Importer: rename sketch feature + replace/delete old sketch on update

tools/adaptive-isogrid/src/nx/import_profile.py

@@ -75,6 +75,59 @@ def unproject_point_to_3d(
 # NX sketch creation
 # ---------------------------------------------------------------------------
 
+def _find_old_sketch_feature(part: Any, sketch_name: str, lister: Any):
+    """
+    Find an existing sketch feature by Name attribute.
+    Returns the Feature object (not Sketch), or None.
+    """
+    try:
+        for feat in part.Features:
+            try:
+                if feat.Name == sketch_name:
+                    lister.WriteLine(f"[import] Found existing sketch feature: {sketch_name} ({feat.JournalIdentifier})")
+                    return feat
+            except Exception:
+                continue
+    except Exception:
+        pass
+    return None
+
+
+def _replace_and_delete_old_sketch(part: Any, old_feature: Any, new_feature: Any, lister: Any):
+    """
+    Replace all references from old sketch feature to new one, then delete old.
+    Uses NX Edit > Feature > Replace Feature approach.
+    """
+    import NXOpen
+
+    session = NXOpen.Session.GetSession()
+
+    # Try to replace references from old → new
+    try:
+        # Get all parent features that reference the old sketch (e.g. Extrude)
+        parents = old_feature.GetParents()
+        if parents:
+            lister.WriteLine(f"[import] Old sketch has {len(parents)} parent feature(s) — replacing references")
+            for parent in parents:
+                try:
+                    parent.ReplaceEntity(old_feature, new_feature)
+                    lister.WriteLine(f"[import] Replaced reference in {parent.JournalIdentifier}")
+                except Exception as exc:
+                    lister.WriteLine(f"[import] Could not replace in {parent.JournalIdentifier}: {exc}")
+    except Exception as exc:
+        lister.WriteLine(f"[import] Warning getting parents: {exc}")
+
+    # Delete the old sketch feature
+    try:
+        mark = session.SetUndoMark(NXOpen.Session.MarkVisibility.Visible, "Delete old isogrid sketch")
+        nErrs = session.UpdateManager.AddToDeleteList(old_feature)
+        nErrs2 = session.UpdateManager.DoUpdate(mark)
+        lister.WriteLine(f"[import] Deleted old sketch feature ({nErrs + nErrs2} warnings)")
+    except Exception as exc:
+        lister.WriteLine(f"[import] Warning deleting old sketch: {exc}")
+        lister.WriteLine(f"[import] You may need to manually delete the old sketch")
+
+
 def _find_or_create_sketch(
     part: Any,
     sketch_name: str,
@@ -82,14 +135,16 @@ def _find_or_create_sketch(
     lister: Any,
 ) -> Any:
     """
-    Always create a new sketch on the sandbox plane and name it.
+    Always create a new sketch on the sandbox plane.
-    NX will auto-number internally (e.g. SKETCH_008).
+    After creation, rename the sketch feature to sketch_name.
-    The sketch Name attribute is set to sketch_name for identification.
+    If an old sketch with the same name exists, replace references and delete it.
-    Returns the Sketch object.
+    Returns the (new) Sketch object.
     """
     import NXOpen
 
-    # Always create new sketch — NX handles duplicate names fine
+    # Check for existing sketch with this name (will be replaced later)
+    old_feature = _find_old_sketch_feature(part, sketch_name, lister)
+
     lister.WriteLine(f"[import] Creating new sketch: {sketch_name}")
 
     origin = transform["origin"]
@@ -166,12 +221,28 @@ def _find_or_create_sketch(
     if sketch is None:
         raise RuntimeError("Could not get Sketch object after commit")
 
+    # Rename the sketch feature (not the sketch object — the feature in the tree)
+    # The sketch's owning feature is what shows in the Part Navigator
+    new_feature = None
+    try:
+        new_feature = sketch.Feature
+        new_feature.SetName(sketch_name)
+        lister.WriteLine(f"[import] Renamed feature to: {sketch_name} ({new_feature.JournalIdentifier})")
+    except Exception as exc:
+        lister.WriteLine(f"[import] Warning renaming feature: {exc}")
+        # Fallback: try setting Name on the sketch directly
         try:
             sketch.Name = sketch_name
         except Exception:
             pass
 
     lister.WriteLine(f"[import] Created sketch: {sketch_name}")
+
+    # If old sketch existed, replace references and delete it
+    if old_feature is not None and new_feature is not None:
+        lister.WriteLine(f"[import] Replacing old sketch with new one...")
+        _replace_and_delete_old_sketch(part, old_feature, new_feature, lister)
+
     return sketch