<?php

declare(strict_types=1);

namespace App\Chatbot\Mcp\Tool;

use App\Chatbot\Mcp\ToolCallRunner;
use App\Chatbot\Search\ContentSearch;
use App\Repository\ContentDocumentRepository;
use Mcp\Capability\Attribute\McpTool;
use Mcp\Capability\Attribute\Schema;
use Mcp\Exception\ToolCallException;
use Mcp\Schema\Result\CallToolResult;
use Mcp\Schema\ToolAnnotations;

#[McpTool(
    name: 'get_document',
    description: 'Read the full text of one search_content hit, by its url. Editorial text can be out of date: take dates, prices, pickups and inclusions from search_trips and get_trip instead.',
    annotations: new ToolAnnotations(readOnlyHint: true, openWorldHint: false),
)]
final class GetDocumentTool
{
    private const BODY_LIMIT = 20000;

    public function __construct(
        private readonly ContentDocumentRepository $repository,
        private readonly ToolCallRunner $runner,
    ) {
    }

    public function __invoke(
        #[Schema(description: 'A url returned by search_content.', minLength: 1)]
        string $url,
    ): CallToolResult {
        return $this->runner->run('get_document', get_defined_vars(), function () use ($url): array {
            $document = $this->repository->findOneIndexedByUrl(trim($url));

            if (null === $document) {
                throw new ToolCallException('No document at this url. Use a url returned by search_content.');
            }

            $body = $document->getBodyMd();
            $truncated = mb_strlen($body) > self::BODY_LIMIT;

            return [
                'type' => ContentSearch::publicType($document->getType()),
                'title' => $document->getTitle(),
                'url' => $document->getUrl(),
                'site' => $document->getSite(),
                'breadcrumb' => $document->getBreadcrumb(),
                'body' => $truncated ? mb_substr($body, 0, self::BODY_LIMIT) : $body,
                'truncated' => $truncated,
            ];
        });
    }
}