import sys
from pathlib import Path
from types import MethodType, SimpleNamespace

import bpy

SOURCE_ROOT = Path(__file__).parents[1] / "src"
sys.path.insert(0, str(SOURCE_ROOT))

from anyimage.operators.common.image_interaction import ImageRegionGesture
from anyimage.operators.common.image_region import RegionPath
from anyimage.operators.cutout_tool import interaction
from anyimage.operators.cutout_tool import main as cutout


class Pie:
    def __init__(self):
        self.calls = []

    def operator(self, identifier, **options):
        operator = SimpleNamespace()
        self.calls.append((identifier, options, operator))
        return operator


class WindowManager:
    def __init__(self):
        self.pie = Pie()

    def popup_menu_pie(self, _event, draw, **_options):
        menu = SimpleNamespace(layout=SimpleNamespace(menu_pie=lambda: self.pie))
        draw(menu, None)


def cutout_context(window_manager, point_spacing=32, generate_normal=False):
    settings = SimpleNamespace(
        cutout_point_spacing=point_spacing,
        cutout_generate_normal=generate_normal,
    )
    return SimpleNamespace(
        window_manager=window_manager,
        scene=SimpleNamespace(anyimage_settings=settings),
    )


def cutout_source(name="Source", size=(2048, 1024)):
    return SimpleNamespace(name=name, data=SimpleNamespace(size=size))


def test_cutout_pie_uses_four_semantic_shapes_in_cardinal_order():
    window_manager = WindowManager()
    context = cutout_context(window_manager)
    source = cutout_source()

    interaction.open_shape_pie(
        context,
        object(),
        source,
        RegionPath(points=((0, 0), (10, 0), (0, 10))),
    )

    assert [call[2].shape for call in window_manager.pie.calls] == [
        "SURFACE",
        "BALLOON",
        "DEPTH_BALLOON",
        "DEPTH_SURFACE",
    ]
    assert [call[1]["text"] for call in window_manager.pie.calls] == [
        "Surface",
        "Balloon",
        "Depth Balloon",
        "Depth Surface",
    ]
    assert all(
        call[0] == "anyimage.cutout_region_to_shape"
        for call in window_manager.pie.calls
    )
    assert not any(call[2].refine_region for call in window_manager.pie.calls)
    assert not any(call[2].generate_normal for call in window_manager.pie.calls)
    assert all(call[2].mesh_resolution == 64 for call in window_manager.pie.calls)


def test_cutout_pie_passes_image_lasso_options_to_every_shape():
    window_manager = WindowManager()
    context = cutout_context(window_manager, point_spacing=16, generate_normal=True)
    source = cutout_source(size=(4096, 2048))

    interaction.open_shape_pie(
        context,
        object(),
        source,
        RegionPath(
            points=((0, 0), (10, 0), (0, 10)),
            invert=True,
        ),
        refine_region=True,
    )

    assert all(call[2].refine_region for call in window_manager.pie.calls)
    assert all(call[2].generate_normal for call in window_manager.pie.calls)
    assert all(
        RegionPath.from_json(call[2].region_path_json).invert
        for call in window_manager.pie.calls
    )
    assert all(call[2].mesh_resolution == 256 for call in window_manager.pie.calls)


def test_cutout_normal_space_is_derived_from_shape():
    assert cutout.normal_mode_for_shape("DEPTH_SURFACE", False) == "NONE"
    assert cutout.normal_mode_for_shape("SURFACE", True) == "TANGENT"
    assert cutout.normal_mode_for_shape("BALLOON", True) == "TANGENT"
    assert cutout.normal_mode_for_shape("DEPTH_BALLOON", True) == "TANGENT"
    assert cutout.normal_mode_for_shape("DEPTH_SURFACE", True) == "OBJECT"


def test_cutout_mesh_detail_tracks_the_source_long_edge_and_clamps():
    assert interaction.cutout_mesh_resolution((4096, 2048), 32) == 128
    assert interaction.cutout_mesh_resolution((16, 8), 4) == 4
    assert interaction.cutout_mesh_resolution((65536, 32768), 4) == 1024


def test_cutout_reuses_image_lasso_gesture_and_double_click_selects_all(monkeypatch):
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new("Source", width=320, height=180)
    source = bpy.data.objects.new("Source", None)
    source.empty_display_type = "IMAGE"
    source.data = image
    bpy.context.collection.objects.link(source)
    window_manager = WindowManager()
    context = cutout_context(window_manager)

    monkeypatch.setattr(
        cutout, "resolve_image_edit_click", lambda *_args: (source, True)
    )
    monkeypatch.setattr(cutout, "video_total_frames", lambda _image: 1)
    monkeypatch.setattr(cutout, "apply_region_settings", lambda *_args: None)
    monkeypatch.setattr(cutout, "validate_cutout_region", lambda *_args: None)

    operator = SimpleNamespace(
        full_image=True,
        refine_region=False,
        report=lambda *_args: None,
    )
    operator.execute = MethodType(cutout.SelectCutoutRegion.execute, operator)
    result = cutout.SelectCutoutRegion.invoke(
        operator, context, SimpleNamespace(value="DOUBLE_CLICK")
    )

    assert issubclass(cutout.SelectCutoutRegion, ImageRegionGesture)
    assert result == {"FINISHED"}
    region_path = RegionPath.from_json(window_manager.pie.calls[0][2].region_path_json)
    assert region_path.points == ((0, 0), (320, 0), (320, 180), (0, 180))
    assert window_manager.pie.calls[0][2].mesh_resolution == 10
    assert not hasattr(cutout, "pending_selection")


def test_cutout_tool_prioritizes_double_click_before_lasso_press():
    assert cutout.CutoutTool.bl_keymap[0][1]["value"] == "DOUBLE_CLICK"
    assert cutout.CutoutTool.bl_keymap[1][1]["value"] == "PRESS"