#!/usr/bin/env python3
"""Smoke-test generated STRING Parquet configs with the Hugging Face datasets API."""

import argparse
import glob
import sys
from pathlib import Path
from typing import Dict, List


CONFIGS = (
    "species",
    "protein_info",
    "protein_aliases",
    "protein_sequences",
    "protein_links",
)

SPLITS = ("train", "validation", "test")


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(description="Validate local or uploaded STRING HF dataset configs.")
    parser.add_argument(
        "--repo-id",
        default=None,
        help="Optional HF dataset repo id, for example LiteFold/STRING. If omitted, validates local Parquet.",
    )
    parser.add_argument("--data-dir", type=Path, default=Path("data"))
    parser.add_argument("--config", choices=CONFIGS, default="protein_links")
    parser.add_argument("--split", default="train")
    parser.add_argument("--streaming", action="store_true")
    parser.add_argument("--preview-rows", type=int, default=3)
    return parser.parse_args()


def local_data_files(data_dir: Path, config: str) -> Dict[str, List[str]]:
    files: Dict[str, List[str]] = {}
    for split in SPLITS:
        pattern = str(data_dir / config / ("%s-*.parquet" % split))
        matches = sorted(glob.glob(pattern))
        if matches:
            files[split] = matches
    if not files:
        raise SystemExit("No local Parquet files found for config %s under %s" % (config, data_dir))
    return files


def main() -> int:
    args = parse_args()
    try:
        from datasets import load_dataset
    except ImportError as exc:
        raise SystemExit(
            "datasets is required. Install dependencies with: python -m pip install -r requirements.txt"
        ) from exc

    if args.repo_id:
        dataset = load_dataset(args.repo_id, args.config, split=args.split, streaming=args.streaming)
    else:
        files = local_data_files(args.data_dir, args.config)
        if args.split not in files:
            raise SystemExit(
                "Split %s is not present locally for config %s. Available splits: %s"
                % (args.split, args.config, ", ".join(sorted(files)))
            )
        dataset = load_dataset("parquet", data_files=files, split=args.split, streaming=args.streaming)

    print("config:", args.config)
    print("split:", args.split)
    print("features:", dataset.features)

    if args.streaming:
        iterator = iter(dataset)
        for index in range(args.preview_rows):
            try:
                print("row[%d]:" % index, next(iterator))
            except StopIteration:
                break
    else:
        print("num_rows:", len(dataset))
        for index in range(min(args.preview_rows, len(dataset))):
            print("row[%d]:" % index, dataset[index])

    return 0


if __name__ == "__main__":
    sys.exit(main())