<?php

namespace App\Services\Mne;

use Illuminate\Support\Facades\DB;

final class SectorResolver
{
    public const VERSION = 1;

    public function resolve(int $legacyId): ?string
    {
        $id = DB::table('mne.sector_links as l')->join('public.sectors as s', 's.id', '=', 'l.sector_id')
            ->where('l.sector_id', $legacyId)->where('l.resolver_version', self::VERSION)
            ->where('l.status', 'active')->where('s.is_active', true)->whereNull('s.deleted_at')
            ->whereColumn('l.source_code', 's.slug')->where('l.valid_from', '<=', now())
            ->where(fn ($q) => $q->whereNull('l.valid_until')->orWhere('l.valid_until', '>', now()))
            ->value('l.canonical_sector_id');

        return is_string($id) ? $id : null;
    }
}