<?php

declare(strict_types=1);

namespace OCA\F7Support\Service;

use OCP\IURLGenerator;
use OCP\Notification\IManager as INotificationManager;
use Psr\Log\LoggerInterface;

class PushBridgeService {
	private const PREVIEW_MAX = 240;

	public function __construct(
		private INotificationManager $notificationManager,
		private IURLGenerator $urlGenerator,
		private ConfigService $config,
		private LoggerInterface $logger,
	) {
	}

	public function notifyNewSupportMessage(
		string $userId,
		string $ticketNumber,
		string $messagePreview,
		?string $ticketSubject = null,
	): bool {
		if (!$this->config->isPushEnabled()) {
			return false;
		}

		$preview = $this->truncate($messagePreview);
		if ($preview === '') {
			$preview = 'Новый ответ от поддержки';
		}

		$subject = trim((string)$ticketSubject);
		$link = $this->urlGenerator->linkToRouteAbsolute('f7support.page.index')
			. '?ticket=' . rawurlencode($ticketNumber);

		$notification = $this->notificationManager->createNotification();
		$notification
			->setApp('f7support')
			->setUser($userId)
			->setDateTime(new \DateTime())
			->setObject('ticket', $ticketNumber)
			->setSubject('support_reply', [
				'ticketNumber' => $ticketNumber,
				'ticketSubject' => $subject,
				'preview' => $preview,
			])
			->setMessage('support_reply', [
				'preview' => $preview,
			])
			->setLink($link);

		try {
			$this->notificationManager->notify($notification);
			$this->logger->debug('f7support: push notification queued', [
				'app' => 'f7support',
				'user' => $userId,
				'ticket' => $ticketNumber,
			]);
			return true;
		} catch (\Throwable $e) {
			$this->logger->warning('f7support: failed to queue push notification', [
				'app' => 'f7support',
				'user' => $userId,
				'ticket' => $ticketNumber,
				'exception' => $e,
			]);
			return false;
		}
	}

	private function truncate(string $text): string {
		$text = trim(preg_replace('/\s+/u', ' ', $text) ?? $text);
		if ($text === '' || mb_strlen($text) <= self::PREVIEW_MAX) {
			return $text;
		}
		return mb_substr($text, 0, self::PREVIEW_MAX - 1) . '…';
	}
}