// DEBUG FLAG - true für Debug-Ausgaben, false für Produktiv
var SUBTOTAL_DEBUG = true;

function debugLog(message) {
    if (SUBTOTAL_DEBUG) {
        console.log(message);
    }
}

// Flag: Wird gerade gezogen?
var isDragging = false;
var isTogglingSubtotal = false;

// Nur einmal laden!
if (typeof SubtotalTitleLoaded === 'undefined') {
    SubtotalTitleLoaded = true;

    $(document).ready(function() {
        debugLog('✅ SubtotalTitle JS loaded!');

        // Füge Button zu den Standard-Buttons hinzu - NUR im Entwurfsstatus
        if ($('#tablelines').length > 0) {
            var factureId = getFactureId();

            // Prüfe ob Dokument im Entwurfsstatus ist
            if (typeof subtotalTitleIsDraft !== 'undefined' && subtotalTitleIsDraft === true) {
                var createBtn = '<a class="butAction" href="#" onclick="createNewSection(); return false;">' + (typeof subtotalTitleLang !== 'undefined' ? subtotalTitleLang.sectionCreate || 'Section erstellen' : 'Section erstellen') + '</a>';

                if ($('.tabsAction').length > 0) {
                    $('.tabsAction').prepend(createBtn);
                    debugLog('✅ Section-Button hinzugefügt');
                }
            } else {
                debugLog('⚠️ Dokument nicht im Entwurfsstatus - Button wird nicht angezeigt');
            }

            // ⬇️ HIER FEHLTE DER AUFRUF! ⬇️
            initDragAndDrop();
        }
    });
}

/**
 * Holt die Dokument-ID und Typ aus der URL
 */
function getDocumentInfo() {
    var url = window.location.href;
    var match = url.match(/[?&]id=(\d+)/);
    var id = match ? match[1] : null;

    // Erkenne Dokumenttyp anhand der URL
    var docType = 'invoice'; // Default
    if (url.indexOf('/comm/propal/') !== -1) {
        docType = 'propal';
    } else if (url.indexOf('/commande/') !== -1) {
        docType = 'order';
    }

    return { id: id, type: docType };
}

/**
 * DEPRECATED: Verwende getDocumentInfo() stattdessen
 */
function getFactureId() {
    return getDocumentInfo().id;
}

/**
 * Erstellt eine neue Section
 */
function createNewSection() {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    var title = prompt(lang.sectionName || 'Neue Positionsgruppe - Name eingeben:');
    if (!title) return;

    var docInfo = getDocumentInfo();
    if (!docInfo.id) {
        alert(lang.errorLoadingSections || 'Fehler: Keine Dokument-ID gefunden');
        return;
    }

    debugLog('Erstelle Section: ' + title + ' für ' + docInfo.type + ' ID ' + docInfo.id);

    $.post('/dolibarr/custom/subtotaltitle/ajax/create_section.php', {
        facture_id: docInfo.id,
        document_type: docInfo.type,
        title: title
    }, function(response) {
        debugLog('Section erstellt: ' + JSON.stringify(response));
        if (response.success) {
            window.location.href = window.location.pathname + window.location.search;
        } else {
            alert((lang.errorSavingSection || 'Fehler') + ': ' + (response.error || 'Unbekannter Fehler'));
        }
    }, 'json').fail(function(xhr, status, error) {
        debugLog('AJAX Fehler: ' + status + ' ' + error);
        alert((lang.errorSavingSection || 'Fehler beim Erstellen') + ': ' + error);
    });
}

/**
 * Verschiebt eine Section nach oben/unten
 */
function moveSection(sectionId, direction) {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    debugLog('🔄 Verschiebe Section ' + sectionId + ' ' + direction);

    $.post('/dolibarr/custom/subtotaltitle/ajax/move_section.php', {
        section_id: sectionId,
        direction: direction
    }, function(response) {
        debugLog('Move response: ' + JSON.stringify(response));
        if (response.success) {
            window.location.href = window.location.pathname + window.location.search;
        } else {
            alert((lang.errorReordering || 'Fehler') + ': ' + (response.error || 'Unbekannter Fehler'));
        }
    }, 'json').fail(function(xhr, status, error) {
        if (SUBTOTAL_DEBUG) {
            console.error('AJAX Fehler: ' + status);
            console.error('Response Text: ' + xhr.responseText);
            console.error('Error:', error);
        }
        alert((lang.errorReordering || 'Fehler beim Verschieben') + (SUBTOTAL_DEBUG ? '. Siehe Console (F12) für Details.' : '.'));
    });
}

/**
 * Section umbenennen
 */
function renameSection(sectionId, currentTitle) {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    var newTitle = prompt(lang.sectionName || 'Positionsgruppe umbenennen:', currentTitle);
    if (!newTitle) return;

    debugLog('✏️ Benenne Section ' + sectionId + ' um zu: ' + newTitle);

    $.post('/dolibarr/custom/subtotaltitle/ajax/rename_section.php', {
        section_id: sectionId,
        title: newTitle
    }, function(response) {
        debugLog('Rename response: ' + JSON.stringify(response));
        if (response.success) {
            window.location.href = window.location.pathname + window.location.search;
        } else {
            alert((lang.errorSavingSection || 'Fehler') + ': ' + (response.error || 'Unbekannter Fehler'));
        }
    }, 'json').fail(function(xhr, status, error) {
        debugLog('AJAX Fehler: ' + status + ' ' + error);
        alert((lang.errorSavingSection || 'Fehler beim Umbenennen') + ': ' + error);
    });
}

/**
 * Löscht eine leere Section
 */
function deleteSection(sectionId) {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    if (!confirm(lang.confirmDeleteSection || 'Leere Positionsgruppe löschen?')) {
        return;
    }

    debugLog('🗑️ Lösche leere Section ' + sectionId);

    $.post('/dolibarr/custom/subtotaltitle/ajax/delete_section.php', {
        section_id: sectionId,
        force: 0  // Nur leere löschen
    }, function(response) {
        debugLog('Delete response: ' + JSON.stringify(response));
        if (response.success) {
            window.location.href = window.location.pathname + window.location.search;
        } else {
            alert((lang.errorDeletingSection || 'Fehler') + ': ' + (response.error || 'Unbekannter Fehler'));
        }
    }, 'json').fail(function(xhr, status, error) {
        debugLog('AJAX Fehler: ' + status + ' ' + error);
        alert((lang.errorDeletingSection || 'Fehler beim Löschen') + ': ' + error);
    });
}

/**
 * Löscht eine Section MIT allen Produkten (Force-Delete)
 */
function deleteSectionForce(sectionId) {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    var $row = $('tr.section-header[data-section-id="' + sectionId + '"]');
    var productCount = $row.data('product-count');
    var productIds = $row.data('product-ids') || [];

    var msg1 = (lang.confirmDeleteSectionForce || '⚠️ ACHTUNG!\n\nWollen Sie wirklich die Positionsgruppe\nUND alle %s enthaltenen Produkte löschen?\n\nDiese Aktion kann nicht rückgängig gemacht werden!').replace('%s', productCount);
    if (!confirm(msg1)) {
        return;
    }

    var msg2 = (lang.confirmDeleteSectionForce2 || 'Sind Sie WIRKLICH sicher?\n\n%s Produkte werden unwiderruflich gelöscht!').replace('%s', productCount);
    if (!confirm(msg2)) {
        return;
    }

    debugLog('🔴 Force-Delete Section ' + sectionId + ' mit Produkten: ' + JSON.stringify(productIds));

    $.post('/dolibarr/custom/subtotaltitle/ajax/delete_section.php', {
        section_id: sectionId,
        force: 1,
        product_ids: JSON.stringify(productIds)
    }, function(response) {
        debugLog('Force-Delete response: ' + JSON.stringify(response));
        if (response.success) {
            window.location.href = window.location.pathname + window.location.search;
        } else {
            alert((lang.errorDeletingSection || 'Fehler') + ': ' + (response.error || 'Unbekannter Fehler'));
        }
    }, 'json').fail(function(xhr, status, error) {
        debugLog('AJAX Fehler: ' + status + ' ' + error);
        alert((lang.errorDeletingSection || 'Fehler beim Löschen') + ': ' + error);
    });
}
/**
 * Fügt leere Sections an die richtige Stelle in der Tabelle ein
 */
function insertEmptySections() {
    var docInfo = getDocumentInfo();
    if (!docInfo.id) return;

    debugLog('📦 Lade alle Sections für ' + docInfo.type + ' ID ' + docInfo.id);

    $.get('/dolibarr/custom/subtotaltitle/ajax/get_sections.php', {
        facture_id: docInfo.id,
        document_type: docInfo.type
    }, function(response) {
        if (!response.success) return;

        debugLog('Gefundene Sections: ' + response.sections.length);

        // Filtere nur leere Sections
        var emptySections = response.sections.filter(function(s) { return s.is_empty; });

        debugLog('Leere Sections: ' + emptySections.length);

        // Füge jede leere Section an die richtige Stelle ein
        emptySections.forEach(function(section) {
            insertEmptySection(section);
        });

    }, 'json');
}
/**
 * Fügt eine leere Section an die richtige Stelle ein
 */
function insertEmptySection(section) {
    if ($('tr.section-header[data-section-id="' + section.id + '"]').length > 0) {
        debugLog('Section ' + section.title + ' existiert bereits, überspringe');
        return;
    }

    debugLog('Füge leere Section ein: ' + section.title + ' (order: ' + section.line_order + ')');

    var sectionHtml = '<tr class="section-header section-empty" data-section-id="' + section.id + '" data-section-title="' + section.title + '" data-line-order="' + section.line_order + '" data-product-count="0" data-product-ids="[]">';
    
    // Titel (colspan=10)
    sectionHtml += '<td colspan="9" style="font-weight:bold; padding:8px;">';
    sectionHtml += '<span class="section-toggle" onclick="toggleSection(' + section.id + '); event.stopPropagation();">▼</span>';
    sectionHtml += section.title;
    sectionHtml += '<span class="section-count">0 Produkte</span>';
	
	// Buttons
	sectionHtml += '</td><td align="right" style="white-space:nowrap;">';
	sectionHtml += '<a href="#" onclick="moveSection(' + section.id + ', \'up\'); return false;" title="Nach oben"><span class="fa fa-long-arrow-alt-up"></span></a>';
	sectionHtml += '<a href="#" onclick="moveSection(' + section.id + ', \'down\'); return false;" title="Nach unten"><span class="fa fa-long-arrow-alt-down"></span></a>';
	sectionHtml += '</td>';
    
    // Edit (Spalte 11)
    sectionHtml += '<td class="linecoledit center">';
    sectionHtml += '<a href="#" onclick="renameSection(' + section.id + '); return false;" title="Umbenennen">';
    sectionHtml += '<span class="fas fa-pencil-alt" style="color:#444;" title="Ändern"></span></a>';
    sectionHtml += '</td>';
    
    // Delete (Spalte 12) - leere Section = normaler Mülleimer
    sectionHtml += '<td class="linecoldelete center">';
    sectionHtml += '<a href="#" onclick="deleteSection(' + section.id + '); return false;" title="Leere Gruppe löschen">';
    sectionHtml += '<span class="fas fa-trash pictodelete" title="Löschen"></span></a>';
    sectionHtml += '</td>';
    
	// Move (Spalte 13)
	sectionHtml += '<td class="linecolmove tdlineupdown center"></td>';
    
    // Unlink (Spalte 14)
    sectionHtml += '<td class="linecolunlink"></td>';
    
    sectionHtml += '</tr>';

    // Finde die richtige Position
    var inserted = false;
    $('#tablelines tbody tr').each(function() {
        var $row = $(this);

        if ($row.hasClass('section-empty')) return;

        var rowOrder = parseInt($row.attr('data-line-order'));
        if (rowOrder && section.line_order < rowOrder) {
            $row.before(sectionHtml);
            inserted = true;
            debugLog('  → Eingefügt vor Zeile mit order ' + rowOrder);
            return false;
        }
    });

    if (!inserted) {
        // Finde die "Hinzufügen"-Zeile und füge davor ein
        var $addRow = $('#tablelines tbody tr.liste_titre_create');
        if ($addRow.length > 0) {
            $addRow.before(sectionHtml);
            debugLog('  → Vor Hinzufügen-Zeile eingefügt');
        } else {
            // Fallback: ans Ende
            $('#tablelines tbody').append(sectionHtml);
            debugLog('  → Ans Ende angehängt');
        }
    }
}
function initDragAndDrop() {
    debugLog('🖱️ Installiere Drop-Listener...');

    setTimeout(function() {
        debugLog('✅ Überwache Tabellen-Änderungen...');

        // Überwache die Tabelle auf Änderungen
        var observer = new MutationObserver(function(mutations) {
            mutations.forEach(function(mutation) {
                // Prüfe ob Zeilen verschoben wurden
                if (mutation.type === 'childList') {
                    // Ignoriere wenn gerade gezogen wird
                    if (isDragging) {
                        debugLog('📦 Tabelle geändert (Drag läuft noch...)');
                        return;
                    }

                    debugLog('📦 Tabelle geändert - prüfe Reihenfolge...');

                    // Warte kurz, dann speichere unsere Section-Logik
                    setTimeout(function() {
                        if (!isDragging) {
                            saveCurrentOrder();
                        }
                    }, 500);
                }
            });
        });

        // Beobachte tbody
        var tbody = document.querySelector('#tablelines tbody');
        if (tbody) {
            observer.observe(tbody, {
                childList: true,
                subtree: false
            });
            debugLog('✅ MutationObserver installiert!');
        }

    }, 2000);
}

function saveCurrentOrder() {
	// Nicht speichern wenn gerade Subtotal getoggelt wird
	if (isTogglingSubtotal) {
	       debugLog('⏸️ Skip saveCurrentOrder - Subtotal Toggle aktiv');
	       return;
	   }
	
    debugLog('💾 Speichere Section-Zuordnungen...');

    var updates = [];
    var order = 1;
    var currentSectionId = null;

    $('#tablelines tbody tr').each(function() {
        var $row = $(this);

        if ($row.hasClass('liste_titre') ||
            $row.hasClass('liste_titre_add') ||
            $row.hasClass('liste_titre_create') ||
            $row.hasClass('trlinefordates') ||
            $row.attr('id') === 'trlinefordates') {
            return;
            }

            if ($row.hasClass('section-header')) {
                var sectionId = $row.attr('data-section-id');
                if (sectionId) {
                    currentSectionId = sectionId;
                    updates.push({
                        type: 'section',
                        id: sectionId,
                        order: order
                    });
                    debugLog('  ' + order + '. 📁 Section #' + sectionId);
                    order++;
                }
            }
            else if ($row.attr('id') && $row.attr('id').indexOf('row-') === 0) {
                var productId = $row.attr('id').replace('row-', '');

                updates.push({
                    type: 'product',
                    id: productId,
                    order: order,
                    parent_section: currentSectionId
                });
                debugLog('  ' + order + '. 📦 Produkt #' + productId + ' → ' + (currentSectionId ? 'Section ' + currentSectionId : 'FREI'));
                order++;
            }
            else if ($row.hasClass('textline-row')) {
                var textlineId = $row.attr('data-textline-id');
                if (textlineId) {
                    updates.push({
                        type: 'text',
                        id: textlineId,
                        order: order,
                        parent_section: currentSectionId
                    });
                    debugLog('  ' + order + '. 📝 Text #' + textlineId + ' → ' + (currentSectionId ? 'Section ' + currentSectionId : 'FREI'));
                    order++;
                }
            }
    });

    if (updates.length === 0) {
        debugLog('⚠️ Keine Updates gefunden!');
        return;
    }

    debugLog('🚀 Sende ' + updates.length + ' Updates...');

	var docInfo = getDocumentInfo();
	$.post('/dolibarr/custom/subtotaltitle/ajax/reorder_all.php', {
	    facture_id: getFactureId(),
	    document_type: docInfo.type,
	    new_order: JSON.stringify(updates)
	}, function(response) {
	    debugLog('✅ Server: ' + JSON.stringify(response));
	    // Kein Reload mehr - Reihenfolge ist gespeichert
	    // if (response.success) {
	    //     debugLog('🔄 Reload...');
	    //     window.location.href = window.location.pathname + window.location.search;
	    // }
	}, 'json').fail(function(xhr) {
	    debugLog('❌ Fehler: ' + xhr.responseText);
	});
}

/**
 * Verschiebt ein Produkt zu einer Section
 * MUSS AUSSERHALB sein!
 */
function moveProductToSection(productId, sectionId, newLineOrder) {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    debugLog('🚀 Verschiebe Produkt ' + productId + ' zu Section ' + (sectionId || 'FREI') + ' auf Position ' + newLineOrder);

    $.post('/dolibarr/custom/subtotaltitle/ajax/move_product.php', {
        product_id: productId,
        new_section_id: sectionId || 0,
        new_line_order: newLineOrder
    }, function(response) {
        debugLog('Move response: ' + JSON.stringify(response));
        if (response.success) {
            window.location.href = window.location.pathname + window.location.search;
        } else {
            alert((lang.errorReordering || 'Fehler') + ': ' + (response.error || 'Unbekannter Fehler'));
        }
    }, 'json').fail(function(xhr, status, error) {
        if (SUBTOTAL_DEBUG) {
            console.error('AJAX Fehler: ' + status);
            console.error('Response Text: ' + xhr.responseText);
        }
        alert((lang.errorReordering || 'Fehler beim Verschieben') + (SUBTOTAL_DEBUG ? '. Siehe Console (F12) für Details.' : '.'));
    });
}


/**
 * Fügt allen Zeilen eine "Unlink"-Spalte hinzu
 */
function addUnlinkColumn() {
    var $table = $('#tablelines');
    if (!$table.length) return;
    
    // Prüfe ob schon ausgeführt
    if ($table.data('unlink-added')) {
        debugLog('🔗 Unlink-Spalte bereits vorhanden, überspringe');
        return;
    }
    $table.data('unlink-added', true);
    
    debugLog('🔗 Füge Unlink-Spalte hinzu...');
    
    // THEAD: Leere Spalte hinzufügen
    $table.find('thead tr').each(function() {
        if ($(this).find('th.linecolunlink').length === 0) {
            $(this).append('<th class="linecolunlink" style="width:24px;"></th>');
        }
    });
    
    // Alle Body-Zeilen durchgehen
    $table.find('tbody tr').each(function() {
        var $row = $(this);
        var rowId = $row.attr('id') || '';
        
        // Prüfe ob Zeile bereits eine Unlink-Spalte hat
        if ($row.find('td.linecolunlink').length > 0) {
            return;
        }
        
        // Produkt-Zeilen (row-XXX)
        if (rowId.match(/^row-\d+/)) {
            var lineId = rowId.replace('row-', '').split('-')[0];
            var parentSection = $row.attr('data-parent-section');
            
            if (parentSection && parentSection !== 'null') {
                // Hat Section → Unlink-Button
                $row.append('<td class="linecolunlink center"><a href="#" onclick="removeFromSection(' + lineId + '); return false;" title="Aus Positionsgruppe entfernen"><span class="fas fa-unlink" style="color:#888;"></span></a></td>');
            } else {
                // Keine Section → leere Zelle
                $row.append('<td class="linecolunlink"></td>');
            }
            return;
        }
        
        // Alle anderen Zeilen (trlinefordates, liste_titre, etc.): leere Zelle
        if ($row.find('td').length > 0) {
            $row.append('<td class="linecolunlink"></td>');
        }
    });
    
    debugLog('✅ Unlink-Spalte hinzugefügt');
}
/**
 * PLAN B: Section-Assignment beim Produkt hinzufügen
 */
$(document).ready(function() {
	
	// Unlink-Spalte hinzufügen (nach data-Attributen)
	    setTimeout(addUnlinkColumn, 600);
	
    // 1. Beim Submit des Formulars: Section merken
    $(document).on('submit', 'form[name="addproduct"]', function(e) {
        var selectedSection = $('#section_id_dropdown').val();

        if (selectedSection) {
            debugLog('📝 Merke Section ' + selectedSection + ' für nächstes Produkt');
            sessionStorage.setItem('pending_section_assignment', selectedSection);
            sessionStorage.setItem('pending_section_facture', getFactureId());
        }
    });

    // 2. Nach Page Reload: Prüfe ob Assignment pending ist
    var pendingSection = sessionStorage.getItem('pending_section_assignment');
    var pendingFacture = sessionStorage.getItem('pending_section_facture');
    var currentFacture = getFactureId();

    if (pendingSection && pendingFacture == currentFacture) {
        debugLog('✅ Section-Assignment pending: Section ' + pendingSection);

        // Entferne aus sessionStorage
        sessionStorage.removeItem('pending_section_assignment');
        sessionStorage.removeItem('pending_section_facture');

        // Warte kurz, dann weise zu
        setTimeout(function() {
            assignLastProductToSection(pendingSection, currentFacture);
        }, 1000);
    }
});

/**
 * Weist das neueste Produkt einer Section zu
 */
function assignLastProductToSection(sectionId, factureId) {
    var docInfo = getDocumentInfo();
    debugLog('🎯 Weise neustes Produkt zu Section ' + sectionId + ' zu (docType: ' + docInfo.type + ')...');

    $.post('/dolibarr/custom/subtotaltitle/ajax/assign_last_product.php', {
        facture_id: factureId,
        section_id: sectionId,
        document_type: docInfo.type
    }, function(response) {
        debugLog('✅ Assignment Response: ' + JSON.stringify(response));
        if (response.success) {
            debugLog('✅ Produkt #' + response.product_id + ' zu Section zugewiesen');
            window.location.href = window.location.pathname + window.location.search;
        } else {
            debugLog('❌ Fehler: ' + response.error);
        }
    }, 'json').fail(function(xhr, status, error) {
        debugLog('❌ AJAX Fehler: ' + status);
        debugLog('Response: ' + xhr.responseText);
    });
}

/**
 * Ein-/Ausklappen einer Section
 */
function toggleSection(sectionId) {
    var $sectionRow = $('tr.section-header[data-section-id="' + sectionId + '"]');
    var $toggle = $sectionRow.find('.section-toggle');
    var isCollapsed = $sectionRow.hasClass('collapsed');

    if (isCollapsed) {
        // Ausklappen
        $sectionRow.removeClass('collapsed');
        $('tr[data-parent-section="' + sectionId + '"]').removeClass('section-collapsed');
        $toggle.text('▼');
        saveCollapseState(sectionId, false);
        debugLog('📂 Section ' + sectionId + ' ausgeklappt');
    } else {
        // Einklappen
        $sectionRow.addClass('collapsed');
        $('tr[data-parent-section="' + sectionId + '"]').addClass('section-collapsed');
        $toggle.text('▶');
        saveCollapseState(sectionId, true);
        debugLog('📁 Section ' + sectionId + ' eingeklappt');
    }
}

/**
 * Alle Sections einklappen
 */
function collapseAllSections() {
    $('tr.section-header').each(function() {
        var sectionId = $(this).attr('data-section-id');
        $(this).addClass('collapsed');
        $('tr[data-parent-section="' + sectionId + '"]').addClass('section-collapsed');
        saveCollapseState(sectionId, true);
    });
    debugLog('📁 Alle Sections eingeklappt');
}

/**
 * Alle Sections ausklappen
 */
function expandAllSections() {
    $('tr.section-header').each(function() {
        var sectionId = $(this).attr('data-section-id');
        $(this).removeClass('collapsed');
        $('tr[data-parent-section="' + sectionId + '"]').removeClass('section-collapsed');
        saveCollapseState(sectionId, false);
    });
    debugLog('📂 Alle Sections ausgeklappt');
}

/**
 * Speichert Collapse-Zustand in localStorage
 */
function saveCollapseState(sectionId, isCollapsed) {
    var key = 'section_collapsed_' + sectionId;
    if (isCollapsed) {
        localStorage.setItem(key, '1');
        debugLog('💾 Gespeichert: ' + key + ' = 1');
    } else {
        localStorage.removeItem(key);
        debugLog('💾 Gelöscht: ' + key);
    }
}

/**
 * Lädt Collapse-Zustand aus localStorage
 */
function loadCollapseState(sectionId) {
    var key = 'section_collapsed_' + sectionId;
    var value = localStorage.getItem(key);
    debugLog('📂 Lade: ' + key + ' = ' + value);
    return value === '1';
}

function initCollapse() {
    debugLog('🔽 Initialisiere Collapse...');

    // Aktualisiere Count und lade Zustand für jede Section
    $('tr.section-header').each(function() {
        var sectionId = $(this).attr('data-section-id');
        var productCount = $('tr[data-parent-section="' + sectionId + '"]').length;

        // Update count
        $(this).find('.section-count').text(productCount + ' Produkte');

        // Lade gespeicherten Zustand
        var isCollapsed = loadCollapseState(sectionId);
        if (isCollapsed) {
            $(this).addClass('collapsed');
            $(this).find('.section-toggle').text('▶');
            $('tr[data-parent-section="' + sectionId + '"]').addClass('section-collapsed');
            debugLog('Section ' + sectionId + ': ' + productCount + ' Produkte (eingeklappt)');
        } else {
            debugLog('Section ' + sectionId + ': ' + productCount + ' Produkte');
        }
    });

    colorSections();
    
    // NEU: Fehlende Subtotals einfügen
    insertMissingSubtotals();

    debugLog('✅ Collapse initialisiert');
}
/**
 * Fügt fehlende Subtotals am Ende ein (für letzte Section)
 */
function insertMissingSubtotals() {
    debugLog('🔢 Prüfe fehlende Subtotals...');
    
    $('tr.section-header').each(function() {
        var $header = $(this);
        var sectionId = $header.attr('data-section-id');
        var $checkbox = $header.find('.subtotal-toggle');
        
        // Nur wenn Checkbox aktiviert ist
        if (!$checkbox.length || !$checkbox.is(':checked')) {
            return;
        }
        
        // Finde letztes Produkt dieser Section
        var $products = $('tr[data-parent-section="' + sectionId + '"]');
        if ($products.length === 0) {
            return;
        }
        
        var $lastProduct = $products.last();
        
        // Prüfe ob direkt danach schon ein Subtotal kommt
        var $nextRow = $lastProduct.next('tr');
        if ($nextRow.hasClass('subtotal-row')) {
            debugLog('  Section ' + sectionId + ': Subtotal vorhanden ✓');
            return;
        }
        
        debugLog('  Section ' + sectionId + ': Subtotal fehlt - füge ein...');
        
        // Berechne Summe aus Produktzeilen
        var sum = 0;
        $products.each(function() {
            var $row = $(this);
            // Versuche Netto-Betrag aus der Zeile zu holen
            var priceText = $row.find('td.linecolht').text().trim();
            if (!priceText) {
                // Fallback: letzte Spalte mit Zahl
                $row.find('td').each(function() {
                    var text = $(this).text().trim();
                    if (text.match(/^-?[\d\s.,]+$/)) {
                        priceText = text;
                    }
                });
            }
            if (priceText) {
                var price = parseFloat(priceText.replace(/\s/g, '').replace('.', '').replace(',', '.'));
                if (!isNaN(price)) {
                    sum += price;
                }
            }
        });
        
        var formattedSum = sum.toLocaleString('de-DE', {
            minimumFractionDigits: 2,
            maximumFractionDigits: 2
        });
        
		// Subtotal-Zeile einfügen
		var html = '<tr class="subtotal-row" data-section-id="' + sectionId + '" style="font-weight:bold;">';
		html += '<td colspan="9" style="text-align:right; padding:8px;">Zwischensumme:</td>';
		html += '<td class="linecolht right" style="padding:8px;">' + formattedSum + '</td>';
		html += '<td class="linecoledit"></td>';
		html += '<td class="linecoldelete"></td>';
		html += '<td class="linecolmove"></td>';
		html += '<td class="linecolunlink"></td>';
		html += '</tr>';
        
        $lastProduct.after(html);
        debugLog('  → Subtotal eingefügt: ' + formattedSum + ' €');
    });
}

$(document).ready(function() {
    setTimeout(function() {
        insertEmptySections();  // ← HIER HINZUFÜGEN!
        insertTextLines();
        initCollapse();
    }, 1500);
});

/**
 * Fügt Textzeilen an die richtige Stelle ein
 */
function insertTextLines() {
    var docInfo = getDocumentInfo();
    if (!docInfo.id) return;

    debugLog('📝 Lade Textzeilen für ' + docInfo.type + ' ID ' + docInfo.id);

    $.get('/dolibarr/custom/subtotaltitle/ajax/get_textlines.php', {
        facture_id: docInfo.id,
        document_type: docInfo.type
    }, function(response) {
        if (!response.success) return;

        debugLog('Gefundene Textzeilen: ' + response.textlines.length);

        response.textlines.forEach(function(textline) {
            insertTextLine(textline);
        });

        // tableDnD neu initialisieren damit Textzeilen ziehbar sind
        if (response.textlines.length > 0) {
            reinitTableDnD();
        }

    }, 'json');
}

function toggleSubtotal(sectionId, checkbox) {
    event.stopPropagation();
    
    var show = checkbox.checked;
    
    debugLog('🔢 Toggle Subtotal für Section ' + sectionId + ': ' + show);
    
    $.ajax({
        url: '/dolibarr/custom/subtotaltitle/ajax/toggle_subtotal.php',
        method: 'POST',
        data: {
            section_id: sectionId,
            show: show ? 1 : 0
        },
        dataType: 'json',
        success: function(response) {
            debugLog('Subtotal Response: ' + JSON.stringify(response));
            if (response.success && response.reload) {
                window.location.reload();
            }
        },
        error: function(xhr, status, error) {
            debugLog('Subtotal AJAX Error: ' + error);
        }
    });
}

/**
 * Initialisiert tableDnD neu für dynamisch hinzugefügte Zeilen
 */
function reinitTableDnD() {
    debugLog('🔄 Reinitialisiere tableDnD...');

    var $table = $('#tablelines');
    if ($table.length && typeof $.fn.tableDnD !== 'undefined') {

        // Neu initialisieren
        $table.tableDnD({
            onDragClass: 'myDragClass',
            dragHandle: '.linecolmove',
            onDragStart: function(table, row) {
                isDragging = true;
                debugLog('🎯 Drag gestartet: ' + row.className);
            },
            onDrop: function(table, row) {
                isDragging = false;
                debugLog('📦 Drop: ' + row.className);

                // Kurz warten, dann speichern
                setTimeout(function() {
                    saveCurrentOrder();
                }, 300);
            }
        });

        debugLog('✅ tableDnD neu initialisiert');
    }
}

/**
 * Fügt eine Textzeile an die richtige Stelle ein
 */
function insertTextLine(textline) {
    if ($('tr.textline-row[data-textline-id="' + textline.id + '"]').length > 0) {
        debugLog('Textzeile ' + textline.id + ' existiert bereits, überspringe');
        return;
    }

    debugLog('Füge Textzeile ein: ' + textline.title + ' (order: ' + textline.line_order + ')');

    var html = '<tr class="textline-row drag" data-textline-id="' + textline.id + '" data-line-order="' + textline.line_order + '">';
    
    // Inhalt (colspan=10)
    html += '<td colspan="10" style="padding:8px; font-style:italic; font-weight:bold;">';
    html += textline.title;
    html += '</td>';
    
    // Edit (Spalte 11)
    html += '<td class="linecoledit center">';
    html += '<a href="#" onclick="editTextLine(' + textline.id + '); return false;" title="Bearbeiten">';
    html += '<span class="fas fa-pencil-alt" style="color:#444;"></span></a>';
    html += '</td>';
    
    // Delete (Spalte 12)
    html += '<td class="linecoldelete center">';
    html += '<a href="#" onclick="deleteTextLine(' + textline.id + '); return false;" title="Löschen">';
    html += '<span class="fas fa-trash pictodelete"></span></a>';
    html += '</td>';
    
    // Move (Spalte 13)
    html += '<td class="linecolmove tdlineupdown center"></td>';
    
    // Unlink (Spalte 14)
    html += '<td class="linecolunlink"></td>';
    
    html += '</tr>';

    // Finde die richtige Position
    var inserted = false;
    $('#tablelines tbody tr').each(function() {
        var $row = $(this);
        var rowOrder = parseInt($row.attr('data-line-order'));

        if (rowOrder && textline.line_order < rowOrder) {
            $row.before(html);
            inserted = true;
            debugLog('  → Eingefügt vor Zeile mit order ' + rowOrder);
            return false;
        }
    });

    if (!inserted) {
        var $addRow = $('#tablelines tbody tr.liste_titre_create');
        if ($addRow.length > 0) {
            $addRow.before(html);
            debugLog('  → Vor Hinzufügen-Zeile eingefügt');
        } else {
            $('#tablelines tbody').append(html);
            debugLog('  → Ans Ende angehängt');
        }
    }
}

/**
 * Erstellt eine neue Textzeile
 */
function createTextLine() {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    var text = prompt(lang.textlineContent || 'Text eingeben:');
    if (!text) return;

    var docInfo = getDocumentInfo();
    if (!docInfo.id) {
        alert(lang.errorLoadingSections || 'Fehler: Keine Dokument-ID gefunden');
        return;
    }

    debugLog('Erstelle Textzeile für ' + docInfo.type + ' ID ' + docInfo.id);

    $.post('/dolibarr/custom/subtotaltitle/ajax/create_textline.php', {
        facture_id: docInfo.id,
        document_type: docInfo.type,
        text: text
    }, function(response) {
        debugLog('Textzeile erstellt: ' + JSON.stringify(response));
        if (response.success) {
            window.location.href = window.location.pathname + window.location.search;
        } else {
            alert((lang.errorSavingTextline || 'Fehler') + ': ' + (response.error || 'Unbekannter Fehler'));
        }
    }, 'json').fail(function(xhr, status, error) {
        debugLog('AJAX Fehler: ' + status + ' ' + error);
        alert((lang.errorSavingTextline || 'Fehler beim Erstellen') + ': ' + error);
    });
}

/**
 * Textzeile bearbeiten
 */
function editTextLine(textlineId, currentText) {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    var newText = prompt(lang.textlineContent || 'Text bearbeiten:', currentText || '');
    if (!newText) return;

    debugLog('✏️ Bearbeite Textzeile ' + textlineId);

    $.post('/dolibarr/custom/subtotaltitle/ajax/edit_textline.php', {
        textline_id: textlineId,
        text: newText
    }, function(response) {
        debugLog('Edit response: ' + JSON.stringify(response));
        if (response.success) {
            window.location.href = window.location.pathname + window.location.search;
        } else {
            alert((lang.errorSavingTextline || 'Fehler') + ': ' + (response.error || 'Unbekannter Fehler'));
        }
    }, 'json').fail(function(xhr, status, error) {
        debugLog('AJAX Fehler: ' + status + ' ' + error);
        alert((lang.errorSavingTextline || 'Fehler beim Bearbeiten') + ': ' + error);
    });
}

/**
 * Textzeile löschen
 */
function deleteTextLine(textlineId) {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    if (!confirm(lang.confirmDeleteTextline || 'Textzeile wirklich löschen?')) {
        return;
    }

    debugLog('🗑️ Lösche Textzeile ' + textlineId);

    $.post('/dolibarr/custom/subtotaltitle/ajax/delete_textline.php', {
        textline_id: textlineId
    }, function(response) {
        debugLog('Delete response: ' + JSON.stringify(response));
        if (response.success) {
            window.location.href = window.location.pathname + window.location.search;
        } else {
            alert((lang.errorDeletingTextline || 'Fehler') + ': ' + (response.error || 'Unbekannter Fehler'));
        }
    }, 'json').fail(function(xhr, status, error) {
        debugLog('AJAX Fehler: ' + status + ' ' + error);
        alert((lang.errorDeletingTextline || 'Fehler beim Löschen') + ': ' + error);
    });
}

/**
 * Entfernt ein Produkt aus seiner Section
 */
function removeFromSection(productId) {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    if (!confirm(lang.confirmRemoveFromSection || 'Produkt aus Positionsgruppe entfernen?')) {
        return;
    }

    debugLog('🔓 Entferne Produkt ' + productId + ' aus Section');

    $.post('/dolibarr/custom/subtotaltitle/ajax/remove_from_section.php', {
        product_id: productId
    }, function(response) {
        debugLog('Remove response: ' + JSON.stringify(response));
        if (response.success) {
            window.location.href = window.location.pathname + window.location.search;
        } else {
            alert((lang.errorReordering || 'Fehler') + ': ' + (response.error || 'Unbekannter Fehler'));
        }
    }, 'json').fail(function(xhr, status, error) {
        debugLog('AJAX Fehler: ' + status + ' ' + error);
        alert((lang.errorReordering || 'Fehler') + ': ' + error);
    });
}

function toggleMassDelete() {
    var $checkboxes = $('.mass-delete-checkbox');
    
    if ($checkboxes.length === 0) {
        // Checkboxen einblenden
        $('tr.drag[data-line-order]').each(function() {
            var $row = $(this);
            var lineId = $row.attr('id')?.match(/row-(\d+)/)?.[1];
            if (lineId) {
                $row.find('td:first').prepend(
                    '<input type="checkbox" class="mass-delete-checkbox" data-line-id="' + lineId + '" style="margin-right:8px;">'
                );
            }
        });
        
        // Buttons NACH dem Massenlösch-Button einfügen
        $('#btnMassDelete').after(
            '<a id="btnMassDoDelete" class="butActionDelete" href="#" onclick="deleteMassSelected(); return false;" style="background:#c00;color:#fff;margin-left:5px;">Ausgewählte löschen</a>' +
            '<a id="btnMassSelectAll" class="butAction" href="#" onclick="selectAllLines(); return false;">Alle auswählen</a>' +
            '<a id="btnMassCancel" class="butAction" href="#" onclick="toggleMassDelete(); return false;">Abbrechen</a>'
        );
        
        // Original-Button verstecken
        $('#btnMassDelete').hide();
        
    } else {
        // Checkboxen + Buttons entfernen
        $('.mass-delete-checkbox').remove();
        $('#btnMassDoDelete, #btnMassSelectAll, #btnMassCancel').remove();
        $('#btnMassDelete').show();
    }
}

function selectAllLines() {
    $('.mass-delete-checkbox').prop('checked', true);
}

function deleteMassSelected() {
    var lang = (typeof subtotalTitleLang !== 'undefined') ? subtotalTitleLang : {};
    var selectedIds = [];

    $('.mass-delete-checkbox:checked').each(function() {
        selectedIds.push($(this).data('line-id'));
    });

    if (selectedIds.length === 0) {
        alert(lang.noLinesSelected || 'Keine Zeilen ausgewählt!');
        return;
    }

    var msg1 = (lang.confirmDeleteLines || 'Wirklich %s Zeilen löschen?').replace('%s', selectedIds.length);
    if (!confirm(msg1)) {
        return;
    }

    var msg2 = (lang.confirmDeleteLinesWarning || 'LETZTE WARNUNG: %s Zeilen werden UNWIDERRUFLICH gelöscht!').replace('%s', selectedIds.length);
    if (!confirm(msg2)) {
        return;
    }

    $.post('/dolibarr/custom/subtotaltitle/ajax/mass_delete.php', {
        line_ids: JSON.stringify(selectedIds),
        facture_id: getFactureId()
    }, function(response) {
        if (response.success) {
            window.location.reload();
        } else {
            alert((lang.errorDeletingSection || 'Fehler') + ': ' + (response.error || 'Unbekannt'));
        }
    }, 'json');
}

function getFactureId() {
    // Aus URL holen (funktioniert für alle Dokumenttypen)
    var match = window.location.search.match(/id=(\d+)/);
    return match ? match[1] : 0;
}

function getDocumentType() {
    // Erkenne Dokumenttyp aus URL
    var path = window.location.pathname;
    if (path.indexOf('/compta/facture/') > -1 || path.indexOf('/facture/') > -1) {
        return 'invoice';
    }
    if (path.indexOf('/comm/propal/') > -1 || path.indexOf('/propal/') > -1) {
        return 'propal';
    }
    if (path.indexOf('/commande/') > -1) {
        return 'order';
    }
    return 'invoice'; // Fallback
}

/**
 * Färbt Sections unterschiedlich ein
 */
function colorSections() {
    debugLog('🎨 Färbe Sections ein...');

    var colors = ['#4a90d9', '#50b87d', '#e67e22', '#9b59b6', '#e74c3c', '#1abc9c', '#f39c12', '#3498db'];
    var colorIndex = 0;

    $('tr.section-header').each(function() {
        var sectionId = $(this).attr('data-section-id');
        var color = colors[colorIndex % colors.length];

        // Section-Header färben
        $(this).find('td:first').css('border-left', '4px solid ' + color);

        // Alle Produkte dieser Section färben
        $('tr[data-parent-section="' + sectionId + '"]').each(function() {
            $(this).find('td:first').css('border-left', '4px solid ' + color);
            $(this).find('td').css('background-color', hexToRgba(color, 0.05));
        });

        // Textzeilen dieser Section färben
        $('tr.textline-row[data-parent-section="' + sectionId + '"]').each(function() {
            $(this).find('td:first').css('border-left', '4px solid ' + color);
        });

        debugLog('  Section ' + sectionId + ' → ' + color);
        colorIndex++;
    });

    debugLog('✅ Sections eingefärbt');
}

/**
 * Hex zu RGBA konvertieren
 */
function hexToRgba(hex, alpha) {
    var r = parseInt(hex.slice(1, 3), 16);
    var g = parseInt(hex.slice(3, 5), 16);
    var b = parseInt(hex.slice(5, 7), 16);
    return 'rgba(' + r + ', ' + g + ', ' + b + ', ' + alpha + ')';
}