#!/usr/bin/env python3
"""Remove the legacy `Rubric_v1_backup` field from the ABForge HF dataset, and
(optionally) refresh the dataset card.

Usage:
    # 1) make sure the cached HF token is SlowGuess's (write-enabled), e.g.
    #    python -c "from huggingface_hub import login; login()"   # paste token
    #
    # 2) dry run -- only reports which files contain the field (no download of
    #    big files, no changes pushed):
    DRY_RUN=1 /path/to/conda/abforge/bin/python remove_rubric_v1_backup.py
    #
    # 3) apply -- downloads matching files, strips the field, re-uploads, and
    #    updates the card, all in ONE commit:
    DRY_RUN=0 /path/to/conda/abforge/bin/python remove_rubric_v1_backup.py
"""
import os
import json
from pathlib import Path

import requests
from huggingface_hub import HfApi, hf_hub_download, CommitOperationAdd

REPO = "SlowGuess/abforge-data"
FIELD = "Rubric_v1_backup"
CARD_LOCAL = "/gpfs/radev/project/cohan/yz979/xucai/Abforge_Training/abforge_dataset_card.md"
DRY = os.environ.get("DRY_RUN", "1") != "0"

token = Path.home().joinpath(".cache/huggingface/token").read_text().strip()
api = HfApi(token=token)

who = api.whoami()["name"]
print(f"Authenticated as: {who}")
if who != "SlowGuess":
    print("!! WARNING: not SlowGuess -- writes will fail or go to the wrong repo.")

files = [f for f in api.list_repo_files(REPO, repo_type="dataset") if f.endswith(".jsonl")]


def first_row(rel):
    """Fetch just the first line via an HTTP Range request (no full download)."""
    url = f"https://huggingface.co/datasets/{REPO}/resolve/main/{rel}"
    r = requests.get(url, headers={"Authorization": f"Bearer {token}",
                                   "Range": "bytes=0-5000000"}, timeout=120)
    line = r.text.split("\n", 1)[0]
    return json.loads(line)


# --- detect affected files (cheap: first row only) ---
affected = []
print("\n== Detection (first-row probe) ==")
for rel in files:
    try:
        keys = list(first_row(rel).keys())
    except Exception as e:
        print(f"  {rel}: could not probe ({e})")
        continue
    has = FIELD in keys
    other_v1 = [k for k in keys if "v1" in k.lower() and k != FIELD]
    note = f"  [other v1-ish keys: {other_v1}]" if other_v1 else ""
    print(f"  {rel}: {FIELD}={'YES' if has else 'no'}{note}")
    if has:
        affected.append(rel)

print(f"\nAffected files: {affected or '(none)'}")
if not affected:
    print("Nothing to do for the data. (Card can still be updated below.)")

if DRY:
    print("\nDRY RUN -- no files downloaded/rewritten, no commit. "
          "Re-run with DRY_RUN=0 to apply.")
    raise SystemExit(0)

# --- apply: download, strip field, rewrite, collect ops ---
ops = []
for rel in affected:
    print(f"\n-- processing {rel} --")
    local = hf_hub_download(REPO, rel, repo_type="dataset", token=token)
    out = local + ".clean"
    removed = 0
    total = 0
    with open(local, "r", encoding="utf-8") as fin, open(out, "w", encoding="utf-8") as fout:
        for line in fin:
            line = line.rstrip("\n")
            if not line:
                continue
            total += 1
            d = json.loads(line)
            if FIELD in d:
                del d[FIELD]
                removed += 1
            fout.write(json.dumps(d, ensure_ascii=False) + "\n")
    print(f"   rows={total}, removed {FIELD} from {removed} rows -> {out}")
    ops.append(CommitOperationAdd(path_in_repo=rel, path_or_fileobj=out))

# refresh the card too (YAML header + no v1 mention)
if os.path.exists(CARD_LOCAL):
    ops.append(CommitOperationAdd(path_in_repo="README.md", path_or_fileobj=CARD_LOCAL))
    print(f"\nWill also update README.md from {CARD_LOCAL}")

if ops:
    info = api.create_commit(
        repo_id=REPO, repo_type="dataset", operations=ops,
        commit_message="Remove legacy Rubric_v1_backup field; refresh dataset card",
    )
    print("\nCOMMIT DONE:", getattr(info, "commit_url", info))
else:
    print("\nNo operations to commit.")