<?php

namespace App\Modules\System\Http;

use App\Http\Controllers\Controller;
use App\Modules\System\Domain\DeploymentCapabilities;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Storage;
use Throwable;

final class SystemHealthController extends Controller
{
    public function __invoke(DeploymentCapabilities $deployment): JsonResponse
    {
        $database = $this->probe(fn () => DB::select('select 1'));
        $storage = $this->probe(function (): void {
            $path = 'health/'.gethostname().'.probe';
            Storage::disk(config('filesystems.default'))->put($path, now()->toISOString());
            Storage::disk(config('filesystems.default'))->delete($path);
        });
        $heartbeat = Cache::get('system:scheduler-heartbeat');
        $queueHeartbeat = Cache::get('system:queue-heartbeat');
        $queue = config('queue.default') === 'sync'
            ? 'local'
            : ($queueHeartbeat && now()->diffInMinutes($queueHeartbeat) < 3 ? 'ok' : 'degraded');
        $services = [
            'api' => 'ok', 'database' => $database, 'storage' => $storage,
            'queue' => $queue,
            'scheduler' => $heartbeat && now()->diffInMinutes($heartbeat) < 3 ? 'ok' : 'degraded',
            'mail' => config('mail.default') === 'log' ? 'local' : 'configured',
            'websocket' => config('broadcasting.default') === 'log' ? 'degraded' : 'configured',
            'exportWorker' => $queue,
            'aiProvider' => config('ai.provider', 'local-structuring'),
        ];
        $ok = $database === 'ok' && $storage === 'ok';

        return response()->json(['data' => ['status' => $ok ? 'ok' : 'degraded', 'deploymentMode' => $deployment->mode()->value, 'services' => $services, 'checkedAt' => now()->toISOString()]], $ok ? 200 : 503);
    }

    private function probe(callable $callback): string
    {
        try {
            $callback();

            return 'ok';
        } catch (Throwable) {
            return 'failed';
        }
    }
}