"""
Download the Religious Artwork Dataset from Kaggle into data/.

Requires the Kaggle API (pip install kaggle) and either ~/.kaggle/kaggle.json
or the KAGGLE_API_TOKEN environment variable
(create a token at https://www.kaggle.com/settings).

Usage: python data/download.py
"""

import shutil
import subprocess
import sys
import zipfile
from pathlib import Path

DATASET = "zigaklun/religious-artwork-dataset"
DATA = Path(__file__).resolve().parent


def main():
    zip_path = DATA / "religious-artwork-dataset.zip"
    if not zip_path.exists():
        print(f"Downloading {DATASET} (~6 GB) ...")
        r = subprocess.run(["kaggle", "datasets", "download", "-d", DATASET,
                            "-p", str(DATA)])
        if r.returncode != 0:
            sys.exit("kaggle CLI failed — is your Kaggle API token set up?")
    print("Unpacking ...")
    with zipfile.ZipFile(zip_path) as z:
        z.extractall(DATA)

    # Kaggle nests the image folder: images/images/*.jpg -> flatten to images/
    nested = DATA / "images" / "images"
    if nested.is_dir():
        for f in nested.iterdir():
            shutil.move(str(f), DATA / "images" / f.name)
        nested.rmdir()

    n = len(list((DATA / "images").glob("*.jpg")))
    print(f"Done. data/artwork_metadata.csv + data/images/ ({n} images, expected 3997)")


if __name__ == "__main__":
    main()