import os
import io
import json
import pandas as pd
from huggingface_hub import HfApi

def _as_parquet_bytes(record: dict) -> bytes:
    df = pd.DataFrame([record])
    buf = io.BytesIO()
    df.to_parquet(buf, index=False)
    return buf.getvalue()

def persist_to_hf(
    dataset_repo: str,
    record: dict,
    anon_pdf_bytes: bytes,
    parquet_path: str,
    json_path: str,
    pdf_path: str,
):
    token = os.environ.get("HF_TOKEN")
    if not token:
        return {"error": "HF_TOKEN not set"}

    api = HfApi(token=token)

    pq_bytes = _as_parquet_bytes(record)
    api.upload_file(
        path_or_fileobj=pq_bytes,
        path_in_repo=parquet_path,
        repo_id=dataset_repo,
        repo_type="dataset",
        commit_message="Add candidate parquet record",
    )

    js_bytes = json.dumps(record, ensure_ascii=False, indent=2).encode("utf-8")
    api.upload_file(
        path_or_fileobj=js_bytes,
        path_in_repo=json_path,
        repo_id=dataset_repo,
        repo_type="dataset",
        commit_message="Add candidate JSON record",
    )

    api.upload_file(
        path_or_fileobj=anon_pdf_bytes,
        path_in_repo=pdf_path,
        repo_id=dataset_repo,
        repo_type="dataset",
        commit_message="Add anonymized PDF",
    )

    return {"status": "ok", "dataset_repo": dataset_repo, "files": [parquet_path, json_path, pdf_path]}