<?php
namespace App\Services\Licensing;

use App\Models\License;
use App\Models\LicenseProduct;
use App\Models\LicenseDeliveryOutbox;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Crypt;

final class LicenseIssuer
{
    public function issue(LicenseProduct $product, ?string $name, ?string $email, ?string $provider = null, ?string $orderID = null, ?string $customerID = null, bool $queueDelivery = false): array
    {
        return DB::transaction(function () use ($product,$name,$email,$provider,$orderID,$customerID,$queueDelivery) {
            if ($provider && $orderID) {
                $existing = License::where('payment_provider',$provider)->where('external_order_id',$orderID)->first();
                if ($existing) return [$existing, null];
            }
            $plain = LicenseKey::generate();
            $license = License::create([
                'license_product_id'=>$product->id,
                'license_key_hash'=>LicenseKey::hash($plain),
                'license_key_last4'=>substr(LicenseKey::normalize($plain), -4),
                'customer_name'=>$name,
                'customer_email'=>$email ? strtolower(trim($email)) : null,
                'edition'=>$product->edition,
                'activation_limit'=>$product->activation_limit,
                'max_major_version'=>$product->max_major_version,
                'payment_provider'=>$provider,
                'external_order_id'=>$orderID,
                'external_customer_id'=>$customerID,
            ]);
            if ($queueDelivery) {
                LicenseDeliveryOutbox::updateOrCreate(
                    ['license_id'=>$license->id],
                    ['encrypted_license_key'=>Crypt::encryptString($plain),'recipient_email'=>$license->customer_email,'delivered_at'=>null]
                );
            }
            return [$license, $plain];
        });
    }
}