# src/generate_flashcard_viewer.py

"""
Utility script to generate a standalone HTML viewer for a given
user's flashcard deck. Typically, the Streamlit app calls
app.viewers.generate_flashcard_viewer_for_user directly.
"""

import argparse
from pathlib import Path

from app.viewers import generate_flashcard_viewer_for_user


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("--user", required=True, help="Username")
    parser.add_argument("--deck", required=True, help="Path to deck JSON")
    args = parser.parse_args()

    deck_path = Path(args.deck)
    if not deck_path.exists():
        raise FileNotFoundError(deck_path)

    out_path = generate_flashcard_viewer_for_user(args.user, deck_path)
    print(f"Viewer written to: {out_path}")


if __name__ == "__main__":
    main()