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

import bpy


ACTION_NAME = "WebGapAnimConstraintSlotAction"
OBJECT_NAME = "WebGapAnimConstraintSlotObject"
CONSTRAINT_NAME = "WebGapActionSlotConstraint"
SLOT_NAME = "WebGapConstraintSlot"


def main():
    arguments = sys.argv[sys.argv.index("--") + 1 :]
    if len(arguments) != 1:
        raise SystemExit("usage: blender -b --factory-startup --python M16-GAP-00208.py -- OUTPUT")
    bpy.ops.wm.read_factory_settings(use_empty=True)
    mesh = bpy.data.meshes.new(f"{OBJECT_NAME}Mesh")
    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(OBJECT_NAME, mesh)
    bpy.context.scene.collection.objects.link(obj)
    action = bpy.data.actions.new(ACTION_NAME)
    slot = action.slots.new("OBJECT", SLOT_NAME)
    action.use_fake_user = True
    constraint = obj.constraints.new(type="ACTION")
    constraint.name = CONSTRAINT_NAME
    constraint.target = obj
    constraint.action = action
    constraint.action_slot = slot
    bpy.context.view_layer.objects.active = obj
    obj.select_set(True)
    bpy.context.scene.frame_start = 1
    bpy.context.scene.frame_end = 5
    bpy.context.scene.frame_set(3)
    bpy.ops.wm.save_as_mainfile(
        filepath=str(pathlib.Path(arguments[0]).resolve()), check_existing=False, compress=True
    )


if __name__ == "__main__":
    main()