<?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. 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%)
        ];
    }
}