<?php
namespace Modules\Marketplace\Services;
use Illuminate\Support\Facades\DB;
use RuntimeException;
use Modules\Marketplace\Models\Installation;
use Modules\Marketplace\Models\InstalledPackage;
use Modules\Marketplace\Models\MarketplacePackage;
final class MarketplaceManager
{
    public function __construct(private PackageManifest $manifests,private CompatibilityChecker $compatibility,private DependencyResolver $dependencies) {}
    public function install(MarketplacePackage $package,?int $userId=null): InstalledPackage
    {
        if (!config('marketplace.enabled')) throw new RuntimeException('The marketplace is disabled.');
        $manifest=$this->manifests->parse($package->manifest ?: ['name'=>$package->package_name,'type'=>$package->type,'version'=>$package->latest_version]);
        $compatibility=$this->compatibility->check($manifest); if (!$compatibility['compatible']) throw new RuntimeException(implode(' ',$compatibility['errors']));
        $dependencies=$this->dependencies->resolve($manifest); if (!$dependencies['satisfied']) throw new RuntimeException('Package dependencies are not satisfied.');
        return DB::transaction(function() use ($package,$manifest,$userId) {
            $installed=InstalledPackage::query()->firstOrNew(['package_name'=>$package->package_name]); $from=$installed->exists?$installed->version:null;
            $installed->fill(['marketplace_package_id'=>$package->id,'type'=>$package->type,'version'=>$manifest['version'],'status'=>'installed','manifest'=>$manifest,'checksum'=>$package->checksum,'is_enabled'=>true,'installed_by'=>$userId,'installed_at'=>$installed->installed_at ?: now(),'updated_at_marketplace'=>now()])->save();
            $this->history($installed,$from?'update':'install',$from,$manifest['version'],$userId,'completed'); return $installed->refresh();
        });
    }
    public function setEnabled(InstalledPackage $package,bool $enabled,?int $userId=null): InstalledPackage
    {
        $package->update(['is_enabled'=>$enabled,'status'=>$enabled?'installed':'disabled']); $this->history($package,$enabled?'enable':'disable',$package->version,$package->version,$userId,'completed'); return $package->refresh();
    }
    public function remove(InstalledPackage $package,?int $userId=null): void
    {
        DB::transaction(function() use ($package,$userId) { $this->history($package,'remove',$package->version,null,$userId,'completed'); $package->update(['status'=>'removed','is_enabled'=>false]); });
    }
    public function rollback(InstalledPackage $package,Installation $installation,?int $userId=null): InstalledPackage
    {
        if ($installation->package_name!==$package->package_name || blank($installation->from_version)) throw new RuntimeException('This installation cannot be rolled back.');
        $current=$package->version; $package->update(['version'=>$installation->from_version,'status'=>'installed','is_enabled'=>true]);
        $this->history($package,'rollback',$current,$installation->from_version,$userId,'completed'); return $package->refresh();
    }
    private function history(InstalledPackage $package,string $operation,?string $from,?string $to,?int $userId,string $status): Installation
    { return Installation::query()->create(['installed_package_id'=>$package->id,'package_name'=>$package->package_name,'operation'=>$operation,'from_version'=>$from,'to_version'=>$to,'status'=>$status,'performed_by'=>$userId,'started_at'=>now(),'completed_at'=>now()]); }
}