<?php

declare(strict_types=1);

namespace Domovoy\Services\Discovery;

class HostFingerprintService
{
    /**
     * Guess vendor based on open ports and hostname.
     */
    public function guessVendor(array $openPorts, ?string $hostname): ?string
    {
        $portVendorMap = [
            9100 => 'HP/Printer',
            631 => 'CUPS/Apple',
            548 => 'Apple/AFP',
            445 => 'Microsoft/SMB',
            22 => null, // Too common
        ];

        foreach ($portVendorMap as $port => $vendor) {
            if ($vendor !== null && in_array($port, $openPorts, true)) {
                return $vendor;
            }
        }

        if ($hostname !== null) {
            $hostname = strtolower($hostname);
            if (str_contains($hostname, 'apple') || str_contains($hostname, 'macbook') || str_contains($hostname, 'iphone')) {
                return 'Apple';
            }
            if (str_contains($hostname, 'synology') || str_contains($hostname, 'nas')) {
                return 'Synology';
            }
            if (str_contains($hostname, 'router') || str_contains($hostname, 'gateway')) {
                return 'Router/Network';
            }
        }

        return null;
    }

    /**
     * Calculate confidence score 0-100 based on found data.
     */
    public function calculateConfidence(int $openPortCount, bool $hasHostname): int
    {
        $score = 10; // Base: host is alive

        if ($openPortCount > 0) {
            $score += min(40, $openPortCount * 5);
        }

        if ($hasHostname) {
            $score += 30;
        }

        return min(100, $score);
    }
}