from __future__ import annotations

from pathlib import Path

from faster_whisper.utils import download_model


MODEL_SIZE = "small"
MODEL_DIR = Path(__file__).resolve().parent.parent / "models" / f"faster-whisper-{MODEL_SIZE}"
REQUIRED_FILES = ("config.json", "model.bin", "tokenizer.json", "vocabulary.txt")


def main() -> int:
    missing = [name for name in REQUIRED_FILES if not (MODEL_DIR / name).is_file()]
    if not missing:
        print(f"Whisper model already exists: {MODEL_DIR}")
        return 0

    MODEL_DIR.mkdir(parents=True, exist_ok=True)
    print(f"Downloading faster-whisper-{MODEL_SIZE} to {MODEL_DIR} ...")
    download_model(MODEL_SIZE, output_dir=str(MODEL_DIR))
    missing = [name for name in REQUIRED_FILES if not (MODEL_DIR / name).is_file()]
    if missing:
        raise RuntimeError(f"Whisper model download is incomplete; missing: {', '.join(missing)}")
    print(f"Whisper model is ready: {MODEL_DIR}")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())