<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\Storage;

class GenerateLicenseKeysCommand extends Command
{
    protected $signature = 'license:generate-keys {--force : Overwrite existing key pair}';

    protected $description = 'Generate a new application-wide license signing key pair.';

    public function handle(): int
    {
        $directory = 'license-keys';
        $privateKeyPath = $directory . '/private.pem';
        $publicKeyPath = $directory . '/public.pem';
        $disk = Storage::disk('local');

        $privateExists = $disk->exists($privateKeyPath);
        $publicExists = $disk->exists($publicKeyPath);

        if (($privateExists || $publicExists) && !$this->option('force')) {
            $this->error('Key pair already exists. Use --force to overwrite.');
            return 1;
        }

        $keyPair = $this->generateKeyPair();
        $disk->put($privateKeyPath, $keyPair['privateKey']);
        $disk->put($publicKeyPath, $keyPair['publicKey']);

        $this->info('Generated application license key pair.');
        $this->line('Private key: ' . $privateKeyPath);
        $this->line('Public key: ' . $publicKeyPath);

        return 0;
    }

    protected function generateKeyPair(): array
    {
        $privateKey = openssl_pkey_new([
            'private_key_bits' => 2048,
            'private_key_type' => OPENSSL_KEYTYPE_RSA,
        ]);

        openssl_pkey_export($privateKey, $privateKeyPem);
        $publicKeyDetails = openssl_pkey_get_details($privateKey);

        return [
            'privateKey' => $privateKeyPem,
            'publicKey' => $publicKeyDetails['key'],
        ];
    }
}