"""Atari 2600 conversion dispatch."""
from __future__ import annotations
from ... import imageprep
from . import pf

# "pf" = flicker-free 3-colour/scanline; "pf_il" = temporal interlace (two
# frames at 60Hz blend to ~4-6 perceived colours/scanline, at the cost of flicker);
# "mono" = pf restricted to the TIA's greys (one hue's 8 luminances).
MODES = ["pf", "pf_il", "mono"]


def convert_image(path_or_img, mode="pf", palette_name="tia",
                  dither_mode="floyd", intensive=False, prep_opt=None, base_color=None):
    prep_opt = prep_opt or imageprep.PrepOptions()
    img_rgb = imageprep.prepare(path_or_img, pf.WIDTH, pf.HEIGHT,
                                pf.PIXEL_ASPECT, prep_opt, border_rgb=(0, 0, 0))
    return pf.convert(img_rgb, palette_name, dither_mode, intensive,
                      base_color=base_color, interlace=(mode == "pf_il"),
                      gray=(mode == "mono"))