<?php

namespace App\Console\Commands;

use App\Services\Api\LegacyApiAccessLogAnalyzer;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Storage;

class AnalyzeLegacyApiAccessLogs extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'api:analyze-legacy-access-logs
                            {paths* : Access-log files or glob patterns}
                            {--top=20 : Number of top entries per section}
                            {--no-report : Keinen JSON-Report schreiben}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Analysiert Legacy-API-Zugriffe aus Webserver-Access-Logs.';

    /**
     * Execute the console command.
     */
    public function handle(LegacyApiAccessLogAnalyzer $analyzer): int
    {
        $paths = array_map('strval', (array) $this->argument('paths'));
        $top = max(1, (int) $this->option('top'));
        $report = $analyzer->analyze($paths, $top);

        $this->info('Legacy-API-Access-Log-Auswertung');
        $this->newLine();
        $this->line("Dateien: {$report['summary']['files']}");
        $this->line("Log-Zeilen: {$report['summary']['total_lines']}");
        $this->line("Legacy-API-Requests: {$report['summary']['matched_requests']}");
        $this->line("Requests mit api_key: {$report['summary']['legacy_key_requests']}");
        $this->line("Eindeutige Client-IPs: {$report['summary']['unique_client_ips']}");
        $this->line("Eindeutige API-Key-Fingerprints: {$report['summary']['unique_api_key_fingerprints']}");

        if ($report['missing_paths'] !== []) {
            $this->newLine();
            $this->warn('Nicht lesbare Pfade:');
            foreach ($report['missing_paths'] as $path) {
                $this->line("  - {$path}");
            }
        }

        $this->renderTopTable('Top Endpoints', $report['endpoints']);
        $this->renderTopTable('Top Client-IPs', $report['client_ips']);
        $this->renderTopTable('Statuscodes', $report['status_codes']);

        if (! (bool) $this->option('no-report')) {
            $path = 'migration/legacy-api-access-'.now()->format('Ymd-His').'.json';
            Storage::disk('local')->put($path, json_encode($report, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
            $this->newLine();
            $this->line("Report geschrieben: storage/app/private/{$path}");
        }

        return self::SUCCESS;
    }

    /**
     * @param  array<string, int>  $rows
     */
    private function renderTopTable(string $title, array $rows): void
    {
        if ($rows === []) {
            return;
        }

        $this->newLine();
        $this->line($title);
        $this->table(
            ['Wert', 'Requests'],
            collect($rows)
                ->map(fn (int $count, string $value): array => [$value, $count])
                ->values()
                ->all()
        );
    }
}