import pathlib
import sys

import bpy


def main(output_path):
    bpy.ops.wm.read_factory_settings(use_empty=True)
    mask = bpy.data.masks.new("WebMask")
    layer = mask.layers.new(name="WebMaskLayer")
    layer.alpha = 0.625
    layer.hide_select = True
    spline = layer.splines.new()
    spline.use_cyclic = True
    spline.use_fill = False
    spline.points.add(2)

    values = [
        ((0.1, 0.2), (0.0, 0.2), (0.2, 0.2), "ALIGNED", 0.25, True),
        ((0.5, 0.7), (0.4, 0.7), (0.6, 0.7), "VECTOR", 0.5, False),
        ((0.8, 0.3), (0.7, 0.3), (0.9, 0.3), "FREE", 0.75, True),
    ]
    for point, value in zip(spline.points, values):
        co, left, right, handle_type, weight, selected = value
        point.co = co
        point.handle_left = left
        point.handle_right = right
        point.handle_type = handle_type
        point.weight = weight
        point.select = selected

    editable_layer = mask.layers.new(name="WebEditableLayer")
    editable_spline = editable_layer.splines.new()
    editable_spline.points.add(1)
    editable_values = [
        ((0.2, 0.2), (0.1, 0.2), (0.35, 0.4)),
        ((0.8, 0.2), (0.65, 0.4), (0.9, 0.2)),
    ]
    for point, (co, left, right) in zip(editable_spline.points, editable_values):
        point.co = co
        point.handle_left = left
        point.handle_right = right
        point.handle_type = "FREE"

    path = pathlib.Path(output_path).resolve()
    path.parent.mkdir(parents=True, exist_ok=True)
    bpy.ops.wm.save_as_mainfile(filepath=str(path), compress=False)
    print(f"mask-fixture-generated path={path} points={len(spline.points)}")


if __name__ == "__main__":
    arguments = sys.argv[sys.argv.index("--") + 1:]
    if len(arguments) != 1:
        raise SystemExit("usage: blender -b --python generate-mask-fixture.py -- output.blend")
    main(arguments[0])