# /// script
# requires-python = ">=3.11"
# dependencies = ["huggingface-hub>=1.0", "psutil>=6"]
# ///
from __future__ import annotations
import argparse, json, os, shutil, time
from pathlib import Path
from huggingface_hub import snapshot_download

def emit(p, stage, msg):
    print(json.dumps({"event":"progress","percent":p,"stage":stage,"message":msg}), flush=True)

def main():
    ap=argparse.ArgumentParser()
    ap.add_argument('--repo-id', required=True)
    ap.add_argument('--repo-type', default='model')
    ap.add_argument('--source-prefix', default='')
    ap.add_argument('--target-name', required=True)
    ap.add_argument('--mode', choices=['copy','onnx-only','checkpoints-only'], default='copy')
    ap.add_argument('--dry-run', action='store_true')
    args=ap.parse_args()
    token=os.environ['HF_TOKEN']
    target=Path('/cache/checkpoints')/args.target_name
    target.mkdir(parents=True, exist_ok=True)
    emit(5,'inspect',f'Inspecting {args.repo_id}')
    patterns=[]
    if args.source_prefix: patterns.append(args.source_prefix.rstrip('/')+'/**')
    if args.mode=='onnx-only': patterns += ['**/*.onnx','**/*.onnx_data','**/onnx/**','**/exports/**']
    elif args.mode=='checkpoints-only': patterns += ['runs/**','checkpoints/**','checkpoint-*/**','**/*.safetensors','**/*.bin','**/config.json']
    if args.dry_run:
        (target/'import_plan.json').write_text(json.dumps(vars(args), indent=2))
        emit(100,'completed',f'Dry-run import plan stored at {target}')
        return
    emit(20,'download','Streaming repository files into the cache bucket')
    snapshot_download(repo_id=args.repo_id, repo_type=args.repo_type, token=token, local_dir=target, allow_patterns=patterns or None)
    manifest=[]
    for path in target.rglob('*'):
        if path.is_file(): manifest.append({'path':str(path.relative_to(target)),'size':path.stat().st_size})
    (target/'checkpoint_manifest.json').write_text(json.dumps({'source':args.repo_id,'files':manifest}, indent=2))
    emit(100,'completed',f'Imported {len(manifest)} files into checkpoint {args.target_name}')
if __name__=='__main__': main()