"""Minimal `rembg` runner, invoked as its own subprocess.

We deliberately don't shell out to the official `rembg` CLI: that needs
the `rembg[cli]` extra (aiohttp, gradio, watchdog, ...) just to run a
single background removal. Calling the `remove()` API directly from a
tiny script keeps the image smaller while still giving pipeline.py a
subprocess boundary to apply `nice` and a hard timeout to.
"""

from __future__ import annotations

import sys
from pathlib import Path


def main() -> int:
    if len(sys.argv) != 3:
        print("usage: python -m app.rembg_cli <input> <output>", file=sys.stderr)
        return 2

    from rembg import remove

    input_path = Path(sys.argv[1])
    output_path = Path(sys.argv[2])
    output_path.parent.mkdir(parents=True, exist_ok=True)
    output_path.write_bytes(remove(input_path.read_bytes()))
    return 0


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