#!/usr/bin/env python3
"""Download verified CheckerBench archives from the Hugging Face dataset repository."""
import argparse
import hashlib
import json
from pathlib import Path

from huggingface_hub import hf_hub_download


def valid(path, entry):
    if not path.is_file() or path.stat().st_size != entry["bytes"]:
        return False
    digest = hashlib.sha256()
    with path.open("rb") as stream:
        for block in iter(lambda: stream.read(8 * 1024**2), b""):
            digest.update(block)
    return digest.hexdigest() == entry["sha256"]


def main():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--repo", default="Benchanything/checkerbench")
    parser.add_argument("--revision", default="main")
    parser.add_argument("--output", type=Path, default=Path("assets"))
    parser.add_argument("--manifest", type=Path, default=Path(__file__).resolve().parents[1] / "release-manifest.json")
    parser.add_argument("--kind", choices=["all", "dataset", "docker-image"], default="all")
    args = parser.parse_args()
    manifest = json.loads(args.manifest.read_text())
    args.output.mkdir(parents=True, exist_ok=True)
    for package in manifest["packages"]:
        if args.kind != "all" and package["kind"] != args.kind:
            continue
        for part in package["parts"]:
            target = args.output / part["name"]
            if not valid(target, part):
                downloaded = Path(hf_hub_download(
                    repo_id=args.repo,
                    repo_type="dataset",
                    revision=args.revision,
                    filename="assets/" + part["name"],
                    local_dir=args.output / ".hub-download",
                ))
                if not valid(downloaded, part):
                    raise SystemExit("Checksum mismatch: " + part["name"])
                downloaded.replace(target)
            print("verified " + part["name"], flush=True)


if __name__ == "__main__":
    main()