<?php

namespace App\Tools;

use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;
use Prism\Prism\Tool;

/**
 * Websuche via lokaler SearXNG-Instanz - kein externer API-Key nötig.
 */
class WebSearchTool
{
    public function asPrismTool(): Tool
    {
        return (new Tool)
            ->as('web_search')
            ->for('Sucht im Web via SearXNG (Meta-Suchmaschine, lokal) und gibt die besten Treffer zurück.')
            ->withStringParameter('query', 'Die Suchanfrage')
            ->using(fn (string $query) => $this->execute($query));
    }

    public function execute(string $query): string
    {
        try {
            $response = Http::timeout(15)
                ->acceptJson()
                ->get(rtrim(config('services.searxng.url'), '/').'/search', [
                    'q' => $query,
                    'format' => 'json',
                    'language' => 'de',
                    'pageno' => 1,
                ]);
        } catch (\Throwable $e) {
            Log::warning('SearXNG nicht erreichbar', ['error' => $e->getMessage()]);

            return 'Suche fehlgeschlagen: '.$e->getMessage();
        }

        if (! $response->successful()) {
            return 'Suche fehlgeschlagen (HTTP '.$response->status().').';
        }

        $results = $response->json('results', []);

        if (empty($results)) {
            return 'Keine Treffer für: '.$query;
        }

        $lines = [];
        foreach (array_slice($results, 0, 5) as $i => $hit) {
            $lines[] = sprintf(
                "%d. %s\n   %s\n   %s",
                $i + 1,
                $hit['title'] ?? '(ohne Titel)',
                $hit['url'] ?? '',
                trim((string) ($hit['content'] ?? '')),
            );
        }

        return implode("\n\n", $lines);
    }
}