<?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_source'=>'Noch nicht geprüft',
    '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-Host fehlt.');
  if (!preg_match('#^https?://#i', $host)) $host = 'https://'.$host;
  $parts = parse_url($host);
  if (!is_array($parts) || empty($parts['host'])) throw new RuntimeException('Nextcloud-Host 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('cURL ist in PHP nicht verfügbar. Der Nextcloud-Scan kann nicht ausgeführt werden.');
  $ch = curl_init($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); $error=curl_error($ch); $status=(int)curl_getinfo($ch,CURLINFO_HTTP_CODE); curl_close($ch);
  if ($body===false || $errno!==0) throw new RuntimeException($error!==''?$error:'Verbindung fehlgeschlagen.');
  return array('status'=>$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 OCS-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));
  $state['db_host']=$url_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_source']='Noch nicht geprüft'; $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']??'')); $candidate_host=strtolower(trim((string)($config['host']??''))); $match=false;
    if ($candidate_url!=='') { try{$match=bratonien_tools_nc_wizard_normalize_url($candidate_url)===$state['base_url'];}catch(Throwable $ignored){$match=false;} }
    if (!$match&&$candidate_host!==''&&$candidate_host===$url_host) $match=true;
    if (!$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_host']); $state['db_port']=(string)($config['port']??$state['db_port']);
    $state['db_database']=(string)($config['database']??$state['db_database']); $state['db_user']=(string)($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['technical_source']='Vorhandene passende Verbindung erkannt';
    $state['technical_complete']=$state['db_host']!==''&&$state['db_port']!==''&&$state['db_database']!==''&&$state['db_user']!==''&&$state['db_password_set']&&$state['source_view']!==''&&$state['activity_view']!==''&&$state['gallery_root']!==''&&!empty($state['storages']);
    break;
  }
}

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_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'])); $state['db_host']=trim((string)($_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']));
  $state['db_user']=trim((string)($_POST['nc_wizard_db_user']??$state['db_user'])); $db_password=array_key_exists('nc_wizard_db_password',$_POST)?(string)$_POST['nc_wizard_db_password']:'';
  if($db_password!==''){$state['_db_password']=$db_password;$state['db_password_set']=true;} bratonien_tools_nc_wizard_store($state);
  if($state['connection_name']===''||$state['db_host']===''||$state['db_database']===''||$state['db_user']===''||empty($state['db_password_set'])) throw new RuntimeException('Die noch fehlenden Datenbankangaben müssen vollständig angegeben werden.');

  $config=array('host'=>$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,$password,"SELECT DISTINCT storage_id::text || E'\\t' || source_path FROM ".$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($parts[1],'/');$prefix=strpos($source_path,'/')!==false?substr($source_path,0,strpos($source_path,'/')):$source_path;if($storage_id!==''&&!isset($candidates[$storage_id]))$candidates[$storage_id]=array('storage_id'=>$storage_id,'source_prefix'=>$prefix,'local_mount'=>'');}
  if(!$candidates) throw new RuntimeException('Die Datenquelle ist erreichbar, liefert aber keine verwendbare Speicherzuordnung.');
  $known=array(); foreach(bratonien_tools_nc_connector_connections() as $connection){foreach(($connection['config']['storages']??array()) as $storage){$key=(string)($storage['storage_id']??'').'|'.(string)($storage['source_prefix']??'');if($key!=='|')$known[$key]=(string)($storage['local_mount']??'');}}
  foreach($candidates as &$candidate){$key=$candidate['storage_id'].'|'.$candidate['source_prefix'];if(!empty($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']??''))!=='';}));
  $state['technical_source']='Datenbank und Datenquelle erfolgreich geprüft';$state['technical_complete']=count($state['storages'])===count($state['storage_candidates']);bratonien_tools_nc_wizard_store($state);
  return array('message'=>$state['technical_complete']?'Technische Verbindung wurde erfolgreich geprüft.':'Die Verbindung wurde geprüft. Nur nicht erkannte Speicherorte müssen noch ergänzt werden.');
}

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 absoluter 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;$state['technical_complete']=true;bratonien_tools_nc_wizard_store($state);return array('message'=>'Speicherzuordnung ist vollständig.');
}

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)$storage['storage_id'].' | '.(string)$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.');
}