<?php
declare(strict_types=1);

namespace MageSail\Magesail\Model;

use Magento\Framework\App\Filesystem\DirectoryList;

/**
 * Per-tunnel PID, key, and log file paths under var/.
 */
class TunnelProcessPaths
{
    private const VAR_SUBDIR = 'magesail_tunnels';

    public function __construct(
        private readonly DirectoryList $directoryList
    ) {
    }

    public function getVarTunnelDir(): string
    {
        return $this->directoryList->getPath(DirectoryList::VAR_DIR) . '/' . self::VAR_SUBDIR;
    }

    public function getPidFilePath(string $tunnelId): string
    {
        return $this->getVarTunnelDir() . '/' . $this->sanitizeId($tunnelId) . '.pid';
    }

    public function getKeyFilePath(string $tunnelId): string
    {
        return $this->getVarTunnelDir() . '/' . $this->sanitizeId($tunnelId) . '.key';
    }

    public function getLogFilePath(string $tunnelId): string
    {
        return $this->directoryList->getPath(DirectoryList::LOG) . '/magesail_tunnel_' . $this->sanitizeId($tunnelId) . '.log';
    }

    /**
     * Legacy single-tunnel paths (pre multi-tunnel).
     */
    public function getLegacyPidFilePath(): string
    {
        return $this->directoryList->getPath(DirectoryList::VAR_DIR) . '/magesail.pid';
    }

    public function getLegacyKeyFilePath(): string
    {
        return $this->directoryList->getPath(DirectoryList::VAR_DIR) . '/magesail.key';
    }

    public function getLegacyLogFilePath(): string
    {
        return $this->directoryList->getPath(DirectoryList::LOG) . '/magesail_tunnel.log';
    }

    private function sanitizeId(string $tunnelId): string
    {
        return preg_replace('/[^a-zA-Z0-9_-]/', '', $tunnelId) ?: 'invalid';
    }
}