<?php
declare(strict_types=1);

namespace Esun\CustomerMessage\Block\Account;

use Esun\CustomerMessage\Model\ConversationService;
use Magento\Customer\Block\Account\SortLink;
use Magento\Customer\Model\Session;
use Magento\Framework\App\DefaultPathInterface;
use Magento\Framework\View\Element\Template\Context;

class NavigationLink extends SortLink
{
    private ?int $unreadCount = null;

    public function __construct(Context $context, DefaultPathInterface $defaultPath, private readonly Session $session, private readonly ConversationService $conversations, array $data = [])
    {
        parent::__construct($context, $defaultPath, $data);
    }

    public function getUnreadCount(): int
    {
        if ($this->unreadCount === null) {
            $customerId = (int)$this->session->getCustomerId();
            $this->unreadCount = $customerId > 0
                ? $this->conversations->getCustomerUnreadTotal($customerId)
                : 0;
        }

        return $this->unreadCount;
    }
}