"""Build a Commodore VIC-20 autostart cartridge (.a0) from a conversion."""
from __future__ import annotations

import os

from .viewer import assemble

_EXTS = (".a0", ".crt", ".bin", ".rom")


def export_a0(conv, output_path, source_path=None, display="forever",
              seconds=0, video="ntsc"):
    if not output_path.lower().endswith(_EXTS):
        output_path += ".a0"
    rom = assemble.build_cart(conv.data)
    with open(output_path, "wb") as f:
        f.write(rom)
    return output_path