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.common.selection import SelectionPath
from anyimage.common.viewport import ImageSelectionGesture
from anyimage.operators.cutout_tool import interaction
from anyimage.operators.cutout_tool import main as cutout_main


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, mesh_detail="LOW", generate_normal=False):
    settings = SimpleNamespace(
        cutout_mesh_detail=mesh_detail,
        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_two_local_shapes_without_ai(monkeypatch):
    window_manager = WindowManager()
    context = cutout_context(window_manager, generate_normal=True)
    source = cutout_source()
    monkeypatch.setattr(interaction, "ai_ready", lambda: False)

    interaction.open_shape_pie(
        context,
        object(),
        source,
        SelectionPath(points=((0, 0), (10, 0), (0, 10))),
        refine_selection=True,
    )

    assert [call[2].shape for call in window_manager.pie.calls] == [
        "SURFACE",
        "BALLOON",
    ]
    assert [call[1]["text"] for call in window_manager.pie.calls] == [
        "Surface",
        "Balloon",
    ]
    assert all(
        call[0] == "anyimage.cutout_selection_to_shape"
        for call in window_manager.pie.calls
    )
    assert not any(call[2].refine_selection 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_all_ai_shapes(monkeypatch):
    window_manager = WindowManager()
    context = cutout_context(window_manager, mesh_detail="MEDIUM", generate_normal=True)
    source = cutout_source(size=(4096, 2048))
    monkeypatch.setattr(interaction, "ai_ready", lambda: True)

    interaction.open_shape_pie(
        context,
        object(),
        source,
        SelectionPath(
            points=((0, 0), (10, 0), (0, 10)),
            invert=True,
        ),
        refine_selection=True,
    )

    assert [call[2].shape for call in window_manager.pie.calls] == [
        "SURFACE",
        "BALLOON",
        "DEPTH_BALLOON",
        "DEPTH_SURFACE",
    ]
    assert all(call[2].refine_selection for call in window_manager.pie.calls)
    assert all(call[2].generate_normal for call in window_manager.pie.calls)
    assert all(
        SelectionPath.from_json(call[2].selection_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_main.normal_mode_for_shape("DEPTH_SURFACE", False) == "NONE"
    assert cutout_main.normal_mode_for_shape("SURFACE", True) == "TANGENT"
    assert cutout_main.normal_mode_for_shape("BALLOON", True) == "TANGENT"
    assert cutout_main.normal_mode_for_shape("DEPTH_BALLOON", True) == "TANGENT"
    assert cutout_main.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_mesh_detail_maps_to_denser_sampling():
    assert [
        interaction.cutout_mesh_detail_spacing(detail)
        for detail in ("LOW", "MEDIUM", "HIGH", "ULTRA")
    ] == [32, 16, 8, 4]


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_main, "resolve_image_edit_click", lambda *_args: (source, True)
    )
    monkeypatch.setattr(cutout_main, "video_total_frames", lambda _image: 1)
    monkeypatch.setattr(cutout_main, "apply_selection_settings", lambda *_args: None)
    monkeypatch.setattr(cutout_main, "validate_cutout_selection", lambda *_args: None)

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

    assert issubclass(cutout_main.SelectCutoutSelection, ImageSelectionGesture)
    assert result == {"FINISHED"}
    selection_path = SelectionPath.from_json(window_manager.pie.calls[0][2].selection_path_json)
    assert selection_path.points == ((0, 0), (320, 0), (320, 180), (0, 180))
    assert window_manager.pie.calls[0][2].mesh_resolution == 10
    assert not hasattr(cutout_main, "pending_selection")


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