"""Verify point culling removes its dangling wire geometry."""

import bpy

from tools.nodes.common.nodes import interface_socket
from tools.nodes.common.validity import delete_invalid_points


def test_point_culling_removes_wire_edges_without_removing_adjacent_surface():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    mesh = bpy.data.meshes.new("Two Quads")
    mesh.from_pydata([(0, 0, 0), (1, 0, 0), (2, 0, 0),
                      (0, 1, 0), (1, 1, 0), (2, 1, 0)], [],
                     [(0, 1, 4, 3), (1, 2, 5, 4)])
    obj = bpy.data.objects.new("Surface", mesh)
    bpy.context.collection.objects.link(obj)
    group = bpy.data.node_groups.new("Point Culling", "GeometryNodeTree")
    interface_socket(group, "Geometry", "INPUT", "NodeSocketGeometry")
    interface_socket(group, "Geometry", "OUTPUT", "NodeSocketGeometry")
    inlet = group.nodes.new("NodeGroupInput")
    outlet = group.nodes.new("NodeGroupOutput")
    index = group.nodes.new("GeometryNodeInputIndex")
    invalid = group.nodes.new("ShaderNodeMath")
    invalid.operation = "LESS_THAN"
    invalid.inputs[1].default_value = 1
    group.links.new(index.outputs[0], invalid.inputs[0])
    geometry = delete_invalid_points(group, inlet.outputs["Geometry"], invalid.outputs[0])
    group.links.new(geometry, outlet.inputs["Geometry"])
    modifier = obj.modifiers.new("Cull", "NODES")
    modifier.node_group = group
    evaluated = obj.evaluated_get(bpy.context.evaluated_depsgraph_get())
    result = evaluated.to_mesh()
    try:
        assert len(result.polygons) == 1
        assert len(result.edges) == 4
        assert {tuple(vertex.co) for vertex in result.vertices} == {
            (1, 0, 0), (2, 0, 0), (1, 1, 0), (2, 1, 0),
        }
    finally:
        evaluated.to_mesh_clear()