globalThis.Wegwichtel = globalThis.Wegwichtel || {};

(function (ns) {
  'use strict';

  const ids = Object.freeze({
    addPoi: 'editor-add-poi',
    button: 'editor-button',
    close: 'editor-close',
    dialog: 'editor-dialog',
    dialogTitle: 'editor-dialog-title',
    newRoute: 'editor-new-route',
    poiAudio: 'editor-poi-audio',
    poiAudioAdd: 'editor-poi-audio-add',
    poiCancel: 'editor-poi-cancel',
    poiDelete: 'editor-poi-delete',
    poiDescription: 'editor-poi-description',
    poiForm: 'editor-poi-form',
    poiFormTitle: 'editor-poi-form-title',
    poiFormView: 'editor-poi-form-view',
    poiId: 'editor-poi-id',
    poiImages: 'editor-poi-images',
    poiImagesAdd: 'editor-poi-images-add',
    poiLat: 'editor-poi-lat',
    poiList: 'editor-poi-list',
    poiLon: 'editor-poi-lon',
    poiMediaPreview: 'editor-poi-media-preview',
    poiMediaStatus: 'editor-poi-media-status',
    poiRadius: 'editor-poi-radius',
    poiSave: 'editor-poi-save',
    poiTitle: 'editor-poi-title',
    routeActivated: 'editor-route-activated',
    routeBack: 'editor-route-back',
    routeDescription: 'editor-route-description',
    routeDetailTitle: 'editor-route-detail-title',
    routeDetailView: 'editor-route-detail-view',
    routeForm: 'editor-route-form',
    routeGpx: 'editor-route-gpx',
    routeGpxGroup: 'editor-route-gpx-group',
    routeId: 'editor-route-id',
    routeList: 'editor-route-list',
    routeListTitle: 'editor-route-list-title',
    routeListView: 'editor-route-list-view',
    routeName: 'editor-route-name',
    routeSave: 'editor-route-save',
    routeUpload: 'editor-route-upload',
    rightsOpen: 'editor-rights-open',
    status: 'editor-status'
  });

  const classes = Object.freeze({
    button: 'editor-button',
    dialog: 'editor-dialog',
    dialogHeader: 'editor-dialog-header',
    dangerButton: 'editor-danger-button',
    dangerIcon: 'editor-danger-icon',
    dialogShell: 'editor-dialog-shell',
    formActions: 'editor-form-actions',
    form: 'editor-form',
    gpxGroup: 'editor-gpx-group',
    iconButton: 'editor-icon-button',
    iconDanger: 'editor-icon-danger',
    iconRow: 'editor-icon-row',
    mediaActions: 'editor-media-actions',
    mediaButton: 'editor-media-button',
    mediaIcon: 'editor-media-icon',
    mediaPreview: 'editor-media-preview',
    mediaPreviewAudio: 'editor-media-preview-audio',
    mediaPreviewCard: 'editor-media-preview-card',
    mediaPreviewImage: 'editor-media-preview-image',
    mediaPreviewSelect: 'editor-media-preview-select',
    mediaRemove: 'editor-media-remove',
    muted: 'editor-muted',
    poiItem: 'editor-poi-item',
    poiList: 'editor-poi-list',
    poiToolbar: 'editor-poi-toolbar',
    primaryButton: 'editor-primary-button',
    routeGroup: 'editor-route-group',
    routeItem: 'editor-route-item',
    routeList: 'editor-route-list',
    roundButton: 'editor-round-button',
    secondaryButton: 'editor-secondary-button',
    status: 'editor-status',
    toolbar: 'editor-toolbar',
    toolbarBack: 'editor-toolbar-back',
    view: 'editor-view'
  });

  const state = {
    currentPoi: null,
    groupDeletions: [],
    groupDeletePoint: false,
    currentRoute: null,
    currentSource: null,
    pendingAudioFile: null,
    pendingAudioHandle: null,
    pendingImages: [],
    pois: [],
    routes: [],
    selectedMediaKey: null
  };

  function ready(callback) {
    if (document.readyState === 'loading') {
      document.addEventListener('DOMContentLoaded', callback, { once: true });
      return;
    }
    callback();
  }

  function byId(id) {
    return document.getElementById(id);
  }

  function text(value) {
    return String(value ?? '');
  }

  function numberOrNull(value) {
    const parsed = Number(value);
    return Number.isFinite(parsed) ? parsed : null;
  }

  function routeId(route) {
    return text(route?.id ?? route?.routeId);
  }

  function poiId(poi) {
    return text(poi?.id ?? poi?.poiId);
  }

  function numericPoiId(value) {
    const raw = text(value).trim();
    if (!raw) return null;
    const parsed = Number(raw);
    return Number.isSafeInteger(parsed) && parsed >= 0 ? parsed : null;
  }

  function nextLocalPoiId() {
    let highest = -1;
    for (const poi of state.pois) {
      const identifier = numericPoiId(poi?.id ?? poi?.poiId);
      if (identifier != null && identifier > highest) highest = identifier;
    }
    const next = highest + 1;
    if (!Number.isSafeInteger(next)) {
      throw new TypeError(ns.I18n.t("editor.error.add-station"));
    }
    return next;
  }

  function routeName(route) {
    return text(route?.name || route?.title || ns.I18n.t("editor.untitled-route"));
  }

  function poiTitle(poi) {
    return text(poi?.title || poi?.name || ns.I18n.t("editor.untitled-station"));
  }

  function apiBase() {
    const base = ns.Config?.apiBase || '/api';
    return base.endsWith('/') ? base.slice(0, -1) : base;
  }

  function apiUrl(path) {
    return `${apiBase()}${path}`;
  }

  function setHidden(element, hidden) {
    if (element) element.hidden = hidden;
  }

  function setExpanded(element, expanded) {
    if (element) element.setAttribute('aria-expanded', String(expanded));
  }

  function setDialogExpanded(expanded) {
    setExpanded(byId(ids.button), expanded);
  }

  function setDisabled(element, disabled) {
    if (!element) return;
    element.disabled = disabled;
    element.setAttribute('aria-disabled', String(disabled));
  }

  function setStatus(message, isError = false) {
    const status = byId(ids.status);
    if (!status) return;
    status.textContent = isError ? (ns.UserMessages?.error(message) || message) : message;
    status.hidden = !message;
    status.dataset.kind = isError ? 'error' : 'notice';
  }

  function setDialogTitle(value) {
    const title = byId(ids.dialogTitle);
    if (title) title.textContent = value;
  }

  function routeDialogTitle() {
    if (state.currentSource === 'local') {
      return routeId(state.currentRoute) ? ns.I18n.t("editor.edit-draft") : ns.I18n.t("editor.new-route");
    }
    return ns.I18n.t("editor.view-route");
  }

  let poiMediaGeneration = 0;
  let previewPoi = null;

  function releasePoiPreview() {
    poiMediaGeneration += 1;
    ns.LocalRoutes?.releasePoiMedia?.(previewPoi);
    previewPoi = null;
  }

  function showListView() {
    ns.GroupPoints?.release();
    releasePoiPreview();
    ns.RouteRecorder?.endEditing();
    setDialogTitle('Streckenverwaltung');
    setHidden(byId(ids.routeListView), false);
    setHidden(byId(ids.routeDetailView), true);
    setHidden(byId(ids.poiFormView), true);
  }

  function showRouteView() {
    ns.GroupPoints?.release();
    releasePoiPreview();
    setDialogTitle(routeDialogTitle());
    setHidden(byId(ids.routeListView), true);
    setHidden(byId(ids.routeDetailView), false);
    setHidden(byId(ids.poiFormView), true);
  }

  function showPoiView() {
    setDialogTitle(state.currentPoi ? ns.I18n.t("editor.edit-station") : ns.I18n.t("editor.add-station"));
    setHidden(byId(ids.routeListView), true);
    setHidden(byId(ids.routeDetailView), true);
    setHidden(byId(ids.poiFormView), false);
  }

  function isActivation(event) {
    if (event.type === 'pointerup') {
      if (event.isPrimary === false) return false;
      return event.pointerType !== 'mouse' || event.button === 0;
    }
    return event.type === 'keydown' && (event.key === 'Enter' || event.key === ' ');
  }

  function activate(element, handler) {
    if (!element) return;
    element.addEventListener('pointerup', event => {
      if (!isActivation(event)) return;
      event.preventDefault();
      handler(event);
    });
    element.addEventListener('keydown', event => {
      if (!isActivation(event)) return;
      event.preventDefault();
      handler(event);
    });
  }

  function submit(form, handler) {
    if (!form) return;
    form.addEventListener('submit', event => {
      event.preventDefault();
      handler(event);
    });
  }

  async function parseJson(response) {
    const raw = await response.text();
    if (!raw.trim()) return {};
    try {
      return JSON.parse(raw);
    } catch {
      return {};
    }
  }

  async function handleResponse(response) {
    if ([401, 403].includes(response.status) && state.currentSource === 'group') {
      throw new Error(ns.I18n.t('groups.error.access'));
    }
    if (response.status === 423) throw new Error(ns.I18n.t('point-locks.lost'));
    if (response.status === 409 && response.headers?.get('X-Group-Route')) {
      throw new Error(ns.I18n.t('groups.error.conflict'));
    }
    if (response.ok) {
      ns.Groups?.observe?.(response);
      ns.GroupPoints?.observe?.(response);
      return parseJson(response);
    }
    const payload = await parseJson(response);
    const error = new Error(payload.message || ns.I18n.t("editor.error.action"));
    error.status = response.status;
    throw error;
  }

  async function readJson(path) {
    const response = await fetch(apiUrl(path), {
      credentials: 'same-origin',
      headers: { ...ns.Groups?.headersFor?.(path), ...ns.GroupPoints?.headersFor?.(path), Accept: 'application/json' }
    });
    return handleResponse(response);
  }

  async function sendJson(path, method, body) {
    const response = await fetch(apiUrl(path), {
      body: JSON.stringify(body),
      credentials: 'same-origin',
      headers: {
        ...ns.Groups?.headersFor?.(path), ...ns.GroupPoints?.headersFor?.(path),
        Accept: 'application/json',
        'Content-Type': 'application/json'
      },
      method
    });
    return handleResponse(response);
  }

  async function sendForm(path, method, formData) {
    const response = await fetch(apiUrl(path), {
      body: formData,
      credentials: 'same-origin',
      headers: { ...ns.Groups?.headersFor?.(path), ...ns.GroupPoints?.headersFor?.(path), Accept: 'application/json' },
      method
    });
    return handleResponse(response);
  }

  async function sendDelete(path) {
    const response = await fetch(apiUrl(path), {
      credentials: 'same-origin',
      headers: { ...ns.Groups?.headersFor?.(path), ...ns.GroupPoints?.headersFor?.(path), Accept: 'application/json' },
      method: 'DELETE'
    });
    return handleResponse(response);
  }

  function routeArray(payload) {
    if (Array.isArray(payload)) return payload;
    if (Array.isArray(payload?.routes)) return payload.routes;
    if (Array.isArray(payload?.items)) return payload.items;
    return [];
  }

  function poiArray(route) {
    if (Array.isArray(route?.pois)) return route.pois;
    if (Array.isArray(route?.pointsOfInterest)) return route.pointsOfInterest;
    return [];
  }

  function appendText(parent, tagName, value) {
    const child = document.createElement(tagName);
    child.textContent = value;
    parent.appendChild(child);
    return child;
  }

  function iconButton(label, symbol, action, disabled = false, danger = false) {
    const button = document.createElement('button');
    button.className = danger ? `${classes.iconButton} ${classes.iconDanger}` : classes.iconButton;
    button.dataset.editorAction = action;
    button.textContent = symbol;
    button.title = label;
    button.type = 'button';
    button.setAttribute('aria-label', label);
    setDisabled(button, disabled);
    return button;
  }

  function routeSource(route) {
    return route?._source || route?.source || 'server';
  }

  function routeItem(route) {
    const item = document.createElement('li');
    item.className = classes.routeItem;
    item.dataset.routeId = routeId(route);
    item.dataset.routeSource = routeSource(route);

    const label = document.createElement('div');
    appendText(label, 'strong', routeName(route));
    appendText(label, 'small', routeSource(route) === 'local' ? ns.I18n.t("app.draft") : ns.I18n.t("editor.published-route"));
    if (routeSource(route) === 'local' && route.submissionStatus) {
      appendText(label, 'small', ns.I18n.t(`editor.${route.submissionStatus}`));
    }

    const actions = document.createElement('div');
    actions.className = classes.iconRow;
    actions.appendChild(iconButton(ns.I18n.t("editor.edit-route"), '✎', 'edit-route'));
    if (ns.Groups?.shareButton) actions.appendChild(ns.Groups.shareButton('share-route'));
    if (routeSource(route) === 'local') {
      actions.appendChild(iconButton(ns.I18n.t("editor.delete-route"), '×', 'delete-route', false, true));
    }
    item.append(label, actions);
    return item;
  }

  function routeGroup(title) {
    const item = document.createElement('li');
    item.className = classes.routeGroup;
    item.textContent = title;
    return item;
  }

  function poiItem(poi, index) {
    const item = document.createElement('li');
    item.className = classes.poiItem;
    item.dataset.poiId = poiId(poi);
    const title = poiTitle(poi);
    const label = document.createElement('div');
    appendText(label, 'strong', title);
    appendText(label, 'small', ns.I18n.t("editor.station-number", { value1: index + 1 }));
    const actions = document.createElement('div');
    actions.className = classes.iconRow;
    actions.appendChild(iconButton(ns.I18n.t("editor.station.up", { value1: title }), '↑', 'move-poi-up', index === 0));
    actions.appendChild(iconButton(ns.I18n.t("editor.station.down", { value1: title }), '↓', 'move-poi-down', index === state.pois.length - 1));
    actions.appendChild(iconButton(`${title} bearbeiten`, '✎', 'edit-poi'));
    actions.appendChild(iconButton(ns.I18n.t("editor.delete-item", { value1: title }), '×', 'delete-poi', false, true));
    item.append(label, actions);
    return item;
  }

  function renderRouteGroup(list, title, routes, emptyText) {
    list.appendChild(routeGroup(title));
    if (!routes.length) {
      const item = document.createElement('li');
      item.className = classes.routeItem;
      appendText(item, 'span', emptyText);
      list.appendChild(item);
      return;
    }
    routes.forEach(route => list.appendChild(routeItem(route)));
  }

  function renderRouteList() {
    const list = byId(ids.routeList);
    if (!list) return;
    list.textContent = '';
    const serverRoutes = state.routes.filter(route => routeSource(route) === 'server');
    const localRoutes = state.routes.filter(route => routeSource(route) === 'local');
    renderRouteGroup(list, ns.I18n.t("editor.drafts"), localRoutes, ns.I18n.t("editor.no-draft"));
    renderRouteGroup(list, ns.I18n.t("editor.public-routes"), serverRoutes, ns.I18n.t("app.no-public-route"));
  }

  function renderPoiList() {
    const list = byId(ids.poiList);
    if (!list) return;
    list.textContent = '';
    if (!state.pois.length) {
      const item = document.createElement('li');
      item.className = classes.poiItem;
      appendText(item, 'span', ns.I18n.t("editor.no-stations"));
      list.appendChild(item);
      return;
    }
    state.pois.forEach((poi, index) => list.appendChild(poiItem(poi, index)));
  }

  function localRouteSummaries() {
    if (!ns.LocalRoutes) return [];
    return ns.LocalRoutes.list().map(routePackage => ({
      ...routePackage.route,
      id: routePackage.id,
      _source: 'local'
    }));
  }

  let routeListGeneration = 0;
  let shareInProgress = false;

  async function loadRoutes() {
    const requestGeneration = ++routeListGeneration;
    state.routes = [...localRouteSummaries(), ...state.routes.filter(route => routeSource(route) === 'server')];
    renderRouteList();
    setStatus('');
    // Local drafts are usable even while this request is waiting for a connection.
    refreshPublicRoutes(requestGeneration);
    refreshSubmittedRoutes(requestGeneration);
  }

  async function refreshSubmittedRoutes(requestGeneration) {
    const submitted = localRouteSummaries().filter(route => route.serverRouteId);
    await Promise.allSettled(submitted.map(async route => {
      const existing = await findSubmittedRoute(route.serverRouteId);
      if (requestGeneration !== routeListGeneration) return;
      const latest = ns.LocalRoutes.get(route.id);
      if (!latest || String(latest.route.serverRouteId) !== String(route.serverRouteId)) return;
      const submissionStatus = submittedStatus(existing);
      if ((latest.route.submissionStatus || null) === submissionStatus) return;
      latest.route.submissionStatus = submissionStatus;
      const saved = ns.LocalRoutes.save(latest);
      if (state.currentSource === 'local' && routeId(state.currentRoute) === route.id) {
        state.currentRoute.submissionStatus = submissionStatus;
        renderLocalSubmissionStatus(saved.route);
      }
    }));
    if (requestGeneration !== routeListGeneration) return;
    state.routes = [...localRouteSummaries(), ...state.routes.filter(route => routeSource(route) === 'server')];
    renderRouteList();
  }

  function renderLocalSubmissionStatus(route) {
    const uploaded = Boolean(route?.serverRouteId);
    const uploadButton = byId(ids.routeUpload);
    if (uploadButton) uploadButton.textContent = ns.I18n.t(uploaded ? 'editor.submitted' : 'editor.submit');
    const hint = uploaded ? 'editor.submitted-hint' : 'editor.draft-hint';
    byId(ids.routeActivated).textContent = ns.I18n.t(route?.submissionStatus ? `editor.${route.submissionStatus}-hint` : hint);
  }

  async function refreshPublicRoutes(requestGeneration) {
    const listIsVisible = () => byId(ids.dialog)?.open && !byId(ids.routeListView)?.hidden;
    try {
      const payload = await readJson('/routes?activatedOnly=true');
      if (requestGeneration !== routeListGeneration) return;
      const serverRoutes = routeArray(payload).map(route => ({ ...route, _source: 'server' }));
      state.routes = [...localRouteSummaries(), ...serverRoutes];
      renderRouteList();
    } catch {
      if (requestGeneration === routeListGeneration && listIsVisible()) {
        setStatus(ns.I18n.t('editor.public-unavailable'));
      }
    }
  }

  async function openEditor() {
    const dialog = byId(ids.dialog);
    if (!dialog) return;
    if (!dialog.open) {
      if (typeof dialog.showModal === 'function') dialog.showModal();
      else dialog.setAttribute('open', '');
    }
    setDialogExpanded(true);
    showListView();
    await guarded(loadRoutes);
    ns.Groups?.refresh?.();
  }

  async function openNewLocalRoute() {
    await openEditor();
    newRoute();
  }

  function closeEditor() {
    if (pointSaveInProgress) return;
    ns.GroupPoints?.release();
    releasePoiPreview();
    ns.RouteRecorder?.endEditing();
    const dialog = byId(ids.dialog);
    if (dialog?.open && typeof dialog.close === 'function') dialog.close();
    else if (dialog?.open) dialog.removeAttribute('open');
    setDialogExpanded(false);
    setStatus('');
  }

  function routeFromForm() {
    return {
      description: byId(ids.routeDescription)?.value.trim() || '',
      name: byId(ids.routeName)?.value.trim() || ''
    };
  }

  function poiFromForm() {
    return {
      description: byId(ids.poiDescription)?.value.trim() || '',
      lat: numberOrNull(byId(ids.poiLat)?.value),
      lon: numberOrNull(byId(ids.poiLon)?.value),
      triggerRadiusM: numberOrNull(byId(ids.poiRadius)?.value) || 25,
      sequence: state.currentPoi?.sequence ?? state.pois.length,
      title: byId(ids.poiTitle)?.value.trim() || ''
    };
  }

  function fillRouteForm(route) {
    setHidden(byId('editor-path-positions'), state.currentSource !== 'local');
    setHidden(byId('editor-recording-options'), state.currentSource !== 'local');
    if (state.currentSource === 'local') ns.RouteRecorder?.renderPoints(route.gpx || ns.LocalRoutes.emptyGpx(route.name));
    byId(ids.routeId).value = routeId(route);
    byId(ids.routeName).value = routeName(route) === ns.I18n.t("editor.untitled-route") ? '' : routeName(route);
    byId(ids.routeDescription).value = text(route?.description);
    byId(ids.routeGpx).value = '';
    setHidden(byId(ids.routeGpxGroup), state.currentSource !== 'server');

    const uploadButton = byId(ids.routeUpload);
    if (state.currentSource === 'local') {
      setHidden(uploadButton, false);
      setDisabled(uploadButton, false);
      renderLocalSubmissionStatus(route);
    } else {
      setHidden(uploadButton, true);
      setDisabled(uploadButton, true);
      byId(ids.routeActivated).textContent = route?.activatedAt || route?.activated_at
        ? ns.I18n.t("editor.read-only-hint")
        : ns.I18n.t("editor.unpublished-hint");
    }
  }

  function objectUrlFor(file) {
    if (!file || typeof globalThis.URL?.createObjectURL !== 'function') return null;
    return globalThis.URL.createObjectURL(file);
  }

  function releasePendingPreview(pending) {
    const url = pending?.previewUrl;
    if (!url?.startsWith('blob:') || typeof globalThis.URL?.revokeObjectURL !== 'function') return;
    globalThis.URL.revokeObjectURL(url);
  }

  function resetPendingMedia() {
    state.pendingAudioFile = null;
    state.pendingAudioHandle = null;
    state.pendingImages.forEach(releasePendingPreview);
    state.pendingImages = [];
    state.selectedMediaKey = null;
    if (byId(ids.poiAudio)) byId(ids.poiAudio).value = '';
    if (byId(ids.poiImages)) byId(ids.poiImages).value = '';
  }

  function existingAudioUrl(poi) {
    return poi?.audio?.url || poi?.audio?.dataUrl || poi?.audioUrl || poi?.audio_path || null;
  }

  function imagePreviewUrl(image) {
    return image?.dataUrl || image?.url || null;
  }

  function mediaPreviewCard({ key, kind, label, previewUrl = null, source, mediaId = '', mediaIndex = '' }) {
    const card = document.createElement('div');
    card.className = classes.mediaPreviewCard;
    card.dataset.selected = String(state.selectedMediaKey === key);

    const select = document.createElement('button');
    select.className = classes.mediaPreviewSelect;
    select.dataset.editorAction = 'select-media';
    select.dataset.mediaKey = key;
    select.type = 'button';
    select.setAttribute('aria-expanded', String(state.selectedMediaKey === key));
    select.setAttribute('aria-label', ns.I18n.t("editor.remove-media-label", { value1: label, value2: state.selectedMediaKey === key ? 'ausblenden' : 'anzeigen' }));

    if (kind === 'image' && previewUrl) {
      const image = document.createElement('img');
      image.className = classes.mediaPreviewImage;
      image.src = previewUrl;
      image.alt = '';
      select.appendChild(image);
    } else {
      const mediaSymbol = document.createElement('span');
      mediaSymbol.className = classes.mediaPreviewAudio;
      mediaSymbol.setAttribute('aria-hidden', 'true');
      mediaSymbol.textContent = kind === 'image' ? '▧' : '♪';
      select.appendChild(mediaSymbol);
    }
    appendText(select, 'small', label);

    const remove = document.createElement('button');
    remove.className = classes.mediaRemove;
    remove.dataset.editorAction = 'remove-media';
    remove.dataset.mediaId = text(mediaId);
    remove.dataset.mediaIndex = text(mediaIndex);
    remove.dataset.mediaKey = key;
    remove.dataset.mediaKind = kind;
    remove.dataset.mediaSource = source;
    remove.hidden = state.selectedMediaKey !== key;
    remove.type = 'button';
    remove.textContent = '−';
    remove.title = `${label} entfernen`;
    remove.setAttribute('aria-label', `${label} entfernen`);

    card.append(select, remove);
    return card;
  }

  function renderPoiMediaPreview(poi = state.currentPoi) {
    const preview = byId(ids.poiMediaPreview);
    if (!preview) return;
    preview.textContent = '';

    if (poi?.audio || existingAudioUrl(poi)) {
      preview.appendChild(mediaPreviewCard({
        key: 'existing-audio',
        kind: 'audio',
        label: poi?.audio?.name || 'Tonaufnahme',
        source: 'existing'
      }));
    }

    if (state.pendingAudioFile) {
      preview.appendChild(mediaPreviewCard({
        key: 'pending-audio',
        kind: 'audio',
        label: state.pendingAudioFile.name || ns.I18n.t("editor.new-audio"),
        source: 'pending'
      }));
    }

    const images = Array.isArray(poi?.images) ? poi.images : [];
    images.forEach((image, index) => {
      preview.appendChild(mediaPreviewCard({
        key: `existing-image-${image.id ?? index}`,
        kind: 'image',
        label: image.name || image.caption || ns.I18n.t("editor.image-number", { value1: index + 1 }),
        mediaId: image.id ?? '',
        mediaIndex: index,
        previewUrl: imagePreviewUrl(image),
        source: 'existing'
      }));
    });

    state.pendingImages.forEach((pending, index) => {
      preview.appendChild(mediaPreviewCard({
        key: pending.key,
        kind: 'image',
        label: pending.file?.name || ns.I18n.t("editor.new-image", { value1: index + 1 }),
        mediaIndex: index,
        previewUrl: pending.previewUrl || null,
        source: 'pending'
      }));
    });
  }

  function updatePoiMediaStatus(poi = state.currentPoi) {
    const status = byId(ids.poiMediaStatus);
    if (!status) return;
    const existingAudio = poi?.audio || existingAudioUrl(poi) ? 1 : 0;
    const existingImages = Array.isArray(poi?.images) ? poi.images.length : 0;
    const audioCount = existingAudio + (state.pendingAudioFile ? 1 : 0);
    const imageCount = existingImages + state.pendingImages.length;
    const parts = [];

    if (audioCount) parts.push(ns.I18n.t('media.audio.count', { count: audioCount }));
    if (imageCount) parts.push(ns.I18n.t('media.image.count', { count: imageCount }));

    status.textContent = parts.length
      ? ns.I18n.t("editor.remove-media-hint", { value1: parts.join(' · ') })
      : ns.I18n.t("editor.no-media");
  }

  function openFilePicker(inputId) {
    const input = byId(inputId);
    if (input && typeof input.click === 'function') input.click();
  }

  function pickerOptions(kind) {
    if (kind === 'audio') {
      return {
        multiple: false,
        types: [{ description: ns.I18n.t("editor.audio-section"), accept: { 'audio/*': ['.mp3', '.m4a', '.wav', '.ogg', '.webm'] } }]
      };
    }
    return {
      multiple: true,
      types: [{ description: ns.I18n.t("editor.image-section"), accept: { 'image/*': ['.jpg', '.jpeg', '.png', '.webp'] } }]
    };
  }

  async function pickWithFileSystemAccess(kind) {
    if (state.currentSource !== 'local' || typeof globalThis.showOpenFilePicker !== 'function') return false;
    let handles;
    try {
      handles = await globalThis.showOpenFilePicker(pickerOptions(kind));
    } catch (error) {
      return error?.name === 'AbortError';
    }

    if (kind === 'audio') {
      const handle = handles?.[0];
      if (!handle) return true;
      state.pendingAudioHandle = handle;
      state.pendingAudioFile = await handle.getFile();
    } else {
      for (const handle of handles || []) {
        const file = await handle.getFile();
        state.pendingImages.push({
          file,
          handle,
          key: `pending-image-${ns.LocalRoutes.createPoiId()}`,
          previewUrl: objectUrlFor(file)
        });
      }
    }
    state.selectedMediaKey = null;
    renderPoiMediaPreview();
    updatePoiMediaStatus();
    return true;
  }

  function chooseMedia(kind, inputId) {
    if (state.currentSource !== 'local' || typeof globalThis.showOpenFilePicker !== 'function') {
      openFilePicker(inputId);
      return null;
    }
    return pickWithFileSystemAccess(kind).then(handled => {
      if (!handled) openFilePicker(inputId);
    });
  }

  function fillPoiForm(poi) {
    resetPendingMedia();
    byId(ids.poiId).value = poiId(poi);
    byId(ids.poiTitle).value = poiTitle(poi) === ns.I18n.t("editor.untitled-station") ? '' : poiTitle(poi);
    byId(ids.poiDescription).value = text(poi?.description || poi?.text);
    byId(ids.poiLat).value = text(poi?.lat ?? poi?.latitude);
    byId(ids.poiLon).value = text(poi?.lon ?? poi?.longitude);
    byId(ids.poiRadius).value = text(poi?.triggerRadiusM ?? poi?.radiusM ?? poi?.radius ?? 25);
    setHidden(byId(ids.poiDelete), !poiId(poi));
    renderPoiMediaPreview(poi);
    updatePoiMediaStatus(poi);
  }

  function handleAudioSelection() {
    state.pendingAudioHandle = null;
    state.pendingAudioFile = byId(ids.poiAudio)?.files?.[0] || null;
    state.selectedMediaKey = null;
    if (byId(ids.poiAudio)) byId(ids.poiAudio).value = '';
    renderPoiMediaPreview();
    updatePoiMediaStatus();
  }

  async function handleImageSelection() {
    const files = Array.from(byId(ids.poiImages)?.files || []);
    for (const file of files) {
      state.pendingImages.push({
        file,
        handle: null,
        key: `pending-image-${ns.LocalRoutes.createPoiId()}`,
        previewUrl: objectUrlFor(file)
      });
    }
    state.selectedMediaKey = null;
    if (byId(ids.poiImages)) byId(ids.poiImages).value = '';
    renderPoiMediaPreview();
    updatePoiMediaStatus();
  }

  async function loadRoute(route) {
    const id = routeId(route);
    if (!id) return;
    if (state.currentRoute && (routeSource(route) !== state.currentSource || routeId(state.currentRoute) !== id)) {
      ns.RouteRecorder?.endEditing();
    }
    setStatus(ns.I18n.t("editor.route.loading"));
    state.currentSource = routeSource(route);

    if (state.currentSource === 'local') {
      const routePackage = ns.LocalRoutes.get(id);
      if (!routePackage) throw new Error(ns.I18n.t("editor.error.draft-missing"));
      state.currentRoute = {
        ...routePackage.route,
        id: routePackage.id,
        gpx: routePackage.gpx,
        _source: 'local'
      };
      if (byId(ids.dialog)?.open) ns.RouteRecorder?.beginEditing(id);
      state.pois = [...routePackage.pois].sort((left, right) => Number(left.sequence) - Number(right.sequence));
    } else {
      const payload = await readJson(`/routes/${encodeURIComponent(id)}`);
      const detail = payload.route || payload;
      state.currentRoute = { ...detail, _source: state.currentSource };
      state.pois = poiArray(detail);
    }

    state.currentPoi = null;
    fillRouteForm(state.currentRoute);
    renderPoiList();
    showRouteView();
    setStatus('');
  }

  function newRoute() {
    ns.RouteRecorder?.endEditing();
    state.currentSource = 'local';
    state.currentRoute = {
      id: '',
      name: '',
      description: '',
      gpx: ns.LocalRoutes.emptyGpx(ns.I18n.t("editor.new-route")),
      _source: 'local'
    };
    state.currentPoi = null;
    state.pois = [];
    fillRouteForm(state.currentRoute);
    renderPoiList();
    showRouteView();
    setStatus(ns.I18n.t("editor.draft-status"));
  }

  function formDataFromRoute(values) {
    const data = new FormData();
    const file = byId(ids.routeGpx)?.files?.[0];
    data.append('name', values.name);
    data.append('description', values.description);
    data.append('creator_id', state.currentRoute.creator_id || ns.LocalRoutes.creatorId());
    if (file) data.append('gpx', file);
    return data;
  }

  async function saveLocalRoute(values) {
    const file = byId(ids.routeGpx)?.files?.[0];
    let gpx = ns.LocalRoutes.get?.(routeId(state.currentRoute))?.gpx || state.currentRoute?.gpx || ns.LocalRoutes.emptyGpx(values.name);
    if (file) {
      gpx = await ns.LocalRoutes.readFileAsText(file);
      const importedPois = ns.LocalRoutes.parseWaypoints(gpx);
      if (!state.pois.length && importedPois.length) state.pois = importedPois;
    }

    gpx = ns.RouteRecorder?.editGpx(gpx, values.name) ?? gpx;
    const isNew = !routeId(state.currentRoute);
    const id = routeId(state.currentRoute) || ns.LocalRoutes.createRouteId();
    const saved = ns.LocalRoutes.save({
      id,
      gpx,
      route: {
        ...state.currentRoute,
        id,
        name: values.name,
        description: values.description
      },
      pois: state.pois
    });
    state.currentRoute = { ...saved.route, id: saved.id, gpx: saved.gpx, _source: 'local' };
    state.currentSource = 'local';
    if (isNew && byId(ids.dialog)?.open) ns.RouteRecorder?.beginEditing(saved.id);
    state.pois = saved.pois;
    await loadRoutes();
    await loadRoute({ id: saved.id, _source: 'local' });
    setStatus(ns.I18n.t("editor.saved"));
  }

  async function saveServerRoute(values) {
    const id = routeId(state.currentRoute);
    if (!id) throw new Error(ns.I18n.t("editor.error.create-locally"));
    const file = byId(ids.routeGpx)?.files?.[0];
    values = { ...values, creator_id: state.currentRoute.creator_id || ns.LocalRoutes.creatorId() };
    const path = `/routes/${encodeURIComponent(id)}`;
    const payload = file
      ? await sendForm(path, 'PUT', formDataFromRoute(values))
      : await sendJson(path, 'PUT', values);
    const saved = payload.route || payload;
    state.currentRoute = { ...saved, _source: state.currentSource };
    await loadRoutes();
    await loadRoute({ id, _source: state.currentSource });
    setStatus(ns.I18n.t("editor.saved"));
  }

  async function saveRoute() {
    const values = routeFromForm();
    if (!values.name) throw new Error(ns.I18n.t("editor.error.route-name"));
    if (state.currentSource === 'local') await saveLocalRoute(values);
    else await saveServerRoute(values);
  }

  function safeGpxFilename(name) {
    let base = text(name || 'wegwichtel-route')
      .normalize('NFKD')
      .replaceAll(/[^a-zA-Z0-9_-]+/g, '-');

    while (base.startsWith('-')) base = base.slice(1);
    while (base.endsWith('-')) base = base.slice(0, -1);

    base = base.slice(0, 80);
    return `${base || 'wegwichtel-route'}.gpx`;
  }

  function localRouteUploadForm(routePackage) {
    const data = new FormData();
    data.append('name', routePackage.route?.name || ns.I18n.t("editor.untitled-route"));
    data.append('description', routePackage.route?.description || '');
    data.append('creator_id', routePackage.route?.creator_id || ns.LocalRoutes.creatorId());
    const uploadGpx = ns.LocalRoutes.gpxForUpload(routePackage);
    const gpx = new Blob([uploadGpx], { type: 'application/gpx+xml' });
    data.append('gpx', gpx, safeGpxFilename(routePackage.route?.name));
    return data;
  }

  async function storedMediaBlob(media) {
    const blob = await ns.LocalRoutes.mediaBlob(media, { requestPermission: true });
    if (!blob) {
      throw new Error(ns.I18n.t("editor.error.send-file", { value1: media?.name || '' }).trim());
    }
    return blob;
  }

  async function uploadStoredMedia(path, fieldName, media, fallbackName, method = 'POST') {
    const blob = await storedMediaBlob(media);
    const data = new FormData();
    data.append(fieldName, blob, media.name || fallbackName);
    if (fieldName === 'picture') data.append('caption', media.caption || '');
    return sendForm(path, method, data);
  }

  function checkpointLocalUpload(routePackage) {
    const latest = ns.LocalRoutes.get(routePackage.id);
    // GPS samples may arrive while media requests are pending.
    if (latest) routePackage.gpx = latest.gpx;
    return ns.LocalRoutes.save(routePackage);
  }

  function submittedStatus(existing) {
    if (!existing) return 'removed';
    return existing.status === 'deleted' ? 'rejected' : null;
  }

  async function findSubmittedRoute(id) {
    try {
      const payload = await readJson(`/routes/${encodeURIComponent(id)}?includeDeleted=true`);
      return payload.route || payload;
    } catch (error) {
      if (error.status === 404) return null;
      throw error;
    }
  }

  function clearSubmittedReferences(routePackage) {
    routePackage.route.serverRouteId = null;
    routePackage.route.uploadedAt = null;
    for (const poi of routePackage.pois || []) {
      delete poi.serverPoiId;
      delete poi.serverAudio;
      for (const image of poi.images || []) delete image.serverPictureId;
    }
    checkpointLocalUpload(routePackage);
  }

  async function prepareServerRoute(routePackage) {
    const id = routePackage.route.serverRouteId;
    const replacedSubmission = Boolean(id || routePackage.route.submissionStatus);
    if (id) {
      const existing = await findSubmittedRoute(id);
      if (!existing || existing.status === 'deleted') {
        // Preserve the old trash entry; submit a new draft with fresh references.
        routePackage.route.submissionStatus = submittedStatus(existing);
        clearSubmittedReferences(routePackage);
      } else {
        if (existing.activatedAt || existing.activated_at) {
          throw new Error(ns.I18n.t("editor.read-only-hint"));
        }
        await sendForm(`/routes/${encodeURIComponent(id)}`, 'PUT', localRouteUploadForm(routePackage));
        return { id, previousPois: existing.pois || [] };
      }
    }
    const payload = await sendForm('/routes', 'POST', localRouteUploadForm(routePackage));
    const createdId = routeId(payload.route || payload);
    if (!createdId) throw new Error(ns.I18n.t("editor.error.send-route"));
    routePackage.route.serverRouteId = createdId;
    routePackage.route.submissionStatus = null;
    checkpointLocalUpload(routePackage);
    return { id: createdId, previousPois: [], recreated: replacedSubmission };
  }

  async function syncLocalPoi(base, poi, index, routePackage) {
    const payload = await sendJson(poi.serverPoiId ? `${base}/${poi.serverPoiId}` : base,
      poi.serverPoiId ? 'PUT' : 'POST', {
        description: poi.description || '', lat: poi.lat, lon: poi.lon, sequence: index,
        title: poi.title || ns.I18n.t("editor.station-number", { value1: index + 1 }),
        triggerRadiusM: poi.triggerRadiusM || 25
      });
    poi.serverPoiId = poiId(payload.poi || payload);
    if (!poi.serverPoiId) throw new Error(ns.I18n.t("editor.error.send-station", { value1: poi.title || '' }));
    checkpointLocalUpload(routePackage);
  }

  async function syncLocalAudio(mediaBase, poi, oldPoi, routePackage) {
    if (poi.audio) {
      await uploadStoredMedia(`${mediaBase}/audio`, 'audio', poi.audio, 'audio.bin',
        oldPoi?.audioUrl || poi.serverAudio ? 'PUT' : 'POST');
      poi.serverAudio = true;
      checkpointLocalUpload(routePackage);
    } else if (oldPoi?.audioUrl) {
      await sendDelete(`${mediaBase}/audio`);
      poi.serverAudio = false;
      checkpointLocalUpload(routePackage);
    }
  }

  async function removeMissingServerItems(previous, current, serverIdKey, base) {
    const retained = new Set(current.map(item => String(item[serverIdKey])));
    for (const item of previous) {
      if (!retained.has(String(item.id))) await sendDelete(`${base}/${item.id}`);
    }
  }

  async function syncLocalPictures(mediaBase, poi, oldPoi, routePackage) {
    const images = poi.images || [];
    for (const [index, image] of images.entries()) {
      const path = image.serverPictureId ? `${mediaBase}/pictures/${image.serverPictureId}` : `${mediaBase}/pictures`;
      const picture = await uploadStoredMedia(path, 'picture', image, `bild-${index + 1}.bin`,
        image.serverPictureId ? 'PUT' : 'POST');
      image.serverPictureId = (picture.picture || picture).id;
      if (!image.serverPictureId) throw new Error(ns.I18n.t("editor.error.send-file", { value1: image.name || '' }));
      checkpointLocalUpload(routePackage);
    }
    await removeMissingServerItems(oldPoi?.images || [], images, 'serverPictureId', `${mediaBase}/pictures`);
  }

  async function createServerRouteFromLocal(routePackage) {
    const { id, previousPois, recreated } = await prepareServerRoute(routePackage);
    const base = `/routes/${encodeURIComponent(id)}/pois`;
    const orderedPois = [...(routePackage.pois || [])]
      .sort((left, right) => Number(left.sequence) - Number(right.sequence));
    for (const [index, poi] of orderedPois.entries()) {
      await syncLocalPoi(base, poi, index, routePackage);
      const mediaBase = `${base}/${poi.serverPoiId}`;
      const oldPoi = previousPois.find(old => String(old.id) === String(poi.serverPoiId));
      await syncLocalAudio(mediaBase, poi, oldPoi, routePackage);
      await syncLocalPictures(mediaBase, poi, oldPoi, routePackage);
    }
    await removeMissingServerItems(previousPois, orderedPois, 'serverPoiId', base);
    return { id, recreated };
  }

  async function uploadLocalRoute() {
    if (state.currentSource !== 'local') throw new Error(ns.I18n.t("editor.error.submit-own-draft"));
    const values = routeFromForm();
    if (!values.name) throw new Error(ns.I18n.t("editor.error.route-name"));
    const uploadButton = byId(ids.routeUpload);
    setDisabled(uploadButton, true);
    try {
      await saveLocalRoute(values);
      setStatus(ns.I18n.t("editor.submitting"));
      const localId = routeId(state.currentRoute);
      const routePackage = ns.LocalRoutes.get(localId);
      if (!routePackage) throw new Error(ns.I18n.t("editor.error.draft-missing"));

      const { id: serverRouteId, recreated } = await createServerRouteFromLocal(routePackage);
      const uploadedAt = new Date().toISOString();
      const saved = ns.LocalRoutes.save({
        ...routePackage,
        route: {
          ...routePackage.route,
          serverRouteId,
          uploadedAt
        }
      });
      state.currentRoute = { ...saved.route, id: saved.id, gpx: saved.gpx, _source: 'local' };
      state.pois = saved.pois;
      fillRouteForm(state.currentRoute);
      await loadRoutes();
      setStatus(ns.I18n.t(recreated ? 'editor.resubmit-success' : 'editor.submit-success'));
    } finally {
      // Keep acknowledged server IDs even if a later media request failed.
      const latest = ns.LocalRoutes.get(routeId(state.currentRoute));
      if (latest) {
        state.currentRoute = { ...latest.route, id: latest.id, gpx: latest.gpx, _source: 'local' };
        state.pois = latest.pois;
        fillRouteForm(state.currentRoute);
      }
      setDisabled(uploadButton, false);
    }
  }

  function currentPosition() {
    if (ns.RouteRecorder?.routeId === routeId(state.currentRoute)) return ns.RouteRecorder.position;
    return typeof ns.App?.currentPosition === 'function' ? ns.App.currentPosition() : null;
  }

  function newPoi() {
    ns.GroupPoints?.release();
    releasePoiPreview();
    const position = currentPosition();
    const lat = position?.lat ?? null;
    const lon = position?.lon ?? null;

    const accuracy = Number(position?.accuracy);
    state.currentPoi = null;
    state.groupDeletions = [];
    state.groupDeletePoint = false;
    const identifier = state.currentSource === 'local' ? nextLocalPoiId() : null;
    fillPoiForm({
      ...(identifier == null ? {} : { id: identifier }),
      lat,
      lon,
      triggerRadiusM: Number.isFinite(accuracy) && accuracy > 0 ? accuracy : 25
    });
    byId(ids.poiFormTitle).textContent = ns.I18n.t("editor.add-station");
    showPoiView();
  }

  async function editPoi(poi) {
    if (!poi) return;
    releasePoiPreview();
    let draft;
    if (state.currentSource === 'group' && ns.GroupPoints) {
      const opened = await ns.GroupPoints.begin(routeId(state.currentRoute), poi);
      if (!opened) return;
      poi = opened.poi;
      draft = opened.draft;
    }
    state.groupDeletions = draft?.media?.deletions || [];
    state.groupDeletePoint = Boolean(draft?.media?.deletePoint);
    state.currentPoi = poi;
    fillPoiForm(draft ? { ...poi, ...draft.values } : poi);
    if (draft) {
      state.pendingAudioFile = draft.media?.audio || null;
      state.pendingImages = (draft.media?.images || []).map(file => ({ file, key: `pending-image-${ns.LocalRoutes.createPoiId()}`, previewUrl: objectUrlFor(file) }));
      const hiddenImages = new Set(state.groupDeletions.map(item => item.path));
      state.currentPoi = { ...poi, images: (poi.images || []).filter(image => !hiddenImages.has(`pictures/${image.id}`)),
        ...(hiddenImages.has('audio') ? { audioUrl: null } : {}) };
      renderPoiMediaPreview();
      updatePoiMediaStatus();
      setStatus(ns.I18n.t(state.groupDeletePoint ? 'point-locks.delete-restored' : 'point-locks.restored'));
    }
    byId(ids.poiFormTitle).textContent = ns.I18n.t("editor.edit-station");
    showPoiView();
    if (state.currentSource !== 'local') return true;
    const requestGeneration = poiMediaGeneration;
    const hydrated = await ns.LocalRoutes.getPoiWithMedia(routeId(state.currentRoute), poi.id, { requestPermission: true });
    if (requestGeneration !== poiMediaGeneration || state.currentPoi !== poi) {
      ns.LocalRoutes.releasePoiMedia(hydrated);
      return;
    }
    if (!hydrated) return;
    previewPoi = hydrated;
    state.currentPoi = hydrated;
    // Preserve any text edits and newly selected files while existing previews load.
    renderPoiMediaPreview();
    updatePoiMediaStatus();
  }

  async function mediaFromLocalForm(existingPoi, poiIdentifier) {
    const routeIdentifier = routeId(state.currentRoute);
    if (!routeIdentifier) throw new Error(ns.I18n.t("editor.error.save-route-first"));

    const storedNow = [];
    const replacedAfterSave = [];
    let audio = existingPoi?.audio || null;

    if (state.pendingAudioFile) {
      const mediaId = `${poiIdentifier}-audio`;
      const storedAudio = await ns.LocalRoutes.storeMediaFile(
        routeIdentifier,
        poiIdentifier,
        'audio',
        mediaId,
        state.pendingAudioFile,
        state.pendingAudioHandle
      );
      storedNow.push(storedAudio);
      if (audio) replacedAfterSave.push(audio);
      audio = storedAudio;
    }

    const images = [...(existingPoi?.images || [])];
    for (const pending of state.pendingImages) {
      const mediaId = `${poiIdentifier}-image-${ns.LocalRoutes.createPoiId()}`;
      const image = await ns.LocalRoutes.storeMediaFile(
        routeIdentifier,
        poiIdentifier,
        'image',
        mediaId,
        pending.file,
        pending.handle
      );
      images.push({ ...image, caption: '' });
      storedNow.push(image);
    }
    return { audio, images, storedNow, replacedAfterSave };
  }

  async function persistLocalCurrentRoute() {
    const id = routeId(state.currentRoute);
    if (!id) throw new Error(ns.I18n.t("editor.error.save-route-first"));
    const currentPoiId = poiId(state.currentPoi);
    const saved = ns.LocalRoutes.save({
      id,
      gpx: ns.LocalRoutes.get?.(routeId(state.currentRoute))?.gpx || state.currentRoute.gpx,
      route: state.currentRoute,
      pois: state.pois
    });
    const previousPoi = state.currentPoi;
    state.currentRoute = { ...saved.route, id: saved.id, gpx: saved.gpx, _source: 'local' };
    state.pois = saved.pois;
    state.currentPoi = currentPoiId
      ? state.pois.find(poi => poiId(poi) === currentPoiId) || null
      : null;
    if (state.currentPoi && previousPoi) {
      state.currentPoi = { ...state.currentPoi, audio: previousPoi.audio, images: previousPoi.images };
    }
    return saved;
  }

  async function saveLocalPoi(values) {

    const currentId = numericPoiId(byId(ids.poiId).value);
    const identifier = currentId ?? nextLocalPoiId();
    byId(ids.poiId).value = String(identifier);
    const existing = state.pois.find(poi => numericPoiId(poi?.id ?? poi?.poiId) === identifier) || state.currentPoi;
    const media = await mediaFromLocalForm(existing, identifier);
    const savedPoi = {
      ...existing,
      ...values,
      audio: media.audio,
      images: media.images,
      id: identifier,
      sequence: existing?.sequence ?? state.pois.length
    };
    const index = state.pois.findIndex(poi => numericPoiId(poi?.id ?? poi?.poiId) === identifier);
    if (index >= 0) state.pois[index] = savedPoi;
    else state.pois.push(savedPoi);

    try {
      await persistLocalCurrentRoute();
    } catch (error) {
      await Promise.allSettled(media.storedNow.map(ns.LocalRoutes.removeMedia));
      throw error;
    }
    await Promise.allSettled(media.replacedAfterSave.map(ns.LocalRoutes.removeMedia));
    resetPendingMedia();
    setStatus(ns.I18n.t("editor.station-saved-with-media"));
    await loadRoute({ id: routeId(state.currentRoute), _source: 'local' });
  }

  async function uploadOne(path, fieldName, file, method = 'POST') {
    const data = new FormData();
    data.append(fieldName, file);
    return sendForm(path, method, data);
  }

  async function uploadPoiMedia(currentRouteId, currentPoiId) {
    const basePath = `/routes/${encodeURIComponent(currentRouteId)}/pois/${encodeURIComponent(currentPoiId)}`;
    if (state.pendingAudioFile) {
      const method = existingAudioUrl(state.currentPoi) ? 'PUT' : 'POST';
      await uploadOne(`${basePath}/audio`, 'audio', state.pendingAudioFile, method);
      if (state.currentSource === 'group') { state.pendingAudioFile = null; await rememberGroupPoint(poiFromForm(), currentPoiId); }
    }
    for (const pending of state.pendingImages) {
      await uploadOne(`${basePath}/pictures`, 'picture', pending.file);
      if (state.currentSource === 'group') {
        state.pendingImages = state.pendingImages.filter(item => item !== pending);
        releasePendingPreview(pending);
        await rememberGroupPoint(poiFromForm(), currentPoiId);
      }
    }
  }

  async function rememberGroupPoint(values, identifier = byId(ids.poiId).value || 'new') {
    return ns.GroupPoints.remember(state.currentRoute, identifier, values, {
      audio: state.pendingAudioFile, images: state.pendingImages.map(item => item.file), deletions: state.groupDeletions, deletePoint: state.groupDeletePoint
    });
  }

  async function prepareGroupPoint(values, currentPoiId) {
    const draft = await rememberGroupPoint(values);
    if (!currentPoiId) return true;
    try {
      const prepared = await ns.GroupPoints.prepare(draft);
      if (prepared) {
        state.groupDeletions = draft.media.deletions;
        state.currentPoi = prepared.poi;
        return true;
      }
    } catch { /* The complete intent was persisted before trying to acquire the point. */ }
    setStatus(ns.I18n.t('point-locks.saved-device'));
    return false;
  }

  async function saveGroupPointActions(currentRouteId, currentPoiId, saved, values) {
    const savedPoiId = poiId(saved) || currentPoiId;
    if (!currentPoiId) {
      byId(ids.poiId).value = savedPoiId;
      state.currentPoi = saved;
      // Persist the acknowledged ID before any further network request.
      await rememberGroupPoint(values, savedPoiId);
      await ns.GroupPoints.remove(currentRouteId, 'new');
      await ns.GroupPoints.acceptNew(currentRouteId, saved);
    }
    for (const deletion of state.groupDeletions) {
      await sendDelete(`/routes/${currentRouteId}/pois/${savedPoiId}/${deletion.path}`);
      state.groupDeletions = state.groupDeletions.filter(item => item !== deletion);
      await rememberGroupPoint(values, savedPoiId);
    }
  }

  async function saveServerPoi(values) {
    if (state.currentSource === 'group' && state.groupDeletePoint) return deleteCurrentPoi();
    const currentRouteId = routeId(state.currentRoute);
    if (!currentRouteId) throw new Error(ns.I18n.t("editor.error.save-route-first"));
    const currentPoiId = byId(ids.poiId).value;
    if (state.currentSource === 'group' && ns.GroupPoints && !await prepareGroupPoint(values, currentPoiId)) return;
    const path = currentPoiId
      ? `/routes/${encodeURIComponent(currentRouteId)}/pois/${encodeURIComponent(currentPoiId)}`
      : `/routes/${encodeURIComponent(currentRouteId)}/pois`;
    const method = currentPoiId ? 'PUT' : 'POST';
    const payload = await sendJson(path, method, values);
    const saved = payload.poi || payload;
    const savedPoiId = poiId(saved) || currentPoiId;
    if (state.currentSource === 'group' && ns.GroupPoints) await saveGroupPointActions(currentRouteId, currentPoiId, saved, values);
    if (savedPoiId) await uploadPoiMedia(currentRouteId, savedPoiId);
    if (state.currentSource === 'group' && ns.GroupPoints) await ns.GroupPoints.remove(currentRouteId, savedPoiId);
    setStatus(ns.I18n.t("editor.station-saved"));
    await loadRoute({ id: currentRouteId, _source: state.currentSource });
  }

  let pointSaveInProgress = false;
  async function savePoi() {
    if (pointSaveInProgress) return;
    pointSaveInProgress = true;
    byId(ids.dialog).inert = true;
    try { await savePoiContents(); } finally { pointSaveInProgress = false; byId(ids.dialog).inert = false; }
  }

  async function savePoiContents() {
    const values = poiFromForm();
    if (!values.title) throw new Error(ns.I18n.t("editor.error.station-name"));
    if (state.currentSource === 'local') await saveLocalPoi(values);
    else {
      try { await saveServerPoi(values); }
      catch (error) {
        if (state.currentSource !== 'group' || !ns.GroupPoints) throw error;
        // Retain all unacknowledged files and intents, even when the lock changed during upload.
        await rememberGroupPoint(values);
        setStatus(ns.I18n.t('point-locks.saved-device'));
      }
    }
  }

  function updateCurrentPoi(updatedPoi) {
    const identifier = poiId(updatedPoi);
    const index = state.pois.findIndex(poi => poiId(poi) === identifier);
    if (index >= 0) state.pois[index] = updatedPoi;
    state.currentPoi = updatedPoi;
  }

  async function removePendingMedia(kind, mediaIndex) {
    if (kind === 'audio') {
      state.pendingAudioFile = null;
      state.pendingAudioHandle = null;
    } else {
      const index = Number.parseInt(mediaIndex, 10);
      if (Number.isInteger(index)) {
        const [removed] = state.pendingImages.splice(index, 1);
        releasePendingPreview(removed);
      }
    }
    state.selectedMediaKey = null;
    renderPoiMediaPreview();
    updatePoiMediaStatus();
  }

  async function removeExistingLocalMedia(kind, mediaIndex) {
    if (!state.currentPoi) return;
    const updated = { ...state.currentPoi };
    let removedMedia = null;
    if (kind === 'audio') {
      removedMedia = updated.audio;
      updated.audio = null;
    } else {
      const index = Number.parseInt(mediaIndex, 10);
      updated.images = [...(state.currentPoi.images || [])];
      if (Number.isInteger(index)) {
        [removedMedia] = updated.images.splice(index, 1);
      }
    }
    updateCurrentPoi(updated);
    await persistLocalCurrentRoute();
    if (removedMedia) {
      ns.LocalRoutes.releasePoiMedia({ audio: removedMedia });
      await ns.LocalRoutes.removeMedia(removedMedia);
    }
    state.selectedMediaKey = null;
    renderPoiMediaPreview();
    updatePoiMediaStatus();
    setStatus(kind === 'audio' ? ns.I18n.t("editor.audio.removed") : ns.I18n.t("editor.image-removed"));
  }

  async function removeExistingServerMedia(kind, mediaId) {
    const currentRouteId = routeId(state.currentRoute);
    const currentPoiId = poiId(state.currentPoi);
    if (!currentRouteId || !currentPoiId) throw new Error(ns.I18n.t("editor.error.station-unsaved"));
    const basePath = `/routes/${encodeURIComponent(currentRouteId)}/pois/${encodeURIComponent(currentPoiId)}`;
    const updated = { ...state.currentPoi };

    if (kind === 'audio') {
      if (state.currentSource === 'group') state.groupDeletions.push({ path: 'audio' });
      else await sendDelete(`${basePath}/audio`);
      updated.audio = null;
      updated.audioUrl = null;
      updated.audio_path = null;
    } else {
      if (!mediaId) throw new Error(ns.I18n.t("editor.error.remove-image"));
      if (state.currentSource === 'group') state.groupDeletions.push({ path: `pictures/${encodeURIComponent(mediaId)}` });
      else await sendDelete(`${basePath}/pictures/${encodeURIComponent(mediaId)}`);
      updated.images = (state.currentPoi.images || []).filter(image => text(image.id) !== text(mediaId));
    }

    updateCurrentPoi(updated);
    state.selectedMediaKey = null;
    renderPoiMediaPreview();
    updatePoiMediaStatus();
    if (state.currentSource === 'group') {
      await rememberGroupPoint(poiFromForm());
      setStatus(ns.I18n.t('point-locks.deletion-staged'));
    } else setStatus(kind === 'audio' ? ns.I18n.t("editor.audio.removed") : ns.I18n.t("editor.image-removed"));
  }

  async function removeMedia(control) {
    const kind = control.dataset.mediaKind;
    const source = control.dataset.mediaSource;
    if (source === 'pending') {
      await removePendingMedia(kind, control.dataset.mediaIndex);
      return;
    }
    if (state.currentSource === 'local') {
      await removeExistingLocalMedia(kind, control.dataset.mediaIndex);
      return;
    }
    await removeExistingServerMedia(kind, control.dataset.mediaId);
  }

  async function mediaPreviewAction(event) {
    const control = event.target.closest('[data-editor-action]');
    const action = control?.dataset.editorAction;
    if (action === 'select-media') {
      const key = control.dataset.mediaKey;
      state.selectedMediaKey = state.selectedMediaKey === key ? null : key;
      renderPoiMediaPreview();
      return;
    }
    if (action === 'remove-media') await removeMedia(control);
  }

  async function deleteCurrentPoi() {
    const currentRouteId = routeId(state.currentRoute);
    const currentPoiId = poiId(state.currentPoi);
    if (!currentRouteId || !currentPoiId) return;

    if (state.currentSource === 'local') {
      const removedPoi = state.currentPoi;
      state.pois = state.pois
        .filter(poi => poiId(poi) !== currentPoiId)
        .map((poi, sequence) => ({ ...poi, sequence }));
      state.currentPoi = null;
      await persistLocalCurrentRoute();
      const removedMedia = [removedPoi?.audio, ...(removedPoi?.images || [])].filter(Boolean);
      await Promise.allSettled(removedMedia.map(ns.LocalRoutes.removeMedia));
      renderPoiList();
      showRouteView();
      setStatus(ns.I18n.t("editor.station-removed-and-saved"));
      return;
    }

    if (state.currentSource === 'group' && ns.GroupPoints) {
      state.groupDeletePoint = true;
      const draft = await rememberGroupPoint(poiFromForm());
      try {
        if (!await ns.GroupPoints.prepare(draft)) { setStatus(ns.I18n.t('point-locks.saved-device')); return; }
        await sendDelete(`/routes/${currentRouteId}/pois/${currentPoiId}`);
        await ns.GroupPoints.remove(currentRouteId, currentPoiId);
      } catch { setStatus(ns.I18n.t('point-locks.saved-device')); return; }
    } else await sendDelete(`/routes/${encodeURIComponent(currentRouteId)}/pois/${encodeURIComponent(currentPoiId)}`);
    await loadRoute({ id: currentRouteId, _source: state.currentSource });
    setStatus(ns.I18n.t("editor.station-removed"));
  }

  function reorderPois(index, offset) {
    const target = index + offset;
    if (target < 0 || target >= state.pois.length) return false;
    const reordered = [...state.pois];
    [reordered[index], reordered[target]] = [reordered[target], reordered[index]];
    state.pois = reordered.map((poi, sequence) => ({ ...poi, sequence }));
    renderPoiList();
    return true;
  }

  function swapPois(index, offset) {
    if (!reorderPois(index, offset)) return;
    guarded(savePoiOrder);
  }

  async function saveGroupPoiOrder(currentRouteId) {
    let deferred = false;
    for (const [index, poi] of state.pois.entries()) {
      if (await ns.GroupPoints.read(currentRouteId, poi.id)) { deferred = true; continue; }
      const values = { ...poi, sequence: index };
      try {
        const opened = await ns.GroupPoints.begin(currentRouteId, poi);
        await ns.GroupPoints.remember(state.currentRoute, poi.id, { ...(opened?.poi || values), sequence: index }, { images: [], audio: null, deletions: [] });
        if (!opened) { deferred = true; continue; }
        await sendJson(`/routes/${currentRouteId}/pois/${poi.id}`, 'PUT', { sequence: index, sortOrder: index });
        await ns.GroupPoints.remove(currentRouteId, poi.id);
      } catch {
        await ns.GroupPoints.remember(state.currentRoute, poi.id, values, { images: [], audio: null, deletions: [] });
        deferred = true;
      } finally { await ns.GroupPoints.release(); }
    }
    setStatus(ns.I18n.t(deferred ? 'point-locks.saved-device' : 'editor.order.saved'));
  }

  async function savePoiOrder() {
    const currentRouteId = routeId(state.currentRoute);
    if (!currentRouteId) return;
    if (state.currentSource === 'local') {
      await persistLocalCurrentRoute();
      setStatus(ns.I18n.t("editor.station-order-saved"));
      return;
    }
    if (state.currentSource === 'group' && ns.GroupPoints) return saveGroupPoiOrder(currentRouteId);
    const jobs = state.pois.map((poi, index) => {
      const currentPoiId = poiId(poi);
      if (!currentPoiId) return null;
      const path = `/routes/${encodeURIComponent(currentRouteId)}/pois/${encodeURIComponent(currentPoiId)}`;
      return sendJson(path, 'PUT', { ...poi, sequence: index, sortOrder: index });
    }).filter(Boolean);
    await Promise.all(jobs);
    setStatus(ns.I18n.t("editor.order.saved"));
  }

  function routeForItem(target) {
    const item = target.closest('[data-route-id]');
    const id = item?.dataset.routeId;
    const source = item?.dataset.routeSource;
    return state.routes.find(route => routeId(route) === id && routeSource(route) === source);
  }

  function poiForItem(target) {
    const item = target.closest('[data-poi-id]');
    return state.pois.find(poi => poiId(poi) === item?.dataset.poiId);
  }

  function poiIndexForItem(target) {
    const item = target.closest('[data-poi-id]');
    return state.pois.findIndex(poi => poiId(poi) === item?.dataset.poiId);
  }

  async function deleteRouteFromList(route) {
    const id = routeId(route);
    if (!id || routeSource(route) !== 'local') return;

    await ns.LocalRoutes.remove(id);

    if (routeId(state.currentRoute) === id && state.currentSource === routeSource(route)) {
      state.currentRoute = null;
      state.currentSource = null;
      state.currentPoi = null;
      state.pois = [];
    }

    await loadRoutes();
    showListView();
    setStatus(ns.I18n.t("editor.route-deleted"));
  }

  async function routeListAction(event) {
    const control = event.target.closest('[data-editor-action]');
    const action = control?.dataset.editorAction;
    const route = routeForItem(event.target);
    if (!route) return;

    if (action === 'share-route') {
      if (shareInProgress) return;
      shareInProgress = true;
      try {
        const code = await ns.Groups.chooseCode();
        if (!code) return;
        let sourceId = routeId(route);
        if (routeSource(route) === 'local') {
          if (!globalThis.confirm(ns.I18n.t('groups.upload-confirm'))) return;
          await loadRoute(route);
          await uploadLocalRoute();
          sourceId = state.currentRoute.serverRouteId;
        }
        await ns.Groups.share(sourceId, code);
      } finally { shareInProgress = false; }
      return;
    }
    if (action === 'edit-route') {
      await loadRoute(route);
      return;
    }
    if (action === 'delete-route' && routeSource(route) === 'local') {
      await deleteRouteFromList(route);
    }
  }

  async function deletePoiFromList(poi) {
    if (!poi) return;
    if (state.currentSource === 'group') {
      if (!await editPoi(poi)) return;
      state.groupDeletePoint = true;
      await savePoi();
      return;
    }
    state.currentPoi = poi;
    await deleteCurrentPoi();
  }

  async function poiListAction(event) {
    const action = event.target.closest('[data-editor-action]')?.dataset.editorAction;
    if (action === 'edit-poi') {
      await editPoi(poiForItem(event.target));
      return;
    }
    if (action === 'delete-poi') {
      await deletePoiFromList(poiForItem(event.target));
      return;
    }
    if (action === 'move-poi-up') {
      swapPois(poiIndexForItem(event.target), -1);
      return;
    }
    if (action === 'move-poi-down') swapPois(poiIndexForItem(event.target), 1);
  }

  async function guarded(action) {
    try {
      await action();
      await ns.StorageUsage?.refresh();
    } catch (error) {
      ns.StorageUsage?.reportError(error);
      setStatus(ns.UserMessages?.error(error) || ns.I18n.t("editor.error.generic"), true);
    }
  }

  function bind() {
    for (const eventName of ['input', 'change', 'pointerdown', 'keydown']) {
      byId(ids.poiForm)?.addEventListener(eventName, () => {
        if (state.currentSource === 'group') ns.GroupPoints?.noteActivity?.();
      });
    }
    document.addEventListener('wegwichtel:point-lock-lost', () => {
      if (state.currentSource === 'group') setStatus(ns.I18n.t('point-locks.lost'));
    });
    for (const eventName of ['cancel', 'close']) {
      byId(ids.dialog)?.addEventListener(eventName, event => {
        if (pointSaveInProgress && eventName === 'cancel') { event.preventDefault(); return; }
        releasePoiPreview();
        ns.GroupPoints?.release();
        ns.RouteRecorder?.endEditing();
      });
    }
    activate(byId(ids.button), () => guarded(openEditor));
    activate(byId(ids.close), closeEditor);
    activate(byId(ids.newRoute), newRoute);
    activate(byId(ids.routeBack), () => { showListView(); guarded(loadRoutes); });
    activate(byId(ids.routeUpload), () => guarded(uploadLocalRoute));
    activate(byId(ids.rightsOpen), () => ns.LegalUi?.open('terms'));
    activate(byId(ids.addPoi), newPoi);
    activate(byId(ids.poiAudioAdd), () => guarded(() => chooseMedia('audio', ids.poiAudio)));
    activate(byId(ids.poiImagesAdd), () => guarded(() => chooseMedia('image', ids.poiImages)));
    byId(ids.poiAudio)?.addEventListener('change', handleAudioSelection);
    byId(ids.poiImages)?.addEventListener('change', () => guarded(handleImageSelection));
    activate(byId(ids.poiMediaPreview), event => guarded(() => mediaPreviewAction(event)));
    activate(byId(ids.poiDelete), () => {
      if (state.currentSource === 'group') { state.groupDeletePoint = true; guarded(savePoi); }
      else guarded(deleteCurrentPoi);
    });
    activate(byId(ids.poiCancel), showRouteView);
    activate(byId(ids.routeList), event => guarded(() => routeListAction(event)));
    activate(byId(ids.poiList), event => guarded(() => poiListAction(event)));
    submit(byId(ids.routeForm), () => guarded(saveRoute));
    submit(byId(ids.poiForm), () => guarded(savePoi));
  }

  function editorApi() {
    return Object.freeze({
      close: closeEditor,
      open: openEditor,
      openNewLocalRoute,
      openGroup: async route => {
        await openEditor();
        await loadRoute({ ...route, _source: 'group' });
      },
      openPendingPoint: async draft => {
        await openEditor();
        try { await loadRoute({ ...draft.route, _source: 'group' }); }
        catch {
          state.currentSource = 'group';
          state.currentRoute = { ...draft.route, _source: 'group' };
          state.pois = draft.basePoi ? [draft.basePoi] : [];
          fillRouteForm(state.currentRoute); renderPoiList(); showRouteView();
        }
        if (draft.poiId === 'new') {
          newPoi();
          fillPoiForm(draft.values);
          state.pendingAudioFile = draft.media?.audio || null;
          state.pendingImages = (draft.media?.images || []).map(file => ({ file, key: `pending-image-${ns.LocalRoutes.createPoiId()}`, previewUrl: objectUrlFor(file) }));
          renderPoiMediaPreview(); updatePoiMediaStatus();
        } else await editPoi(draft.basePoi || { id: draft.poiId });
      },
      refresh: loadRoutes
    });
  }

  function init() {
    bind();
    ns.EditorUi = editorApi();
  }

  ready(init);
}(globalThis.Wegwichtel));