#!/usr/bin/env python3
import pathlib
import sys

import bpy


def main(output: pathlib.Path) -> None:
    bpy.ops.wm.read_factory_settings(use_empty=True)
    lattice = bpy.data.lattices.new("WebGapLattice")
    lattice.points_u = 3
    lattice.points_v = 2
    lattice.points_w = 2
    lattice.interpolation_type_u = "KEY_LINEAR"
    lattice.interpolation_type_v = "KEY_CARDINAL"
    lattice.interpolation_type_w = "KEY_BSPLINE"
    lattice.use_outside = True
    lattice.vertex_group = "WebGapInfluence"
    lattice_object = bpy.data.objects.new("WebGapLatticeObject", lattice)
    bpy.context.collection.objects.link(lattice_object)
    for index, point in enumerate(lattice.points):
        point.co_deform = (
            point.co.x + 0.125 * (index % 3),
            point.co.y - 0.0625 * (index % 2),
            point.co.z + 0.25 * (index // 6),
        )
        point.weight_softbody = 0.5 + index * 0.125
        point.select = index in {0, len(lattice.points) - 1}
    bpy.ops.wm.save_as_mainfile(filepath=str(output), compress=True)


if __name__ == "__main__":
    arguments = sys.argv[sys.argv.index("--") + 1 :]
    if len(arguments) != 1:
        raise SystemExit("usage: blender -b --python M16-GAP-00010.py -- OUTPUT")
    main(pathlib.Path(arguments[0]).resolve())