<?php
/* Copyright (C) 2023		Laurent Destailleur			<eldy@users.sourceforge.net>
 * Copyright (C) 2026		Eduard Wisch				<data@data-it-solution.de>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

/**
 * \file    subtotaltitle/class/actions_subtotaltitle.class.php
 * \ingroup subtotaltitle
 * \brief   Hook overload for SubtotalTitle module
 */

require_once DOL_DOCUMENT_ROOT.'/core/class/commonhookactions.class.php';
require_once __DIR__.'/DocumentTypeHelper.class.php';

/**
 * Class ActionsSubtotalTitle
 */
class ActionsSubtotalTitle extends CommonHookActions
{

    private $debug = 0; // Wird dynamisch aus Config geladen

    // Gemeinsames Array für gerenderte Sections
    private static $rendered_sections = array();

    // Aktueller Dokumentkontext (wird in formObjectOptions/printObjectLine gesetzt)
    private $currentDocType = null;
    private $currentDocumentId = null;
    private $isDraft = false;

    /**
     * @var DoliDB Database handler.
     */
    public $db;

    /**
     * Helper-Methode: Erstellt WHERE-Klausel für document_id
     */
    private function getDocumentWhere($document_id, $docType, $tableAlias = 'm')
    {
        global $db;
        $tables = DocumentTypeHelper::getTableNames($docType);
        if (!$tables) return "";
        return " WHERE ".$tableAlias.".".$tables['fk_parent']." = ".(int)$document_id." AND ".$tableAlias.".document_type = '".$db->escape($docType)."'";
    }
    
    /**
     * @var string Error code (or message)
     */
    public $error = '';
    
    /**
     * @var string[] Errors
     */
    public $errors = array();
    
    /**
     * @var mixed[] Hook results. Propagated to $hookmanager->resArray for later reuse
     */
    public $results = array();
    
    /**
     * @var ?string String displayed by executeHook() immediately after return
     */
    public $resprints;
    
    /**
     * @var int		Priority of hook (50 is used if value is not defined)
     */
    public $priority;
    
    
    /**
     * Constructor
     *
     *  @param	DoliDB	$db      Database handler
     */
    public function __construct($db)
    {
        global $conf;
        $this->db = $db;

        // Debug-Modus aus Config laden
        $this->debug = getDolGlobalInt('SUBTOTALTITLE_DEBUG_MODE', 0);

        // IMMER Debug-Log in Datei schreiben
        $logFile = '/srv/http/dolibarr/documents/subtotaltitle/debug.log';
        @mkdir(dirname($logFile), 0777, true);
        error_log('['.date('Y-m-d H:i:s').'] SubtotalTitle Constructor aufgerufen'."\n", 3, $logFile);
    }
    
    
    public function formObjectOptions($parameters, &$object, &$action, $hookmanager)
    {
        global $conf, $langs;

        // Prüfe ob es ein unterstützter Kontext ist
        $supportedContexts = array('invoicecard', 'propalcard', 'ordercard');
        $currentContexts = explode(':', $parameters['currentcontext']);
        $isSupported = false;
        foreach ($supportedContexts as $ctx) {
            if (in_array($ctx, $currentContexts)) {
                $isSupported = true;
                break;
            }
        }

        if ($isSupported) {
            // Setze Klassenvariablen für den aktuellen Dokumentkontext
            $this->currentDocType = DocumentTypeHelper::getTypeFromObject($object);
            $this->currentDocumentId = $object->id;

            // Prüfe ob Dokument bearbeitbar ist (nur im Entwurfsstatus)
            $this->isDraft = false;
            if (isset($object->statut)) {
                $this->isDraft = ($object->statut == 0);
                // Debug-Log
                $logFile = '/srv/http/dolibarr/documents/subtotaltitle/debug.log';
                error_log('['.date('Y-m-d H:i:s').'] formObjectOptions - DocType: '.$this->currentDocType.', statut: '.$object->statut.', isDraft: '.($this->isDraft ? 'true' : 'false')."\n", 3, $logFile);
            } elseif (isset($object->status)) {
                $this->isDraft = ($object->status == 0);
                // Debug-Log
                $logFile = '/srv/http/dolibarr/documents/subtotaltitle/debug.log';
                error_log('['.date('Y-m-d H:i:s').'] formObjectOptions - DocType: '.$this->currentDocType.', status: '.$object->status.', isDraft: '.($this->isDraft ? 'true' : 'false')."\n", 3, $logFile);
            }
            $is_draft = $this->isDraft;

            // Lade Übersetzungen
            $langs->load('subtotaltitle@subtotaltitle');

            // CSS
            $cssPath = dol_buildpath('/custom/subtotaltitle/css/subtotaltitle.css', 1);
            echo '<link rel="stylesheet" type="text/css" href="'.$cssPath.'">'."\n";

            // Übersetzungen als JavaScript-Variablen bereitstellen
            echo '<script type="text/javascript">'."\n";
            echo 'var subtotalTitleIsDraft = '.($this->isDraft ? 'true' : 'false').';'."\n";
            echo 'var subtotalTitleLang = {'."\n";
            echo '  buttonCreateTextline: '.json_encode($langs->trans('ButtonCreateTextline')).','."\n";
            echo '  buttonToInvoice: '.json_encode($langs->trans('ButtonToInvoice')).','."\n";
            echo '  buttonFromInvoice: '.json_encode($langs->trans('ButtonFromInvoice')).','."\n";
            echo '  buttonExpandAll: '.json_encode($langs->trans('ButtonExpandAll')).','."\n";
            echo '  buttonCollapseAll: '.json_encode($langs->trans('ButtonCollapseAll')).','."\n";
            echo '  buttonMassDelete: '.json_encode($langs->trans('ButtonMassDelete')).','."\n";
            echo '  buttonDelete: '.json_encode($langs->trans('ButtonDelete')).','."\n";
            echo '  buttonEdit: '.json_encode($langs->trans('ButtonEdit')).','."\n";
            echo '  buttonSave: '.json_encode($langs->trans('ButtonSave')).','."\n";
            echo '  buttonCancel: '.json_encode($langs->trans('ButtonCancel')).','."\n";
            echo '  sectionCreate: '.json_encode($langs->trans('SectionCreate')).','."\n";
            echo '  sectionName: '.json_encode($langs->trans('SectionName')).','."\n";
            echo '  sectionSubtotal: '.json_encode($langs->trans('SectionSubtotal')).','."\n";
            echo '  productCount: '.json_encode($langs->trans('ProductCount')).','."\n";
            echo '  confirmMassDelete: '.json_encode($langs->trans('ConfirmMassDelete')).','."\n";
            echo '  confirmDeleteSection: '.json_encode($langs->trans('ConfirmDeleteSection')).','."\n";
            echo '  confirmDeleteSectionForce: '.json_encode($langs->trans('ConfirmDeleteSectionForce')).','."\n";
            echo '  confirmDeleteSectionForce2: '.json_encode($langs->trans('ConfirmDeleteSectionForce2')).','."\n";
            echo '  confirmDeleteTextline: '.json_encode($langs->trans('ConfirmDeleteTextline')).','."\n";
            echo '  confirmRemoveFromSection: '.json_encode($langs->trans('ConfirmRemoveFromSection')).','."\n";
            echo '  confirmDeleteLines: '.json_encode($langs->trans('ConfirmDeleteLines')).','."\n";
            echo '  confirmDeleteLinesWarning: '.json_encode($langs->trans('ConfirmDeleteLinesWarning')).','."\n";
            echo '  noLinesSelected: '.json_encode($langs->trans('NoLinesSelected')).','."\n";
            echo '  errorLoadingSections: '.json_encode($langs->trans('ErrorLoadingSections')).','."\n";
            echo '  errorSavingSection: '.json_encode($langs->trans('ErrorSavingSection')).','."\n";
            echo '  errorDeletingSection: '.json_encode($langs->trans('ErrorDeletingSection')).','."\n";
            echo '  errorReordering: '.json_encode($langs->trans('ErrorReordering')).','."\n";
            echo '  successSectionCreated: '.json_encode($langs->trans('SuccessSectionCreated')).','."\n";
            echo '  successSectionUpdated: '.json_encode($langs->trans('SuccessSectionUpdated')).','."\n";
            echo '  successSectionDeleted: '.json_encode($langs->trans('SuccessSectionDeleted')).','."\n";
            echo '  successReordered: '.json_encode($langs->trans('SuccessReordered')).','."\n";
            echo '  textlineContent: '.json_encode($langs->trans('TextlineContent')).','."\n";
            echo '  errorSavingTextline: '.json_encode($langs->trans('ErrorSavingTextline')).','."\n";
            echo '  errorDeletingTextline: '.json_encode($langs->trans('ErrorDeletingTextline')).','."\n";
            echo '  successTextlineCreated: '.json_encode($langs->trans('SuccessTextlineCreated')).','."\n";
            echo '  successTextlineUpdated: '.json_encode($langs->trans('SuccessTextlineUpdated')).','."\n";
            echo '  successTextlineDeleted: '.json_encode($langs->trans('SuccessTextlineDeleted')).','."\n";
            echo '  syncToInvoice: '.json_encode($langs->trans('SyncToInvoice')).','."\n";
            echo '  syncFromInvoice: '.json_encode($langs->trans('SyncFromInvoice')).','."\n";
            echo '  confirmRemoveLine: '.json_encode($langs->trans('ConfirmRemoveLine')).','."\n";
            echo '  confirmSyncAll: '.json_encode($langs->trans('ConfirmSyncAll')).','."\n";
            echo '  confirmRemoveAll: '.json_encode($langs->trans('ConfirmRemoveAll')).','."\n";
            echo '  allElementsAlreadyInInvoice: '.json_encode($langs->trans('AllElementsAlreadyInInvoice')).','."\n";
            echo '  noElementsInInvoice: '.json_encode($langs->trans('NoElementsInInvoice')).','."\n";
            echo '  elementsAddedToInvoice: '.json_encode($langs->trans('ElementsAddedToInvoice')).','."\n";
            echo '  elementsRemovedFromInvoice: '.json_encode($langs->trans('ElementsRemovedFromInvoice')).','."\n";
            echo '  elementsAddedWithErrors: '.json_encode($langs->trans('ElementsAddedWithErrors')).','."\n";
            echo '  elementsRemovedWithErrors: '.json_encode($langs->trans('ElementsRemovedWithErrors')).','."\n";
            echo '  successSyncedToInvoice: '.json_encode($langs->trans('SuccessSyncedToInvoice')).','."\n";
            echo '  successRemovedFromInvoice: '.json_encode($langs->trans('SuccessRemovedFromInvoice')).','."\n";
            echo '  errorSyncing: '.json_encode($langs->trans('ErrorSyncing'))."\n";
            echo '};'."\n";
            echo '</script>'."\n";

            // Haupt-JavaScript
            $jsPath = dol_buildpath('/custom/subtotaltitle/js/subtotaltitle.js', 1);
            echo '<script type="text/javascript" src="'.$jsPath.'"></script>'."\n";

            // Sync-JavaScript (NEU!)
            $jsSyncPath = dol_buildpath('/custom/subtotaltitle/js/subtotaltitle_sync.js', 1);
            echo '<script type="text/javascript" src="'.$jsSyncPath.'"></script>'."\n";

            // Buttons nur im Entwurfsstatus anzeigen
            if ($is_draft) {
                // Textzeile-Button
                echo '<script>$(document).ready(function() {';
                echo '  if ($(".tabsAction").length > 0) {';
                echo '    $(".tabsAction").find("a.butAction:first").after(\'<a class="butAction" href="#" onclick="createTextLine(); return false;">\' + subtotalTitleLang.buttonCreateTextline + \'</a>\');';
                echo '  }';
                echo '});</script>'."\n";

                // Massenlösch-Button (ans ENDE der Hauptzeile) - NUR EINMAL EINFÜGEN
                echo '<script>$(document).ready(function() {';
                echo '  if ($("#btnMassDelete").length === 0) {';
                echo '    $(".tabsAction").first().append(\'<a id="btnMassDelete" class="butAction" href="#" onclick="toggleMassDelete(); return false;" style="margin-left:20px;">Zeilen löschen</a>\');';
                echo '  }';
                echo '});</script>'."\n";

                // Sync-Buttons + Collapse-Buttons - rechts ausgerichtet
                echo '<script>$(document).ready(function() {';
                echo '  if ($(".sync-collapse-row").length === 0) {';
                echo '    var hasCollapse = $("tr.section-header").length > 0;';
                echo '    var buttons = \'<div class="sync-collapse-row" style="text-align:right; margin:5px 0;">\';';
                echo '    buttons += \'<a class="button" href="#" onclick="syncAllToFacturedet(); return false;" style="margin-left:5px;">\' + subtotalTitleLang.buttonToInvoice + \'</a>\';';
                echo '    buttons += \'<a class="button" href="#" onclick="removeAllFromFacturedet(); return false;" style="margin-left:5px;">\' + subtotalTitleLang.buttonFromInvoice + \'</a>\';';
                echo '    if (hasCollapse) {';
                echo '      buttons += \'<a class="button" href="#" onclick="expandAllSections(); return false;" style="margin-left:5px;">\' + subtotalTitleLang.buttonExpandAll + \'</a>\';';
                echo '      buttons += \'<a class="button" href="#" onclick="collapseAllSections(); return false;" style="margin-left:5px;">\' + subtotalTitleLang.buttonCollapseAll + \'</a>\';';
                echo '    }';
                echo '    buttons += \'</div>\';';
                echo '    $(".tabsAction").first().after(buttons);';
                echo '  }';
                echo '});</script>'."\n";
            }
        }
        
        return 0;
    }
    
    
    /**
     * Execute action
     */
    public function getNomUrl($parameters, &$object, &$action)
    {
        global $db, $langs, $conf, $user;
        $this->resprints = '';
        return 0;
    }
    
    /**
     * Overload the doActions function
     */
    public function doActions($parameters, &$object, &$action, $hookmanager)
    {
        return 0;
    }
    
    
    /**
     * Overload the doMassActions function
     */
    public function doMassActions($parameters, &$object, &$action, $hookmanager)
    {
        global $conf, $user, $langs;
        
        $error = 0;
        
        if (in_array($parameters['currentcontext'], array('somecontext1', 'somecontext2'))) {
            foreach ($parameters['toselect'] as $objectid) {
                // Do action on each object id
            }
            
            if (!$error) {
                $this->results = array('myreturn' => 999);
                $this->resprints = 'A text to show';
                return 0;
            } else {
                $this->errors[] = 'Error message';
                return -1;
            }
        }
        
        return 0;
    }
    
    
    /**
     * Overload the addMoreMassActions function
     */
    public function addMoreMassActions($parameters, &$object, &$action, $hookmanager)
    {
        global $conf, $user, $langs;
        
        $error = 0;
        $disabled = 1;
        
        if (in_array($parameters['currentcontext'], array('somecontext1', 'somecontext2'))) {
            $this->resprints = '<option value="0"'.($disabled ? ' disabled="disabled"' : '').'>'.$langs->trans("SubtotalTitleMassAction").'</option>';
        }
        
        if (!$error) {
            return 0;
        } else {
            $this->errors[] = 'Error message';
            return -1;
        }
    }
    
    
    /**
     * Execute action before PDF (document) creation
     */
    public function beforePDFCreation($parameters, &$object, &$action)
    {
        global $conf, $user, $langs;
        global $hookmanager;
        
        $outputlangs = $langs;
        
        $ret = 0;
        $deltemp = array();
        dol_syslog(get_class($this).'::executeHooks action='.$action);
        
        if (in_array($parameters['currentcontext'], array('somecontext1', 'somecontext2'))) {
            // do something only for the context 'somecontext1' or 'somecontext2'
        }
        
        return $ret;
    }
    
    /**
     * Execute action after PDF (document) creation
     */
    public function afterPDFCreation($parameters, &$pdfhandler, &$action)
    {
        global $conf, $user, $langs;
        global $hookmanager;
        
        $outputlangs = $langs;
        
        $ret = 0;
        $deltemp = array();
        dol_syslog(get_class($this).'::executeHooks action='.$action);
        
        if (in_array($parameters['currentcontext'], array('somecontext1', 'somecontext2'))) {
            // do something only for the context 'somecontext1' or 'somecontext2'
        }
        
        return $ret;
    }
    
    
    /**
     * Overload the loadDataForCustomReports function
     */
    public function loadDataForCustomReports($parameters, &$action, $hookmanager)
    {
        global $langs;
        
        $langs->load("subtotaltitle@subtotaltitle");
        
        $this->results = array();
        
        $head = array();
        $h = 0;
        
        if ($parameters['tabfamily'] == 'subtotaltitle') {
            $head[$h][0] = dol_buildpath('/module/index.php', 1);
            $head[$h][1] = $langs->trans("Home");
            $head[$h][2] = 'home';
            $h++;
            
            $this->results['title'] = $langs->trans("SubtotalTitle");
            $this->results['picto'] = 'subtotaltitle@subtotaltitle';
        }
        
        $head[$h][0] = 'customreports.php?objecttype='.$parameters['objecttype'].(empty($parameters['tabfamily']) ? '' : '&tabfamily='.$parameters['tabfamily']);
        $head[$h][1] = $langs->trans("CustomReports");
        $head[$h][2] = 'customreports';
        
        $this->results['head'] = $head;
        
        $arrayoftypes = array();
        
        $this->results['arrayoftype'] = $arrayoftypes;
        
        return 0;
    }
    
    
    /**
     * Overload the restrictedArea function
     */
    public function restrictedArea($parameters, $object, &$action, $hookmanager)
    {
        global $user;
        
        if ($parameters['features'] == 'myobject') {
            if ($user->hasRight('subtotaltitle', 'myobject', 'read')) {
                $this->results['result'] = 1;
                return 1;
            } else {
                $this->results['result'] = 0;
                return 1;
            }
        }
        
        return 0;
    }
    
    /**
     * Execute action completeTabsHead
     */
    public function completeTabsHead(&$parameters, &$object, &$action, $hookmanager)
    {
        global $langs, $conf, $user;
        
        if (!isset($parameters['object']->element)) {
            return 0;
        }
        if ($parameters['mode'] == 'remove') {
            return 0;
        } elseif ($parameters['mode'] == 'add') {
            $langs->load('subtotaltitle@subtotaltitle');
            $counter = count($parameters['head']);
            $element = $parameters['object']->element;
            $id = $parameters['object']->id;
            
            if (in_array($element, ['context1', 'context2'])) {
                $datacount = 0;
                
                $parameters['head'][$counter][0] = dol_buildpath('/subtotaltitle/subtotaltitle_tab.php', 1) . '?id=' . $id . '&amp;module='.$element;
                $parameters['head'][$counter][1] = $langs->trans('SubtotalTitleTab');
                if ($datacount > 0) {
                    $parameters['head'][$counter][1] .= '<span class="badge marginleftonlyshort">' . $datacount . '</span>';
                }
                $parameters['head'][$counter][2] = 'subtotaltitleemails';
                $counter++;
            }
            if ($counter > 0 && (int) DOL_VERSION < 14) {
                $this->results = $parameters['head'];
                return 1;
            } else {
                return 0;
            }
        } else {
            return -1;
        }
    }
    
    
    /**
     * Overload the showLinkToObjectBlock function
     */
    public function showLinkToObjectBlock($parameters, &$object, &$action, $hookmanager)
    {
        return 0;
    }
    
    /**
     * Hook: Wird aufgerufen wenn eine Rechnung geladen wird
     * Synchronisiert die Tabelle und rendert Section-Header
     */
    public function printObjectLine($parameters, &$object, &$action, $hookmanager)
    {
        global $db, $langs;

        // Erkenne Dokumenttyp
        $docType = DocumentTypeHelper::getTypeFromObject($object);
        if (!$docType) {
            return 0;
        }

        // Prüfe Context
        $expectedContext = DocumentTypeHelper::getContext($docType);
        if ($parameters['currentcontext'] != $expectedContext) {
            return 0;
        }

        $document_id = $object->id;

        // Setze Klassenvariablen für den aktuellen Dokumentkontext
        $this->currentDocType = $docType;
        $this->currentDocumentId = $document_id;

        // Prüfe ob Dokument bearbeitbar ist (nur im Entwurfsstatus)
        $this->isDraft = false;
        if (isset($object->statut)) {
            $this->isDraft = ($object->statut == 0);
            // Debug-Log
            $logFile = '/srv/http/dolibarr/documents/subtotaltitle/debug.log';
            error_log('['.date('Y-m-d H:i:s').'] printObjectLine - DocType: '.$this->currentDocType.', statut: '.$object->statut.', isDraft: '.($this->isDraft ? 'true' : 'false')."\n", 3, $logFile);
        } elseif (isset($object->status)) {
            $this->isDraft = ($object->status == 0);
            // Debug-Log
            $logFile = '/srv/http/dolibarr/documents/subtotaltitle/debug.log';
            error_log('['.date('Y-m-d H:i:s').'] printObjectLine - DocType: '.$this->currentDocType.', status: '.$object->status.', isDraft: '.($this->isDraft ? 'true' : 'false')."\n", 3, $logFile);
        }

        $line = $parameters['line'];

        if (!$line || !$line->id) {
            return 0;
        }

        // Prüfe ob diese Zeile eine unserer speziellen Zeilen ist (Section, Text, Subtotal)
        // special_code: 100=Section, 101=Text, 102=Subtotal
        if (isset($line->special_code) && in_array($line->special_code, array(100, 101, 102))) {
            // Diese Zeile ist eine unserer speziellen Zeilen - per JS ausblenden
            echo '<script>$(document).ready(function() { ';
            echo '  $("tr[id*=\''.$line->id.'\']").hide();';
            echo '});</script>';
            return 0;
        }

        // Dokument neu laden um aktuelle rang zu haben
        static $reloaded = array();
        $reload_key = $docType.'_'.$document_id;
        if (!isset($reloaded[$reload_key])) {
            $object->fetch($document_id);
            $object->fetch_thirdparty();
            $object->fetch_lines();
            $reloaded[$reload_key] = true;
        }

        // Synchronisiere Manager-Tabelle
        $this->syncManagerTable($document_id, $docType);

        // Rendere alle Sections die VOR dieser Zeile kommen sollten (inkl. leere!)
        $this->renderAllPendingSections($document_id, $line, $docType);
        
        // WICHTIG: Markiere diese Zeile mit line_order UND parent_section für JavaScript
        $tables = DocumentTypeHelper::getTableNames($docType);
        $sql = "SELECT line_order, parent_section FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " WHERE ".$tables['fk_line']." = ".(int)$line->id;
        $resql = $db->query($sql);
        if ($obj = $db->fetch_object($resql)) {
            $parentSection = $obj->parent_section ? $obj->parent_section : 'null';
            echo '<script>$(document).ready(function() { ';
            echo '  $("tr[id*=\''.$line->id.'\']").attr("data-line-order", '.$obj->line_order.');';
            echo '  $("tr[id*=\''.$line->id.'\']").attr("data-parent-section", "'.$parentSection.'");';
            echo '  $("tr[id*=\''.$line->id.'\']").attr("data-document-type", "'.$docType.'");';
            echo '});</script>';
        }

        return 0;
    }
    
    /**
     * Rendert ALLE Sections die VOR dieser RANG-Position kommen sollten
     */
    private function renderAllPendingSections($document_id, $line, $docType)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($docType);
        if (!$tables) return;

        static $last_rang = array();
        static $last_parent_section = array();

        $doc_key = $docType.'_'.$document_id;
        if (!isset(self::$rendered_sections[$doc_key])) {
            self::$rendered_sections[$doc_key] = array();
            $last_rang[$doc_key] = 0;
            $last_parent_section[$doc_key] = null;
        }

        // Hole rang dieser Produktzeile
        $sql = "SELECT rang FROM ".MAIN_DB_PREFIX.$tables['lines_table'];
        $sql .= " WHERE rowid = ".(int)$line->id;
        $resql = $db->query($sql);
        
        if (!$resql || $db->num_rows($resql) == 0) return;
        
        $current_rang = $db->fetch_object($resql)->rang;
        
        // Hole line_order und parent_section des aktuellen Produkts aus Manager-Tabelle
        $sql_current = "SELECT line_order, parent_section FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql_current .= " WHERE ".$tables['fk_line']." = ".(int)$line->id." AND document_type = '".$db->escape($docType)."'";
        $res_current = $db->query($sql_current);
        $current_line_order = 0;
        $current_parent_section = null;
        if ($obj_current = $db->fetch_object($res_current)) {
            $current_line_order = $obj_current->line_order;
            $current_parent_section = $obj_current->parent_section;
        }
        
        // Subtotal der VORHERIGEN Section rendern (wenn Section-Wechsel)
        if ($last_parent_section[$doc_key] && $last_parent_section[$doc_key] != $current_parent_section) {
            $sql_subtotal = "SELECT rowid, title, parent_section, line_order FROM ".MAIN_DB_PREFIX."facture_lines_manager";
            $sql_subtotal .= " WHERE ".$tables['fk_parent']." = ".(int)$document_id;
            $sql_subtotal .= " AND document_type = '".$db->escape($docType)."'";
            $sql_subtotal .= " AND parent_section = ".(int)$last_parent_section[$doc_key];
            $sql_subtotal .= " AND line_type = 'subtotal'";
            $resql_subtotal = $db->query($sql_subtotal);
            
            if ($obj_sub = $db->fetch_object($resql_subtotal)) {
                $subtotal_key = 'subtotal_'.$obj_sub->rowid;
                if (!in_array($subtotal_key, self::$rendered_sections[$doc_key])) {
                    echo $this->renderSubtotalLine($obj_sub);
                    self::$rendered_sections[$doc_key][] = $subtotal_key;
                    
                    if ($this->debug) {
                        error_log('[SubtotalTitle] ✅ Subtotal "'.$obj_sub->title.'" gerendert (Section-Wechsel)');
                    }
                }
            }
        }
        
        // Hole ALLE Sections ZWISCHEN letztem rang und aktuellem rang
        $sql = "SELECT DISTINCT s.rowid, s.title, s.show_subtotal, s.collapsed, s.line_order, s.in_facturedet,";
        $sql .= " (SELECT MIN(fd.rang) FROM ".MAIN_DB_PREFIX."facture_lines_manager m2";
        $sql .= "  INNER JOIN ".MAIN_DB_PREFIX.$tables['lines_table']." fd ON fd.rowid = m2.".$tables['fk_line'];
        $sql .= "  WHERE m2.parent_section = s.rowid AND m2.document_type = '".$db->escape($docType)."') as first_product_rang";
        $sql .= " FROM ".MAIN_DB_PREFIX."facture_lines_manager s";
        $sql .= $this->getDocumentWhere($document_id, $docType, 's');
        $sql .= " AND s.line_type = 'section'";
        $sql .= " HAVING first_product_rang > ".(int)$last_rang[$doc_key];
        $sql .= " AND first_product_rang <= ".(int)$current_rang;
        $sql .= " ORDER BY first_product_rang";
        $resql = $db->query($sql);
        
        while ($obj = $db->fetch_object($resql)) {
            if (!in_array($obj->rowid, self::$rendered_sections[$doc_key])) {
                $section = array(
                    'section_id' => $obj->rowid,
                    'title' => $obj->title,
                    'show_subtotal' => $obj->show_subtotal,
                    'collapsed' => $obj->collapsed,
                    'in_facturedet' => $obj->in_facturedet
                );
                echo $this->renderSectionHeader($section);
                self::$rendered_sections[$doc_key][] = $obj->rowid;
                
                if ($this->debug) {
                    error_log('[SubtotalTitle] ✅ Section "'.$obj->title.'" gerendert vor rang '.$current_rang);
                }
            }
        }
        
        // Rendere Textzeilen die VOR dieser Produktzeile kommen
        $sql_text = "SELECT rowid, title, line_order, in_facturedet FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql_text .= $this->getDocumentWhere($document_id, $docType);
        $sql_text .= " AND line_type = 'text'";
        $sql_text .= " AND line_order < ".(int)$current_line_order;
        $sql_text .= " ORDER BY line_order";
        $resql_text = $db->query($sql_text);

        if ($resql_text) {
            while ($obj_text = $db->fetch_object($resql_text)) {
                $text_key = 'text_'.$obj_text->rowid;
                if (!in_array($text_key, self::$rendered_sections[$doc_key])) {
                    $textline = array(
                        'id' => $obj_text->rowid,
                        'title' => $obj_text->title,
                        'line_order' => $obj_text->line_order,
                        'in_facturedet' => $obj_text->in_facturedet
                    );
                    echo $this->renderTextLine($textline);
                    self::$rendered_sections[$doc_key][] = $text_key;

                    if ($this->debug) {
                        error_log('[SubtotalTitle] ✅ Textzeile "'.$obj_text->title.'" gerendert');
                    }
                }
            }
        }

        // Merke für nächsten Durchlauf
        $last_rang[$doc_key] = $current_rang;
        $last_parent_section[$doc_key] = $current_parent_section;
    }
    
    /**
     * Rendert eine Textzeile
     */
    private function renderTextLine($textline)
    {
        global $db;
        
        // In-Facturedet Status
        $in_facturedet = isset($textline['in_facturedet']) ? $textline['in_facturedet'] : 0;
        $sync_checked = $in_facturedet ? 'checked' : '';
        $in_class = $in_facturedet ? ' in-facturedet' : '';
        
        $html = '<tr class="textline-row drag'.$in_class.'" data-textline-id="'.$textline['id'].'" data-line-order="'.$textline['line_order'].'">';
        
        // Inhalt (colspan=10)
        $html .= '<td colspan="10" style="padding:8px; font-weight:bold;">';
        $html .= htmlspecialchars($textline['title']);

        // Sync-Checkbox (NEU!) - nur im Entwurfsstatus
        if ($this->isDraft) {
            $html .= ' <label style="margin-left:15px;font-weight:normal;font-size:12px;" title="In Rechnung/PDF anzeigen">';
            $html .= '<input type="checkbox" class="sync-checkbox" data-line-id="'.$textline['id'].'" data-line-type="text" '.$sync_checked.' onclick="toggleFacturedetSync('.$textline['id'].', \'text\', this);">';
            $html .= ' 📄</label>';
        }

        $html .= '</td>';

        // Edit (Spalte 11) - nur im Entwurfsstatus
        $html .= '<td class="linecoledit center">';
        if ($this->isDraft) {
            $html .= '<a href="#" onclick="editTextLine('.$textline['id'].', \''.addslashes($textline['title']).'\'); return false;" title="Bearbeiten">';
            $html .= '<span class="fas fa-pencil-alt" style="color:#444;" title="Ändern"></span></a>';
        }
        $html .= '</td>';

        // Delete (Spalte 12) - nur im Entwurfsstatus
        $html .= '<td class="linecoldelete center">';
        if ($this->isDraft) {
            $html .= '<a href="#" onclick="deleteTextLine('.$textline['id'].'); return false;" title="Löschen">';
            $html .= '<span class="fas fa-trash pictodelete" title="Löschen"></span></a>';
        }
        $html .= '</td>';
        
        // Move (Spalte 13)
        $html .= '<td class="linecolmove tdlineupdown center"></td>';
        
        // Unlink (Spalte 14)
        $html .= '<td class="linecolunlink"></td>';
        
        $html .= '</tr>';
        
        return $html;
    }
    
    /**
     * Rendert eine Subtotal-Zeile
     */
    private function renderSubtotalLine($subtotal)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($this->currentDocType);
        if (!$tables) return '';

        // Hole in_facturedet Status
        $sql_sync = "SELECT in_facturedet FROM ".MAIN_DB_PREFIX."facture_lines_manager WHERE rowid = ".(int)$subtotal->rowid;
        $res_sync = $db->query($sql_sync);
        $obj_sync = $db->fetch_object($res_sync);
        $in_facturedet = $obj_sync ? $obj_sync->in_facturedet : 0;
        $sync_checked = $in_facturedet ? 'checked' : '';
        $in_class = $in_facturedet ? ' in-facturedet' : '';

        // Berechne aktuelle Summe
        $sql = "SELECT SUM(d.total_ht) as total";
        $sql .= " FROM ".MAIN_DB_PREFIX."facture_lines_manager m";
        $sql .= " INNER JOIN ".MAIN_DB_PREFIX.$tables['lines_table']." d ON d.rowid = m.".$tables['fk_line'];
        $sql .= " WHERE m.parent_section = ".(int)$subtotal->parent_section;
        $sql .= " AND m.".$tables['fk_parent']." = ".(int)$this->currentDocumentId;
        $sql .= " AND m.document_type = '".$db->escape($this->currentDocType)."'";
        $sql .= " AND m.line_type = 'product'";
        $resql = $db->query($sql);
        $sum = 0;
        if ($resql && ($obj = $db->fetch_object($resql))) {
            $sum = $obj->total ? $obj->total : 0;
        }
        
        $formatted = number_format($sum, 2, ',', '.');
        
        $html = '<tr class="subtotal-row'.$in_class.'" data-section-id="'.$subtotal->parent_section.'" data-subtotal-id="'.$subtotal->rowid.'" data-line-order="'.$subtotal->line_order.'" style="font-weight:bold;">';
        $html .= '<td colspan="9" style="text-align:right; padding:8px;">';
        $html .= 'Zwischensumme:';

        // Sync-Checkbox (NEU!) - nur im Entwurfsstatus
        if ($this->isDraft) {
            $html .= ' <label style="font-weight:normal;font-size:12px;margin-left:10px;" title="In Rechnung/PDF anzeigen">';
            $html .= '<input type="checkbox" class="sync-checkbox" data-line-id="'.$subtotal->rowid.'" data-line-type="subtotal" '.$sync_checked.' onclick="toggleFacturedetSync('.$subtotal->rowid.', \'subtotal\', this);">';
            $html .= ' 📄</label>';
        }

        $html .= '</td>';
        $html .= '<td class="linecolht right" style="padding:8px;">'.$formatted.'</td>';
        $html .= '<td class="linecoledit"></td>';
        $html .= '<td class="linecoldelete"></td>';
        $html .= '<td class="linecolmove"></td>';
        $html .= '<td class="linecolunlink"></td>';
        $html .= '</tr>';
        
        return $html;
    }
    
    /**
     * Hook: Wird aufgerufen wenn das Produkt-Hinzufügen-Formular gerendert wird
     * Fügt Section-Dropdown hinzu
     */
    public function formAddObjectLine($parameters, &$object, &$action, $hookmanager)
    {
        global $db;

        // Erkenne Dokumenttyp
        $docType = DocumentTypeHelper::getTypeFromObject($object);
        if (!$docType) {
            return 0;
        }

        // Prüfe Context
        $expectedContext = DocumentTypeHelper::getContext($docType);
        if ($parameters['currentcontext'] != $expectedContext) {
            return 0;
        }

        $document_id = $object->id;

        echo $this->renderSectionDropdown($document_id, $docType);

        return 0;
    }
    
    /**
     * Synchronisiert llx_facture_lines_manager mit vorhandenen Zeilen
     */
    private function syncManagerTable($document_id, $docType)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($docType);
        if (!$tables) return;

        // 1. CLEANUP: Lösche verwaiste Einträge
        $sql_cleanup = "DELETE m FROM ".MAIN_DB_PREFIX."facture_lines_manager m";
        $sql_cleanup .= " LEFT JOIN ".MAIN_DB_PREFIX.$tables['lines_table']." d ON m.".$tables['fk_line']." = d.rowid";
        $sql_cleanup .= " WHERE m.".$tables['fk_parent']." = ".(int)$document_id;
        $sql_cleanup .= " AND m.line_type = 'product'";
        $sql_cleanup .= " AND d.rowid IS NULL";
        $result = $db->query($sql_cleanup);

        // 2. Hole alle Produktzeilen des Dokuments
        $sql = "SELECT rowid FROM ".MAIN_DB_PREFIX.$tables['lines_table'];
        $sql .= " WHERE ".$tables['fk_parent']." = ".(int)$document_id;
        $sql .= " ORDER BY rang";
        $resql = $db->query($sql);

        while ($obj = $db->fetch_object($resql)) {
            $sql_check = "SELECT rowid FROM ".MAIN_DB_PREFIX."facture_lines_manager";
            $sql_check .= " WHERE ".$tables['fk_line']." = ".(int)$obj->rowid;
            $resql_check = $db->query($sql_check);

            if ($db->num_rows($resql_check) == 0) {
                $next_order = $this->getNextLineOrder($document_id, $docType);

                // Setze alle FK-Felder explizit (NULL für nicht genutzte)
                $fk_facture = ($docType === 'invoice') ? (int)$document_id : 'NULL';
                $fk_propal = ($docType === 'propal') ? (int)$document_id : 'NULL';
                $fk_commande = ($docType === 'order') ? (int)$document_id : 'NULL';

                $sql_ins = "INSERT INTO ".MAIN_DB_PREFIX."facture_lines_manager";
                $sql_ins .= " (fk_facture, fk_propal, fk_commande, document_type, line_type, ".$tables['fk_line'].", line_order, date_creation)";
                $sql_ins .= " VALUES (".$fk_facture.", ".$fk_propal.", ".$fk_commande.", '".$db->escape($docType)."', 'product', ".(int)$obj->rowid.", ".$next_order.", NOW())";
                $db->query($sql_ins);
            }
        }
    }
    
    /**
     * Holt die Section für eine Produktzeile
     */
    private function getSectionForLine($line_id)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($this->currentDocType);
        if (!$tables) return null;

        $sql = "SELECT m.parent_section as section_id, s.title, s.show_subtotal, s.collapsed";
        $sql .= " FROM ".MAIN_DB_PREFIX."facture_lines_manager m";
        $sql .= " LEFT JOIN ".MAIN_DB_PREFIX."facture_lines_manager s ON s.rowid = m.parent_section";
        $sql .= " WHERE m.".$tables['fk_line']." = ".(int)$line_id;
        $sql .= " AND m.document_type = '".$db->escape($this->currentDocType)."'";
        $sql .= " AND m.line_type = 'product'";

        $resql = $db->query($sql);
        
        if ($obj = $db->fetch_object($resql)) {
            if ($obj->section_id) {
                return array(
                    'section_id' => $obj->section_id,
                    'title' => $obj->title,
                    'show_subtotal' => $obj->show_subtotal,
                    'collapsed' => $obj->collapsed
                );
            }
        }
        
        return null;
    }
    
    /**
     * Prüft ob dies die erste Zeile einer Section ist
     */
    private function isFirstLineInSection($line_id, $section_id)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($this->currentDocType);
        if (!$tables) return false;

        $sql = "SELECT line_order FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " WHERE ".$tables['fk_line']." = ".(int)$line_id;
        $sql .= " AND document_type = '".$db->escape($this->currentDocType)."'";
        $resql = $db->query($sql);
        if (!$resql || !($obj = $db->fetch_object($resql))) {
            return false;
        }
        $current_order = $obj->line_order;

        $sql = "SELECT MIN(line_order) as min_order";
        $sql .= " FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " WHERE parent_section = ".(int)$section_id;
        $sql .= " AND line_type = 'product'";
        $resql = $db->query($sql);
        if (!$resql || !($obj = $db->fetch_object($resql))) {
            return false;
        }

        return ($current_order == $obj->min_order);
    }
    
    /**
     * Rendert einen Section-Header
     */
    private function renderSectionHeader($section)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($this->currentDocType);
        if (!$tables) return '';

        // Hole line_order und in_facturedet der Section
        $sql = "SELECT line_order, in_facturedet FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " WHERE rowid = ".(int)$section['section_id'];
        $resql = $db->query($sql);
        $line_order = 0;
        $in_facturedet = 0;
        if ($obj = $db->fetch_object($resql)) {
            $line_order = $obj->line_order;
            $in_facturedet = $obj->in_facturedet;
        }

        $sync_checked = $in_facturedet ? 'checked' : '';
        $in_class = $in_facturedet ? ' in-facturedet' : '';

        // Hole Produkte dieser Section (IDs + Anzahl)
        $sql_products = "SELECT ".$tables['fk_line']." FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql_products .= " WHERE parent_section = ".(int)$section['section_id'];
        $sql_products .= " AND ".$tables['fk_parent']." = ".(int)$this->currentDocumentId;
        $sql_products .= " AND document_type = '".$db->escape($this->currentDocType)."'";
        $sql_products .= " AND line_type = 'product'";
        $res_products = $db->query($sql_products);

        $product_ids = [];
        while ($obj_prod = $db->fetch_object($res_products)) {
            $fk_line_col = $tables['fk_line'];
            $product_ids[] = (int)$obj_prod->$fk_line_col;
        }
        $product_count = count($product_ids);
        $product_ids_json = htmlspecialchars(json_encode($product_ids));
        
        $html = '<tr class="section-header'.$in_class.'" data-section-id="'.$section['section_id'].'" data-section-title="'.htmlspecialchars($section['title']).'" data-line-order="'.$line_order.'" data-product-count="'.$product_count.'" data-product-ids="'.$product_ids_json.'">';
        
        // Titel (colspan=10)
        $html .= '<td colspan="6" style="font-weight:bold; padding:8px;">';
        $html .= '<span class="section-toggle" onclick="toggleSection('.$section['section_id'].'); event.stopPropagation();">▼</span>';
        $html .= htmlspecialchars($section['title']);
        $html .= '<span class="section-count">'.$product_count.' Produkte</span></td><td colspan="2" align="right">';


        // Zwischensummen-Checkbox - nur im Entwurfsstatus
        if ($this->isDraft) {
            $checked = $section['show_subtotal'] ? 'checked' : '';
            $html .= ' <label style="margin-left:15px;font-weight:normal;font-size:12px;" onclick="event.stopPropagation();">';
            $html .= '<input type="checkbox" class="subtotal-toggle" data-section-id="'.$section['section_id'].'" '.$checked.' onclick="event.stopPropagation(); toggleSubtotal('.$section['section_id'].', this);">';
            $html .= ' <b>€</b></label>';

            // Sync-Checkbox (NEU!)
            $html .= ' <label style="margin-left:15px;font-weight:normal;font-size:12px;" onclick="event.stopPropagation();" title="In Rechnung/PDF anzeigen">';
            $html .= '<input type="checkbox" class="sync-checkbox" data-line-id="'.$section['section_id'].'" data-line-type="section" '.$sync_checked.' onclick="event.stopPropagation(); toggleFacturedetSync('.$section['section_id'].', \'section\', this);">';
            $html .= ' 📄</label>';
        }
        $html .= '</td><td colspan="2" align="right">';

        // Move-Buttons - nur im Entwurfsstatus
        if ($this->isDraft) {
            $html .= ' <a href="#" onclick="moveSection('.$section['section_id'].', \'up\'); return false;" title="Nach oben"><span class="fa fa-long-arrow-alt-up"></span></a>';
            $html .= ' <a href="#" onclick="moveSection('.$section['section_id'].', \'down\'); return false;" title="Nach unten"><span class="fa fa-long-arrow-alt-down"></span></a>';
        }
        $html .= '</td>';

        // Edit (Spalte 11) - nur im Entwurfsstatus
        $html .= '<td class="linecoledit center">';
        if ($this->isDraft) {
            $html .= '<a href="#" onclick="renameSection('.$section['section_id'].', \''.addslashes($section['title']).'\'); return false;" title="Umbenennen">';
            $html .= '<span class="fas fa-pencil-alt" style="color:#444;" title="Ändern"></span></a>';
        }
        $html .= '</td>';

        // Delete (Spalte 12) - nur im Entwurfsstatus
        $html .= '<td class="linecoldelete center">';
        if ($this->isDraft) {
            if ($product_count == 0) {
                $html .= '<a href="#" onclick="deleteSection('.$section['section_id'].'); return false;" title="Leere Gruppe löschen">';
                $html .= '<span class="fas fa-trash pictodelete" title="Löschen"></span></a>';
            } else {
                $html .= '<a href="#" onclick="deleteSectionForce('.$section['section_id'].'); return false;" title="⚠️ Gruppe MIT '.$product_count.' Produkten löschen">';
                $html .= '<span class="fas fa-trash" style="color:#c00;" title="Alles löschen"></span></a>';
            }
        }
        $html .= '</td>';
        
        // Move (Spalte 13)
        $html .= '<td class="linecolmove center"></td>';
        
        // Unlink (Spalte 14)
        $html .= '<td class="linecolunlink"></td>';
        
        $html .= '</tr>';
        
        return $html;
    }
    
    /**
     * Rendert Section-Dropdown im Add-Product-Formular
     */
    private function renderSectionDropdown($document_id, $docType)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($docType);
        if (!$tables) return '';

        $sql = "SELECT rowid, title FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " WHERE ".$tables['fk_parent']." = ".(int)$document_id;
        $sql .= " AND document_type = '".$db->escape($docType)."'";
        $sql .= " AND line_type = 'section'";
        $sql .= " ORDER BY line_order";
        $resql = $db->query($sql);

        $html = '<script>';
        $html .= '$(document).ready(function() {';

        // Debug: Zeige Anzahl gefundener Sections
        $num_sections = $resql ? $db->num_rows($resql) : 0;
        $html .= '  console.log("[SubtotalTitle] Gefundene Produktgruppen: '.$num_sections.'");';
        $html .= '  console.log("[SubtotalTitle] Dokumenttyp: '.$docType.'");';
        $html .= '  console.log("[SubtotalTitle] Dokument ID: '.$document_id.'");';

        $html .= '  var dropdown = \'<tr><td colspan="13">Produktgruppe: <select name="section_id_dropdown" id="section_id_dropdown" style="margin-left:5px;">\';';
        $html .= '  dropdown += \'<option value="">-- Keine Produktgruppe --</option>\';';

        if ($resql) {
            while ($obj = $db->fetch_object($resql)) {
                $safe_title = str_replace(array("'", '"', "\n", "\r"), array("\\'", '&quot;', ' ', ' '), $obj->title);
                $html .= '  console.log("[SubtotalTitle] Section gefunden: '.$obj->rowid.' - '.$safe_title.'");';
                $html .= '  dropdown += \'<option value="'.$obj->rowid.'">'.addslashes($obj->title).'</option>\';';
            }
        } else {
            $safe_error = str_replace(array("'", '"'), array("\\'", '&quot;'), $db->lasterror());
            $html .= '  console.error("[SubtotalTitle] SQL Error: '.$safe_error.'");';
        }

        $html .= '  dropdown += \'</select></td></tr>\';';
        $html .= '  $(\'#addproduct tr:last\').before(dropdown);';
        
        $html .= '  $(\'form[name="addproduct"]\').append(\'<input type="hidden" name="section_id" id="section_id" value="">\');';
        
        $html .= '  $(document).on(\'change\', \'#section_id_dropdown\', function() {';
        $html .= '    var val = $(this).val();';
        $html .= '    console.log(\'Section selected:\', val);';
        $html .= '    $(\'#section_id\').val(val);';
        $html .= '  });';
        
        $html .= '});';
        $html .= '</script>';
        
        return $html;
    }
    
    /**
     * Fügt ein Produkt zu einer Section hinzu
     */
    private function addProductToSection($doc_key, $line_id, $section_id)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($this->currentDocType);
        if (!$tables) return;

        if ($this->debug) {
            error_log('[SubtotalTitle] 🔴 addProductToSection: doc='.$doc_key.', line='.$line_id.', section='.$section_id);
        }

        $sql_check = "SELECT rowid, line_order FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql_check .= " WHERE ".$tables['fk_line']." = ".(int)$line_id;
        $sql_check .= " AND document_type = '".$db->escape($this->currentDocType)."'";
        $resql_check = $db->query($sql_check);

        if ($db->num_rows($resql_check) > 0) {
            $obj = $db->fetch_object($resql_check);

            $sql_upd = "UPDATE ".MAIN_DB_PREFIX."facture_lines_manager";
            $sql_upd .= " SET parent_section = ".(int)$section_id;
            $sql_upd .= " WHERE rowid = ".(int)$obj->rowid;
            $db->query($sql_upd);

            $this->reorderLines($doc_key);

        } else {
            $sql = "SELECT line_order FROM ".MAIN_DB_PREFIX."facture_lines_manager";
            $sql .= " WHERE rowid = ".(int)$section_id;
            $resql = $db->query($sql);
            if (!$resql || !($obj = $db->fetch_object($resql))) {
                return;
            }
            $section_order = $obj->line_order;

            $new_order = $section_order + 1;

            $sql = "UPDATE ".MAIN_DB_PREFIX."facture_lines_manager";
            $sql .= " SET line_order = line_order + 1";
            $sql .= " WHERE ".$tables['fk_parent']." = ".(int)$doc_key;
            $sql .= " AND document_type = '".$db->escape($this->currentDocType)."'";
            $sql .= " AND line_order >= ".$new_order;
            $db->query($sql);

            $sql = "INSERT INTO ".MAIN_DB_PREFIX."facture_lines_manager";
            $sql .= " (".$tables['fk_parent'].", document_type, line_type, ".$tables['fk_line'].", parent_section, line_order, date_creation)";
            $sql .= " VALUES (".(int)$doc_key.", '".$db->escape($this->currentDocType)."', 'product', ".(int)$line_id.", ".(int)$section_id.", ".$new_order.", NOW())";
            $db->query($sql);
        }
    }
    
    /**
     * Fügt ein freies Produkt hinzu
     */
    private function addFreeProduct($doc_key, $line_id)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($this->currentDocType);
        if (!$tables) return;

        if ($this->debug) {
            error_log('[SubtotalTitle] 🟢 addFreeProduct: doc='.$doc_key.', line='.$line_id.' (parent_section=NULL)');
        }

        $next_order = $this->getNextLineOrder($doc_key, $this->currentDocType);

        $sql = "INSERT INTO ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " (".$tables['fk_parent'].", document_type, line_type, ".$tables['fk_line'].", line_order, date_creation)";
        $sql .= " VALUES (".(int)$doc_key.", '".$db->escape($this->currentDocType)."', 'product', ".(int)$line_id.", ".$next_order.", NOW())";
        $db->query($sql);
    }
    
    /**
     * Synchronisiert lines_table.rang aus line_order
     */
    private function syncRangFromManager($doc_key)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($this->currentDocType);
        if (!$tables) return;

        $sql = "SELECT ".$tables['fk_line'].", line_order";
        $sql .= " FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " WHERE ".$tables['fk_parent']." = ".(int)$doc_key;
        $sql .= " AND document_type = '".$db->escape($this->currentDocType)."'";
        $sql .= " AND line_type = 'product'";
        $sql .= " ORDER BY line_order";
        $resql = $db->query($sql);

        $rang = 1;
        $fk_line_col = $tables['fk_line'];
        while ($obj = $db->fetch_object($resql)) {
            $sql_upd = "UPDATE ".MAIN_DB_PREFIX.$tables['lines_table'];
            $sql_upd .= " SET rang = ".$rang;
            $sql_upd .= " WHERE rowid = ".(int)$obj->$fk_line_col;
            $db->query($sql_upd);
            $rang++;
        }
    }
    
    /**
     * Holt die nächste freie line_order
     */
    private function getNextLineOrder($document_id, $docType)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($docType);
        $sql = "SELECT MAX(line_order) as max_order";
        $sql .= " FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= $this->getDocumentWhere($document_id, $docType);
        $resql = $db->query($sql);
        if (!$resql || !($obj = $db->fetch_object($resql))) {
            return 1;
        }

        return ($obj->max_order ? $obj->max_order + 1 : 1);
    }
    
    /**
     * Holt die rowid der letzten Produktzeile
     */
    private function getLastProductLine($doc_key)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($this->currentDocType);
        if (!$tables) return 0;

        $fk_line_col = $tables['fk_line'];
        $sql = "SELECT m.".$fk_line_col;
        $sql .= " FROM ".MAIN_DB_PREFIX."facture_lines_manager m";
        $sql .= " WHERE m.".$tables['fk_parent']." = ".(int)$doc_key;
        $sql .= " AND m.document_type = '".$db->escape($this->currentDocType)."'";
        $sql .= " AND m.line_type = 'product'";
        $sql .= " ORDER BY m.line_order DESC";
        $sql .= " LIMIT 1";
        $resql = $db->query($sql);

        if ($obj = $db->fetch_object($resql)) {
            return $obj->$fk_line_col;
        }

        return 0;
    }
    
    /**
     * Holt alle Sections die keine Produkte haben
     */
    private function getEmptySections($doc_key)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($this->currentDocType);
        if (!$tables) return array();

        $sql = "SELECT s.rowid as section_id, s.title, s.show_subtotal, s.collapsed";
        $sql .= " FROM ".MAIN_DB_PREFIX."facture_lines_manager s";
        $sql .= " WHERE s.".$tables['fk_parent']." = ".(int)$doc_key;
        $sql .= " AND s.document_type = '".$db->escape($this->currentDocType)."'";
        $sql .= " AND s.line_type = 'section'";
        $sql .= " AND NOT EXISTS (";
        $sql .= "   SELECT 1 FROM ".MAIN_DB_PREFIX."facture_lines_manager p";
        $sql .= "   WHERE p.parent_section = s.rowid";
        $sql .= "   AND p.".$tables['fk_parent']." = ".(int)$doc_key;
        $sql .= "   AND p.document_type = '".$db->escape($this->currentDocType)."'";
        $sql .= " )";
        $sql .= " ORDER BY s.line_order";
        $resql = $db->query($sql);
        
        $sections = array();
        while ($obj = $db->fetch_object($resql)) {
            $sections[] = array(
                'section_id' => $obj->section_id,
                'title' => $obj->title,
                'show_subtotal' => $obj->show_subtotal,
                'collapsed' => $obj->collapsed
            );
        }
        
        return $sections;
    }
    
    /**
     * Sortiert alle Zeilen neu: Schließt nur Lücken, behält Reihenfolge bei
     */
    private function reorderLines($doc_key)
    {
        global $db;

        $tables = DocumentTypeHelper::getTableNames($this->currentDocType);
        if (!$tables) return;

        $sql = "SELECT rowid FROM ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " WHERE ".$tables['fk_parent']." = ".(int)$doc_key;
        $sql .= " AND document_type = '".$db->escape($this->currentDocType)."'";
        $sql .= " ORDER BY line_order";
        $resql = $db->query($sql);
        
        $new_order = 1;
        while ($obj = $db->fetch_object($resql)) {
            $sql_upd = "UPDATE ".MAIN_DB_PREFIX."facture_lines_manager";
            $sql_upd .= " SET line_order = ".$new_order;
            $sql_upd .= " WHERE rowid = ".(int)$obj->rowid;
            $db->query($sql_upd);
            $new_order++;
        }
    }
}