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

import bpy


def mesh_object(name: str, vertices, faces):
    mesh = bpy.data.meshes.new(name + "Mesh")
    mesh.from_pydata(vertices, [], faces)
    mesh.update()
    obj = bpy.data.objects.new(name, mesh)
    bpy.context.collection.objects.link(obj)
    return obj


def main(output: pathlib.Path) -> None:
    bpy.ops.wm.read_factory_settings(use_empty=True)
    source = mesh_object(
        "WebGapArrayObject",
        [(-0.5, -0.5, 0.0), (0.5, -0.5, 0.0), (0.5, 0.5, 0.0), (-0.5, 0.5, 0.0)],
        [(0, 1, 2, 3)],
    )
    start_cap = mesh_object(
        "WebGapArrayStartCap",
        [(-0.4, -0.4, 0.0), (0.4, -0.4, 0.0), (0.0, 0.4, 0.0)],
        [(0, 1, 2)],
    )
    end_cap = mesh_object(
        "WebGapArrayEndCap",
        [(-0.4, -0.4, 0.0), (0.4, -0.4, 0.0), (0.0, 0.4, 0.0)],
        [(0, 1, 2)],
    )
    start_cap.location.x = -2.0
    end_cap.location.x = 5.0
    modifier = source.modifiers.new(name="WebGapArray", type="ARRAY")
    modifier.count = 4
    modifier.relative_offset_displace = (1.25, 0.0, 0.0)
    modifier.start_cap = start_cap
    modifier.end_cap = end_cap
    modifier.show_viewport = True
    modifier.show_render = False
    modifier.show_in_editmode = True
    modifier.show_on_cage = False
    bpy.context.view_layer.objects.active = source
    source.select_set(True)
    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-00031.py -- OUTPUT")
    main(pathlib.Path(arguments[0]))