DOSSIER/rhino/ausschnitte.py

#! python 3
# -*- coding: utf-8 -*-
"""
ausschnitte.py
AUSSCHNITTE-Panel: speichert Viewport-Ausschnitte mit Kamera, Display-Mode,
Layer-Sichtbarkeit, DOSSIER-State. Anwendbar im Model-Space und auf Layout-Details.
"""
import os
import sys
import math
import json
import uuid
import Rhino
import System
import scriptcontext as sc

_HERE = os.path.dirname(os.path.abspath(__file__))
if _HERE not in sys.path:
    sys.path.insert(0, _HERE)

import panel_base

PANEL_GUID_STR = "5c9e4f3f-6d0e-4f1f-b3c4-d5e6f7081a2b"
_STORE_KEY     = "dossier_ausschnitte"
_FOLDERS_KEY   = "dossier_ausschnitt_folders"
_PRESETS_KEY   = "dossier_layer_presets"


def _orientation_from_camera(loc, tgt, parallel=True):
    """Bestimmt Orientierung:
    - perspective = perspektivische Projektion (kein orthogonaler Schnitt)
    - horizontal  = parallele Projektion mit Blick weitgehend nach unten/oben (Grundriss)
    - vertical    = parallele Projektion mit Blick weitgehend seitlich (Schnitt/Ansicht)
    """
    if not parallel:
        return "perspective"
    try:
        dx = tgt[0] - loc[0]
        dy = tgt[1] - loc[1]
        dz = tgt[2] - loc[2]
        m  = math.sqrt(dx * dx + dy * dy + dz * dz)
        if m <= 0: return "vertical"
        return "horizontal" if (abs(dz) / m) > 0.7 else "vertical"
    except Exception:
        return "vertical"


def _parse_scale(scale_str):
    """Parse '1:50' / '1=50' / '50' → (page, model). Gibt None zurueck wenn nicht parsebar."""
    if not scale_str:
        return None
    s = scale_str.strip()
    for sep in (":", "=", "/"):
        if sep in s:
            try:
                a, b = s.split(sep, 1)
                pa = float(a.strip())
                pb = float(b.strip())
                if pa > 0 and pb > 0:
                    return (pa, pb)
            except Exception:
                pass
            break
    # nur Zahl: 1:N angenommen
    try:
        n = float(s)
        if n > 0:
            return (1.0, n)
    except Exception:
        pass
    return None


# --- Capture / Apply Helpers ------------------------------------------------

def _capture_camera(vp):
    dm    = vp.DisplayMode
    dm_id = str(dm.Id) if dm else None
    dm_nm = dm.LocalName if dm else None
    loc   = [vp.CameraLocation.X, vp.CameraLocation.Y, vp.CameraLocation.Z]
    tgt   = [vp.CameraTarget.X,   vp.CameraTarget.Y,   vp.CameraTarget.Z]
    # Frustum-Breite mitsichern: bei Parallelprojektion bestimmt sie den Zoom.
    # Ohne sie laesst sich der gespeicherte Ausschnitt nicht rekonstruieren.
    frustum_w = None
    frustum_h = None
    try:
        ok, l, r, b, t, n, f = vp.GetFrustum()
        if ok:
            frustum_w = float(r - l)
            frustum_h = float(t - b)
    except Exception:
        pass
    return {
        "viewName":        vp.Name,
        "location":        loc,
        "target":          tgt,
        "up":              [vp.CameraUp.X,       vp.CameraUp.Y,       vp.CameraUp.Z],
        "lens":            float(vp.Camera35mmLensLength) if vp.Camera35mmLensLength else 50.0,
        "parallel":        bool(vp.IsParallelProjection),
        "displayMode":     dm_id,
        "displayModeName": dm_nm,
        "orientation":     _orientation_from_camera(loc, tgt, bool(vp.IsParallelProjection)),
        "frustumWidth":    frustum_w,
        "frustumHeight":   frustum_h,
    }


def _apply_camera(vp, cam):
    if not cam: return
    try:
        loc = Rhino.Geometry.Point3d(*cam["location"])
        tgt = Rhino.Geometry.Point3d(*cam["target"])
        up  = Rhino.Geometry.Vector3d(*cam["up"]) if cam.get("up") else None
        if cam.get("parallel"):
            vp.ChangeToParallelProjection(True)
        else:
            vp.ChangeToPerspectiveProjection(True, float(cam.get("lens", 50)))
        vp.SetCameraLocations(tgt, loc)
        if up:
            try: vp.CameraUp = up
            except Exception: pass
        dm_id = cam.get("displayMode")
        if dm_id:
            try:
                mode = Rhino.Display.DisplayModeDescription.GetDisplayMode(System.Guid(dm_id))
                if mode is not None: vp.DisplayMode = mode
            except Exception:
                pass
        # Zoom (Frustum-Breite) rekonstruieren — nur bei Parallelprojektion sinnvoll.
        # Bei Perspective bestimmt die Lens-Length den Bildausschnitt, dort
        # waere ein Magnify kontraproduktiv.
        fw = cam.get("frustumWidth")
        if fw and fw > 0 and cam.get("parallel"):
            try:
                ok, l, r, b, t, n, f = vp.GetFrustum()
                if ok:
                    cur_w = float(r - l)
                    if cur_w > 0:
                        factor = cur_w / float(fw)
                        if 1e-9 < factor < 1e9:
                            try:
                                vp.Magnify(float(factor), False)
                            except Exception:
                                try:
                                    vp.Magnify(float(factor))
                                except Exception:
                                    Rhino.RhinoApp.RunScript(
                                        "_-Zoom _Factor {:.6f} _Enter".format(factor), False)
            except Exception as ex:
                print("[AUSSCHNITTE] Frustum-Apply:", ex)
    except Exception as ex:
        print("[AUSSCHNITTE] Camera-Apply:", ex)


def _capture_layers(doc):
    out = []
    for layer in doc.Layers:
        if layer.IsDeleted: continue
        out.append({
            "id":      str(layer.Id),
            "visible": bool(layer.IsVisible),
            "locked":  bool(layer.IsLocked),
        })
    return out


def _apply_layers_global(doc, layers):
    by_id = {}
    for layer in doc.Layers:
        if not layer.IsDeleted:
            by_id[str(layer.Id)] = layer
    for ls in layers:
        layer = by_id.get(ls.get("id"))
        if layer is None: continue
        if layer.IsVisible != ls.get("visible", True):
            layer.IsVisible = ls.get("visible", True)
        if layer.IsLocked != ls.get("locked", False):
            layer.IsLocked = ls.get("locked", False)


def _apply_layers_per_viewport(doc, layers, vp_id):
    """Setzt Sichtbarkeit pro Viewport (fuer Layout-Details)."""
    by_id = {}
    for layer in doc.Layers:
        if not layer.IsDeleted:
            by_id[str(layer.Id)] = layer
    for ls in layers:
        layer = by_id.get(ls.get("id"))
        if layer is None: continue
        try:
            layer.SetPerViewportVisible(vp_id, ls.get("visible", True))
        except Exception:
            pass


_DOSSIER_KEYS = (
    "dossier_zeichnungsebenen",
    "dossier_ebenen",
    "dossier_active_id",
    "dossier_active_code",
)


def _capture_dossier_state(doc):
    out = {}
    for k in _DOSSIER_KEYS:
        v = doc.Strings.GetValue(k)
        if v is not None:
            out[k] = v
    return out


def _apply_dossier_state(doc, state):
    for k, v in (state or {}).items():
        if v is not None:
            doc.Strings.SetString(k, v)


def _find_selected_detail(doc):
    """Sucht nach einem aktuell selektierten Detail-Viewport-Objekt."""
    for obj in doc.Objects.GetSelectedObjects(False, False):
        if isinstance(obj, Rhino.DocObjects.DetailViewObject):
            return obj
    return None


def _load_snapshots(doc):
    """Modul-interne Snapshot-Liste (cross-modul nutzbar)."""
    raw = doc.Strings.GetValue(_STORE_KEY)
    if not raw: return []
    try:
        data = json.loads(raw)
        return data if isinstance(data, list) else []
    except Exception:
        return []


def apply_snapshot_to_detail(doc, detail, snap_id):
    """Wendet einen Ausschnitt auf ein konkretes Detail-Object an. Wird vom
    Layouts-Modul benutzt, um Ausschnitt-Detail-Bindings zu synchronisieren.
    Liefert True bei Erfolg."""
    snap = next((s for s in _load_snapshots(doc) if s.get("id") == snap_id), None)
    if not snap:
        print("[AUSSCHNITTE] apply_to_detail: snap nicht gefunden", snap_id)
        return False
    # Page-View ermitteln (fuer SetActiveDetail/SetPageAsActive)
    page_view = None
    try:
        for view in doc.Views:
            if isinstance(view, Rhino.Display.RhinoPageView):
                try:
                    if any(d.Id == detail.Id for d in view.GetDetailViews()):
                        page_view = view
                        break
                except Exception:
                    continue
    except Exception as ex:
        print("[AUSSCHNITTE] page-view-suche:", ex)
    # Detail muss aktiv sein, damit Kamera-Aenderungen anschlagen
    was_active = False
    try: was_active = detail.IsActive
    except Exception: pass
    if page_view is not None and not was_active:
        try: page_view.SetActiveDetail(detail.Id)
        except Exception as ex: print("[AUSSCHNITTE] SetActiveDetail:", ex)
    # Kamera + Layer + Name
    vp = detail.Viewport
    _apply_camera(vp, snap.get("camera"))
    _apply_layers_per_viewport(doc, snap.get("layers", []), vp.Id)
    try:
        new_name = snap.get("name")
        if new_name and vp.Name != new_name:
            vp.Name = new_name
    except Exception as ex:
        print("[AUSSCHNITTE] Detail-Rename:", ex)
    # Massstab
    ratio = _parse_scale(snap.get("scale", ""))
    if ratio is not None:
        page_v, model_v = ratio
        for label, setter in (
            ("DetailGeometry.SetScale", lambda: detail.DetailGeometry.SetScale(model_v, page_v)),
            ("Detail.SetScale",         lambda: detail.SetScale(model_v, page_v)),
        ):
            try:
                setter()
                break
            except Exception:
                continue
    # Commit + Deaktivieren
    try: detail.CommitViewportChanges()
    except Exception:
        try: detail.CommitChanges()
        except Exception: pass
    if page_view is not None and not was_active:
        try: page_view.SetPageAsActive()
        except Exception: pass
    try:
        (page_view or doc.Views).Redraw()
    except Exception:
        doc.Views.Redraw()
    print("[AUSSCHNITTE] '{}' auf Detail {} angewendet".format(snap.get("name"), detail.Id))
    return True


# --- Bridge -----------------------------------------------------------------

class AusschnittBridge(panel_base.BaseBridge):
    def __init__(self):
        panel_base.BaseBridge.__init__(self, "ausschnitte")

    def _on_ready(self):
        self._send_list()

    def handle(self, data):
        if not isinstance(data, dict): return
        t = data.get("type", "")
        p = data.get("payload") or {}
        if not isinstance(p, dict): p = {}

        if t == "READY":            self._on_ready()
        elif t == "LIST":           self._send_list()
        elif t == "SAVE":           self._save(p.get("name", "Ausschnitt"))
        elif t == "UPDATE":         self._update(p.get("id"))
        elif t == "RESTORE":        self._restore(p.get("id"))
        elif t == "APPLY_TO_DETAIL":self._apply_to_detail(p.get("id"))
        elif t == "RENAME":         self._rename(p.get("id"), p.get("name"))
        elif t == "DELETE":         self._delete(p.get("id"))
        elif t == "SET_FOLDER":     self._set_field(p.get("id"), "folder", p.get("folder") or "")
        elif t == "SET_SCALE":      self._set_field(p.get("id"), "scale",  p.get("scale")  or "")
        elif t == "SET_DARSTELLUNG": self._set_field(p.get("id"), "darstellung",
                                                       p.get("darstellung") or "")
        elif t == "DUPLICATE":      self._duplicate(p.get("id"))
        elif t == "ADD_FOLDER":     self._add_folder(p.get("name"))
        elif t == "REMOVE_FOLDER":  self._remove_folder(p.get("name"))
        elif t == "GET_LAYERS":     self._send_layers(p.get("id"))
        elif t == "UPDATE_LAYERS":  self._update_layers(p.get("id"), p.get("layers") or [])
        elif t == "SAVE_PRESET":    self._save_preset(p.get("name"), p.get("layers") or [])
        elif t == "DELETE_PRESET":  self._delete_preset(p.get("name"))
        elif t == "OPEN_SETTINGS":  self._open_settings_window(p.get("id"))

    def _load(self, doc):
        raw = doc.Strings.GetValue(_STORE_KEY)
        if not raw: return []
        try:
            data = json.loads(raw)
            return data if isinstance(data, list) else []
        except Exception:
            return []

    def _store(self, doc, snaps):
        doc.Strings.SetString(_STORE_KEY, json.dumps(snaps, ensure_ascii=False))

    def _load_folders(self, doc):
        raw = doc.Strings.GetValue(_FOLDERS_KEY)
        if not raw: return []
        try:
            data = json.loads(raw)
            return data if isinstance(data, list) else []
        except Exception:
            return []

    def _store_folders(self, doc, folders):
        doc.Strings.SetString(_FOLDERS_KEY, json.dumps(folders, ensure_ascii=False))

    def _load_presets(self, doc):
        raw = doc.Strings.GetValue(_PRESETS_KEY)
        if not raw: return []
        try:
            data = json.loads(raw)
            return data if isinstance(data, list) else []
        except Exception:
            return []

    def _store_presets(self, doc, presets):
        doc.Strings.SetString(_PRESETS_KEY, json.dumps(presets, ensure_ascii=False))

    def _send_list(self):
        doc = Rhino.RhinoDoc.ActiveDoc
        snaps = self._load(doc)
        explicit_folders = self._load_folders(doc)
        # Aus Snapshots zusaetzliche Ordner ableiten (falls Snap auf nicht-existenten Ordner zeigt)
        for s in snaps:
            f = s.get("folder", "")
            if f and f not in explicit_folders:
                explicit_folders.append(f)
        slim = []
        for s in snaps:
            cam = s.get("camera", {}) or {}
            orient = cam.get("orientation")
            if not orient:
                loc = cam.get("location") or [0, 0, 0]
                tgt = cam.get("target")   or [0, 0, 0]
                orient = _orientation_from_camera(loc, tgt, bool(cam.get("parallel", True)))
            slim.append({
                "id":              s.get("id"),
                "name":            s.get("name"),
                "folder":          s.get("folder", ""),
                "scale":           s.get("scale", ""),
                "orientation":     orient,
                "displayModeName": cam.get("displayModeName"),
                "parallel":        cam.get("parallel", False),
            })
        preset_summary = [{"name": p.get("name"), "count": len(p.get("layers") or [])}
                          for p in self._load_presets(doc)]
        self.send("LIST", {
            "snapshots": slim,
            "folders":   explicit_folders,
            "presets":   preset_summary,
        })

    def _add_folder(self, name):
        if not name: return
        name = name.strip()
        if not name: return
        doc = Rhino.RhinoDoc.ActiveDoc
        folders = self._load_folders(doc)
        if name not in folders:
            folders.append(name)
            self._store_folders(doc, folders)
        self._send_list()

    def _remove_folder(self, name):
        if not name: return
        doc = Rhino.RhinoDoc.ActiveDoc
        # Aus Folder-Liste entfernen
        folders = [f for f in self._load_folders(doc) if f != name]
        self._store_folders(doc, folders)
        # Snapshots aus diesem Ordner herausnehmen (auf root)
        snaps = self._load(doc)
        for s in snaps:
            if s.get("folder") == name:
                s["folder"] = ""
        self._store(doc, snaps)
        self._send_list()

    def _duplicate(self, snap_id):
        if not snap_id: return
        doc = Rhino.RhinoDoc.ActiveDoc
        snaps = self._load(doc)
        src = next((s for s in snaps if s.get("id") == snap_id), None)
        if not src: return
        # Tiefe Kopie via JSON
        copy = json.loads(json.dumps(src, ensure_ascii=False))
        copy["id"]   = "snap_" + uuid.uuid4().hex[:8]
        copy["name"] = (src.get("name", "Ausschnitt") + " Kopie")
        # Direkt nach Original einfuegen
        idx = snaps.index(src)
        snaps.insert(idx + 1, copy)
        self._store(doc, snaps)
        self._send_list()
        print("[AUSSCHNITTE] '{}' dupliziert".format(src.get("name")))

    def _set_field(self, snap_id, field, value):
        if not snap_id: return
        doc = Rhino.RhinoDoc.ActiveDoc
        snaps = self._load(doc)
        for s in snaps:
            if s.get("id") == snap_id:
                s[field] = value
                break
        self._store(doc, snaps)
        self._send_list()

    def _capture(self, doc, name, existing_id=None, prior_scale=""):
        view = doc.Views.ActiveView
        if view is None:
            print("[AUSSCHNITTE] Keine aktive View")
            return None
        vp = view.ActiveViewport
        # Aktuelle Skala vom MASSSTAB-Modul holen — nur sinnvoll bei Parallel-
        # projektion. In Perspective bleibt scale leer (Fallback: prior_scale).
        scale_str = ""
        try:
            import massstab
            # Bewusst der EINGESTELLTE Wert (User-Intent), nicht der live aus
            # dem Viewport berechnete. Letzterer drifted bei Pan/Zoom.
            ratio = massstab.get_applied_scale_ratio()
            if ratio is not None and ratio > 0:
                if ratio >= 10:
                    scale_str = "1:{:.0f}".format(ratio)
                else:
                    scale_str = "1:{:.1f}".format(ratio)
        except Exception as ex:
            print("[AUSSCHNITTE] Live-Skala lesen:", ex)
        # Fallback: wenn kein Massstab gepinnt war, die aus dem Frustum
        # berechnete Live-Skala speichern. So bleibt das Massstab-Dropdown
        # nach Restore konsistent (auch wenn der eigentliche Zoom-Restore
        # bereits ueber frustumWidth in _apply_camera laeuft).
        if not scale_str:
            try:
                import massstab
                live = massstab.get_current_scale_ratio()
                if live is not None and live > 0:
                    scale_str = "1:{:.0f}".format(live) if live >= 10 else "1:{:.1f}".format(live)
            except Exception as ex:
                print("[AUSSCHNITTE] Live-Skala (Fallback):", ex)
        if not scale_str and prior_scale:
            scale_str = prior_scale  # Perspective -> alten Wert nicht ueberschreiben
        # Darstellungs-Override aus dem aktuellen Doc-Setting uebernehmen.
        # Leer = "kein Override, per-Object respektieren".
        darst = ""
        try:
            import elemente
            darst = elemente.get_aktive_darstellung(doc) or ""
        except Exception: pass
        return {
            "id":          existing_id or "snap_" + uuid.uuid4().hex[:8],
            "name":        name,
            "scale":       scale_str,
            "camera":      _capture_camera(vp),
            "layers":      _capture_layers(doc),
            "dossier":     _capture_dossier_state(doc),
            "darstellung": darst,
        }

    def _save(self, name):
        doc = Rhino.RhinoDoc.ActiveDoc
        snap = self._capture(doc, name)
        if snap is None: return
        snaps = self._load(doc)
        snaps.append(snap)
        self._store(doc, snaps)
        self._send_list()
        print("[AUSSCHNITTE] '{}' gespeichert".format(name))

    def _update(self, snap_id):
        doc = Rhino.RhinoDoc.ActiveDoc
        snaps = self._load(doc)
        target = next((s for s in snaps if s.get("id") == snap_id), None)
        if not target: return
        updated = self._capture(doc, target.get("name", "Ausschnitt"),
                                existing_id=snap_id,
                                prior_scale=target.get("scale", ""))
        if updated is None: return
        for i, s in enumerate(snaps):
            if s.get("id") == snap_id:
                snaps[i] = updated
                break
        self._store(doc, snaps)
        self._send_list()
        print("[AUSSCHNITTE] '{}' aktualisiert".format(target.get("name")))

    def _restore(self, snap_id):
        doc  = Rhino.RhinoDoc.ActiveDoc
        snap = next((s for s in self._load(doc) if s.get("id") == snap_id), None)
        if not snap: return
        view = doc.Views.ActiveView
        if view is None: return
        vp = view.ActiveViewport
        _apply_camera(vp, snap.get("camera"))
        # Layer-Sichtbarkeit: bevorzugt die referenzierte Ebenenkombi (live —
        # zeigt aktuelle Kombi-Definition). Fallback: snap.layers (per-snap
        # eingefrorener Zustand).
        kombi = (snap.get("layerCombination") or "").strip()
        if kombi:
            try:
                import rhinopanel
                rhinopanel.apply_layer_preset_by_name(doc, kombi)
            except Exception as ex:
                print("[AUSSCHNITTE] kombi-apply '{}':".format(kombi), ex)
                _apply_layers_global(doc, snap.get("layers", []))
        else:
            _apply_layers_global(doc, snap.get("layers", []))
            # Eigene Sichtbarkeit → active_comb_name clearen
            try:
                import rhinopanel
                rhinopanel.set_active_comb_name(doc, None)
                rhinopanel._notify_oberleiste_combs()
            except Exception: pass
        _apply_dossier_state(doc, snap.get("dossier") or snap.get("pause") or {})
        # Darstellung anwenden + Oeffnungen regenerieren
        try:
            import elemente
            new_darst = snap.get("darstellung") or ""
            cur_darst = elemente.get_aktive_darstellung(doc) or ""
            if new_darst != cur_darst:
                elemente.set_aktive_darstellung(doc, new_darst)
                elemente.regenerate_all_oeffnungen(doc)
                # Oberleiste-Topbar muss neuen Wert spiegeln
                try:
                    b = sc.sticky.get("oberleiste_bridge")
                    if b is not None: b._send_state(force=True)
                except Exception: pass
        except Exception as ex:
            print("[AUSSCHNITTE] darstellung apply:", ex)
        # Overrides: nur anwenden wenn das Snap "applyOverrides" gesetzt hat.
        # Sonst bleibt der aktuelle User-Override-State unangetastet.
        if snap.get("applyOverrides"):
            try:
                import overrides
                overrides.set_enabled(doc, bool(snap.get("overridesEnabled")))
                overrides.set_active_preset(doc, snap.get("overridesPreset") or None)
                # Oberleiste-Cache invalidieren damit Topbar das neue Preset zeigt
                try:
                    b = sc.sticky.get("oberleiste_bridge")
                    if b is not None:
                        b._cached_overrides = None
                        b._send_state(force=True)
                except Exception: pass
            except Exception as ex:
                print("[AUSSCHNITTE] overrides-apply:", ex)
        # Viewport ZUERST umbenennen — der per-Viewport-Massstab in massstab.py
        # wird unter vp.Name geschluesselt. Erst nach dem Rename schreibt
        # _apply_scale unter dem neuen Namen, sonst landet der Wert beim alten
        # Ausschnitt und der neue zeigt "1:?".
        try:
            new_name = snap.get("name")
            if new_name and vp.Name != new_name:
                vp.Name = new_name
        except Exception as ex:
            print("[AUSSCHNITTE] Rename:", ex)
        # Gespeicherten Massstab anwenden (z.B. "1:50") — falls vorhanden und
        # Viewport parallel ist (in Perspective ignoriert massstab._apply_scale).
        try:
            scale_str = (snap.get("scale") or "").strip()
            if scale_str:
                ratio = _parse_scale(scale_str)
                if ratio:
                    _, model_v = ratio  # (page=1, model=N) -> N
                    import massstab
                    massstab._apply_scale(doc, vp, float(model_v))
                    print("[AUSSCHNITTE] Massstab gesetzt auf 1:{} (applied={})".format(
                        model_v, massstab.get_applied_scale_ratio()))
                    # Andere Panels (Massstab, Oberleiste) sofort ueber den
                    # neuen appliedScale informieren — sonst zeigt das Dropdown
                    # noch den vorherigen Wert bis zum naechsten Idle-Tick mit
                    # Aenderung an der Live-Skala.
                    for key in ("massstab_bridge", "oberleiste_bridge"):
                        try:
                            b = sc.sticky.get(key)
                            print("[AUSSCHNITTE] force-send via {}: {}".format(key, "OK" if b is not None else "MISSING"))
                            if b is not None:
                                b._send_state(force=True)
                        except Exception as e:
                            print("[AUSSCHNITTE] force-send {} failed: {}".format(key, e))
        except Exception as ex:
            print("[AUSSCHNITTE] Massstab-Restore:", ex)
        view.Redraw()
        print("[AUSSCHNITTE] '{}' wiederhergestellt".format(snap.get("name")))

    def _apply_to_detail(self, snap_id):
        doc = Rhino.RhinoDoc.ActiveDoc
        # 1) Detail aus Selektion oder aktiver PageView ermitteln
        detail = _find_selected_detail(doc)
        if detail is None:
            try:
                av = doc.Views.ActiveView
                if isinstance(av, Rhino.Display.RhinoPageView):
                    for d in av.GetDetailViews():
                        if d.IsActive:
                            detail = d
                            break
            except Exception as ex:
                print("[AUSSCHNITTE] Active-Detail-Suche:", ex)
        if detail is None:
            print("[AUSSCHNITTE] Kein Detail ausgewaehlt — bitte:")
            print("  1) ins Layout wechseln")
            print("  2) Detail-Rahmen einmal anklicken (so dass er hervorgehoben ist)")
            print("  3) erneut 'Auf Detail anwenden' waehlen")
            return
        # 2) Delegieren an den oeffentlichen Helper
        apply_snapshot_to_detail(doc, detail, snap_id)

    def _send_layers(self, snap_id):
        if not snap_id: return
        doc = Rhino.RhinoDoc.ActiveDoc
        snap = next((s for s in self._load(doc) if s.get("id") == snap_id), None)
        if not snap:
            print("[AUSSCHNITTE] Snap nicht gefunden:", snap_id)
            return
        snap_by_id = {}
        for ls in (snap.get("layers") or []):
            snap_by_id[ls.get("id")] = ls

        layers = []
        for layer in doc.Layers:
            if layer.IsDeleted: continue
            lid = str(layer.Id)
            ls  = snap_by_id.get(lid, {})
            layers.append({
                "id":       lid,
                "name":     layer.Name,
                "fullPath": layer.FullPath,
                "color":    "#%02x%02x%02x" % (layer.Color.R, layer.Color.G, layer.Color.B),
                "visible":  bool(ls.get("visible", layer.IsVisible)),
                "locked":   bool(ls.get("locked", layer.IsLocked)),
            })
        layers.sort(key=lambda x: x["fullPath"])
        presets = self._load_presets(doc)
        self.send("LAYERS_DATA", {
            "id":      snap_id,
            "name":    snap.get("name"),
            "layers":  layers,
            "presets": presets,
        })

    def _update_layers(self, snap_id, layers):
        if not snap_id: return
        doc = Rhino.RhinoDoc.ActiveDoc
        snaps = self._load(doc)
        target = next((s for s in snaps if s.get("id") == snap_id), None)
        if not target: return
        new_list = []
        for ls in layers:
            lid = ls.get("id")
            if not lid: continue
            new_list.append({
                "id":      lid,
                "visible": bool(ls.get("visible", True)),
                "locked":  bool(ls.get("locked", False)),
            })
        target["layers"] = new_list
        self._store(doc, snaps)
        self._send_list()
        print("[AUSSCHNITTE] Ebenen-Sichtbarkeit von '{}' aktualisiert".format(target.get("name")))

    def _save_preset(self, name, layers):
        if not name: return
        name = name.strip()
        if not name: return
        doc = Rhino.RhinoDoc.ActiveDoc
        presets = self._load_presets(doc)
        clean = []
        for ls in layers:
            lid = ls.get("id")
            if not lid: continue
            clean.append({
                "id":      lid,
                "visible": bool(ls.get("visible", True)),
                "locked":  bool(ls.get("locked", False)),
            })
        existing = next((p for p in presets if p.get("name") == name), None)
        if existing is not None:
            existing["layers"] = clean
        else:
            presets.append({"name": name, "layers": clean})
        self._store_presets(doc, presets)
        self._send_list()
        print("[AUSSCHNITTE] Ebenenkombination '{}' gespeichert ({} Ebenen)".format(name, len(clean)))

    def _delete_preset(self, name):
        if not name: return
        doc = Rhino.RhinoDoc.ActiveDoc
        presets = [p for p in self._load_presets(doc) if p.get("name") != name]
        self._store_presets(doc, presets)
        self._send_list()

    def _rename(self, snap_id, name):
        if not snap_id or not name: return
        doc = Rhino.RhinoDoc.ActiveDoc
        snaps = self._load(doc)
        for s in snaps:
            if s.get("id") == snap_id:
                s["name"] = name
                break
        self._store(doc, snaps)
        self._send_list()

    def _delete(self, snap_id):
        if not snap_id: return
        doc = Rhino.RhinoDoc.ActiveDoc
        snaps = [s for s in self._load(doc) if s.get("id") != snap_id]
        self._store(doc, snaps)
        self._send_list()

    def _open_settings_window(self, snap_id):
        """Oeffnet ein Satelliten-Fenster (Eto.Form + WebView) mit dem
        Ausschnittseinstellungen-Dialog. Lets User editieren: Massstab,
        Display-Mode, Overrides, Ebenenkombi."""
        if not snap_id: return
        doc = Rhino.RhinoDoc.ActiveDoc
        snap = next((s for s in self._load(doc) if s.get("id") == snap_id), None)
        if not snap:
            print("[AUSSCHNITTE] open_settings: snap nicht gefunden", snap_id)
            return
        outer = self
        bridge_holder = {"form": None, "id": snap_id}

        def _payload():
            d = Rhino.RhinoDoc.ActiveDoc
            sn = next((s for s in outer._load(d) if s.get("id") == bridge_holder["id"]), None)
            if sn is None: sn = {}
            # Listen fuer Dropdowns
            display_modes = []
            try:
                import oberleiste
                display_modes = oberleiste._list_display_modes()
            except Exception as ex:
                print("[AUSSCHNITTE] display_modes:", ex)
            overrides_presets = []
            try:
                import overrides
                overrides_presets = [item.get("name") for item in overrides.list_presets() if item.get("name")]
            except Exception as ex:
                print("[AUSSCHNITTE] overrides_presets:", ex)
            layer_kombis = []
            try:
                import rhinopanel
                layer_kombis = rhinopanel.list_layer_preset_names(d)
            except Exception as ex:
                print("[AUSSCHNITTE] layer_kombis:", ex)
            cam = sn.get("camera") or {}
            return {
                "snap": {
                    "id":              sn.get("id"),
                    "name":            sn.get("name"),
                    "scale":           sn.get("scale", ""),
                    "displayMode":     cam.get("displayMode"),
                    "displayModeName": cam.get("displayModeName"),
                    "applyOverrides":   bool(sn.get("applyOverrides", False)),
                    "overridesEnabled": bool(sn.get("overridesEnabled", False)),
                    "overridesPreset":  sn.get("overridesPreset") or "",
                    "layerCombination": sn.get("layerCombination") or "",
                    "darstellung":      sn.get("darstellung") or "",
                },
                "displayModes":     display_modes,
                "overridesPresets": overrides_presets,
                "layerKombis":      layer_kombis,
            }

        def _persist(settings):
            d = Rhino.RhinoDoc.ActiveDoc
            snaps = outer._load(d)
            sid = bridge_holder["id"]
            target = next((s for s in snaps if s.get("id") == sid), None)
            if target is None:
                print("[AUSSCHNITTE] persist settings: snap weg"); return
            # Massstab
            sc_val = (settings.get("scale") or "").strip()
            target["scale"] = sc_val
            # Display Mode in camera nested
            cam = target.get("camera") or {}
            dm_id = settings.get("displayMode")
            dm_nm = settings.get("displayModeName")
            if dm_id is not None: cam["displayMode"]     = dm_id or None
            if dm_nm is not None: cam["displayModeName"] = dm_nm or None
            target["camera"] = cam
            # Overrides
            target["applyOverrides"]   = bool(settings.get("applyOverrides"))
            target["overridesEnabled"] = bool(settings.get("overridesEnabled"))
            target["overridesPreset"]  = (settings.get("overridesPreset") or "").strip()
            # Ebenenkombi
            target["layerCombination"] = (settings.get("layerCombination") or "").strip()
            # Darstellung (SIA-400 LoD Override fuer diesen Ausschnitt)
            darst = (settings.get("darstellung") or "").strip()
            target["darstellung"] = darst if darst in ("einfach", "standard", "detail") else ""
            outer._store(d, snaps)
            outer._send_list()
            print("[AUSSCHNITTE] Settings fuer '{}' aktualisiert".format(target.get("name")))

        class _AusschnittSettingsBridge(panel_base.BaseBridge):
            def __init__(self):
                panel_base.BaseBridge.__init__(self, "ausschnitt_settings")
            def _on_ready(self):
                self._send_state()
            def _send_state(self):
                self.send("AUSSCHNITT_SETTINGS_STATE", _payload())
            def handle(self, data):
                if not isinstance(data, dict): return
                t = data.get("type", "")
                p = data.get("payload") or {}
                if t == "READY":
                    self._on_ready()
                elif t == "SAVE":
                    _persist(p.get("settings") or {})
                    try:
                        f = bridge_holder.get("form")
                        if f is not None: f.Close()
                    except Exception: pass
                elif t == "CANCEL":
                    try:
                        f = bridge_holder.get("form")
                        if f is not None: f.Close()
                    except Exception: pass

        b = _AusschnittSettingsBridge()
        bridge_holder["form"] = panel_base.open_satellite_window(
            "ausschnitt_settings",
            params=_payload(),
            title="Ausschnitt: {}".format(snap.get("name", "")),
            size=(420, 540),
            bridge=b)


panel_base.register_and_open("ausschnitte", "Ausschnitte", PANEL_GUID_STR, AusschnittBridge,
                             icon_spec=("crop", "#c87050"))