<?php

declare(strict_types=1);

namespace Domovoy\Services\Inventory;

use Domovoy\Models\DiscoveredHost;
use Domovoy\Repositories\DeviceRepository;

class MergeSuggestionService
{
    private DeviceRepository $deviceRepository;

    public function __construct(DeviceRepository $deviceRepository)
    {
        $this->deviceRepository = $deviceRepository;
    }

    /**
     * Find merge suggestions for a discovered host.
     * Returns array of ['device' => Device, 'confidence' => int, 'reason' => string]
     */
    public function findSuggestions(DiscoveredHost $host): array
    {
        $suggestions = [];

        // High confidence: MAC address match
        if ($host->macAddress !== null) {
            $device = $this->deviceRepository->findByMac($host->macAddress);
            if ($device !== null) {
                $suggestions[] = [
                    'device' => $device,
                    'confidence' => 90,
                    'reason' => 'MAC адрес совпадает',
                ];
            }
        }

        // Medium confidence: hostname match
        if ($host->hostname !== null) {
            $device = $this->deviceRepository->findByName($host->hostname);
            if ($device !== null) {
                $suggestions[] = [
                    'device' => $device,
                    'confidence' => 60,
                    'reason' => 'Hostname совпадает',
                ];
            }
        }

        if ($host->ipAddress !== '') {
            $device = $this->deviceRepository->findByIp($host->ipAddress);
            if ($device !== null) {
                $suggestions[] = [
                    'device' => $device,
                    'confidence' => 40,
                    'reason' => 'IP адрес совпадает',
                ];
            }
        }

        return $suggestions;
    }
}