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

import bpy


def mesh(name):
    data = bpy.data.meshes.new(f"{name}Mesh")
    data.from_pydata(
        [(-1.0, -1.0, 0.0), (1.0, -1.0, 0.0), (1.0, 1.0, 0.0), (-1.0, 1.0, 0.0)],
        [],
        [(0, 1, 2, 3)],
    )
    return data


def animated_object(name, action_name, location_offset):
    obj = bpy.data.objects.new(name, mesh(name))
    bpy.context.scene.collection.objects.link(obj)
    for frame, location in (
        (1, location_offset),
        (3, tuple(value + 1.0 for value in location_offset)),
        (5, tuple(value + 2.0 for value in location_offset)),
    ):
        obj.location = location
        obj.keyframe_insert(data_path="location", frame=frame, index=-1)
    obj.animation_data.action.name = action_name
    return obj


def main():
    arguments = sys.argv[sys.argv.index("--") + 1 :]
    if len(arguments) != 1:
        raise SystemExit("usage: blender -b --factory-startup --python M16-GAP-00172.py -- OUTPUT")
    bpy.ops.wm.read_factory_settings(use_empty=True)

    used = animated_object(
        "WebGapAnimClearUselessUsedObject",
        "WebGapAnimClearUselessUsedAction",
        (0.0, 0.0, 0.0),
    )

    library = animated_object(
        "WebGapAnimClearUselessLibraryObject",
        "WebGapAnimClearUselessLibraryAction",
        (10.0, 0.0, 0.0),
    )
    library_action = library.animation_data.action
    library.animation_data.action = None
    library_action.use_fake_user = True

    empty_action = bpy.data.actions.new("WebGapAnimClearUselessEmptyAction")
    empty_action.use_fake_user = True

    bpy.context.scene.frame_start = 1
    bpy.context.scene.frame_end = 5
    bpy.context.scene.frame_preview_start = 1
    bpy.context.scene.frame_preview_end = 5
    bpy.ops.anim.clear_useless_actions()
    bpy.ops.wm.save_as_mainfile(
        filepath=str(pathlib.Path(arguments[0]).resolve()), check_existing=False, compress=True
    )


if __name__ == "__main__":
    main()