = $p[5];
            }
        }

        $toGiB_i = static fn($kb) => (int)round(max(0, (int)$kb) / (1024 * 1024));     // ganzzahlig (UI: Gesamt/Genutzt/Frei)
        $toGiB_f = static fn($kb) => round(max(0, (int)$kb) / (1024 * 1024), 1);        // eine Nachkommastelle (Breakdown/Legende)

        $totalGb = $toGiB_i($totalKb);
        $freeGb = $toGiB_i($availKb);               // user-verfügbar
        $usedGb = max(0, $totalGb - $freeGb);       // belegt inkl. Reserve
        $res5Gb = (int)round($totalGb * 0.05);     // 5% von Gesamt
        $freePlusReserveGb = min($totalGb, $freeGb + $res5Gb);
        $percentUsed = $totalGb > 0 ? (int)round($usedGb * 100 / $totalGb) : 0;

        // --- du: reale Verbräuche bestimmter Bäume (KB) -----------------------
        $duKb = function (string $path): int {
            if (!is_dir($path)) return 0;
            $kb = (int)trim((string)@shell_exec('LC_ALL=C du -sk --apparent-size ' . escapeshellarg($path) . ' 2>/dev/null | cut -f1'));
            return max(0, $kb);
        };

        $kbMails = $duKb('/var/mail/vhosts');
        $kbBackup = $duKb('/var/backups/mailwolt');

        // „System“ = alles übrige, was nicht Mails/Backups ist (OS, App, Logs, DB-Daten, …)
        $gbMails = $toGiB_f($kbMails);
        $gbBackup = $toGiB_f($kbBackup);

        // system_gb aus „usedGb – (mails+backup)“, nie negativ
        $gbSystem = max(0, round($usedGb - ($gbMails + $gbBackup), 1));

        return [
            'device' => $device ?: 'unknown',
            'mount' => $mount ?: $target,

            'total_gb' => $totalGb,
            'used_gb' => $usedGb,              // inkl. Reserve
            'free_gb' => $freeGb,              // User-sicht
            'reserve5_gb' => $res5Gb,              // Info
            'free_plus_reserve_gb' => $freePlusReserveGb,   // Anzeige „Frei“

            'percent_used_total' => $percentUsed,

            // Reale Breakdown-Werte
            'breakdown' => [
                'system_gb' => $gbSystem,
                'mails_gb' => $gbMails,
                'backup_gb' => $gbBackup,
            ],
        ];
    }
}

//
//namespace App\Console\Commands;
//
//use Illuminate\Console\Command;
//use App\Models\Setting;
//
//class StorageProbe extends Command
//{
//    protected $signature = 'health:probe-disk {target=/}';
//    protected $description = 'Speichert Storage-Werte (inkl. Frei+5%) in settings:health.disk';
//
//    public function handle(): int
//    {
//        $target = $this->argument('target') ?: '/';
//        $data   = $this->probe($target);
//
//        // Persistiert (DB + Redis) über dein Settings-Model
//        Setting::set('health.disk', $data);
//        Setting::set('health.disk_updated_at', now()->toIso8601String());
//
//        $this->info(sprintf(
//            'Storage %s → total:%dGB used:%dGB free_user:%dGB free+5%%:%dGB (%%used:%d)',
//            $data['mount'],
//            $data['total_gb'],
//            $data['used_gb'],
//            $data['free_gb'],
//            $data['free_plus_reserve_gb'],
//            $data['percent_used_total'],
//        ));
//
//        return self::SUCCESS;
//    }
//
//    protected function probe(string $target): array
//    {
//        $line = trim((string) @shell_exec('df -kP ' . escapeshellarg($target) . ' 2>/dev/null | tail -n1'));
//
//        $device = $mount = '';
//        $totalKb = $usedKb = $availKb = 0;
//
//        if ($line !== '') {
//            $p = preg_split('/\s+/', $line);
//            if (count($p) >= 6) {
//                $device  = $p[0];
//                $totalKb = (int) $p[1]; // TOTAL (inkl. Reserve)
//                $usedKb  = (int) $p[2]; // Used
//                $availKb = (int) $p[3]; // Avail (User-sicht)
//                $mount   = $p[5];
//            }
//        }
//
//        $toGiB = static fn($kb) => (int) round(max(0, (int)$kb) / (1024*1024));
//
//        $totalGb = $toGiB($totalKb);
//        $freeGb  = $toGiB($availKb);                  // user-verfügbar
//        $usedGb  = max(0, $totalGb - $freeGb);        // belegt inkl. Reserve
//        $res5Gb  = (int) round($totalGb * 0.05);      // 5% von Gesamt
//        $freePlusReserveGb = min($totalGb, $freeGb + $res5Gb);
//
//        $percentUsed = $totalGb > 0 ? (int) round($usedGb * 100 / $totalGb) : 0;
//
//        return [
//            'device'               => $device ?: 'unknown',
//            'mount'                => $mount ?: $target,
//
//            'total_gb'             => $totalGb,
//            'used_gb'              => $usedGb,              // inkl. Reserve
//            'free_gb'              => $freeGb,              // User-sicht
//            'reserve5_gb'          => $res5Gb,              // Info
//            'free_plus_reserve_gb' => $freePlusReserveGb,   // ← das willst du anzeigen
//
//            'percent_used_total'   => $percentUsed,         // fürs Donut (~15%)
//            'breakdown' => [
//                'system_gb'  => 5.2,  // OS, App, Logs …
//                'mails_gb'   => 2.8,  // /var/mail/vhosts
//                'backup_gb'  => 1.0,  // /var/backups/mailwolt (oder wohin du sicherst)
//            ],
//        ];
//    }
//}