#!/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)
    mesh = bpy.data.meshes.new("WebGapPointCloudSeed")
    mesh.from_pydata([(-1.0, 0.0, 0.0), (0.0, 1.0, 0.5), (1.0, 0.0, 1.0), (0.0, -1.0, 1.5)], [], [])
    obj = bpy.data.objects.new("WebGapPointCloudObject", mesh)
    bpy.context.collection.objects.link(obj)
    bpy.context.view_layer.objects.active = obj
    obj.select_set(True)
    bpy.ops.object.convert(target="POINTCLOUD")
    data = obj.data
    data.name = "WebGapPointCloud"
    radius = data.attributes.new("radius", "FLOAT", "POINT")
    radius.data.foreach_set("value", [0.25, 0.5, 0.75, 1.0])
    bpy.ops.wm.save_as_mainfile(filepath=str(output.resolve()), check_existing=False, compress=True)


if __name__ == "__main__":
    arguments = sys.argv[sys.argv.index("--") + 1 :]
    if len(arguments) != 1:
        raise SystemExit("usage: blender -b --python M16-GAP-00019.py -- OUTPUT")
    main(pathlib.Path(arguments[0]))