<?php

namespace App\Services\Infrastructure;

class ContaboInfrastructureSshKeyService
{
    /**
     * @return array{public_key: string, private_key: string}
     */
    public function generate(): array
    {
        $resource = openssl_pkey_new([
            'private_key_bits' => 4096,
            'private_key_type' => OPENSSL_KEYTYPE_RSA,
        ]);

        if ($resource === false) {
            throw new \RuntimeException('Failed to generate SSH key pair.');
        }

        openssl_pkey_export($resource, $privateKey);
        $details = openssl_pkey_get_details($resource);
        $publicKey = $details['key'] ?? '';

        if ($publicKey === '') {
            throw new \RuntimeException('Failed to export SSH public key.');
        }

        return [
            'public_key' => trim($publicKey)."\n",
            'private_key' => $privateKey,
        ];
    }
}