"""rename_clip.py — rename the animation inside a GLB (for dance-code adoption).

Used when a provisional dance (nd##) is adopted and gets its final dance code
(see docs/dances/REGISTRY.md). Renames the clip baked into the GLB; the pack
rename is just the output filename.

Usage:
  blender --background --python tools/rename_clip.py -- \
    --src <in.glb> --out <out.glb> --name <NewClipName>
"""
import bpy, sys, argparse

def parse():
    argv = sys.argv[sys.argv.index("--")+1:] if "--" in sys.argv else []
    p = argparse.ArgumentParser()
    p.add_argument("--src", required=True)
    p.add_argument("--out", required=True)
    p.add_argument("--name", required=True)
    return p.parse_args(argv)

def main():
    a = parse()
    bpy.ops.wm.read_factory_settings(use_empty=True)
    bpy.ops.import_scene.gltf(filepath=a.src)
    arm = next(o for o in bpy.data.objects if o.type == 'ARMATURE')
    act = arm.animation_data.action
    if getattr(act, "slots", None) and arm.animation_data.action_slot is None:
        arm.animation_data.action_slot = act.slots[0]
    old = act.name
    act.name = a.name

    for t in list(arm.animation_data.nla_tracks):
        arm.animation_data.nla_tracks.remove(t)
    track = arm.animation_data.nla_tracks.new()
    track.name = a.name
    strip = track.strips.new(a.name, 0, act)
    strip.name = a.name
    arm.animation_data.action = None

    for o in [o for o in bpy.data.objects if o.type == 'MESH']:
        bpy.data.objects.remove(o, do_unlink=True)

    bpy.ops.export_scene.gltf(
        filepath=a.out,
        export_animation_mode="NLA_TRACKS",
        export_force_sampling=True,
        export_optimize_animation_size=False,
    )
    print(f"[rename_clip] '{old}' -> '{a.name}'  EXPORTED {a.out}")

if __name__ == "__main__":
    main()