import numpy as np
import unittest
from unittest.mock import MagicMock
import sys
from pathlib import Path

# Add workspace directory to sys.path to resolve root package name (NodeSlicer)
PROJECT_ROOT = Path(__file__).resolve().parent.parent
sys.path.append(str(PROJECT_ROOT.parent))

# Define dummy classes to avoid metaclass conflicts
class DummyNodeSocket: pass
class DummyNode: pass
class DummyObject: pass
class DummyMesh: pass
class DummyNodeSocketShader: pass
class DummyNodeCustomGroup: pass
class DummyNodeTree: pass
class DummyOperator: pass
class DummyMenu: pass
class DummyPanel: pass
class DummyPropertyGroup: pass

mock_types = MagicMock()
mock_types.NodeSocket = DummyNodeSocket
mock_types.Node = DummyNode
mock_types.Object = DummyObject
mock_types.Mesh = DummyMesh
mock_types.NodeSocketShader = DummyNodeSocketShader
mock_types.NodeCustomGroup = DummyNodeCustomGroup
mock_types.NodeTree = DummyNodeTree
mock_types.Operator = DummyOperator
mock_types.Menu = DummyMenu
mock_types.Panel = DummyPanel
mock_types.PropertyGroup = DummyPropertyGroup

# Mock bpy and its subpackages before importing core modules
mock_bpy = MagicMock()
mock_bpy.context.scene = MagicMock()
mock_bpy.context.scene.unit_settings.scale_length = 0.001
mock_bpy.types = mock_types

sys.modules['bpy'] = mock_bpy
sys.modules['bpy.types'] = mock_types
sys.modules['bpy.props'] = MagicMock()
sys.modules['bpy.utils'] = MagicMock()
sys.modules['bpy.utils.previews'] = MagicMock()
sys.modules['bpy.app'] = MagicMock()
sys.modules['bpy.app.handlers'] = MagicMock()

# Import the actual classes to test
from NodeSlicer.core.nodeslicer.nodes.mesh import SLICENODE_ArrangeMesh  # pyright: ignore[reportMissingImports]
from NodeSlicer.infra.blender.blender_mesh_capture import SlicingGroup, SlicingCollection, SlicingObject  # pyright: ignore[reportMissingImports]

class TestArrangeMesh(unittest.TestCase):
    def test_arrange_mesh_simple(self):
        # Create a SlicingObject with a single triangle
        so = SlicingObject()
        so.name = "part1"
        so.mesh = np.array([[[10.0, 10.0, 0.0],
                             [20.0, 10.0, 0.0],
                             [15.0, 20.0, 0.0],
                             [0.0, 0.0, 1.0]]], dtype=np.float64)
        
        # Create SlicingCollection
        sc = SlicingCollection([], "coll1")
        sc.objects = [so]
        
        # Create SlicingGroup
        sg = SlicingGroup([])
        sg.collections = {"coll1": sc}
        
        # Mock node inputs resolution
        node = SLICENODE_ArrangeMesh()
        node.method = 'NFP'
        
        # We override resolve to simulate inputs
        def mock_resolve(fieldname):
            if fieldname == "Slicing Group":
                return sg
            elif fieldname == "Bed X":
                return 250.0
            elif fieldname == "Bed Y":
                return 250.0
            elif fieldname == "Spacing":
                return 2.0
            return None
            
        node.resolve = mock_resolve
        
        # Evaluate output
        result_group = node.evaluate_output("Slicing Group")
        self.assertIsNotNone(result_group)
        self.assertIn("coll1", result_group.collections)
        
        arranged_sc = result_group.collections["coll1"]
        # The bounding box should now be centered on the 250x250 bed
        self.assertEqual(arranged_sc.min_x, 120.0)
        self.assertEqual(arranged_sc.min_y, 120.0)
        self.assertEqual(arranged_sc.max_x, 130.0)
        self.assertEqual(arranged_sc.max_y, 130.0)
        
        # Check normal remains unchanged
        self.assertTrue(np.allclose(arranged_sc.objects[0].mesh[0, 3, :], [0.0, 0.0, 1.0]))

    def test_arrange_mesh_bl(self):
        so = SlicingObject()
        so.name = "part1"
        so.mesh = np.array([[[10.0, 10.0, 0.0],
                             [20.0, 10.0, 0.0],
                             [15.0, 20.0, 0.0],
                             [0.0, 0.0, 1.0]]], dtype=np.float64)
        
        sc = SlicingCollection([], "coll1")
        sc.objects = [so]
        sg = SlicingGroup([])
        sg.collections = {"coll1": sc}
        
        node = SLICENODE_ArrangeMesh()
        node.method = 'BL'
        
        def mock_resolve(fieldname):
            if fieldname == "Slicing Group":
                return sg
            elif fieldname == "Bed X":
                return 250.0
            elif fieldname == "Bed Y":
                return 250.0
            elif fieldname == "Spacing":
                return 2.0
            return None
        node.resolve = mock_resolve
        
        result_group = node.evaluate_output("Slicing Group")
        self.assertIsNotNone(result_group)
        arranged_sc = result_group.collections["coll1"]
        self.assertGreaterEqual(arranged_sc.min_x, 0.0)
        self.assertGreaterEqual(arranged_sc.min_y, 0.0)

    def test_arrange_mesh_djd(self):
        so = SlicingObject()
        so.name = "part1"
        so.mesh = np.array([[[10.0, 10.0, 0.0],
                             [20.0, 10.0, 0.0],
                             [15.0, 20.0, 0.0],
                             [0.0, 0.0, 1.0]]], dtype=np.float64)
        
        sc = SlicingCollection([], "coll1")
        sc.objects = [so]
        sg = SlicingGroup([])
        sg.collections = {"coll1": sc}
        
        node = SLICENODE_ArrangeMesh()
        node.method = 'DJD'
        
        def mock_resolve(fieldname):
            if fieldname == "Slicing Group":
                return sg
            elif fieldname == "Bed X":
                return 250.0
            elif fieldname == "Bed Y":
                return 250.0
            elif fieldname == "Spacing":
                return 2.0
            return None
        node.resolve = mock_resolve
        
        result_group = node.evaluate_output("Slicing Group")
        self.assertIsNotNone(result_group)
        arranged_sc = result_group.collections["coll1"]
        self.assertEqual(arranged_sc.min_x, 120.0)
        self.assertEqual(arranged_sc.min_y, 120.0)

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