<?php

declare(strict_types=1);

namespace Mod\Names\Actions;

use Illuminate\Support\Facades\Cache;
use Mod\Chain\Services\DaemonRpc;

/**
 * Check if a .lthn name is available for registration.
 *
 *   $result = CheckAvailability::run('mybrand');
 *   if ($result['available']) { ... }
 */
class CheckAvailability
{
    public function __construct(
        private readonly DaemonRpc $rpc,
    ) {}

    public function handle(string $name): array
    {
        $name = strtolower(trim($name));

        if (! preg_match('/^[a-z0-9][a-z0-9.\-]{0,254}$/', $name)) {
            return [
                'name' => $name,
                'available' => false,
                'reserved' => false,
                'reason' => 'Invalid name format.',
                'fqdn' => "{$name}.lthn",
            ];
        }

        $alias = $this->rpc->getAliasByName($name);
        $reserved = Cache::has("name_lock:{$name}");

        return [
            'name' => $name,
            'available' => $alias === null && ! $reserved,
            'reserved' => $reserved,
            'fqdn' => "{$name}.lthn",
        ];
    }

    public static function run(string $name): array
    {
        return app(static::class)->handle($name);
    }
}