import pathlib
import sys

import bpy


def main(output_path: str, image_path: str) -> None:
    bpy.ops.wm.read_factory_settings(use_empty=True)

    mesh = bpy.data.meshes.new("PackedImageMesh")
    mesh.from_pydata([(-1.0, -1.0, 0.0), (1.0, -1.0, 0.0), (0.0, 1.0, 0.0)], [], [(0, 1, 2)])
    mesh.update()
    obj = bpy.data.objects.new("PackedImageObject", mesh)
    bpy.context.collection.objects.link(obj)

    material = bpy.data.materials.new("PackedImageMaterial")
    material.use_nodes = True
    texture = material.node_tree.nodes.new("ShaderNodeTexImage")
    texture.image = bpy.data.images.load(str(pathlib.Path(image_path).resolve()), check_existing=False)
    texture.image.name = "PackedTexture"
    material.node_tree.links.new(texture.outputs["Color"], material.node_tree.nodes["Principled BSDF"].inputs["Base Color"])
    mesh.materials.append(material)

    bpy.context.view_layer.objects.active = obj
    obj.select_set(True)
    bpy.ops.file.pack_all()
    if not texture.image.packed_file:
        raise RuntimeError("Blender did not pack the texture")
    bpy.ops.wm.save_as_mainfile(filepath=output_path, compress=True)


if __name__ == "__main__":
    if "--" not in sys.argv or len(sys.argv) <= sys.argv.index("--") + 2:
        raise SystemExit("usage: blender -b --python generate-packed-image-fixture.py -- output.blend image.png")
    arguments = sys.argv[sys.argv.index("--") + 1:]
    main(arguments[0], arguments[1])