#include "Features/Inspector/Components/IInspectorComponentEditor.h"
#include "Features/Inspector/Components/InspectorComponentEditorRegistry.h"
#include "Features/Inspector/InspectorPresentationModel.h"
#include "Features/Inspector/InspectorSubject.h"
#include "Scene/EditorSceneRuntime.h"

#include <XCEngine/Components/CameraComponent.h>
#include <XCEngine/Components/GameObject.h>
#include <XCEngine/Core/Asset/ResourceManager.h>
#include <XCEngine/Scene/Scene.h>
#include <XCEngine/Scene/SceneManager.h>

#include <gtest/gtest.h>

#include <chrono>
#include <filesystem>

namespace XCEngine::UI::Editor::App {
namespace {

using ::XCEngine::Components::GameObject;
using ::XCEngine::Components::Scene;
using ::XCEngine::Components::SceneManager;
using Widgets::UIEditorPropertyGridField;
using Widgets::UIEditorPropertyGridSection;

class ScopedSceneManagerReset final {
public:
    ScopedSceneManagerReset() {
        Reset();
    }

    ~ScopedSceneManagerReset() {
        Reset();
        ::XCEngine::Resources::ResourceManager::Get().Shutdown();
    }

private:
    static void Reset() {
        SceneManager& manager = SceneManager::Get();
        const auto scenes = manager.GetAllScenes();
        for (Scene* scene : scenes) {
            manager.UnloadScene(scene);
        }
    }
};

class TemporaryProjectRoot final {
public:
    TemporaryProjectRoot() {
        const auto uniqueSuffix =
            std::chrono::steady_clock::now().time_since_epoch().count();
        m_root =
            std::filesystem::temp_directory_path() /
            ("xcui_inspector_presentation_" + std::to_string(uniqueSuffix));
    }

    ~TemporaryProjectRoot() {
        std::error_code errorCode = {};
        std::filesystem::remove_all(m_root, errorCode);
    }

    const std::filesystem::path& Root() const {
        return m_root;
    }

    std::filesystem::path MainScenePath() const {
        return m_root / "Assets" / "Scenes" / "Main.xc";
    }

private:
    std::filesystem::path m_root = {};
};

void SaveMainScene(const TemporaryProjectRoot& projectRoot) {
    const std::filesystem::path scenePath = projectRoot.MainScenePath();
    std::filesystem::create_directories(scenePath.parent_path());

    Scene scene("Main");
    GameObject* parent = scene.CreateGameObject("Parent");
    ASSERT_NE(parent, nullptr);
    ASSERT_NE(parent->GetTransform(), nullptr);
    parent->GetTransform()->SetLocalPosition(::XCEngine::Math::Vector3(1.0f, 2.0f, 3.0f));
    parent->GetTransform()->SetLocalScale(::XCEngine::Math::Vector3(4.0f, 5.0f, 6.0f));
    ASSERT_NE(scene.CreateGameObject("Child", parent), nullptr);
    ASSERT_NE(parent->AddComponent<::XCEngine::Components::CameraComponent>(), nullptr);
    scene.Save(scenePath.string());
}

const UIEditorPropertyGridSection* FindSection(
    const InspectorPresentationModel& model,
    std::string_view title) {
    for (const UIEditorPropertyGridSection& section : model.sections) {
        if (section.title == title) {
            return &section;
        }
    }

    return nullptr;
}

const UIEditorPropertyGridField* FindField(
    const UIEditorPropertyGridSection& section,
    std::string_view label) {
    for (const UIEditorPropertyGridField& field : section.fields) {
        if (field.label == label) {
            return &field;
        }
    }

    return nullptr;
}

const InspectorPresentationComponentBinding* FindBinding(
    const InspectorPresentationModel& model,
    std::string_view typeName) {
    for (const InspectorPresentationComponentBinding& binding :
         model.componentBindings) {
        if (binding.typeName == typeName) {
            return &binding;
        }
    }

    return nullptr;
}

TEST(InspectorPresentationModelTests, EmptySubjectBuildsDefaultEmptyState) {
    EditorSceneRuntime runtime = {};
    const InspectorPresentationModel model =
        BuildInspectorPresentationModel(
            {},
            runtime,
            InspectorComponentEditorRegistry::Get());

    EXPECT_FALSE(model.hasSelection);
    EXPECT_EQ(model.title, "Nothing selected");
    EXPECT_EQ(model.subtitle, "Select a hierarchy item or project asset.");
    EXPECT_TRUE(model.sections.empty());
    EXPECT_TRUE(model.componentBindings.empty());
}

TEST(InspectorPresentationModelTests, ProjectAssetSubjectBuildsIdentityAndLocationSections) {
    InspectorSubject subject = {};
    subject.kind = InspectorSubjectKind::ProjectAsset;
    subject.source = InspectorSelectionSource::Project;
    subject.projectAsset.selection.kind = EditorSelectionKind::ProjectItem;
    subject.projectAsset.selection.itemId = "asset:materials/test";
    subject.projectAsset.selection.displayName = "TestMaterial";
    subject.projectAsset.selection.absolutePath =
        std::filesystem::path("D:/Xuanchi/Main/XCEngine/project/Assets/Materials/Test.mat");

    EditorSceneRuntime runtime = {};
    const InspectorPresentationModel model =
        BuildInspectorPresentationModel(
            subject,
            runtime,
            InspectorComponentEditorRegistry::Get());

    ASSERT_TRUE(model.hasSelection);
    EXPECT_EQ(model.title, "TestMaterial");
    EXPECT_EQ(model.subtitle, "Asset");
    ASSERT_EQ(model.sections.size(), 2u);

    const auto* identity = FindSection(model, "Identity");
    ASSERT_NE(identity, nullptr);
    ASSERT_EQ(identity->fields.size(), 3u);
    const auto* typeField = FindField(*identity, "Type");
    const auto* nameField = FindField(*identity, "Name");
    const auto* idField = FindField(*identity, "Id");
    ASSERT_NE(typeField, nullptr);
    ASSERT_NE(nameField, nullptr);
    ASSERT_NE(idField, nullptr);
    EXPECT_EQ(typeField->valueText, "Asset");
    EXPECT_EQ(nameField->valueText, "TestMaterial");
    EXPECT_EQ(idField->valueText, "asset:materials/test");

    const auto* location = FindSection(model, "Location");
    ASSERT_NE(location, nullptr);
    ASSERT_EQ(location->fields.size(), 1u);
    const auto* pathField = FindField(*location, "Path");
    ASSERT_NE(pathField, nullptr);
    EXPECT_NE(
        pathField->valueText.find("Assets/Materials/Test.mat"),
        std::string::npos);
}

TEST(InspectorPresentationModelTests, SceneObjectSubjectBuildsRegisteredComponentSections) {
    ScopedSceneManagerReset reset = {};
    TemporaryProjectRoot projectRoot = {};
    SaveMainScene(projectRoot);

    EditorSceneRuntime runtime = {};
    ASSERT_TRUE(runtime.Initialize(projectRoot.Root()));
    Scene* scene = runtime.GetActiveScene();
    ASSERT_NE(scene, nullptr);
    GameObject* parent = scene->Find("Parent");
    ASSERT_NE(parent, nullptr);
    ASSERT_TRUE(runtime.SetSelection(parent->GetID()));

    const InspectorSubject subject =
        BuildInspectorSubject(EditorSession{}, runtime);
    ASSERT_EQ(subject.kind, InspectorSubjectKind::SceneObject);

    const InspectorPresentationModel model =
        BuildInspectorPresentationModel(
            subject,
            runtime,
            InspectorComponentEditorRegistry::Get());

    ASSERT_TRUE(model.hasSelection);
    EXPECT_EQ(model.title, "Parent");
    EXPECT_EQ(model.subtitle, "GameObject");
    ASSERT_EQ(model.sections.size(), 4u);
    ASSERT_EQ(model.componentBindings.size(), 2u);

    const auto* identity = FindSection(model, "Identity");
    ASSERT_NE(identity, nullptr);
    const auto* sceneTypeField = FindField(*identity, "Type");
    const auto* sceneNameField = FindField(*identity, "Name");
    const auto* sceneIdField = FindField(*identity, "Id");
    ASSERT_NE(sceneTypeField, nullptr);
    ASSERT_NE(sceneNameField, nullptr);
    ASSERT_NE(sceneIdField, nullptr);
    EXPECT_EQ(sceneTypeField->valueText, "GameObject");
    EXPECT_EQ(sceneNameField->valueText, "Parent");
    EXPECT_EQ(sceneIdField->valueText, runtime.GetSelectedItemId());

    const auto* hierarchy = FindSection(model, "Hierarchy");
    ASSERT_NE(hierarchy, nullptr);
    const auto* childrenField = FindField(*hierarchy, "Children");
    const auto* parentField = FindField(*hierarchy, "Parent");
    ASSERT_NE(childrenField, nullptr);
    ASSERT_NE(parentField, nullptr);
    EXPECT_EQ(childrenField->valueText, "1");
    EXPECT_EQ(parentField->valueText, "Scene Root");

    const auto* transform = FindSection(model, "Transform");
    ASSERT_NE(transform, nullptr);
    const auto* positionField = FindField(*transform, "Position");
    const auto* rotationField = FindField(*transform, "Rotation");
    const auto* scaleField = FindField(*transform, "Scale");
    ASSERT_NE(positionField, nullptr);
    ASSERT_NE(rotationField, nullptr);
    ASSERT_NE(scaleField, nullptr);
    EXPECT_EQ(positionField->kind, Widgets::UIEditorPropertyGridFieldKind::Vector3);
    EXPECT_DOUBLE_EQ(positionField->vector3Value.values[0], 1.0);
    EXPECT_DOUBLE_EQ(positionField->vector3Value.values[1], 2.0);
    EXPECT_DOUBLE_EQ(positionField->vector3Value.values[2], 3.0);
    EXPECT_EQ(rotationField->kind, Widgets::UIEditorPropertyGridFieldKind::Vector3);
    EXPECT_EQ(scaleField->kind, Widgets::UIEditorPropertyGridFieldKind::Vector3);
    EXPECT_DOUBLE_EQ(scaleField->vector3Value.values[0], 4.0);
    EXPECT_DOUBLE_EQ(scaleField->vector3Value.values[1], 5.0);
    EXPECT_DOUBLE_EQ(scaleField->vector3Value.values[2], 6.0);

    const auto* camera = FindSection(model, "Camera");
    ASSERT_NE(camera, nullptr);
    const auto* projectionField = FindField(*camera, "Projection");
    const auto* primaryField = FindField(*camera, "Primary");
    const auto* clearColorField = FindField(*camera, "Clear Color");
    ASSERT_NE(projectionField, nullptr);
    ASSERT_NE(primaryField, nullptr);
    ASSERT_NE(clearColorField, nullptr);
    EXPECT_EQ(projectionField->kind, Widgets::UIEditorPropertyGridFieldKind::Enum);
    EXPECT_EQ(projectionField->enumValue.selectedIndex, 0u);
    EXPECT_EQ(primaryField->kind, Widgets::UIEditorPropertyGridFieldKind::Bool);
    EXPECT_TRUE(primaryField->boolValue);
    EXPECT_EQ(clearColorField->kind, Widgets::UIEditorPropertyGridFieldKind::Color);

    const auto* transformBinding = FindBinding(model, "Transform");
    const auto* cameraBinding = FindBinding(model, "Camera");
    ASSERT_NE(transformBinding, nullptr);
    ASSERT_NE(cameraBinding, nullptr);
    EXPECT_FALSE(transformBinding->removable);
    EXPECT_TRUE(cameraBinding->removable);
    EXPECT_EQ(transformBinding->fieldIds.size(), 3u);
    EXPECT_GE(cameraBinding->fieldIds.size(), 8u);
}

TEST(InspectorPresentationModelTests, CameraSkyboxMaterialBuildsAssetField) {
    ScopedSceneManagerReset reset = {};
    TemporaryProjectRoot projectRoot = {};
    SaveMainScene(projectRoot);

    EditorSceneRuntime runtime = {};
    ASSERT_TRUE(runtime.Initialize(projectRoot.Root()));
    Scene* scene = runtime.GetActiveScene();
    ASSERT_NE(scene, nullptr);
    GameObject* parent = scene->Find("Parent");
    ASSERT_NE(parent, nullptr);
    auto* camera = parent->GetComponent<::XCEngine::Components::CameraComponent>();
    ASSERT_NE(camera, nullptr);
    camera->SetSkyboxEnabled(true);
    camera->SetSkyboxMaterialPath("Assets/Materials/Skybox.mat");
    ASSERT_TRUE(runtime.SetSelection(parent->GetID()));

    const InspectorPresentationModel model =
        BuildInspectorPresentationModel(
            BuildInspectorSubject(EditorSession{}, runtime),
            runtime,
            InspectorComponentEditorRegistry::Get());

    const auto* cameraSection = FindSection(model, "Camera");
    ASSERT_NE(cameraSection, nullptr);
    const auto* skyboxMaterialField = FindField(*cameraSection, "Skybox Material");
    ASSERT_NE(skyboxMaterialField, nullptr);
    EXPECT_EQ(skyboxMaterialField->kind, Widgets::UIEditorPropertyGridFieldKind::Asset);
    EXPECT_EQ(
        skyboxMaterialField->assetValue.assetId,
        "Assets/Materials/Skybox.mat");
    EXPECT_EQ(
        skyboxMaterialField->assetValue.displayName,
        "Skybox.mat");
}

} // namespace
} // namespace XCEngine::UI::Editor::App