"""
T3: Inject canonical_names into all skeleton.npz files.

Adds a 'canonical_names' field parallel to 'joint_names' in every
skeleton.npz across all datasets.
"""

import sys
import os
from pathlib import Path
import numpy as np

project_root = Path(__file__).parent.parent
sys.path.insert(0, str(project_root))

from src.data.canonical_names import get_canonical_names, CANONICAL_MAPS
from src.data.zoo_canonical_names import get_zoo_canonical_names


def inject_skeleton(npz_path: Path, dataset_id: str, is_zoo: bool = False):
    """Add canonical_names to a skeleton.npz file."""
    data = dict(np.load(npz_path, allow_pickle=True))
    raw_names = [str(n) for n in data['joint_names']]

    if is_zoo:
        canonical = get_zoo_canonical_names(raw_names)
    else:
        canonical = get_canonical_names(raw_names, dataset_id)

    data['canonical_names'] = np.array(canonical)
    np.savez(npz_path, **data)
    return canonical


def main():
    base = project_root / 'data' / 'processed'

    # Human datasets
    human_datasets = ['humanml3d', 'lafan1', '100style', 'bandai_namco', 'cmu_mocap', 'mixamo']
    for ds in human_datasets:
        skel_path = base / ds / 'skeleton.npz'
        if not skel_path.exists():
            print(f'  SKIP {ds}: skeleton.npz not found')
            continue
        canon = inject_skeleton(skel_path, ds, is_zoo=False)
        print(f'  {ds:15s}: {len(canon)} joints → canonical injected')

    # Zoo: main skeleton.npz + per-species skeletons
    zoo_dir = base / 'truebones_zoo'
    if zoo_dir.exists():
        # Main representative skeleton
        main_skel = zoo_dir / 'skeleton.npz'
        if main_skel.exists():
            canon = inject_skeleton(main_skel, 'truebones_zoo', is_zoo=True)
            print(f'  {"zoo/main":15s}: {len(canon)} joints → canonical injected')

        # Per-species skeletons
        skel_dir = zoo_dir / 'skeletons'
        if skel_dir.exists():
            count = 0
            for f in sorted(skel_dir.glob('*.npz')):
                inject_skeleton(f, 'truebones_zoo', is_zoo=True)
                count += 1
            print(f'  {"zoo/species":15s}: {count} species → canonical injected')

    print('\nDone!')


if __name__ == '__main__':
    main()