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

import bpy


def new_action(obj):
    bpy.context.view_layer.objects.active = obj
    obj.select_set(True)
    window = bpy.context.window
    screen = window.screen
    area = next(candidate for candidate in screen.areas if candidate.type == "DOPESHEET_EDITOR")
    area.spaces.active.ui_mode = "ACTION"
    region = next(candidate for candidate in area.regions if candidate.type == "WINDOW")
    with bpy.context.temp_override(window=window, screen=screen, area=area, region=region):
        if not bpy.ops.action.new.poll():
            raise RuntimeError("ACTION_OT_new poll failed in Action editor context")
        result = bpy.ops.action.new()
        if "FINISHED" not in result:
            raise RuntimeError(f"ACTION_OT_new returned {result}")


if __name__ == "__main__":
    arguments = sys.argv[sys.argv.index("--") + 1:]
    if len(arguments) != 1:
        raise SystemExit("usage: blender -b --factory-startup --python M16-GAP-00129.py -- OUTPUT")
    bpy.ops.wm.read_factory_settings(use_empty=True)
    mesh = bpy.data.meshes.new("WebGapActionNewMesh")
    mesh.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)],
    )
    obj = bpy.data.objects.new("WebGapActionNewObject", mesh)
    bpy.context.scene.collection.objects.link(obj)
    obj.location = (1.0, 2.0, 3.0)
    obj.keyframe_insert(data_path="location", frame=1, index=-1)
    old_name = obj.animation_data.action.name
    old_actions = {action.name for action in bpy.data.actions}
    new_action(obj)
    created = [action for action in bpy.data.actions if action.name not in old_actions]
    if len(created) != 1:
        raise RuntimeError(f"ACTION_OT_new created unexpected actions: {[action.name for action in created]}")
    obj.animation_data.action = created[0]
    if obj.animation_data.action.name == old_name:
        raise RuntimeError("ACTION_OT_new did not assign a new action")
    bpy.ops.wm.save_as_mainfile(
        filepath=str(pathlib.Path(arguments[0]).resolve()), check_existing=False, compress=True
    )