"""
Unit tests for extraction_face_group_analysis (TASK-044-5)

Tests the ExtractionHandler.face_group_analysis method which
analyzes face groups for feature detection.
"""

import sys
from unittest.mock import MagicMock

import pytest
from blender_addon.application.handlers.extraction import ExtractionHandler


class TestFaceGroupAnalysis:
    def setup_method(self):
        self.mock_bpy = sys.modules["bpy"]
        self.handler = ExtractionHandler()

        # Setup test mesh object
        self.cube = MagicMock()
        self.cube.name = "Cube"
        self.cube.type = "MESH"
        self.cube.data = MagicMock()

        def get_object(name):
            if name == "Cube":
                return self.cube
            return None

        self.mock_bpy.data.objects = MagicMock()
        self.mock_bpy.data.objects.__contains__ = lambda s, name: name == "Cube"
        self.mock_bpy.data.objects.__getitem__ = get_object

    def test_face_group_analysis_object_not_found(self):
        """Test error when object doesn't exist."""
        with pytest.raises(ValueError, match="not found"):
            self.handler.face_group_analysis("NonExistent")

    def test_face_group_analysis_not_mesh(self):
        """Test error when object is not a mesh."""
        camera = MagicMock()
        camera.name = "Camera"
        camera.type = "CAMERA"

        self.mock_bpy.data.objects.__contains__ = lambda s, name: name in ["Cube", "Camera"]
        self.mock_bpy.data.objects.__getitem__ = lambda s, name: camera if name == "Camera" else self.cube

        with pytest.raises(ValueError, match="not a mesh"):
            self.handler.face_group_analysis("Camera")


class TestFaceGroupDetection:
    """Test face group detection heuristics."""

    def setup_method(self):
        self.handler = ExtractionHandler()

    def test_angle_threshold_parameter(self):
        """Test that angle_threshold affects grouping."""
        # Default is 5.0 degrees
        # Lower threshold = stricter coplanarity requirements
        assert True  # Placeholder - full test requires bmesh mocking

    def test_inset_detection(self):
        """Test detection of inset faces."""
        # Inset faces are surrounded by thin quad borders
        assert True  # Placeholder - full test requires bmesh mocking

    def test_extrusion_detection(self):
        """Test detection of extruded regions."""
        # Extrusions have face groups at different height levels
        assert True  # Placeholder - full test requires bmesh mocking
