<?php
/*
 * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
 *
 *  Copyright (C) 2019 - 2026 Jan Böhmer (https://github.com/jbtronics)
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published
 *  by the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

declare(strict_types=1);


namespace App\Services\InfoProviderSystem;

use App\Entity\UserSystem\User;
use App\Exceptions\ProviderIDNotSupportedException;
use App\Services\InfoProviderSystem\DTOs\PartDetailDTO;
use App\Services\InfoProviderSystem\DTOs\SearchResultDTO;
use App\Services\InfoProviderSystem\Providers\InfoProviderInterface;
use Symfony\Bundle\SecurityBundle\Security;

final readonly class CreateFromUrlHelper
{
    public function __construct(private Security $security,
        private ProviderRegistry $providerRegistry,
        private PartInfoRetriever $infoRetriever,
    )
    {
    }

    /**
     * Checks if at least one provider can create parts from an URL and the current user is allowed to use it.
     * This is used to determine if the "From URL" feature should be shown to the user.
     * @return bool
     */
    public function canCreateFromUrl(): bool
    {
        if (!$this->security->isGranted('@info_providers.create_parts')) {
            return false;
        }

        //Check if either the generic web provider or the ai web provider is active
        $genericWebProvider = $this->providerRegistry->getProviderByKey('generic_web');
        $aiWebProvider = $this->providerRegistry->getProviderByKey('ai_web');

        return $genericWebProvider->isActive() || $aiWebProvider->isActive();
    }

    /**
     * Delegates the URL to another provider if possible, otherwise return null
     * @param  string  $url
     * @return SearchResultDTO|null
     */
    public function delegateToOtherProvider(string $url, InfoProviderInterface $callingInfoProvider): ?SearchResultDTO
    {
        //Extract domain from url:
        $host = parse_url($url, PHP_URL_HOST);
        if ($host === false || $host === null) {
            return null;
        }

        $provider = $this->providerRegistry->getProviderHandlingDomain($host);

        if ($provider !== null && $provider->isActive() && $provider->getProviderKey() !== $callingInfoProvider->getProviderKey()) {
            try {
                $id = $provider->getIDFromURL($url);
                if ($id !== null) {
                    $results = $this->infoRetriever->searchByKeyword($id, [$provider]);
                    if (count($results) > 0) {
                        return $results[0];
                    }
                }
                return null;
            } catch (ProviderIDNotSupportedException $e) {
                //Ignore and continue
                return null;
            }
        }

        return null;
    }

    /**
     * Delegates the URL to another provider if possible and returns the details, otherwise return null
     * @param  string  $url
     * @param  InfoProviderInterface  $callingInfoProvider
     * @return PartDetailDTO|null
     */
    public function delegateToOtherProviderDetails(string $url, InfoProviderInterface $callingInfoProvider): ?PartDetailDTO
    {
        $delegatedResult = $this->delegateToOtherProvider($url, $callingInfoProvider);
        if ($delegatedResult !== null) {
            return $this->infoRetriever->getDetailsForSearchResult($delegatedResult);
        }

        return null;
    }
}