<?php
if (!defined('PHPWG_ROOT_PATH'))
{
  die('Hacking attempt!');
}

function bratonien_tools_nc_wizard_state()
{
  $state = isset($_SESSION['bratonien_nc_wizard']) && is_array($_SESSION['bratonien_nc_wizard']) ? $_SESSION['bratonien_nc_wizard'] : array();
  return array_merge(array(
    'step'=>1,'scan_ok'=>false,'base_url'=>'','host_input'=>'','username'=>'','display_name'=>'','version'=>'','product'=>'Nextcloud',
    'users'=>array(),'can_list_users'=>false,'showcase_user'=>'','connection_name'=>'','scan_message'=>'',
    'technical_stage'=>'reader_credentials','technical_source'=>'Noch nicht geprüft','technical_error'=>'','technical_complete'=>false,
    'db_host'=>'','db_port'=>'5432','db_database'=>'nextcloud','db_user'=>'','db_password_set'=>false,
    'source_view'=>'piwigo_showcase_sources','activity_view'=>'piwigo_showcase_activity','gallery_root'=>'','storages'=>array(),'storage_candidates'=>array(),
    'api_status'=>'pending','api_username'=>'','api_error'=>'','_password'=>'','_db_password'=>'','_api_key_id'=>'','_api_key_secret'=>'',
    '_fallback_user'=>'','_fallback_password'=>'',
  ), $state);
}

function bratonien_tools_nc_wizard_store(array $state) { $_SESSION['bratonien_nc_wizard'] = $state; }
function bratonien_tools_nc_wizard_reset() { unset($_SESSION['bratonien_nc_wizard']); return array('message'=>'Verbindungsassistent wurde zurückgesetzt.'); }

function bratonien_tools_nc_wizard_normalize_url($host)
{
  $host=trim((string)$host);
  if($host==='') throw new RuntimeException('Nextcloud-Adresse fehlt.');
  if(!preg_match('#^https?://#i',$host)) $host='https://'.$host;
  $parts=parse_url($host);
  if(!is_array($parts)||empty($parts['host'])) throw new RuntimeException('Die Nextcloud-Adresse ist ungültig.');
  $scheme=strtolower((string)($parts['scheme']??'https'));
  if(!in_array($scheme,array('http','https'),true)) throw new RuntimeException('Nextcloud muss per HTTP oder HTTPS erreichbar sein.');
  $url=$scheme.'://'.$parts['host'];
  if(!empty($parts['port'])) $url.=':'.(int)$parts['port'];
  if(!empty($parts['path'])&&$parts['path']!=='/') $url.='/'.trim($parts['path'],'/');
  return rtrim($url,'/');
}

function bratonien_tools_nc_wizard_candidate_urls($host)
{
  $host=trim((string)$host);
  if($host==='') throw new RuntimeException('Bitte die Adresse der Nextcloud angeben.');
  if(preg_match('#^https?://#i',$host)) return array(bratonien_tools_nc_wizard_normalize_url($host));
  return array(bratonien_tools_nc_wizard_normalize_url('https://'.$host),bratonien_tools_nc_wizard_normalize_url('http://'.$host));
}

function bratonien_tools_nc_wizard_http($url,$username='',$password='',array $headers=array())
{
  if(!function_exists('curl_init')) throw new RuntimeException('Der Server kann Nextcloud derzeit nicht per HTTP prüfen.');
  $ch=curl_init($url);
  $options=array(
    CURLOPT_RETURNTRANSFER=>true,CURLOPT_FOLLOWLOCATION=>true,CURLOPT_MAXREDIRS=>3,CURLOPT_CONNECTTIMEOUT=>8,CURLOPT_TIMEOUT=>15,
    CURLOPT_HTTPHEADER=>array_merge(array('Accept: application/json'),$headers),
    CURLOPT_USERAGENT=>'Bratonien-Tools-NC-Wizard/'.(function_exists('bratonien_tools_current_version')?bratonien_tools_current_version():'dev'),
  );
  if($username!==''){$options[CURLOPT_HTTPAUTH]=CURLAUTH_BASIC;$options[CURLOPT_USERPWD]=$username.':'.$password;}
  curl_setopt_array($ch,$options);
  $body=curl_exec($ch);$errno=curl_errno($ch);$status=(int)curl_getinfo($ch,CURLINFO_HTTP_CODE);curl_close($ch);
  if($body===false||$errno!==0) throw new RuntimeException('Verbindung fehlgeschlagen.');
  return array('status'=>$status,'body'=>(string)$body);
}

function bratonien_tools_nc_wizard_ocs_data($body)
{
  $decoded=json_decode((string)$body,true);
  if(!is_array($decoded)||!isset($decoded['ocs'])||!is_array($decoded['ocs'])) throw new RuntimeException('Nextcloud hat keine gültige Antwort geliefert.');
  $meta=isset($decoded['ocs']['meta'])&&is_array($decoded['ocs']['meta'])?$decoded['ocs']['meta']:array();
  $status=strtolower(trim((string)($meta['status']??'')));$status_code=isset($meta['statuscode'])?(int)$meta['statuscode']:0;
  if($status!=='ok'&&!in_array($status_code,array(100,200),true))
  {
    $message=trim((string)($meta['message']??''));
    if($message===''||strtolower($message)==='ok') $message='Nextcloud hat die Anfrage abgelehnt.';
    throw new RuntimeException($message);
  }
  return isset($decoded['ocs']['data'])&&is_array($decoded['ocs']['data'])?$decoded['ocs']['data']:array();
}

function bratonien_tools_nc_wizard_fill_profile(array &$state)
{
  $url_host=strtolower((string)parse_url($state['base_url'],PHP_URL_HOST));
  $state['db_host']='';
  $state['db_port']='5432';
  $state['db_database']='nextcloud';
  $state['source_view']='piwigo_showcase_sources';
  $state['activity_view']='piwigo_showcase_activity';
  $state['gallery_root']=rtrim(PHPWG_ROOT_PATH,'/').'/galleries/nextcloud';
  $state['technical_stage']='reader_credentials';
  $state['technical_source']='Noch nicht geprüft';
  $state['technical_error']='';
  $state['technical_complete']=false;

  foreach(bratonien_tools_nc_connector_connections() as $candidate)
  {
    $config=isset($candidate['config'])&&is_array($candidate['config'])?$candidate['config']:array();
    $candidate_url=trim((string)($config['nextcloud_url']??''));
    $match=false;
    if($candidate_url!=='')
    {
      try{$match=bratonien_tools_nc_wizard_normalize_url($candidate_url)===$state['base_url'];}catch(Throwable $ignored){$match=false;}
    }
    if(!$match) continue;

    $full=bratonien_tools_nc_connector_connection((int)$candidate['id'],true);
    if(!$full) continue;
    $credentials=bratonien_tools_nc_connector_credentials_from_blob($full['secret_blob']??'');
    $state['db_host']=(string)($config['host']??'');
    $state['db_port']=(string)($config['port']??'5432');
    $state['db_database']=(string)($config['database']??'nextcloud');
    $state['db_user']=(string)($config['user']??'');
    $state['_db_password']=(string)($credentials['db_password']??'');
    $state['db_password_set']=$state['_db_password']!=='';
    $state['source_view']=(string)($config['source_view']??$state['source_view']);
    $state['activity_view']=(string)($config['activity_view']??$state['activity_view']);
    $state['gallery_root']=(string)($config['gallery_root']??$state['gallery_root']);
    $state['storages']=isset($config['storages'])&&is_array($config['storages'])?$config['storages']:array();
    $state['storage_candidates']=$state['storages'];
    $state['technical_complete']=$state['db_host']!==''&&$state['db_user']!==''&&$state['db_password_set']&&!empty($state['storages']);
    $state['technical_stage']=$state['technical_complete']?'ready':'reader_credentials';
    $state['technical_source']='Passende vorhandene Verbindung übernommen';
    break;
  }

  if($state['db_host']==='') $state['db_host']=$url_host;
}

function bratonien_tools_nc_wizard_scan()
{
  $state=bratonien_tools_nc_wizard_state();
  $host_input=trim((string)($_POST['nc_wizard_host']??$state['host_input']));
  $username=trim((string)($_POST['nc_wizard_user']??$state['username']));
  $password=array_key_exists('nc_wizard_password',$_POST)?(string)$_POST['nc_wizard_password']:(string)$state['_password'];
  $state['step']=1;$state['host_input']=$host_input;$state['username']=$username;$state['_password']=$password;bratonien_tools_nc_wizard_store($state);
  if($username===''||$password==='') throw new RuntimeException('Nextcloud-Benutzer und Passwort werden für den Scan benötigt.');

  $base_url='';$status_data=null;
  foreach(bratonien_tools_nc_wizard_candidate_urls($host_input) as $candidate_url)
  {
    try
    {
      $response=bratonien_tools_nc_wizard_http($candidate_url.'/status.php');
      if($response['status']<200||$response['status']>=300) continue;
      $candidate_status=json_decode($response['body'],true);
      if(!is_array($candidate_status)||empty($candidate_status['installed'])) continue;
      $base_url=$candidate_url;$status_data=$candidate_status;break;
    }
    catch(Throwable $ignored){}
  }
  if($base_url===''||!is_array($status_data)) throw new RuntimeException('Unter dieser Adresse konnte keine Nextcloud erreicht werden. HTTP und HTTPS wurden automatisch geprüft.');

  $user_response=bratonien_tools_nc_wizard_http($base_url.'/ocs/v2.php/cloud/user?format=json',$username,$password,array('OCS-APIRequest: true'));
  if($user_response['status']===401||$user_response['status']===403) throw new RuntimeException('Nextcloud hat Benutzername oder Passwort abgelehnt.');
  if($user_response['status']<200||$user_response['status']>=300) throw new RuntimeException('Nextcloud ist erreichbar, aber die Anmeldung konnte nicht geprüft werden.');
  $user_data=bratonien_tools_nc_wizard_ocs_data($user_response['body']);

  $users=array();$can_list_users=false;
  try
  {
    $users_response=bratonien_tools_nc_wizard_http($base_url.'/ocs/v2.php/cloud/users?format=json',$username,$password,array('OCS-APIRequest: true'));
    if($users_response['status']>=200&&$users_response['status']<300)
    {
      $users_data=bratonien_tools_nc_wizard_ocs_data($users_response['body']);
      if(isset($users_data['users'])&&is_array($users_data['users']))
      {
        $users=array_values(array_filter(array_map('strval',$users_data['users'])));sort($users,SORT_NATURAL|SORT_FLAG_CASE);$can_list_users=true;
      }
    }
  }
  catch(Throwable $ignored){}

  $url_host=(string)parse_url($base_url,PHP_URL_HOST);
  $state=array_merge($state,array(
    'step'=>2,'scan_ok'=>true,'base_url'=>$base_url,'host_input'=>$host_input,
    'username'=>(string)($user_data['id']??$username),'display_name'=>(string)($user_data['display-name']??$user_data['displayname']??''),
    'version'=>(string)($status_data['versionstring']??$status_data['version']??''),'product'=>(string)($status_data['productname']??'Nextcloud'),
    'users'=>$users,'can_list_users'=>$can_list_users,'showcase_user'=>'','connection_name'=>$url_host!==''?$url_host:'Nextcloud',
    'scan_message'=>'Nextcloud wurde erkannt und der Benutzerzugriff wurde bestätigt.','_password'=>$password,'api_status'=>'pending','api_username'=>'','api_error'=>''
  ));
  bratonien_tools_nc_wizard_fill_profile($state);bratonien_tools_nc_wizard_store($state);
  return array('message'=>'Nextcloud wurde gefunden und der Zugang bestätigt.');
}

function bratonien_tools_nc_wizard_finish_data_access(array &$state)
{
  $config=array('host'=>$state['db_host'],'port'=>$state['db_port'],'database'=>$state['db_database'],'user'=>$state['db_user']);
  $password=(string)$state['_db_password'];
  bratonien_tools_nc_connector_psql($config,$password,'SELECT 1');

  $source_view=bratonien_tools_nc_connector_view_name($state['source_view']);
  $activity_view=bratonien_tools_nc_connector_view_name($state['activity_view']);
  bratonien_tools_nc_connector_psql($config,$password,'SELECT COUNT(*) FROM '.$source_view);
  bratonien_tools_nc_connector_psql($config,$password,'SELECT 1 FROM '.$activity_view.' LIMIT 1');

  $rows=bratonien_tools_nc_connector_psql($config,$password,"SELECT DISTINCT storage_id::text || E'\\t' || COALESCE(source_path, '') FROM ".$source_view." ORDER BY 1");
  $candidates=array();
  foreach(preg_split('/\r\n|\r|\n/',trim($rows)) as $line)
  {
    if($line==='') continue;
    $parts=explode("\t",$line,2);
    if(count($parts)!==2) continue;
    $storage_id=trim($parts[0]);$source_path=trim($parts[1],'/');
    if($storage_id==='') continue;
    $prefix=$source_path;
    if(strpos($source_path,'/')!==false) $prefix=substr($source_path,0,strpos($source_path,'/'));
    if(!isset($candidates[$storage_id])) $candidates[$storage_id]=array('storage_id'=>$storage_id,'source_prefix'=>$prefix,'local_mount'=>'');
  }
  if(!$candidates) throw new RuntimeException('Die Verbindung zur Datenquelle funktioniert, aber es wurden noch keine freigegebenen Speicherorte gefunden.');

  $known=array();
  foreach(bratonien_tools_nc_connector_connections() as $connection)
  {
    foreach(($connection['config']['storages']??array()) as $storage)
    {
      $key=(string)($storage['storage_id']??'').'|'.trim((string)($storage['source_prefix']??''),'/');
      if($key!=='|') $known[$key]=(string)($storage['local_mount']??'');
    }
  }
  foreach($candidates as &$candidate)
  {
    $key=$candidate['storage_id'].'|'.trim($candidate['source_prefix'],'/');
    if(!empty($known[$key])&&is_dir($known[$key])&&is_readable($known[$key])) $candidate['local_mount']=$known[$key];
  }
  unset($candidate);

  $state['storage_candidates']=array_values($candidates);
  $state['storages']=array_values(array_filter($state['storage_candidates'],function($storage){return trim((string)($storage['local_mount']??''))!=='';}));
  $state['technical_error']='';
  $state['technical_source']='Datenzugriff erfolgreich geprüft';
  $state['technical_complete']=count($state['storages'])===count($state['storage_candidates']);
  $state['technical_stage']=$state['technical_complete']?'ready':'mounts';
}

function bratonien_tools_nc_wizard_save_technical()
{
  $state=bratonien_tools_nc_wizard_state();
  if(empty($state['scan_ok'])) throw new RuntimeException('Bitte zuerst Nextcloud erfolgreich scannen.');

  $state['connection_name']=trim((string)($_POST['nc_wizard_connection_name']??$state['connection_name']));
  $state['db_user']=trim((string)($_POST['nc_wizard_db_user']??$state['db_user']));
  $db_password=array_key_exists('nc_wizard_db_password',$_POST)?(string)$_POST['nc_wizard_db_password']:(string)$state['_db_password'];
  if($db_password!==''){$state['_db_password']=$db_password;$state['db_password_set']=true;}

  $advanced=isset($_POST['nc_wizard_db_host'])||$state['technical_stage']==='database_details';
  if($advanced)
  {
    $state['db_host']=trim((string)($_POST['nc_wizard_db_host']??$state['db_host']));
    $state['db_port']=(string)max(1,min(65535,(int)($_POST['nc_wizard_db_port']??$state['db_port'])));
    $state['db_database']=trim((string)($_POST['nc_wizard_db_database']??$state['db_database']));
  }
  else
  {
    $state['db_host']=(string)parse_url($state['base_url'],PHP_URL_HOST);
    $state['db_port']='5432';
    $state['db_database']='nextcloud';
  }

  bratonien_tools_nc_wizard_store($state);
  if($state['db_user']===''||empty($state['db_password_set'])) throw new RuntimeException('Für den Datenzugriff werden Lese-Benutzer und Passwort benötigt.');
  if($state['db_host']===''||$state['db_database']==='') throw new RuntimeException('Die Adresse der Datenbank ist noch unvollständig.');

  try
  {
    bratonien_tools_nc_wizard_finish_data_access($state);
    bratonien_tools_nc_wizard_store($state);
    return array('message'=>$state['technical_complete']?'Datenzugriff wurde erfolgreich geprüft.':'Datenzugriff funktioniert. Ein Speicherort muss noch bestätigt werden.');
  }
  catch(Throwable $e)
  {
    $state['technical_error']=$e->getMessage();
    if(!$advanced)
    {
      $state['technical_stage']='database_details';
      bratonien_tools_nc_wizard_store($state);
      throw new RuntimeException('Der übliche Datenbankzugang konnte nicht automatisch bestätigt werden. Bitte die Datenbank-Adresse prüfen.');
    }
    bratonien_tools_nc_wizard_store($state);
    throw $e;
  }
}

function bratonien_tools_nc_wizard_save_mounts()
{
  $state=bratonien_tools_nc_wizard_state();
  $candidates=is_array($state['storage_candidates'])?$state['storage_candidates']:array();
  $mounts=isset($_POST['nc_wizard_storage_mount'])&&is_array($_POST['nc_wizard_storage_mount'])?$_POST['nc_wizard_storage_mount']:array();
  if(!$candidates) throw new RuntimeException('Es wurden noch keine Speicherorte erkannt.');
  $storages=array();
  foreach($candidates as $index=>$candidate)
  {
    $mount=trim((string)($candidate['local_mount']??''));
    if($mount==='') $mount=trim((string)($mounts[$index]??''));
    if($mount===''||$mount[0]!=='/') throw new RuntimeException('Für einen Speicherort fehlt ein gültiger lokaler Pfad.');
    $mount=rtrim($mount,'/');
    if(!is_dir($mount)||!is_readable($mount)) throw new RuntimeException('Der angegebene Speicherort ist nicht vorhanden oder nicht lesbar: '.$mount);
    $candidate['local_mount']=$mount;$storages[]=$candidate;
  }
  $state['storages']=$storages;$state['storage_candidates']=$storages;$state['technical_complete']=true;$state['technical_stage']='ready';$state['technical_error']='';bratonien_tools_nc_wizard_store($state);
  return array('message'=>'Speicherzuordnung wurde erfolgreich geprüft.');
}

function bratonien_tools_nc_wizard_select_user()
{
  $state=bratonien_tools_nc_wizard_state();
  if(empty($state['scan_ok'])) throw new RuntimeException('Bitte zuerst Nextcloud erfolgreich scannen.');
  if(empty($state['technical_complete'])) throw new RuntimeException('Die Verbindung ist noch nicht vollständig geprüft.');
  $showcase_user=trim((string)($_POST['nc_wizard_showcase_user']??''));
  $connection_name=trim((string)($_POST['nc_wizard_connection_name']??$state['connection_name']));
  if($showcase_user==='') throw new RuntimeException('Bitte den Benutzer auswählen, der die Showcase-Freigaben bereitstellt.');
  if($connection_name==='') throw new RuntimeException('Bitte einen Namen für die Verbindung angeben.');
  $state['connection_name']=$connection_name;$state['showcase_user']=$showcase_user;$state['step']=3;$state['api_error']='';bratonien_tools_nc_wizard_store($state);
  return array('message'=>'Showcase-Benutzer übernommen. Jetzt folgt der Piwigo-API-Zugang.');
}

function bratonien_tools_nc_wizard_api_test()
{
  $state=bratonien_tools_nc_wizard_state();
  if((int)$state['step']!==3) throw new RuntimeException('Der API-Test ist in diesem Assistentenschritt nicht verfügbar.');
  $posted_id=trim((string)($_POST['nc_wizard_api_key_id']??''));$posted_secret=trim((string)($_POST['nc_wizard_api_key_secret']??''));
  if($posted_id!=='')$state['_api_key_id']=$posted_id;if($posted_secret!=='')$state['_api_key_secret']=$posted_secret;bratonien_tools_nc_wizard_store($state);
  $key_id=trim((string)$state['_api_key_id']);$secret=trim((string)$state['_api_key_secret']);
  if($key_id===''&&$secret===''){$stored=bratonien_tools_nc_api_credentials();$key_id=trim((string)($stored['key_id']??''));$secret=trim((string)($stored['key_secret']??''));}
  if($key_id===''||$secret==='') throw new RuntimeException('API-Schlüssel-ID und API-Geheimnis fehlen.');
  try
  {
    $status=bratonien_tools_nc_connector_piwigo_api_request($key_id,$secret,'pwg.session.getStatus');
    $user_status=strtolower((string)($status['status']??''));
    if(!in_array($user_status,array('admin','webmaster'),true)) throw new RuntimeException('Der API-Key gehört keinem Piwigo-Administrator/Webmaster.');
    $method_result=bratonien_tools_nc_connector_piwigo_api_request($key_id,$secret,'reflection.getMethodList');$method_map=array();bratonien_tools_nc_connector_collect_method_names($method_result,$method_map);
    $missing=array_values(array_diff(array('bratonien.nc.syncProductive','bratonien.nc.syncOrphans'),array_keys($method_map)));
    if($missing) throw new RuntimeException('Benötigte Bratonien-Sync-Methoden fehlen: '.implode(', ',$missing).'.');
    $state['_api_key_id']=$key_id;$state['_api_key_secret']=$secret;$state['api_status']='ok';$state['api_username']=(string)($status['username']??$status['user']??'');$state['api_error']='';$state['step']=4;bratonien_tools_nc_wizard_store($state);
    return array('message'=>'Piwigo-API erfolgreich geprüft. Gespeichert wird sie erst beim Abschluss des Assistenten.');
  }
  catch(Throwable $e){$state['api_status']='error';$state['api_error']=$e->getMessage();bratonien_tools_nc_wizard_store($state);throw $e;}
}

function bratonien_tools_nc_wizard_api_skip()
{
  $state=bratonien_tools_nc_wizard_state();if((int)$state['step']!==3)throw new RuntimeException('Die API kann in diesem Assistentenschritt nicht übersprungen werden.');
  $state['api_status']='skipped';$state['api_error']='';$state['step']=4;bratonien_tools_nc_wizard_store($state);
  return array('message'=>'Piwigo-API wurde übersprungen. Für diese Verbindung ist deshalb ein Fallback-Zugang erforderlich.');
}

function bratonien_tools_nc_wizard_finish()
{
  $state=bratonien_tools_nc_wizard_state();
  if((int)$state['step']!==4||empty($state['technical_complete'])||trim((string)$state['showcase_user'])==='') throw new RuntimeException('Der Assistent ist noch nicht vollständig.');
  if(array_key_exists('nc_wizard_fallback_user',$_POST)) $state['_fallback_user']=trim((string)$_POST['nc_wizard_fallback_user']);
  if(array_key_exists('nc_wizard_fallback_password',$_POST)) $state['_fallback_password']=(string)$_POST['nc_wizard_fallback_password'];
  bratonien_tools_nc_wizard_store($state);
  $fallback_user=trim((string)$state['_fallback_user']);$fallback_password=(string)$state['_fallback_password'];
  if(($fallback_user==='')!==($fallback_password==='')) throw new RuntimeException('Fallback-Benutzer und Fallback-Passwort müssen entweder beide angegeben oder beide leer gelassen werden.');
  if($state['api_status']!=='ok'&&$fallback_user==='') throw new RuntimeException('Da die Piwigo-API übersprungen wurde, ist ein Fallback-Zugang erforderlich.');

  $storage_lines=array();
  foreach($state['storages'] as $storage)
  {
    $storage_lines[]=(string)$storage['storage_id'].' | '.trim((string)$storage['source_prefix'],'/').' | '.(string)$storage['local_mount'];
  }
  $_POST['nc_name']=(string)$state['connection_name'];$_POST['nc_host']=(string)$state['db_host'];$_POST['nc_port']=(string)$state['db_port'];$_POST['nc_database']=(string)$state['db_database'];$_POST['nc_user']=(string)$state['db_user'];$_POST['nc_db_password']=(string)$state['_db_password'];$_POST['nc_source_view']=(string)$state['source_view'];$_POST['nc_activity_view']=(string)$state['activity_view'];$_POST['nc_gallery_root']=(string)$state['gallery_root'];$_POST['nc_storages']=implode("\n",$storage_lines);$_POST['nc_quiet_seconds']='120';$_POST['nc_max_wait_seconds']='900';$_POST['nc_full_sync_seconds']='86400';$_POST['nc_piwigo_user']=$fallback_user;$_POST['nc_piwigo_password']=$fallback_password;$_POST['nc_nextcloud_url']=(string)$state['base_url'];$_POST['nc_showcase_user']=(string)$state['showcase_user'];$_POST['nc_access_user']=(string)$state['username'];$_POST['nc_product']=(string)$state['product'];$_POST['nc_version']=(string)$state['version'];$_POST['nc_api_validated']=$state['api_status']==='ok'?'1':'0';
  $result=bratonien_tools_nc_connector_create_local_api_first();$connection_id=(int)($result['connection_id']??0);
  try{if($state['api_status']==='ok')bratonien_tools_nc_api_credentials_store((string)$state['_api_key_id'],(string)$state['_api_key_secret']);}
  catch(Throwable $e){if($connection_id>0){$table=bratonien_tools_nc_connector_table();pwg_query("DELETE FROM `$table` WHERE id=".$connection_id." LIMIT 1");}throw new RuntimeException('Die Verbindung wurde nicht übernommen, weil der geprüfte API-Zugang nicht gespeichert werden konnte: '.$e->getMessage());}
  unset($_SESSION['bratonien_nc_wizard']);unset($result['connection_id']);$result['message']='Verbindung wurde vollständig durch den Assistenten angelegt. '.$result['message'];return $result;
}

function bratonien_tools_nc_connector_update_name()
{
  $id=(int)($_POST['connection_id']??0);$name=trim((string)($_POST['connection_name']??''));if($id<1||$name==='')throw new RuntimeException('Verbindung oder Name fehlt.');$connection=bratonien_tools_nc_connector_connection($id,false);if(!$connection)throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');$table=bratonien_tools_nc_connector_table();$now=date('Y-m-d H:i:s');pwg_query("UPDATE `$table` SET name='".pwg_db_real_escape_string($name)."', updated='".pwg_db_real_escape_string($now)."' WHERE id=".$id." LIMIT 1");return array('message'=>'Verbindungsname wurde aktualisiert.');
}

function bratonien_tools_nc_connector_update_technical()
{
  $id=(int)($_POST['connection_id']??0);$connection=bratonien_tools_nc_connector_connection($id,true);if(!$connection)throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');if(!empty($connection['enabled'])||(string)$connection['takeover_state']==='active')throw new RuntimeException('Technische Einstellungen einer aktiven Verbindung können nicht geändert werden. Bitte zuerst deaktivieren.');
  $config=$connection['config'];$port=(int)($_POST['nc_port']??($config['port']??5432));if($port<1||$port>65535)throw new RuntimeException('Ungültiger PostgreSQL-Port.');$gallery_root=rtrim(trim((string)($_POST['nc_gallery_root']??($config['gallery_root']??''))),'/');if($gallery_root===''||$gallery_root[0]!=='/')throw new RuntimeException('Der Galerie-Pfad muss ein absoluter Pfad sein.');
  $config['host']=trim((string)($_POST['nc_host']??($config['host']??'')));$config['port']=(string)$port;$config['database']=trim((string)($_POST['nc_database']??($config['database']??'')));$config['user']=trim((string)($_POST['nc_user']??($config['user']??'')));$config['source_view']=trim((string)($_POST['nc_source_view']??($config['source_view']??'')));$config['activity_view']=trim((string)($_POST['nc_activity_view']??($config['activity_view']??'')));$config['gallery_root']=$gallery_root;$config['quiet_seconds']=max(0,(int)($_POST['nc_quiet_seconds']??($config['quiet_seconds']??120)));$config['max_wait_seconds']=max(60,(int)($_POST['nc_max_wait_seconds']??($config['max_wait_seconds']??900)));$config['full_sync_seconds']=max(300,(int)($_POST['nc_full_sync_seconds']??($config['full_sync_seconds']??86400)));$config['storages']=bratonien_tools_nc_connector_parse_storages($_POST['nc_storages']??'');unset($config['verification']);bratonien_tools_nc_connector_view_name($config['source_view']);bratonien_tools_nc_connector_view_name($config['activity_view']);
  $credentials=bratonien_tools_nc_connector_credentials_from_blob($connection['secret_blob']??'');$db_password=(string)($_POST['nc_db_password']??'');if($db_password==='')$db_password=$credentials['db_password'];if($db_password==='')throw new RuntimeException('Datenbankpasswort fehlt.');$secret_blob=bratonien_tools_nc_connector_encrypt_credentials($db_password,$credentials['piwigo_user'],$credentials['piwigo_password']);$config_json=json_encode($config,JSON_UNESCAPED_UNICODE|JSON_UNESCAPED_SLASHES);if(!is_string($config_json))throw new RuntimeException('Connector-Konfiguration konnte nicht serialisiert werden.');$table=bratonien_tools_nc_connector_table();$now=date('Y-m-d H:i:s');pwg_query("UPDATE `$table` SET takeover_state='disabled', enabled=0, config_json='".pwg_db_real_escape_string($config_json)."', secret_blob='".pwg_db_real_escape_string($secret_blob)."', updated='".pwg_db_real_escape_string($now)."' WHERE id=".$id." LIMIT 1");return array('message'=>'Technische Verbindungseinstellungen wurden gespeichert. Die Verbindung muss erneut geprüft werden.');
}