"""
blender_inspect_vgroups.py
Usage: tooling/blender --background --python tooling/blender_inspect_vgroups.py -- <input.gltf>

Lists vertex groups in a GLTF full-body mesh. Used to verify bone name coverage
for the segmentation script.
"""
import sys
import bpy

if __name__ == "__main__":
    argv = sys.argv
    args = argv[argv.index("--") + 1:]
    bpy.ops.wm.read_factory_settings(use_empty=True)
    bpy.ops.import_scene.gltf(filepath=args[0])
    for obj in bpy.context.scene.objects:
        if obj.type == 'MESH' and obj.vertex_groups:
            print(f"MESH: {obj.name} — {len(obj.vertex_groups)} vertex groups, {len(obj.data.vertices)} vertices")
            for vg in sorted(obj.vertex_groups, key=lambda x: x.name):
                print(f"  VG: {vg.name}")
            break
    else:
        print("No skinned mesh found.")
        for obj in bpy.context.scene.objects:
            print(f"  {obj.name} ({obj.type})")