"""Inspect a GLB file's objects, vertex groups, and parent hierarchy."""
import sys
import bpy

if __name__ == "__main__":
    argv = sys.argv
    if "--" not in argv:
        print("Usage: blender --background --python inspect_glb.py -- <input.glb>")
        sys.exit(1)
    args = argv[argv.index("--") + 1:]
    input_path = args[0]

    bpy.ops.wm.read_factory_settings(use_empty=True)
    bpy.ops.import_scene.gltf(filepath=input_path)

    for obj in bpy.context.scene.objects:
        print(f"OBJ: {obj.name}  type={obj.type}  pos={tuple(round(v,3) for v in obj.location)}")
        if obj.type == 'MESH':
            vg_names = [vg.name for vg in obj.vertex_groups]
            print(f"  vertex_groups ({len(vg_names)}): {vg_names[:10]}")
            print(f"  parent: {obj.parent.name if obj.parent else 'None'}")
            print(f"  verts: {len(obj.data.vertices)}")
            # Check skin modifier
            for mod in obj.modifiers:
                print(f"  modifier: {mod.name} type={mod.type} object={mod.object.name if hasattr(mod, 'object') and mod.object else 'None'}")
        if obj.type == 'ARMATURE':
            bones = [b.name for b in obj.data.bones]
            print(f"  bones ({len(bones)}): {bones[:8]}...")
            # Print head bone position if exists
            for b in obj.data.bones:
                if b.name == 'Head':
                    print(f"  Head bone head_local: {tuple(round(v,3) for v in b.head_local)}")