/**
 * rhinoBridge.js — Kommunikation React ↔ Rhino/Python
 * Lange Payloads werden in Chunks <700 Zeichen aufgeteilt (document.title-Limit).
 */
const CHUNK_SIZE = 700

let _queue = []
let _busy  = false

function _flush() {
  if (_busy || _queue.length === 0) return
  _busy = true
  document.title = 'RHINOMSG::' + _queue.shift()
  setTimeout(() => { _busy = false; _flush() }, 80)
}

// Mac WKWebView -> .NET String-Bruecke kann mit non-ASCII-Bytes haengen
// (Umlaute wie A-Umlaut/O-Umlaut/U-Umlaut -> "Unable to translate bytes from specified code page").
// Vor Transport ASCII-eskapen, Python's json.loads dekodiert die \uXXXX wieder.
const _NON_ASCII = /[^\x00-\x7f]/g
function _asciiEscape(s) {
  return s.replace(_NON_ASCII, (c) =>
    '\\u' + ('0000' + c.charCodeAt(0).toString(16)).slice(-4))
}

export function send(type, payload = {}) {
  if (!window.RHINO_MODE) { console.log('[Bridge] →', type, payload); return }
  const json = _asciiEscape(JSON.stringify({ type, payload }))
  if (json.length <= CHUNK_SIZE) {
    _queue.push(json)
  } else {
    const total = Math.ceil(json.length / CHUNK_SIZE)
    for (let i = 0; i < total; i++) {
      _queue.push(_asciiEscape(JSON.stringify({
        _chunk: { i, n: total },
        d: json.slice(i * CHUNK_SIZE, (i + 1) * CHUNK_SIZE),
      })))
    }
  }
  _flush()
}

const _handlers = {}
export function onMessage(type, handler) { _handlers[type] = handler }

if (typeof window !== 'undefined') {
  window.onRhinoMessage = (data) => {
    const h = _handlers[data.type]
    if (h) h(data.payload)
    else console.log('[Bridge] ←', data.type, data.payload)
  }
}

export function notifyReady() {
  const tryReady = () => {
    if (window.RHINO_MODE) send('READY', {})
    else setTimeout(tryReady, 50)
  }
  tryReady()
}

export function applyAll(zeichnungsebenen, ebenen) {
  send('APPLY', { zeichnungsebenen, ebenen })
}

export function setLayerVisibility(code, visible) {
  send('LAYER_VISIBILITY', { code, visible })
}

export function setLayerLock(code, locked) {
  send('LAYER_LOCK', { code, locked })
}

export function setLayerStyle(code, color, lw) {
  send('LAYER_STYLE', { code, color, lw })
}

export function setActiveZeichnungsebene(z) {
  send('SET_ACTIVE', { id: z.id, name: z.name, isGeschoss: !!z.isGeschoss, okff: z.okff ?? null })
}

export function setActiveEbene(code) {
  send('SET_ACTIVE_LAYER', { code })
}

export function deleteEbene(code, moveTo) {
  send('DELETE_EBENE', { code, moveTo: moveTo || null })
}

export function moveSelectionToEbene(code) {
  send('MOVE_SELECTION_TO_LAYER', { code })
}

export function setClippingEnabled(enabled) {
  send('SET_CLIPPING', { enabled: !!enabled })
}

// --- Ausschnitte ---
export function listAusschnitte()                    { send('LIST', {}) }
export function saveAusschnitt(name)                 { send('SAVE',   { name }) }
export function updateAusschnitt(id)                 { send('UPDATE', { id }) }
export function restoreAusschnitt(id)                { send('RESTORE', { id }) }
export function applyAusschnittToDetail(id)          { send('APPLY_TO_DETAIL', { id }) }
export function renameAusschnitt(id, name)           { send('RENAME', { id, name }) }
export function deleteAusschnitt(id)                 { send('DELETE', { id }) }
export function setAusschnittFolder(id, folder)      { send('SET_FOLDER', { id, folder }) }
export function setAusschnittScale(id, scale)        { send('SET_SCALE',  { id, scale }) }
export function duplicateAusschnitt(id)              { send('DUPLICATE', { id }) }
export function addAusschnittFolder(name)            { send('ADD_FOLDER',    { name }) }
export function removeAusschnittFolder(name)         { send('REMOVE_FOLDER', { name }) }
export function getAusschnittLayers(id)              { send('GET_LAYERS',    { id }) }
export function updateAusschnittLayers(id, layers)   { send('UPDATE_LAYERS', { id, layers }) }
export function saveLayerPreset(name, layers)        { send('SAVE_PRESET',   { name, layers }) }
export function deleteLayerPreset(name)              { send('DELETE_PRESET', { name }) }
export function openAusschnittSettings(id)           { send('OPEN_SETTINGS', { id }) }

// --- Gestaltung-Panel ---
export function requestSelection() {
  send('GET_SELECTION', {})
}

export function setColorSource(source, color) {
  send('SET_COLOR_SOURCE', { source, color: color || null })
}

export function setLwSource(source, lw) {
  send('SET_LW_SOURCE', { source, lw: lw == null ? null : Number(lw) })
}

export function setLinetypeSource(source, name) {
  send('SET_LINETYPE_SOURCE', { source, name: name || null })
}

export function setLinetypeScale(scale) {
  send('SET_LINETYPE_SCALE', { scale: scale == null ? null : Number(scale) })
}

export function setFill(enabled, source, color, pattern, scale, rotation) {
  send('SET_FILL', {
    enabled:  !!enabled,
    source:   source || 'object',
    color:    color   || null,
    pattern:  pattern || null,
    scale:    scale    == null ? null : Number(scale),
    rotation: rotation == null ? null : Number(rotation),
  })
}

// --- Massstab-Panel ---
export function requestMassstab()        { send('REQUEST_STATE', {}) }
export function setMassstab(ratio)       { send('SET_SCALE',     { ratio: Number(ratio) }) }
export function zoomOneToOne()           { send('ZOOM_ONE_TO_ONE', {}) }
export function zoomExtents()            { send('ZOOM_EXTENTS',   {}) }
export function zoomSelection()          { send('ZOOM_SELECTION', {}) }
export function setMassstabDpi(dpi)      { send('SET_DPI',        { dpi: Number(dpi) }) }
export function detectMassstabDpi()      { send('DETECT_DPI',     {}) }
export function setShowLineweights(on)   { send('SET_LINEWEIGHTS',{ enabled: !!on }) }

// --- Werkzeuge-Panel ---
export function runRhinoCommand(cmd)     { send('RUN', { cmd }) }

// --- Oberleiste-Panel ---
export function setView(view)            { send('SET_VIEW',         { view }) }
export function setDisplayMode(name)     { send('SET_DISPLAY_MODE', { name }) }
export function toggleOrtho(on)          { send('TOGGLE_ORTHO',     { enabled: !!on }) }
export function toggleGridSnap(on)       { send('TOGGLE_GRID_SNAP', { enabled: !!on }) }
export function toggleOsnap(on)          { send('TOGGLE_OSNAP',     { enabled: !!on }) }
export function toggleOverrides(on)      { send('TOGGLE_OVERRIDES', { enabled: !!on }) }
export function setOverridesPreset(name) { send('SET_OVERRIDES_PRESET', { name: name || null }) }
export function saveOverridesPreset(name) { send('SAVE_OVERRIDES_PRESET', { name }) }
export function openOverridesPanel()     { send('OPEN_OVERRIDES_PANEL', {}) }
export function openKameraPanel()        { send('OPEN_KAMERA_PANEL', {}) }
export function openElementeUebersicht() { send('OPEN_ELEMENTE_UEBERSICHT', {}) }
export function openElementeProperties() { send('OPEN_ELEMENTE_PROPERTIES', {}) }
export function setDarstellung(d) { send('SET_DARSTELLUNG', { darstellung: d || '' }) }
// Anordnen — 2D-Z-Stack via Rhino-DisplayOrder. dir: 'front'|'forward'|'backward'|'back'
export function arrangeSelection(dir) { send('ARRANGE', { dir }) }
// Referenzlinien-Layer (Code 19) on/off — Shortcut zur Layer-Sichtbarkeit
// damit der User nicht durchs Ebenen-Panel muss. Layer bleibt erhalten,
// Ausschnitte speichern den State automatisch mit.
export function toggleReferenzlinien(visible) {
  send('TOGGLE_REFERENZLINIEN', { visible: !!visible })
}
// Schnitt/Ansicht — interaktiver 2-Punkt-Pick im Rhino-Viewport. Erzeugt
// eine neue Zeichnungsebene type=schnitt + 2D-Plan-Symbol + aktiviert sie.
// opts: { cutAtLine: bool, depthBack: m, heightMin: m, heightMax: m, namePrefix }
export function createSchnitt(opts = {}) {
  send('CREATE_SCHNITT', {
    cutAtLine: true, depthBack: 8.0, heightMin: -1.0, heightMax: 12.0,
    ...opts,
  })
}
export function deleteSchnitt(id) { send('DELETE_SCHNITT', { id }) }
export function saveOeffStyle(name, settings) {
  send('SAVE_OEFF_STYLE', { name, settings })
}
export function deleteOeffStyle(id) { send('DELETE_OEFF_STYLE', { id }) }
export function setSectionStyle(enabled, source, color, pattern, scale, rotation) {
  send('SET_SECTION_STYLE', { enabled, source, color, pattern, scale, rotation })
}
export function openAbout()              { send('OPEN_ABOUT', {}) }
export function createText()             { send('CREATE_TEXT', {}) }
export function setTextSettings(settings) { send('SET_TEXT_SETTINGS', { settings }) }
export function applyTextStyle(id)       { send('APPLY_TEXT_STYLE', { id }) }
export function saveTextStyle(name)      { send('SAVE_TEXT_STYLE',  { name }) }
export function deleteTextStyle(id)      { send('DELETE_TEXT_STYLE', { id }) }

// --- Masse (in Oberleiste + Satellite-Fenster MasseSettings) ---
// Topbar: aktives Mass setzen + Settings-Fenster oeffnen
export function setMasseActive(id)       { send('SET_MASSE_ACTIVE',     { id }) }
export function openMasseSettings()      { send('OPEN_MASSE_SETTINGS',  {}) }
// MasseSettings-Fenster: eigene Bridge (Topics ohne MASSE_ prefix)
export function masseSetActive(id)       { send('SET_ACTIVE',           { id }) }
export function masseSavePreset(preset)  { send('SAVE',                 { preset }) }
export function masseDeletePreset(id)    { send('DELETE',               { id }) }

// --- Kamera-Panel ---
export function setKameraViewport(state) { send('SET_VIEWPORT', { ...state }) }
export function setKameraProjection(parallel) { send('SET_PROJECTION', { parallel: !!parallel }) }
export function setKameraIso(octant)     { send('SET_ISO', { octant: octant || 'NE' }) }
export function kameraZoomExtents()      { send('ZOOM_EXTENTS', {}) }
export function saveKameraPreset(name)   { send('SAVE_PRESET', { name }) }
export function applyKameraPreset(id)    { send('APPLY_PRESET', { id }) }
export function deleteKameraPreset(id)   { send('DELETE_PRESET', { id }) }
export function setKameraNorthAngle(angle) { send('SET_NORTH_ANGLE', { angle: Number(angle) || 0 }) }
// Ebenenkombinationen (gehosted in Oberleiste, gleicher Store wie EBENEN)
export function pickLayerCombination(name)   { send('PICK_LAYER_COMBINATION',   { name: name || null }) }
export function saveLayerCombination(name)   { send('SAVE_LAYER_COMBINATION',   { name }) }
export function deleteLayerCombination(name) { send('DELETE_LAYER_COMBINATION', { name }) }
export function openLayerCombinationsDialog() { send('OPEN_LAYER_COMBINATIONS_DIALOG', {}) }
export function runCommand(cmd)          { send('RUN_COMMAND',      { cmd }) }
export function sendKeys(text, enter)    { send('SEND_KEYS',        { text, enter: enter !== false }) }
export function cancelCommand()          { send('CANCEL_COMMAND',   {}) }
export function toggleRhinoCmdLine()     { send('TOGGLE_RHINO_CMD_LINE', {}) }
export function getDossierSettings()     { send('GET_SETTINGS', {}) }
export function openDossierSettings()    { send('OPEN_SETTINGS', {}) }
export function applyWindowLayout(name)  { send('APPLY_LAYOUT', { name }) }
export function saveLayoutPref(name, autoApply) {
  send('SAVE_LAYOUT_PREF',
       { defaultLayout: name || '', autoApplyLayout: !!autoApply })
}

// --- Overrides-Panel ---
export function setOverridesEnabled(on)  { send('SET_ENABLED',      { enabled: !!on }) }
export function addRule(rule)            { send('ADD_RULE',         { rule }) }
export function updateRule(id, rule)     { send('UPDATE_RULE',      { id, rule }) }
export function deleteRule(id)           { send('DELETE_RULE',      { id }) }
export function reorderRules(order)      { send('REORDER_RULES',    { order }) }
export function duplicateRule(id)        { send('DUPLICATE_RULE',   { id }) }
export function reapplyOverrides()       { send('REAPPLY', {}) }
export function clearOverrideRules()     { send('CLEAR_RULES', {}) }
export function savePreset(name)         { send('SAVE_PRESET',   { name }) }
export function loadPreset(name, mode)   { send('LOAD_PRESET',   { name, mode: mode || 'replace' }) }
export function deletePreset(name)       { send('DELETE_PRESET', { name }) }
// Rule-Templates: einzelne Regel speichern/anwenden/loeschen
export function saveRuleTemplate(name, rule) { send('SAVE_RULE_TEMPLATE', { name, rule }) }
export function addFromTemplate(name)        { send('ADD_FROM_TEMPLATE',  { name }) }
export function deleteRuleTemplate(name)     { send('DELETE_RULE_TEMPLATE', { name }) }

// --- Dimensionen-Panel ---
export function setRefPoint(x, y, z)     { send('SET_REF_POINT',    { x, y, z }) }
export function setCoordSystem(mode)     { send('SET_COORD_SYSTEM', { mode }) }
export function setDimPosition(axis, value)    { send('SET_POSITION',  { axis, value }) }
export function setDimDimension(axis, value)   { send('SET_DIMENSION', { axis, value }) }
export function setDimRotationZ(angle)         { send('SET_ROTATION_Z', { angle }) }
export function setCircleRadius(value)         { send('SET_CIRCLE_RADIUS', { value }) }
export function setLineLength(value)           { send('SET_LINE_LENGTH',   { value }) }
export function setRectangleDims(width, height) { send('SET_RECTANGLE',    { width, height }) }

// --- Layouts-Panel ---
export function listLayouts()            { send('LIST', {}) }
export function newLayout(name, format, landscape, customWidth, customHeight) {
  send('NEW_LAYOUT', { name, format, landscape: !!landscape,
                       customWidth, customHeight })
}
export function deleteLayout(id)         { send('DELETE_LAYOUT',   { id }) }
export function renameLayout(id, name)   { send('RENAME_LAYOUT',   { id, name }) }
export function activateLayout(id)       { send('ACTIVATE_LAYOUT', { id }) }
export function addDetail(pageId, ausschnittId) {
  send('ADD_DETAIL', { pageId, ausschnittId: ausschnittId || null })
}
export function deleteDetail(pageId, detailId) {
  send('DELETE_DETAIL', { pageId, detailId })
}
export function bindAusschnitt(pageId, detailId, ausschnittId) {
  send('BIND_AUSSCHNITT', { pageId, detailId, ausschnittId: ausschnittId || null })
}
export function syncDetail(pageId, detailId) { send('SYNC_DETAIL', { pageId, detailId }) }
export function syncLayout(id)               { send('SYNC_LAYOUT', { id }) }
export function setPageSize(id, format, landscape, customWidth, customHeight) {
  send('SET_PAGE_SIZE', { id, format, landscape: !!landscape,
                          customWidth, customHeight })
}
export function exportPdf(id, dpi)           { send('EXPORT_PDF', { id, dpi: dpi || 300 }) }
export function openLayoutDialog(mode, layout) { send('OPEN_LAYOUT_DIALOG', { mode: mode || 'new', layout: layout || null }) }
export function exportPdfAll(dpi)            { send('EXPORT_PDF', { dpi: dpi || 300 }) }
export function exportPdfMany(ids, dpi)      { send('EXPORT_PDF', { ids, dpi: dpi || 300 }) }
export function addLayoutFolder(name)        { send('ADD_FOLDER',    { name }) }
export function removeLayoutFolder(name)     { send('REMOVE_FOLDER', { name }) }
export function setLayoutFolder(id, folder)  { send('SET_FOLDER',    { id, folder }) }

// --- Elemente-Panel (Smart Architektur-Elemente) ---
export function listElemente()           { send('LIST', {}) }
export function createWall(p)            { send('CREATE_WALL', p || {}) }
export function createDecke(p)           { send('CREATE_DECKE', p || {}) }
export function createDach(p)            { send('CREATE_DACH',  p || {}) }
export function createFenster(p)         { send('CREATE_FENSTER', p || {}) }
export function createTuer(p)            { send('CREATE_TUER',    p || {}) }
export function createAussparung(p)      { send('CREATE_AUSSPARUNG', p || {}) }
export function createTreppe(p)          { send('CREATE_TREPPE',  p || {}) }
export function createStuetze(p)         { send('CREATE_STUETZE', p || {}) }
export function createTraeger(p)         { send('CREATE_TRAEGER', p || {}) }
export function createRaum(p)            { send('CREATE_RAUM',    p || {}) }
export function exportRaeume()           { send('EXPORT_RAEUME', {}) }
export function openSwisstopo(mode)      { send('OPEN_SWISSTOPO',   { mode: mode || 'both' }) }
export function importSwisstopo(kind)    { send('IMPORT_SWISSTOPO', { kind: kind || 'buildings' }) }
export function openSwisstopoDialog()    { send('OPEN_SWISSTOPO_DIALOG', {}) }
export function openOsmDialog()          { send('OPEN_OSM_DIALOG', {}) }
export function updateElement(id, patch) { send('UPDATE_ELEMENT', { id, ...(patch || {}) }) }
export function deleteElement(id)        { send('DELETE_ELEMENT', { id }) }
// Backwards-Compat-Aliases
export function updateWall(id, patch)    { send('UPDATE_WALL', { id, ...(patch || {}) }) }
export function deleteWall(id)           { send('DELETE_WALL', { id }) }
export function regenerateAllWalls()     { send('REGENERATE_ALL', {}) }
export function regenerateAllElements()  { send('REGENERATE_ALL', {}) }


let _visTimer = null
let _visArgs  = null

// --- EBENEN: Ebenenkombinationen (geteilter Store mit AUSSCHNITTE) ---
export function getCombination()                 { send('GET_COMBINATION', {}) }
export function applyCombination(layersOrPreset) {
  // Akzeptiert entweder ein Array von Layer-States (alt) oder ein Preset-
  // Objekt {layers, dossierEbenen, dossierZeichnungsebenen} (neu). Backend kommt
  // mit beiden Formaten klar.
  if (Array.isArray(layersOrPreset)) {
    send('APPLY_COMBINATION', { layers: layersOrPreset })
  } else if (layersOrPreset && typeof layersOrPreset === 'object') {
    send('APPLY_COMBINATION', layersOrPreset)
  } else {
    send('APPLY_COMBINATION', { layers: [] })
  }
}
export function saveCombinationPreset(name, layers) { send('SAVE_PRESET',   { name, layers }) }
export function saveCurrentAsCombination(name)   { send('SAVE_CURRENT_AS_PRESET', { name }) }
export function deleteCombinationPreset(name)    { send('DELETE_PRESET', { name }) }

// Satelliten-Fenster oeffnen — Python oeffnet ein echtes Rhino-Fenster
// (Eto.Form mit eingebetteter WebView) mit dem Settings-Dialog.
export function openGeschossSettings(geschoss) {
  send('OPEN_GESCHOSS_SETTINGS', { geschoss })
}
export function openEbenenSettings(ebene, hatchPatterns) {
  send('OPEN_EBENEN_SETTINGS', { ebene, hatchPatterns })
}
export function openGeschossDialog(zeichnungsebenen) {
  send('OPEN_GESCHOSS_DIALOG', { zeichnungsebenen })
}

export function applyVisibility(activeZ, zeichnungsebenen, activeCode, ebenen, zMode, eMode) {
  // Split-Panels koennen mit null/[] fuer fremde Slice aufrufen — Backend
  // fuellt aus doc.Strings. Hier robust gegen alles Falsy.
  _visArgs = { activeZ, zeichnungsebenen, activeCode, ebenen, zMode, eMode }
  if (_visTimer) clearTimeout(_visTimer)
  _visTimer = setTimeout(() => {
    _visTimer = null
    const a = _visArgs
    const zList = Array.isArray(a.zeichnungsebenen) ? a.zeichnungsebenen : []
    const eList = Array.isArray(a.ebenen) ? a.ebenen : []
    const slimZ = zList.map(z => ({
      id: z.id, name: z.name,
      visible: z.visible !== false,
      locked:  z.locked === true,
    }))
    // Rekursiv durch Children — sonst landen Sub-Ebenen-Toggles nicht beim
    // Backend.
    const slimEbene = (e) => {
      const out = {
        code: e.code,
        visible: e.visible !== false,
        locked:  e.locked === true,
      }
      if (Array.isArray(e.children) && e.children.length) {
        out.children = e.children.map(slimEbene)
      }
      return out
    }
    const slimE = eList.map(slimEbene)
    send('SET_VISIBILITY', {
      activeZ:          a.activeZ ? { id: a.activeZ.id } : null,
      activeCode:       a.activeCode,
      zeichnungsebenen: slimZ,
      ebenen:           slimE,
      zMode:            a.zMode,
      eMode:            a.eMode,
    })
  }, 30)
}