<?php

declare(strict_types=1);

namespace App\Mcp\Tool\TaskMeta;

use App\Entity\TaskGroup;
use App\Mcp\Tool\Serializer;
use App\Repository\ProjectRepository;
use Doctrine\ORM\EntityManagerInterface;
use InvalidArgumentException;
use Mcp\Capability\Attribute\McpTool;
use Symfony\Bundle\SecurityBundle\Security;
use Symfony\Component\Security\Core\Exception\AccessDeniedException;

use function sprintf;

#[McpTool(name: 'create-group', description: 'Create a new task group for a project')]
class CreateGroupTool
{
    public function __construct(
        private readonly EntityManagerInterface $entityManager,
        private readonly ProjectRepository $projectRepository,
        private readonly Security $security,
    ) {}

    public function __invoke(
        int $projectId,
        string $title,
        ?string $description = null,
        ?string $color = null,
    ): string {
        if (!$this->security->isGranted('ROLE_USER')) {
            throw new AccessDeniedException('Access denied: ROLE_USER required.');
        }

        $project = $this->projectRepository->find($projectId);
        if (null === $project) {
            throw new InvalidArgumentException(sprintf('Project with ID %d not found.', $projectId));
        }

        $group = new TaskGroup();
        $group->setProject($project);
        $group->setTitle($title);

        if (null !== $description) {
            $group->setDescription($description);
        }
        if (null !== $color) {
            $group->setColor($color);
        }

        $this->entityManager->persist($group);
        $this->entityManager->flush();

        return json_encode(Serializer::groupFull($group));
    }
}