import unittest
from pathlib import Path


PROJECT_ROOT = Path(__file__).resolve().parents[1]
SOURCE_ROOT = PROJECT_ROOT / "src" / "anyimage"


class NodeAssetsTest(unittest.TestCase):
    def test_geometry_assets_preserve_node_structure(self):
        import bpy

        from node_asset_test_support import validate_node_structure
        from tools.nodes.arrangement.arrange import arrange_nodes

        bpy.ops.wm.read_factory_settings(use_empty=True)
        with bpy.data.libraries.load(
            str(SOURCE_ROOT / "assets" / "O_AnyImage.blend")
        ) as (source, target):
            target.node_groups = list(source.node_groups)
        groups = [
            group
            for group in target.node_groups
            if group.bl_idname == "GeometryNodeTree"
        ]
        self.assertEqual(len(groups), 6)
        for group in groups:
            validate_node_structure(group)
            positions = {node.name: tuple(node.location) for node in group.nodes
                         if node.bl_idname not in {"NodeReroute", "NodeGroupInput"}}
            arrange_nodes(group)
            for name, position in positions.items():
                for actual, expected in zip(group.nodes[name].location, position):
                    self.assertAlmostEqual(actual, expected, delta=0.01, msg=f"{group.name}: {name}")

    def test_production_code_does_not_create_node_groups(self):
        offenders = []
        for path in SOURCE_ROOT.rglob("*.py"):
            if "bpy.data.node_groups.new" in path.read_text(encoding="utf-8"):
                offenders.append(path.relative_to(PROJECT_ROOT).as_posix())
        self.assertEqual(offenders, [])


if __name__ == "__main__":
    unittest.main()