<?php

declare(strict_types=1);

namespace App\Dashboard\Widget;

use App\Dashboard\Contract\DashboardWidgetProviderInterface;
use App\Entity\User;
use App\Model\DashboardWidget;
use App\Model\DashboardWidgetEntry;
use App\Repository\UserRepository;
use App\Security\Role;
use App\Service\RoleApprovalUrlGenerator;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;

/**
 * The accounts waiting on an administrator to act.
 *
 * A nomination grants nothing until it is approved. RoleNominationHandler emails the
 * administrators the moment one appears, but that fires once, on the login that produced it —
 * this widget is the standing list, and the only thing that still shows a nomination somebody
 * has left sitting.
 */
class PendingRoleApprovalsWidgetProvider implements DashboardWidgetProviderInterface
{
    private const LIMIT = 5;

    public function __construct(
        private readonly UserRepository $userRepository,
        private readonly UrlGeneratorInterface $urlGenerator,
        private readonly RoleApprovalUrlGenerator $approvalUrlGenerator,
    ) {
    }

    public function getRequiredRole(): string
    {
        return Role::ADMIN;
    }

    public function getPriority(): int
    {
        return 90;
    }

    public function build(): ?DashboardWidget
    {
        return new DashboardWidget(
            'Offene Rollenfreigaben',
            array_map(fn (User $user): DashboardWidgetEntry => new DashboardWidgetEntry(
                $this->label($user),
                $this->approvalUrlGenerator->forUser($user),
                'user',
            ), $this->userRepository->findWithPendingRoles(self::LIMIT)),
            'Keine offenen Rollenfreigaben.',
            $this->urlGenerator->generate('app_admin_user'),
            'Alle Benutzer',
        );
    }

    private function label(User $user): string
    {
        $nominated = Role::nominatedFrom($user->getRoles());

        if ([] === $nominated) {
            return $user->getDisplayName();
        }

        return sprintf('%s: %s', $user->getDisplayName(), implode(', ', $nominated));
    }
}