"""Atari 7800 conversion dispatch.

The 7800's MARIA chip has its own architecture (display lists + zones + objects),
nothing like ANTIC/GTIA -- but its 160A graphics mode is 2 bits/pixel, 4 px/byte,
exactly the packing of ANTIC mode E (Atari GR.15).  So the per-mode encoders pack
160x192 2bpp bitmaps the same way GR.15 does and reuse the Atari 256-colour NTSC
palette + dither-aware selection; the MARIA-specific display lists are built by
the cartridge packer (viewer/assemble.py).

Modes: ``c160`` = 25-colour 160A (8 MARIA palettes, per-segment palette choice);
``mono`` = luminance two-tone / tinted.
"""
from __future__ import annotations

from ... import imageprep
from . import c160, mono

_MODULES = {"c160": c160, "mono": mono}
MODES = list(_MODULES.keys())


def convert_image(path_or_img, mode="c160", palette_name="ntsc",
                  dither_mode="floyd", intensive=False, prep_opt=None,
                  base_color=None):
    prep_opt = prep_opt or imageprep.PrepOptions()
    module = _MODULES.get(mode, c160)
    img_rgb = imageprep.prepare(path_or_img, module.WIDTH, module.HEIGHT,
                                module.PIXEL_ASPECT, prep_opt, border_rgb=(0, 0, 0))
    return module.convert(img_rgb, palette_name, dither_mode, intensive,
                          base_color=base_color)