<?php

declare(strict_types=1);

namespace App\Application\Admin;

use App\Application\Admin\Service\AdminLayoutProcessor;
use App\Framework\Attributes\Route;
use App\Framework\Auth\Auth;
use App\Framework\Core\VersionInfo;
use App\Framework\DateTime\Clock;
use App\Framework\Http\Method;
use App\Framework\Meta\MetaData;
use App\Framework\Performance\MemoryMonitor;
use App\Framework\Router\Result\ViewResult;
use App\Framework\Router\AdminRoutes;

final readonly class Dashboard
{
    public function __construct(
        private VersionInfo $versionInfo,
        private MemoryMonitor $memoryMonitor,
        private Clock $clock,
        private AdminLayoutProcessor $layoutProcessor,
    ) {
    }

    #[Auth]
    #[Route(path: '/admin', method: Method::GET, name: AdminRoutes::DASHBOARD)]
    public function show(): ViewResult
    {
        $data = [
            'title' => 'Admin Dashboard',
            'framework_version' => $this->versionInfo->getVersion(),
            'uptime_formatted' => $this->getServerUptime(),
            'memory_usage_formatted' => $this->memoryMonitor->getCurrentMemory()->toHumanReadable(),
            'peak_memory_formatted' => $this->memoryMonitor->getPeakMemory()->toHumanReadable(),
            'load_average' => $this->getLoadAverage(),
            'db_pool_size' => 10,
            'db_active_connections' => 3,
            'cache_hit_rate' => 85,
            'cache_total_operations' => number_format(12547),
            'requests_today' => number_format(1247),
            'errors_today' => 3,
            'last_deployment' => $this->clock->now()->format('Y-m-d H:i'),
            'clear_cache_url' => '/admin/infrastructure/cache/reset',
            'logs_url' => '/admin/infrastructure/logs',
            'migrations_url' => '/admin/infrastructure/migrations',
        ];

        $finalData = $this->layoutProcessor->processLayoutFromArray($data);

        // DEBUG: Log template data to see what's being passed
        error_log("🎯 Dashboard::show() - Final template data keys: " . implode(', ', array_keys($finalData)));
        error_log("🎯 Dashboard::show() - Navigation menu count: " . count($finalData['navigation_menu'] ?? []));
        error_log("🎯 Dashboard::show() - Framework version: " . ($finalData['framework_version'] ?? 'MISSING'));

        return new ViewResult(
            template: 'dashboard',
            metaData: new MetaData('Admin Dashboard', 'Administrative control panel'),
            data: $finalData
        );
    }

    private function getLoadAverage(): string
    {
        if (function_exists('sys_getloadavg')) {
            $load = sys_getloadavg();

            return sprintf('%.2f, %.2f, %.2f', $load[0], $load[1], $load[2]);
        }

        return 'N/A';
    }

    private function getServerUptime(): string
    {
        // Für Linux-Systeme
        if (function_exists('shell_exec') && stripos(PHP_OS, 'Linux') !== false) {
            $uptime = shell_exec('uptime -p');
            if ($uptime) {
                return $uptime;
            }
        }

        // Fallback
        return 'Nicht verfügbar';
    }
}