"""Build an Amstrad CPC .sna snapshot from a conversion."""
from __future__ import annotations

from . import snapshot

_EXTS = (".sna",)


def export_sna(conv, output_path, source_path=None, display="forever",
               seconds=0, video="ntsc"):
    if not output_path.lower().endswith(_EXTS):
        output_path += ".sna"
    inks = conv.meta["inks"]
    mode = conv.meta["cpc_mode"]
    sna = snapshot.build_sna(bytes(conv.data), inks, mode, border=inks[0])
    with open(output_path, "wb") as f:
        f.write(sna)
    return output_path