<?php

namespace App\Services;

use App\Models\Domain;

class DnsRecordService
{
    public function buildForDomain(Domain $domain): array
    {
        // Quelle der Hostnamen: ENV (du hast BASE_DOMAIN, UI_SUB, WEBMAIL_SUB, MTA_SUB)
        $baseDomain = env('BASE_DOMAIN', 'example.com');
        $uiHost     = ($u = env('UI_SUB', 'ui'))       ? "$u.$baseDomain" : $baseDomain;
        $webmail    = ($w = env('WEBMAIL_SUB','webmail')) ? "$w.$baseDomain" : $baseDomain;
        $mtaHost    = ($m = env('MTA_SUB','mx'))       ? "$m.$baseDomain" : $baseDomain;

        $records = [];

        // A/AAAA – nur als Anzeigehilfe (optional)
        $records[] = [
            'type'  => 'A',
            'name'  => $domain->domain,
            'value' => 'DEINE.SERVER.IP', // optional: aus Installer einsetzen
            'ttl'   => 3600,
        ];

        // MX
        $records[] = [
            'type'  => 'MX',
            'name'  => $domain->domain,
            'value' => "10 $mtaHost.",
            'ttl'   => 3600,
        ];

        // SPF
        $records[] = [
            'type'  => 'TXT',
            'name'  => $domain->domain,
            'value' => 'v=spf1 mx a -all',
            'ttl'   => 3600,
        ];

        // DKIM (nimm den neuesten aktiven Key, falls vorhanden)
        /** @var DkimKey|null $dkim */
        $dkim = $domain->dkimKeys()->where('is_active', true)->latest()->first();
        if ($dkim) {
            $records[] = [
                'type'  => 'TXT',
                'name'  => "{$dkim->selector}._domainkey.{$domain->domain}",
                'value' => "v=DKIM1; k=rsa; p={$dkim->public_key_txt}",
                'ttl'   => 3600,
            ];
        }

        // DMARC (Default p=none – in UI änderbar)
        $records[] = [
            'type'  => 'TXT',
            'name'  => "_dmarc.{$domain->domain}",
            'value' => "v=DMARC1; p=none; rua=mailto:dmarc@{$domain->domain}; pct=100",
            'ttl'   => 3600,
        ];

        // Optional: Webmail/UI CNAMEs
        $records[] = ['type'=>'CNAME','name'=>"webmail.{$domain->domain}",'value'=>"$webmail.",'ttl'=>3600];
        $records[] = ['type'=>'CNAME','name'=>"ui.{$domain->domain}",     'value'=>"$uiHost.", 'ttl'=>3600];

        return $records;
    }
}