<?php

namespace App\Http\Controllers\SyS;

use App\Http\Controllers\Controller;
use App\Services\Monitoring\HealthProbe;
use Illuminate\Contracts\View\View;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;
use Throwable;

/**
 * Systemstatus im Sysadmin-Bereich: dieselben Prüfungen wie `/health`,
 * dazu Umgebung und die zuletzt fehlgeschlagenen Jobs.
 */
class SystemStatusController extends Controller
{
    public function index(HealthProbe $probe): View
    {
        $checks = $probe->checks();

        return view('sys.status.index', [
            'checks' => $checks,
            'overall' => HealthProbe::worstStatus($checks),
            'environment' => [
                'Version' => config('app.version') ?? 'unbekannt',
                'Umgebung' => app()->environment(),
                'PHP' => PHP_VERSION,
                'Laravel' => app()->version(),
                'Queue-Treiber' => config('queue.default'),
                'Cache-Treiber' => config('cache.default'),
            ],
            'healthTokenConfigured' => filled(config('monitoring.health.token')),
            'horizonAvailable' => config('queue.default') === 'redis',
            'failedJobs' => $this->recentFailedJobs(),
        ]);
    }

    /**
     * @return Collection<int, array{uuid: ?string, job: string, queue: string, failed_at: string, error: string}>
     */
    private function recentFailedJobs(): Collection
    {
        try {
            $rows = DB::table('failed_jobs')->latest('failed_at')->limit(10)->get();
        } catch (Throwable) {
            return collect();
        }

        return $rows->map(fn (object $row): array => [
            'uuid' => $row->uuid ?? null,
            'job' => json_decode($row->payload, true)['displayName'] ?? 'unbekannt',
            'queue' => $row->connection.' / '.$row->queue,
            'failed_at' => (string) $row->failed_at,
            'error' => Str::limit(Str::before((string) $row->exception, "\n"), 200),
        ]);
    }
}