<?php

declare(strict_types=1);

namespace App\Dashboard\Widget;

use App\Dashboard\Contract\DashboardWidgetProviderInterface;
use App\Entity\LogEntry;
use App\Model\DashboardWidget;
use App\Model\DashboardWidgetEntry;
use App\Repository\LogEntryRepository;
use App\Security\Role;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;

/**
 * What the application has been up to lately.
 *
 * The entries themselves are display only: a log line is a report, not somewhere to go, and
 * everything worth drilling into lives behind the log list's own filters — which is where the
 * card's header link leads.
 */
class RecentLogEntriesWidgetProvider implements DashboardWidgetProviderInterface
{
    private const LIMIT = 5;

    /**
     * Log messages have no length limit worth relying on, and the widget renders one line per
     * entry, so the message is cut to something a card can hold.
     */
    private const MESSAGE_LENGTH = 60;

    public function __construct(
        private readonly LogEntryRepository $logEntryRepository,
        private readonly UrlGeneratorInterface $urlGenerator,
    ) {
    }

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

    public function getPriority(): int
    {
        return 80;
    }

    public function build(): ?DashboardWidget
    {
        return new DashboardWidget(
            'Neueste Logeinträge',
            array_map(static fn (LogEntry $entry): DashboardWidgetEntry => new DashboardWidgetEntry(
                self::label($entry),
                null,
                'document',
            ), $this->logEntryRepository->findLatest(self::LIMIT)),
            'Keine Logeinträge vorhanden.',
            $this->urlGenerator->generate('app_admin_log'),
            'Alle Logeinträge',
        );
    }

    private static function label(LogEntry $entry): string
    {
        $message = (string) $entry->getMessage();

        if (mb_strlen($message) > self::MESSAGE_LENGTH) {
            $message = mb_substr($message, 0, self::MESSAGE_LENGTH).'…';
        }

        return sprintf(
            '%s %s: %s',
            $entry->getCreatedAt()?->format('d.m.Y H:i') ?? '',
            (string) $entry->getChannel(),
            $message,
        );
    }
}