NodeEditorApplication.cpp

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// This file is part of INSTINCT, the INS Toolkit for Integrated
// Navigation Concepts and Training by the Institute of Navigation of
// the University of Stuttgart, Germany.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
#include "NodeEditorApplication.hpp"
 
#include <fmt/ranges.h>
 
#include <imgui_node_editor.h>
#include <imgui_node_editor_internal.h>
namespace ed = ax::NodeEditor;
 
#include <imgui_internal.h>
#include <imgui_stdlib.h>
 
#include "ImGuiFileDialog.h"
 
#include "implot.h"
#include <implot_internal.h>
 
#include "internal/gui/Shortcuts.hpp"
#include "internal/gui/TouchTracker.hpp"
#include "internal/gui/FlowAnimation.hpp"
 
#include "internal/gui/panels/BlueprintNodeBuilder.hpp"
namespace util = ax::NodeEditor::Utilities;
 
#include "internal/gui/panels/LeftPane.hpp"
 
#include "internal/gui/menus/MainMenuBar.hpp"
 
#include "internal/gui/widgets/Splitter.hpp"
#include "internal/gui/widgets/HelpMarker.hpp"
#include "internal/gui/widgets/Spinner.hpp"
#include "internal/gui/widgets/TextAnsiColored.hpp"
 
#include "internal/gui/windows/Global.hpp"
 
#include "internal/Node/Pin.hpp"
#include "internal/Node/Node.hpp"
 
#include "internal/NodeManager.hpp"
namespace nm = NAV::NodeManager;
#include "NodeRegistry.hpp"
 
#include "internal/ConfigManager.hpp"
#include "internal/FlowManager.hpp"
#include "internal/FlowExecutor.hpp"
 
#include "util/Json.hpp"
#include "util/StringUtil.hpp"
 
#include <string>
#include <array>
#include <vector>
#include <map>
#include <algorithm>
#include <utility>
#include <filesystem>
 
#include "internal/CMakeRC.hpp"
 
namespace NAV::gui
{
namespace
{
 
ax::NodeEditor::EditorContext* m_Editor = nullptr;
 
} // namespace
} // namespace NAV::gui
 
void NAV::gui::NodeEditorApplication::OnStart()
{
    LOG_TRACE("called");
 
    ed::Config config;
 
    // config.SettingsFile = "INSTINCT.json";
    // config.UserPointer = this;
 
    // Stops the Editor from creating a log file, as we do it ourselves
    // clang-format off
    config.SaveSettings = [](const char* /*data*/, size_t /*size*/,
                             ed::SaveReasonFlags /*reason*/, void* /*userPointer*/) -> bool {
        // clang-format on
 
        return false;
    };
 
    // Trigger the changed bar on the node overview list when a node is moved
    // clang-format off
    config.SaveNodeSettings = [](ed::NodeId nodeId, const char* /*data*/, size_t /*size*/,
                                 ed::SaveReasonFlags /*reason*/, void* /*userPointer*/) -> bool {
        // clang-format on
 
        // auto* self = static_cast<NodeEditorApplication*>(userPointer);
 
        flow::ApplyChanges();
        gui::TouchNode(nodeId);
 
        return true;
    };
 
    m_Editor = ed::CreateEditor(&config);
    LOG_DATA("Editor created");
    ed::SetCurrentEditor(m_Editor);
    LOG_DATA("Editor set as current");
 
    ImGui::GetStyle().FrameRounding = 4.0F;
    ed::GetStyle().FlowDuration = 1.0F;
 
    ImPlot::CreateContext();
    LOG_DATA("Context created");
    ImPlot::GetStyle().Use24HourClock = true;
 
    imPlotReferenceStyle = ImPlot::GetStyle();
 
    std::filesystem::path imPlotConfigFilepath = flow::GetConfigPath();
    LOG_DATA("Config path found: {}", imPlotConfigFilepath);
    if (std::filesystem::path inputPath{ ConfigManager::Get<std::string>("implot-config") };
        inputPath.is_relative())
    {
        imPlotConfigFilepath /= inputPath;
    }
    else
    {
        imPlotConfigFilepath = inputPath;
    }
    std::ifstream imPlotConfigFilestream(imPlotConfigFilepath);
 
    if (!imPlotConfigFilestream.good())
    {
        LOG_ERROR("The ImPlot style config file could not be loaded: {}", imPlotConfigFilepath);
    }
    else
    {
        json j;
        imPlotConfigFilestream >> j;
 
        if (j.contains("implot") && j.at("implot").contains("style"))
        {
            j.at("implot").at("style").get_to(ImPlot::GetStyle());
        }
    }
    LOG_DATA("Config read");
 
    // Add custom colormap and set as default. ConfigManager::LoadGlobalSettings then overrides this default selection if it is saved
    ImPlotContext& gp = *ImPlot::GetCurrentContext();
    ImVector<ImVec4> custom;
    for (int c = 0; c < gp.ColormapData.GetKeyCount(ImPlotColormap_Deep); ++c)
    {
        custom.push_back(ImGui::ColorConvertU32ToFloat4(gp.ColormapData.GetKeyColor(ImPlotColormap_Deep, c)));
    }
    custom.push_back(ImColor(37, 109, 227));
    custom.push_back(ImColor(239, 100, 21));
    custom.push_back(ImColor(21, 228, 69));
    custom.push_back(ImColor(239, 20, 28));
    custom.push_back(ImColor(100, 64, 217));
    custom.push_back(ImColor(164, 78, 2));
    custom.push_back(ImColor(232, 39, 176));
    custom.push_back(ImColor(255, 207, 31));
    custom.push_back(ImColor(54, 228, 174));
    ImPlot::AddColormap("DeepEx", custom.Data, custom.Size, true);
    ImPlot::BustItemCache();
    gp.Style.Colormap = gp.ColormapData.Count - 1;
    ImPlot::BustItemCache();
    LOG_DATA("Colormap created");
 
    ConfigManager::LoadGlobalSettings();
    LOG_DATA("Global settings loaded");
 
    auto fs = cmrc::instinct::get_filesystem();
 
    if (fs.is_file("resources/images/BlueprintBackground.png"))
    {
        auto fd = fs.open("resources/images/BlueprintBackground.png");
 
        LOG_DEBUG("Generating Texture for Blueprint Background ({} byte)", fd.size());
 
        auto is = cmrc::memstream(const_cast<char*>(fd.begin()), // NOLINT(cppcoreguidelines-pro-type-const-cast)
                                  const_cast<char*>(fd.end()));  // NOLINT(cppcoreguidelines-pro-type-const-cast)
 
        std::vector<char> buffer;
        buffer.resize(fd.size(), '\0');
 
        is.read(buffer.data(),
                static_cast<std::streamsize>(buffer.size()));
 
        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
        m_HeaderBackground = LoadTexture(reinterpret_cast<const void*>(const_cast<const char*>(buffer.data())),
                                         static_cast<int>(fd.size()));
    }
    else
    {
        m_HeaderBackground = LoadTexture("resources/images/BlueprintBackground.png");
    }
 
    if (fs.is_file("resources/images/INSTINCT_Logo_Text_white_small.png"))
    {
        auto fd = fs.open("resources/images/INSTINCT_Logo_Text_white_small.png");
 
        LOG_DEBUG("Generating Texture for INSTINCT Logo (white) ({} byte)", fd.size());
 
        auto is = cmrc::memstream(const_cast<char*>(fd.begin()), // NOLINT(cppcoreguidelines-pro-type-const-cast)
                                  const_cast<char*>(fd.end()));  // NOLINT(cppcoreguidelines-pro-type-const-cast)
 
        std::vector<char> buffer;
        buffer.resize(fd.size(), '\0');
 
        is.read(buffer.data(),
                static_cast<std::streamsize>(buffer.size()));
 
        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
        m_InstinctLogo.at(0) = LoadTexture(reinterpret_cast<const void*>(const_cast<const char*>(buffer.data())),
                                           static_cast<int>(fd.size()));
    }
    else
    {
        m_InstinctLogo.at(0) = LoadTexture("resources/images/INSTINCT_Logo_Text_white_small.png");
    }
 
    if (fs.is_file("resources/images/INSTINCT_Logo_Text_black_small.png"))
    {
        auto fd = fs.open("resources/images/INSTINCT_Logo_Text_black_small.png");
 
        LOG_DEBUG("Generating Texture for INSTINCT Logo (black) ({} byte)", fd.size());
 
        auto is = cmrc::memstream(const_cast<char*>(fd.begin()), // NOLINT(cppcoreguidelines-pro-type-const-cast)
                                  const_cast<char*>(fd.end()));  // NOLINT(cppcoreguidelines-pro-type-const-cast)
 
        std::vector<char> buffer;
        buffer.resize(fd.size(), '\0');
 
        is.read(buffer.data(),
                static_cast<std::streamsize>(buffer.size()));
 
        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
        m_InstinctLogo.at(1) = LoadTexture(reinterpret_cast<const void*>(const_cast<const char*>(buffer.data())),
                                           static_cast<int>(fd.size()));
    }
    else
    {
        m_InstinctLogo.at(1) = LoadTexture("resources/images/INSTINCT_Logo_Text_black_small.png");
    }
 
    if (fs.is_file("resources/images/INS_logo_rectangular_white_small.png"))
    {
        auto fd = fs.open("resources/images/INS_logo_rectangular_white_small.png");
 
        LOG_DEBUG("Generating Texture for INS Logo (white) ({} byte)", fd.size());
 
        auto is = cmrc::memstream(const_cast<char*>(fd.begin()), // NOLINT(cppcoreguidelines-pro-type-const-cast)
                                  const_cast<char*>(fd.end()));  // NOLINT(cppcoreguidelines-pro-type-const-cast)
 
        std::vector<char> buffer;
        buffer.resize(fd.size(), '\0');
 
        is.read(buffer.data(),
                static_cast<std::streamsize>(buffer.size()));
 
        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
        m_InsLogo.at(0) = LoadTexture(reinterpret_cast<const void*>(const_cast<const char*>(buffer.data())),
                                      static_cast<int>(fd.size()));
    }
    else
    {
        m_InsLogo.at(0) = LoadTexture("resources/images/INS_logo_rectangular_white_small.png");
    }
 
    if (fs.is_file("resources/images/INS_logo_rectangular_black_small.png"))
    {
        auto fd = fs.open("resources/images/INS_logo_rectangular_black_small.png");
 
        LOG_DEBUG("Generating Texture for INS Logo (black) ({} byte)", fd.size());
 
        auto is = cmrc::memstream(const_cast<char*>(fd.begin()), // NOLINT(cppcoreguidelines-pro-type-const-cast)
                                  const_cast<char*>(fd.end()));  // NOLINT(cppcoreguidelines-pro-type-const-cast)
 
        std::vector<char> buffer;
        buffer.resize(fd.size(), '\0');
 
        is.read(buffer.data(),
                static_cast<std::streamsize>(buffer.size()));
 
        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
        m_InsLogo.at(1) = LoadTexture(reinterpret_cast<const void*>(const_cast<const char*>(buffer.data())),
                                      static_cast<int>(fd.size()));
    }
    else
    {
        m_InsLogo.at(1) = LoadTexture("resources/images/INS_logo_rectangular_black_small.png");
    }
 
    if (fs.is_file("resources/images/ic_save_white_24dp.png"))
    {
        auto fd = fs.open("resources/images/ic_save_white_24dp.png");
 
        LOG_DEBUG("Generating Texture for Save icon ({} byte)", fd.size());
 
        auto is = cmrc::memstream(const_cast<char*>(fd.begin()), // NOLINT(cppcoreguidelines-pro-type-const-cast)
                                  const_cast<char*>(fd.end()));  // NOLINT(cppcoreguidelines-pro-type-const-cast)
 
        std::vector<char> buffer;
        buffer.resize(fd.size(), '\0');
 
        is.read(buffer.data(),
                static_cast<std::streamsize>(buffer.size()));
 
        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
        m_SaveButtonImage = LoadTexture(reinterpret_cast<const void*>(const_cast<const char*>(buffer.data())),
                                        static_cast<int>(fd.size()));
    }
    else
    {
        m_SaveButtonImage = LoadTexture("resources/images/ic_save_white_24dp.png");
    }
 
    if (fs.is_file("resources/images/Rose-rhodonea-curve-7x9-chart-improved.jpg"))
    {
        auto fd = fs.open("resources/images/Rose-rhodonea-curve-7x9-chart-improved.jpg");
 
        LOG_DEBUG("Generating Texture for Rose figure ({} byte)", fd.size());
 
        auto is = cmrc::memstream(const_cast<char*>(fd.begin()), // NOLINT(cppcoreguidelines-pro-type-const-cast)
                                  const_cast<char*>(fd.end()));  // NOLINT(cppcoreguidelines-pro-type-const-cast)
 
        std::vector<char> buffer;
        buffer.resize(fd.size(), '\0');
 
        is.read(buffer.data(),
                static_cast<std::streamsize>(buffer.size()));
 
        // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
        m_RoseFigure = LoadTexture(reinterpret_cast<const void*>(const_cast<const char*>(buffer.data())),
                                   static_cast<int>(fd.size()));
    }
    else
    {
        m_RoseFigure = LoadTexture("resources/images/Rose-rhodonea-curve-7x9-chart-improved.jpg");
    }
    LOG_DATA("Finished NodeEditorApplication OnStart()");
}
 
void NAV::gui::NodeEditorApplication::OnStop()
{
    LOG_TRACE("called");
 
    FlowExecutor::stop();
 
    ConfigManager::SaveGlobalSettings();
 
    nm::DeleteAllNodes();
 
    auto releaseTexture = [this](ImTextureID& id) {
        if (id)
        {
            DestroyTexture(id);
            id = nullptr;
        }
    };
 
    releaseTexture(m_InsLogo.at(0));
    releaseTexture(m_InsLogo.at(1));
    releaseTexture(m_InstinctLogo.at(0));
    releaseTexture(m_InstinctLogo.at(1));
    releaseTexture(m_HeaderBackground);
    releaseTexture(m_SaveButtonImage);
    releaseTexture(m_RoseFigure);
 
    if (m_Editor)
    {
        ed::DestroyEditor(m_Editor);
        m_Editor = nullptr;
    }
    if (ImPlotContext* ctx = ImPlot::GetCurrentContext())
    {
        ImPlot::DestroyContext(ctx);
    }
}
 
bool NAV::gui::NodeEditorApplication::OnQuitRequest()
{
    LOG_TRACE("called");
 
    if (flow::HasUnsavedChanges())
    {
        globalAction = GlobalActions::QuitUnsaved;
        return false;
    }
 
    return true;
}
 
void NAV::gui::NodeEditorApplication::ShowQuitRequested()
{
    const auto& io = ImGui::GetIO();
    if (!io.KeyCtrl && !io.KeyAlt && !io.KeyShift && !io.KeySuper)
    {
        if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Escape)))
        {
            globalAction = GlobalActions::None;
            return;
        }
    }
 
    ImGui::PushFont(WindowFont());
    ImGui::OpenPopup("Quit with unsaved changes?");
    if (ImGui::BeginPopupModal("Quit with unsaved changes?", nullptr, ImGuiWindowFlags_AlwaysAutoResize))
    {
        ImGui::Text("Do you want to save your changes or discard them?");
        if (ImGui::Button("Save"))
        {
            if (flow::GetCurrentFilename().empty())
            {
                ImGuiFileDialog::Instance()->OpenModal("Save Flow", "Save Flow", ".flow", (flow::GetFlowPath() / ".").string(), 1, nullptr, ImGuiFileDialogFlags_ConfirmOverwrite);
                ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".flow", ImVec4(0.0F, 1.0F, 0.0F, 0.9F));
            }
            else
            {
                flow::SaveFlowAs(flow::GetCurrentFilename());
                globalAction = GlobalActions::None;
                flow::DiscardChanges();
                Quit();
                ImGui::CloseCurrentPopup();
            }
        }
 
        if (ImGuiFileDialog::Instance()->Display("Save Flow", ImGuiWindowFlags_NoCollapse, ImVec2(600, 400)))
        {
            if (ImGuiFileDialog::Instance()->IsOk())
            {
                flow::SetCurrentFilename(ImGuiFileDialog::Instance()->GetFilePathName());
                flow::SaveFlowAs(flow::GetCurrentFilename());
            }
 
            globalAction = GlobalActions::None;
            ImGuiFileDialog::Instance()->Close();
            Quit();
            ImGui::CloseCurrentPopup();
        }
        ImGui::SameLine();
        if (ImGui::Button("Discard"))
        {
            globalAction = GlobalActions::None;
            flow::DiscardChanges();
            Quit();
            ImGui::CloseCurrentPopup();
        }
        ImGui::SameLine();
        if (ImGui::Button("Cancel"))
        {
            globalAction = GlobalActions::None;
            ImGui::CloseCurrentPopup();
        }
        ImGui::EndPopup();
    }
    ImGui::PopFont();
}
 
void NAV::gui::NodeEditorApplication::ShowSaveAsRequested()
{
    ImGui::PushFont(WindowFont());
    ImGuiFileDialog::Instance()->OpenDialog("Save Flow", "Save Flow", ".flow", (flow::GetFlowPath() / ".").string(), 1, nullptr, ImGuiFileDialogFlags_ConfirmOverwrite);
    ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".flow", ImVec4(0.0F, 1.0F, 0.0F, 0.9F));
 
    const auto& io = ImGui::GetIO();
    if (!io.KeyCtrl && !io.KeyAlt && !io.KeyShift && !io.KeySuper)
    {
        if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Escape)))
        {
            globalAction = GlobalActions::None;
            ImGuiFileDialog::Instance()->Close();
            ImGui::PopFont();
            return;
        }
    }
 
    if (ImGuiFileDialog::Instance()->Display("Save Flow", ImGuiWindowFlags_NoCollapse, ImVec2(600, 400)))
    {
        if (ImGuiFileDialog::Instance()->IsOk())
        {
            flow::SetCurrentFilename(ImGuiFileDialog::Instance()->GetFilePathName());
            flow::SaveFlowAs(flow::GetCurrentFilename());
        }
 
        globalAction = GlobalActions::None;
        ImGuiFileDialog::Instance()->Close();
    }
    ImGui::PopFont();
}
 
void NAV::gui::NodeEditorApplication::ShowClearNodesRequested()
{
    const auto& io = ImGui::GetIO();
    if (!io.KeyCtrl && !io.KeyAlt && !io.KeyShift && !io.KeySuper)
    {
        if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Escape)))
        {
            globalAction = GlobalActions::None;
            return;
        }
    }
 
    ImGui::PushFont(WindowFont());
    ImGui::OpenPopup("Clear Nodes and discard unsaved changes?");
    if (ImGui::BeginPopupModal("Clear Nodes and discard unsaved changes?", nullptr, ImGuiWindowFlags_AlwaysAutoResize))
    {
        ImGui::Text("Do you want to save your changes before clearing the nodes?");
        if (ImGui::Button("Save"))
        {
            if (flow::GetCurrentFilename().empty())
            {
                ImGuiFileDialog::Instance()->OpenModal("Save Flow", "Save Flow", ".flow", (flow::GetFlowPath() / ".").string(), 1, nullptr, ImGuiFileDialogFlags_ConfirmOverwrite);
                ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".flow", ImVec4(0.0F, 1.0F, 0.0F, 0.9F));
            }
            else
            {
                flow::SaveFlowAs(flow::GetCurrentFilename());
                globalAction = GlobalActions::None;
                nm::DeleteAllNodes();
                flow::DiscardChanges();
                flow::SetCurrentFilename("");
                ImGui::CloseCurrentPopup();
            }
        }
 
        if (ImGuiFileDialog::Instance()->Display("Save Flow", ImGuiWindowFlags_NoCollapse, ImVec2(600, 400)))
        {
            if (ImGuiFileDialog::Instance()->IsOk())
            {
                flow::SetCurrentFilename(ImGuiFileDialog::Instance()->GetFilePathName());
                flow::SaveFlowAs(flow::GetCurrentFilename());
 
                ImGuiFileDialog::Instance()->Close();
                nm::DeleteAllNodes();
                flow::DiscardChanges();
                flow::SetCurrentFilename("");
            }
 
            globalAction = GlobalActions::None;
 
            ImGui::CloseCurrentPopup();
        }
        ImGui::SameLine();
        if (ImGui::Button("Discard"))
        {
            globalAction = GlobalActions::None;
            nm::DeleteAllNodes();
            flow::DiscardChanges();
            flow::SetCurrentFilename("");
            ImGui::CloseCurrentPopup();
        }
        ImGui::SameLine();
        if (ImGui::Button("Cancel"))
        {
            globalAction = GlobalActions::None;
            ImGui::CloseCurrentPopup();
        }
        ImGui::EndPopup();
    }
    ImGui::PopFont();
}
 
void NAV::gui::NodeEditorApplication::ShowLoadRequested()
{
    ImGui::PushFont(WindowFont());
    if (flow::HasUnsavedChanges())
    {
        ImGui::OpenPopup("Discard unsaved changes?");
        if (ImGui::BeginPopupModal("Discard unsaved changes?", nullptr, ImGuiWindowFlags_AlwaysAutoResize))
        {
            ImGui::Text("Do you want to save your changes or discard them before loading?");
            if (ImGui::Button("Save"))
            {
                if (flow::GetCurrentFilename().empty())
                {
                    ImGuiFileDialog::Instance()->OpenModal("Save Flow##Load", "Save Flow", ".flow", (flow::GetFlowPath() / ".").string(), 1, nullptr, ImGuiFileDialogFlags_ConfirmOverwrite);
                    ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".flow", ImVec4(0.0F, 1.0F, 0.0F, 0.9F));
                }
                else
                {
                    flow::SaveFlowAs(flow::GetCurrentFilename());
                    flow::DiscardChanges();
                    ImGui::CloseCurrentPopup();
                }
            }
 
            if (ImGuiFileDialog::Instance()->Display("Save Flow##Load", ImGuiWindowFlags_NoCollapse, ImVec2(600, 400)))
            {
                if (ImGuiFileDialog::Instance()->IsOk())
                {
                    flow::SetCurrentFilename(ImGuiFileDialog::Instance()->GetFilePathName());
                    flow::SaveFlowAs(flow::GetCurrentFilename());
                }
 
                flow::DiscardChanges();
                ImGuiFileDialog::Instance()->Close();
                ImGui::CloseCurrentPopup();
            }
            ImGui::SameLine();
            if (ImGui::Button("Discard"))
            {
                flow::DiscardChanges();
                ImGui::CloseCurrentPopup();
            }
            ImGui::SameLine();
            if (ImGui::Button("Cancel"))
            {
                globalAction = GlobalActions::None;
                ImGui::CloseCurrentPopup();
            }
            ImGui::EndPopup();
        }
    }
    else
    {
        ImGuiFileDialog::Instance()->OpenDialog("Load Flow", "Load Flow", ".flow", (flow::GetFlowPath() / ".").string(), 1, nullptr);
        ImGuiFileDialog::Instance()->SetFileStyle(IGFD_FileStyleByExtention, ".flow", ImVec4(0.0F, 1.0F, 0.0F, 0.9F));
 
        static bool loadSuccessful = true;
 
        auto& io = ImGui::GetIO();
        if (!io.KeyCtrl && !io.KeyAlt && !io.KeyShift && !io.KeySuper)
        {
            if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Escape)))
            {
                globalAction = GlobalActions::None;
                loadSuccessful = true;
                ImGuiFileDialog::Instance()->Close();
                ImGui::PopFont();
                return;
            }
        }
 
        if (ImGuiFileDialog::Instance()->Display("Load Flow", ImGuiWindowFlags_NoCollapse, ImVec2(600, 400)))
        {
            if (ImGuiFileDialog::Instance()->IsOk())
            {
                loadSuccessful = flow::LoadFlow(ImGuiFileDialog::Instance()->GetFilePathName());
                if (loadSuccessful)
                {
                    globalAction = GlobalActions::None;
                    frameCountNavigate = ImGui::GetFrameCount();
                    ImGuiFileDialog::Instance()->Close();
                }
            }
            else
            {
                globalAction = GlobalActions::None;
                ImGuiFileDialog::Instance()->Close();
            }
        }
        if (!loadSuccessful)
        {
            ImGui::OpenPopup("Could not open file");
        }
 
        if (ImGui::BeginPopupModal("Could not open file", nullptr, ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoResize))
        {
            ImGui::Text("Could not open the flow file. This can have the following reasons:");
            ImGui::Text("- the filename specified is invalid");
            ImGui::Text("- the program has insufficient permissions to access the file");
            ImGui::Text("- the provided file was not a valid flow file");
            ImGui::Text("Read the log output for further information");
            if (ImGui::Button("Close"))
            {
                loadSuccessful = true;
                ImGui::CloseCurrentPopup();
            }
            ImGui::EndPopup();
        }
    }
    ImGui::PopFont();
}
 
void NAV::gui::NodeEditorApplication::ShowRenameNodeRequest(Node*& renameNode)
{
    ImGui::PushFont(WindowFont());
    const char* title = renameNode->kind == Node::Kind::GroupBox ? "Rename Group Box" : "Rename Node";
    ImGui::OpenPopup(title);
    if (ImGui::BeginPopupModal(title, nullptr, ImGuiWindowFlags_AlwaysAutoResize))
    {
        static std::string nameBackup = renameNode->name;
        if (nameBackup.empty())
        {
            nameBackup = renameNode->name;
        }
 
        auto& io = ImGui::GetIO();
        if (!io.KeyCtrl && !io.KeyAlt && !io.KeyShift && !io.KeySuper)
        {
            if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Escape)))
            {
                if (renameNode)
                {
                    renameNode->name = nameBackup;
                }
                nameBackup.clear();
                renameNode = nullptr;
                ImGui::CloseCurrentPopup();
                ImGui::EndPopup();
                ImGui::PopFont();
                return;
            }
        }
 
        if (ImGui::InputTextMultiline(fmt::format("##{}", size_t(renameNode->id)).c_str(), &renameNode->name, ImVec2(0, 65), ImGuiInputTextFlags_CtrlEnterForNewLine | ImGuiInputTextFlags_EnterReturnsTrue))
        {
            nameBackup.clear();
            renameNode = nullptr;
            ImGui::CloseCurrentPopup();
        }
        ImGui::SameLine();
        gui::widgets::HelpMarker("Hold SHIFT or use mouse to select text.\n"
                                 "CTRL+Left/Right to word jump.\n"
                                 "CTRL+A or double-click to select all.\n"
                                 "CTRL+X,CTRL+C,CTRL+V clipboard.\n"
                                 "CTRL+Z,CTRL+Y undo/redo.\n"
                                 "ESCAPE to revert.");
        if (ImGui::Button("Accept"))
        {
            nameBackup.clear();
            renameNode = nullptr;
            flow::ApplyChanges();
            ImGui::CloseCurrentPopup();
        }
        ImGui::SameLine();
        if (ImGui::Button("Cancel"))
        {
            if (renameNode)
            {
                renameNode->name = nameBackup;
            }
            nameBackup.clear();
            renameNode = nullptr;
            ImGui::CloseCurrentPopup();
        }
        ImGui::EndPopup();
    }
    ImGui::PopFont();
}
 
void NAV::gui::NodeEditorApplication::ShowRenamePinRequest(Pin*& renamePin)
{
    ImGui::PushFont(WindowFont());
    const char* title = "Rename Pin";
    ImGui::OpenPopup(title);
    if (ImGui::BeginPopupModal(title, nullptr, ImGuiWindowFlags_AlwaysAutoResize))
    {
        static std::string nameBackup = renamePin->name;
        if (nameBackup.empty())
        {
            nameBackup = renamePin->name;
        }
 
        auto& io = ImGui::GetIO();
        if (!io.KeyCtrl && !io.KeyAlt && !io.KeyShift && !io.KeySuper)
        {
            if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Escape)))
            {
                if (renamePin)
                {
                    renamePin->name = nameBackup;
                }
                nameBackup.clear();
                renamePin = nullptr;
                ImGui::CloseCurrentPopup();
                ImGui::EndPopup();
                ImGui::PopFont();
                return;
            }
        }
 
        if (ImGui::InputTextMultiline(fmt::format("##{}", size_t(renamePin->id)).c_str(), &renamePin->name, ImVec2(0, 65), ImGuiInputTextFlags_CtrlEnterForNewLine | ImGuiInputTextFlags_EnterReturnsTrue))
        {
            nameBackup.clear();
            renamePin = nullptr;
            ImGui::CloseCurrentPopup();
        }
        ImGui::SameLine();
        gui::widgets::HelpMarker("Hold SHIFT or use mouse to select text.\n"
                                 "CTRL+Left/Right to word jump.\n"
                                 "CTRL+A or double-click to select all.\n"
                                 "CTRL+X,CTRL+C,CTRL+V clipboard.\n"
                                 "CTRL+Z,CTRL+Y undo/redo.\n"
                                 "ESCAPE to revert.");
        if (ImGui::Button("Accept"))
        {
            nameBackup.clear();
            renamePin = nullptr;
            flow::ApplyChanges();
            ImGui::CloseCurrentPopup();
        }
        ImGui::SameLine();
        if (ImGui::Button("Cancel"))
        {
            if (renamePin)
            {
                renamePin->name = nameBackup;
            }
            nameBackup.clear();
            renamePin = nullptr;
            ImGui::CloseCurrentPopup();
        }
        ImGui::EndPopup();
    }
    ImGui::PopFont();
}
 
void NAV::gui::NodeEditorApplication::OnFrame(float deltaTime)
{
    bool firstFrame = ImGui::GetFrameCount() == 1;
 
    if (frameCountNavigate && ImGui::GetFrameCount() - frameCountNavigate > 3)
    {
        frameCountNavigate = 0;
        ed::NavigateToContent();
    }
 
    switch (globalAction)
    {
    case GlobalActions::Quit:
        Quit();
        break;
    case GlobalActions::QuitUnsaved:
        ShowQuitRequested();
        break;
    case GlobalActions::SaveAs:
        ShowSaveAsRequested();
        break;
    case GlobalActions::Clear:
        ShowClearNodesRequested();
        break;
    case GlobalActions::Load:
        ShowLoadRequested();
        break;
    default:
        break;
    }
 
    gui::UpdateTouch(deltaTime);
 
    if (ed::AreShortcutsEnabled())
    {
        gui::checkShortcuts(globalAction);
    }
 
    ImGui::PushFont(PanelFont());
    gui::menus::ShowMainMenuBar(globalAction);
    menuBarHeight = ImGui::GetCursorPosY();
    ImGui::PopFont();
 
    ed::SetCurrentEditor(m_Editor);
 
    static ed::NodeId contextNodeId = 0;
    static ed::LinkId contextLinkId = 0;
    static ed::PinId contextPinId = 0;
    static bool createNewNode = false;
    static Pin* newNodeLinkPin = nullptr;
 
    bool leftPaneActive = false;
    if (!hideLeftPane)
    {
        gui::widgets::Splitter("Main Splitter", true, SPLITTER_THICKNESS, &leftPaneWidth, &rightPaneWidth, 25.0F, 50.0F);
 
        ImGui::PushFont(PanelFont());
        leftPaneActive = gui::panels::ShowLeftPane(leftPaneWidth - SPLITTER_THICKNESS);
        ImGui::PopFont();
 
        ImGui::SameLine(0.0F, 12.0F);
    }
 
    // ToolTips have to be shown outside of the NodeEditor Context, so save the Tooltip and push it afterwards
    std::string tooltipText;
 
    ImGui::BeginGroup();
 
    bool darkMode = ax::NodeEditor::GetStyle().Colors[ax::NodeEditor::StyleColor_Bg].x
                        + ax::NodeEditor::GetStyle().Colors[ax::NodeEditor::StyleColor_Bg].y
                        + ax::NodeEditor::GetStyle().Colors[ax::NodeEditor::StyleColor_Bg].z
                    > 2.0F;
 
    if (bottomViewSelectedTab != BottomViewTabItem::None)
    {
        float blueprintHeight = ImGui::GetContentRegionAvail().y - bottomViewHeight + (isUsingBigPanelFont() ? 48.5F : 28.5F);
        ImGui::PushStyleColor(ImGuiCol_Separator, IM_COL32_BLACK_TRANS);
        gui::widgets::Splitter("Log Splitter", false, 6.0F, &blueprintHeight, &bottomViewHeight, 400.0F, BOTTOM_VIEW_UNCOLLAPSED_MIN_HEIGHT);
        ImGui::PopStyleColor();
    }
 
    ed::Begin("Node editor", ImVec2(0, ImGui::GetContentRegionAvail().y - bottomViewHeight + SPLITTER_THICKNESS));
    {
        static Pin* newLinkPin = nullptr;
 
        auto cursorTopLeft = ImGui::GetCursorScreenPos();
 
        static util::BlueprintNodeBuilder builder(m_HeaderBackground, GetTextureWidth(m_HeaderBackground), GetTextureHeight(m_HeaderBackground));
 
        auto textColor = ax::NodeEditor::GetStyle().Colors[ax::NodeEditor::StyleColor_NodeBg].x
                                     + ax::NodeEditor::GetStyle().Colors[ax::NodeEditor::StyleColor_NodeBg].y
                                     + ax::NodeEditor::GetStyle().Colors[ax::NodeEditor::StyleColor_NodeBg].z
                                 > 2.0F
                             ? IM_COL32(0, 0, 0, 255)
                             : IM_COL32(255, 255, 255, 255);
 
        for (auto* node : nm::m_Nodes()) // Blueprint || Simple
        {
            if (node->kind != Node::Kind::Blueprint && node->kind != Node::Kind::Simple) // NOLINT(misc-redundant-expression) - false positive warning
            {
                continue;
            }
 
            const auto isSimple = node->kind == Node::Kind::Simple;
 
            bool hasOutputDelegates = false;
            for (const auto& output : node->outputPins)
            {
                if (output.type == Pin::Type::Delegate)
                {
                    hasOutputDelegates = true;
                }
            }
 
            builder.Begin(node->id);
 
            if (!isSimple) // Header Text for Blueprint Nodes
            {
                if (node->isDisabled()) // Node disabled
                {
                    builder.Header(ImColor(192, 192, 192)); // Silver
                }
                else if (node->isInitialized())
                {
                    builder.Header(ImColor(128, 255, 128)); // Light green
                }
                else
                {
                    builder.Header(ImColor(255, 128, 128)); // Light red
                }
                ImGui::Spring(0);
                ImGui::PushStyleColor(ImGuiCol_Text, textColor);
                ImGui::TextUnformatted(node->name.c_str());
                ImGui::PopStyleColor();
                ImGui::Spring(1);
                if (node->getState() == Node::State::DoInitialize)
                {
                    gui::widgets::Spinner(("##Spinner " + node->nameId()).c_str(), ImColor(144, 202, 238), 10.0F, 1.0F);
                }
                else if (node->getState() == Node::State::Initializing)
                {
                    gui::widgets::Spinner(("##Spinner " + node->nameId()).c_str(), ImColor(144, 238, 144), 10.0F, 1.0F);
                }
                else if (node->getState() == Node::State::DoDeinitialize)
                {
                    gui::widgets::Spinner(("##Spinner " + node->nameId()).c_str(), ImColor(255, 222, 122), 10.0F, 1.0F);
                }
                else if (node->getState() == Node::State::Deinitializing)
                {
                    gui::widgets::Spinner(("##Spinner " + node->nameId()).c_str(), ImColor(255, 160, 122), 10.0F, 1.0F);
                }
                else
                {
                    ImGui::Dummy(ImVec2(ImGui::GetStyle().ItemSpacing.x + 12.0F + ImGui::GetStyle().FramePadding.x, 26));
                }
                if (hasOutputDelegates)
                {
                    ImGui::BeginVertical("delegates", ImVec2(0, 26));
                    ImGui::Spring(1, 0);
                    for (const auto& output : node->outputPins)
                    {
                        if (output.type != Pin::Type::Delegate)
                        {
                            continue;
                        }
 
                        auto alpha = ImGui::GetStyle().Alpha;
                        if (newLinkPin && newLinkPin->kind == Pin::Kind::Input && &output != newLinkPin
                            && !reinterpret_cast<InputPin*>(newLinkPin)->canCreateLink(output))
                        {
                            alpha = alpha * (48.0F / 255.0F);
                        }
 
                        ed::BeginPin(output.id, ed::PinKind::Output);
                        ed::PinPivotAlignment(ImVec2(1.0F, 0.5F));
                        ed::PinPivotSize(ImVec2(0, 0));
                        ImGui::BeginHorizontal(output.id.AsPointer());
                        ImGui::PushStyleVar(ImGuiStyleVar_Alpha, alpha);
                        // if (!output.name.empty())
                        // {
                        //     ImGui::PushStyleColor(ImGuiCol_Text, textColor);
                        //     ImGui::TextUnformatted(output.name.c_str());
                        //     ImGui::PopStyleColor();
                        //     ImGui::Spring(0);
                        // }
                        output.drawPinIcon(output.isPinLinked(), static_cast<int>(alpha * 255));
                        ImGui::Spring(0, ImGui::GetStyle().ItemSpacing.x / 2);
                        ImGui::EndHorizontal();
                        ImGui::PopStyleVar();
                        ed::EndPin();
 
                        // DrawItemRect(ImColor(255, 0, 0));
                    }
                    ImGui::Spring(1, 0);
                    ImGui::EndVertical();
                    ImGui::Spring(0, ImGui::GetStyle().ItemSpacing.x / 2);
                }
                else
                {
                    ImGui::Spring(0);
                }
                builder.EndHeader();
            }
 
            for (auto& input : node->inputPins) // Input Pins
            {
                auto alpha = ImGui::GetStyle().Alpha;
                if (newLinkPin && newLinkPin->kind == Pin::Kind::Output && &input != newLinkPin
                    && !reinterpret_cast<OutputPin*>(newLinkPin)->canCreateLink(input))
                {
                    alpha = alpha * (48.0F / 255.0F);
                }
 
                builder.Input(input.id);
                ImGui::PushStyleVar(ImGuiStyleVar_Alpha, alpha);
                input.drawPinIcon(input.isPinLinked(), static_cast<int>(alpha * 255));
                if (ImGui::IsItemHovered()) { tooltipText = fmt::format("{}", fmt::join(input.dataIdentifier, "\n")); }
                if (_showQueueSizeOnPins && input.type == Pin::Type::Flow && input.isPinLinked())
                {
                    auto cursor = ImGui::GetCursorPos();
                    std::string text = fmt::format("{}{}", input.queue.size(), input.queueBlocked ? "*" : "");
                    auto* drawList = ImGui::GetWindowDrawList();
                    drawList->AddText(ImVec2(cursor.x - 26.0F, cursor.y + 2.F), IM_COL32(255, 0, 0, 255), text.c_str());
                }
 
                ImGui::Spring(0);
                if (!input.name.empty())
                {
                    bool noneType = input.type == Pin::Type::None;
                    if (noneType)
                    {
                        ImGui::BeginDisabled();
                    }
                    ImGui::PushStyleColor(ImGuiCol_Text, textColor);
                    ImGui::TextUnformatted(input.name.c_str());
                    ImGui::PopStyleColor();
                    if (noneType)
                    {
                        ImGui::EndDisabled();
                    }
                    ImGui::Spring(0);
                }
                ImGui::PopStyleVar();
                util::BlueprintNodeBuilder::EndInput();
            }
 
            if (isSimple) // Middle Text for Simple Nodes
            {
                builder.Middle();
 
                ImGui::Spring(1, 0);
                ImGui::PushStyleColor(ImGuiCol_Text, textColor);
                ImGui::TextUnformatted(node->name.c_str());
                ImGui::PopStyleColor();
                ImGui::Spring(1, 0);
            }
 
            for (const auto& output : node->outputPins) // Output Pins
            {
                if (!isSimple && output.type == Pin::Type::Delegate)
                {
                    continue;
                }
 
                auto alpha = ImGui::GetStyle().Alpha;
                if (newLinkPin && newLinkPin->kind == Pin::Kind::Input && &output != newLinkPin
                    && !reinterpret_cast<InputPin*>(newLinkPin)->canCreateLink(output))
                {
                    alpha = alpha * (48.0F / 255.0F);
                }
 
                ImGui::PushStyleVar(ImGuiStyleVar_Alpha, alpha);
                builder.Output(output.id);
                if (!output.name.empty())
                {
                    ImGui::Spring(0);
                    bool noneType = output.type == Pin::Type::None;
                    if (noneType)
                    {
                        ImGui::BeginDisabled();
                    }
                    ImGui::PushStyleColor(ImGuiCol_Text, textColor);
                    ImGui::TextUnformatted(output.name.c_str());
                    ImGui::PopStyleColor();
                    if (noneType)
                    {
                        ImGui::EndDisabled();
                    }
                }
                ImGui::Spring(0);
                output.drawPinIcon(output.isPinLinked(), static_cast<int>(alpha * 255));
                if (ImGui::IsItemHovered()) { tooltipText = fmt::format("{}", fmt::join(output.dataIdentifier, "\n")); }
                if (_showQueueSizeOnPins && output.type == Pin::Type::Flow && output.isPinLinked())
                {
                    auto cursor = ImGui::GetCursorPos();
                    std::string text = fmt::format("{}", output.noMoreDataAvailable ? "F" : "P");
                    auto* drawList = ImGui::GetWindowDrawList();
                    drawList->AddText(ImVec2(cursor.x - 26.0F, cursor.y + 2.F), IM_COL32(255, 0, 0, 255), text.c_str());
                }
 
                ImGui::PopStyleVar();
                util::BlueprintNodeBuilder::EndOutput();
            }
 
            builder.End();
        }
 
        for (const auto* node : nm::m_Nodes()) // GroupBox
        {
            if (node->kind != Node::Kind::GroupBox)
            {
                continue;
            }
 
            ImGui::PushStyleVar(ImGuiStyleVar_Alpha, 0.75F);
            ed::PushStyleColor(ed::StyleColor_NodeBg, m_colors[COLOR_GROUP_HEADER_BG]);
            ed::PushStyleColor(ed::StyleColor_NodeBorder, m_colors[COLOR_GROUP_OUTER_BORDER]);
            ed::BeginNode(node->id);
            ImGui::PushID(node->id.AsPointer());
            ImGui::BeginVertical("content");
            ImGui::BeginHorizontal("horizontal");
            ImGui::Spring(1);
            ImGui::PushStyleColor(ImGuiCol_Text, m_colors[COLOR_GROUP_HEADER_TEXT]);
            ImGui::TextUnformatted(node->name.c_str());
            ImGui::PopStyleColor();
            ImGui::Spring(1);
            ImGui::EndHorizontal();
            ed::Group(node->_size);
            ImGui::EndVertical();
            ImGui::PopID();
            ed::EndNode();
            ed::PopStyleColor(2);
            ImGui::PopStyleVar();
        }
 
        for (const auto* node : nm::m_Nodes())
        {
            for (const auto& output : node->outputPins) // Output Pins
            {
                auto color = output.getIconColor();
                if (output.type == Pin::Type::Flow)
                {
                    color = darkMode ? ImColor{ 0, 0, 0 } : ImColor{ 255, 255, 255 };
                }
 
                for (const auto& link : output.links)
                {
                    ed::Link(link.linkId, output.id, link.connectedPinId, color, 2.0F * defaultFontRatio());
                }
            }
        }
 
        if (!createNewNode)
        {
            if (ed::BeginCreate(ImColor(255, 255, 255), 2.0F))
            {
                auto showLabel = [](const char* label, ImColor color) {
                    ImGui::SetCursorPosY(ImGui::GetCursorPosY() - ImGui::GetTextLineHeight());
                    auto size = ImGui::CalcTextSize(label);
 
                    auto padding = ImGui::GetStyle().FramePadding;
                    auto spacing = ImGui::GetStyle().ItemSpacing;
 
                    ImGui::SetCursorPos(ImGui::GetCursorPos() + ImVec2(spacing.x, -spacing.y));
 
                    auto rectMin = ImGui::GetCursorScreenPos() - padding;
                    auto rectMax = ImGui::GetCursorScreenPos() + size + padding;
 
                    auto* drawList = ImGui::GetWindowDrawList();
                    drawList->AddRectFilled(rectMin, rectMax, color, size.y * 0.15F);
                    ImGui::TextUnformatted(label);
                };
 
                ed::PinId startPinId = 0;
                ed::PinId endPinId = 0;
                if (ed::QueryNewLink(&startPinId, &endPinId))
                {
                    Pin* startPin = nm::FindInputPin(startPinId);
                    Pin* endPin = nm::FindInputPin(endPinId);
                    if (!startPin) { startPin = nm::FindOutputPin(startPinId); }
                    if (!endPin) { endPin = nm::FindOutputPin(endPinId); }
 
                    newLinkPin = startPin ? startPin : endPin;
 
                    if (startPin && startPin->kind == Pin::Kind::Input)
                    {
                        std::swap(startPin, endPin);
                        std::swap(startPinId, endPinId);
                    }
 
                    if (startPin && endPin)
                    {
                        if (endPin == startPin)
                        {
                            ed::RejectNewItem(ImColor(255, 0, 0), 2.0F);
                        }
                        else if (endPin->kind == startPin->kind)
                        {
                            showLabel("x Incompatible Pin Kind", ImColor(45, 32, 32, 180));
                            ed::RejectNewItem(ImColor(255, 0, 0), 2.0F);
                        }
                        else if (endPin->parentNode == startPin->parentNode)
                        {
                            showLabel("x Cannot connect to self", ImColor(45, 32, 32, 180));
                            ed::RejectNewItem(ImColor(255, 0, 0), 1.0F);
                        }
                        else if (endPin->type != startPin->type)
                        {
                            showLabel("x Incompatible Pin Type", ImColor(45, 32, 32, 180));
                            ed::RejectNewItem(ImColor(255, 128, 128), 1.0F);
                        }
                        else if (reinterpret_cast<InputPin*>(endPin)->isPinLinked())
                        {
                            showLabel("End Pin already linked", ImColor(45, 32, 32, 180));
                            ed::RejectNewItem(ImColor(255, 128, 128), 1.0F);
                        }
                        else if (startPin->type == Pin::Type::Flow
                                 && !NAV::NodeRegistry::NodeDataTypeAnyIsChildOf(startPin->dataIdentifier, endPin->dataIdentifier))
                        {
                            showLabel(fmt::format("The data type [{}]\ncan't be linked to [{}]",
                                                  fmt::join(startPin->dataIdentifier, ","),
                                                  fmt::join(endPin->dataIdentifier, ","))
                                          .c_str(),
                                      ImColor(45, 32, 32, 180));
                            ed::RejectNewItem(ImColor(255, 128, 128), 1.0F);
                        }
                        else if (startPin->type == Pin::Type::Delegate
                                 && (startPin->parentNode == nullptr
                                     || std::ranges::find(endPin->dataIdentifier, startPin->parentNode->type()) == endPin->dataIdentifier.end()))
                        {
                            if (startPin->parentNode != nullptr)
                            {
                                showLabel(fmt::format("The delegate type [{}]\ncan't be linked to [{}]",
                                                      startPin->parentNode->type(),
                                                      fmt::join(endPin->dataIdentifier, ","))
                                              .c_str(),
                                          ImColor(45, 32, 32, 180));
                            }
 
                            ed::RejectNewItem(ImColor(255, 128, 128), 1.0F);
                        }
                        else if ((startPin->type == Pin::Type::Object || startPin->type == Pin::Type::Matrix) // NOLINT(misc-redundant-expression) - false positive warning
                                 && !Pin::dataIdentifierHaveCommon(startPin->dataIdentifier, endPin->dataIdentifier))
                        {
                            showLabel(fmt::format("The data type [{}]\ncan't be linked to [{}]",
                                                  fmt::join(startPin->dataIdentifier, ","),
                                                  fmt::join(endPin->dataIdentifier, ","))
                                          .c_str(),
                                      ImColor(45, 32, 32, 180));
                            ed::RejectNewItem(ImColor(255, 128, 128), 1.0F);
                        }
                        else
                        {
                            showLabel("+ Create Link", ImColor(32, 45, 32, 180));
                            if (ed::AcceptNewItem(ImColor(128, 255, 128), 4.0F))
                            {
                                reinterpret_cast<OutputPin*>(startPin)->createLink(*reinterpret_cast<InputPin*>(endPin));
                            }
                        }
                    }
                }
 
                ed::PinId pinId = 0;
                if (ed::QueryNewNode(&pinId))
                {
                    newLinkPin = nm::FindInputPin(pinId);
                    if (!newLinkPin) { newLinkPin = nm::FindOutputPin(pinId); }
 
                    if (newLinkPin && newLinkPin->kind == Pin::Kind::Input && reinterpret_cast<InputPin*>(newLinkPin)->isPinLinked())
                    {
                        showLabel("End Pin already linked", ImColor(45, 32, 32, 180));
                        ed::RejectNewItem(ImColor(255, 128, 128), 1.0F);
                    }
                    else
                    {
                        if (newLinkPin)
                        {
                            showLabel("+ Create Node", ImColor(32, 45, 32, 180));
                        }
 
                        if (ed::AcceptNewItem())
                        {
                            createNewNode = true;
                            newNodeLinkPin = nm::FindInputPin(pinId);
                            if (!newNodeLinkPin) { newNodeLinkPin = nm::FindOutputPin(pinId); }
                            newLinkPin = nullptr;
                            ed::Suspend();
                            ImGui::OpenPopup("Create New Node");
                            ed::Resume();
                        }
                    }
                }
            }
            else
            {
                newLinkPin = nullptr;
            }
 
            ed::EndCreate();
 
            if (ed::BeginDelete())
            {
                ed::LinkId linkId = 0;
                while (ed::QueryDeletedLink(&linkId))
                {
                    if (ed::AcceptDeletedItem())
                    {
                        bool deleted = false;
                        for (auto* node : nm::m_Nodes())
                        {
                            if (deleted) { break; }
                            for (auto& output : node->outputPins)
                            {
                                if (deleted) { break; }
                                for (const auto& link : output.links)
                                {
                                    if (link.linkId == linkId)
                                    {
                                        output.deleteLink(*link.getConnectedPin());
                                        deleted = true;
                                        break;
                                    }
                                }
                            }
                        }
                    }
                }
 
                ed::NodeId nodeId = 0;
                while (ed::QueryDeletedNode(&nodeId))
                {
                    if (Node* node = nm::FindNode(nodeId))
                    {
                        if (node->isTransient())
                        {
                            break;
                        }
                    }
                    if (ed::AcceptDeletedItem())
                    {
                        nm::DeleteNode(nodeId);
                    }
                }
            }
            ed::EndDelete();
        }
 
        ImGui::SetCursorScreenPos(cursorTopLeft);
    }
 
    // Shortcut enable/disable
    ax::NodeEditor::EnableShortcuts(ed::IsActive() || leftPaneActive);
 
    // auto openPopupPosition = ImGui::GetMousePos();
    ed::Suspend();
    if (ed::ShowNodeContextMenu(&contextNodeId))
    {
        ImGui::OpenPopup("Node Context Menu");
    }
    else if (ed::ShowPinContextMenu(&contextPinId))
    {
        ImGui::OpenPopup("Pin Context Menu");
    }
    else if (ed::ShowLinkContextMenu(&contextLinkId) && ed::IsActive())
    {
        ImGui::OpenPopup("Link Context Menu");
    }
    else if (ed::ShowBackgroundContextMenu() && ed::IsActive())
    {
        ImGui::OpenPopup("Create New Node");
        newNodeLinkPin = nullptr;
    }
    else if (ed::NodeId doubleClickedNodeId = ed::GetDoubleClickedNode())
    {
        Node* node = nm::FindNode(doubleClickedNodeId);
        node->_showConfig = true;
        node->_configWindowFocus = true;
    }
    ed::Resume();
 
    ed::Suspend();
    ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(8, 8));
    static Node* renameNode = nullptr;
    static Pin* renamePin = nullptr;
    if (ImGui::BeginPopup("Node Context Menu"))
    {
        auto* node = nm::FindNode(contextNodeId);
 
        ImGui::TextUnformatted("Node Context Menu");
        ImGui::Separator();
        if (node)
        {
            ImGui::Text("ID: %lu", size_t(node->id));
            ImGui::Text("Type: %s", node->type().c_str());
            ImGui::Text("Kind: %s", std::string(node->kind).c_str());
            ImGui::Text("Inputs: %lu", node->inputPins.size());
            ImGui::Text("Outputs: %lu", node->outputPins.size());
            ImGui::Text("State: %s", Node::toString(node->getState()).c_str());
            ImGui::Text("Mode: %s", node->getMode() == Node::Mode::POST_PROCESSING ? "Post-processing" : "Real-time");
            ImGui::Separator();
            if (node->kind != Node::Kind::GroupBox)
            {
                if (ImGui::MenuItem(node->isInitialized() ? "Reinitialize" : "Initialize", "",
                                    false, node->isInitialized() || node->getState() == Node::State::Deinitialized))
                {
                    if (node->isInitialized()) { node->doReinitialize(); }
                    else { node->doInitialize(); }
                }
                if (ImGui::MenuItem("Deinitialize", "", false, node->isInitialized()))
                {
                    node->doDeinitialize();
                }
                if (ImGui::MenuItem("Wake Worker"))
                {
                    node->wakeWorker();
                }
                ImGui::Separator();
                if (node->_hasConfig && ImGui::MenuItem("Configure", "", false))
                {
                    node->_showConfig = true;
                    node->_configWindowFocus = true;
                }
                if (ImGui::MenuItem(node->isDisabled() ? "Enable" : "Disable", "", false, !node->isTransient()))
                {
                    if (node->isDisabled())
                    {
                        node->doEnable();
                    }
                    else
                    {
                        node->doDisable();
                    }
                    flow::ApplyChanges();
                }
            }
            if (ImGui::MenuItem("Rename"))
            {
                renameNode = node;
            }
            ImGui::Separator();
            if (ImGui::MenuItem("Delete", "", false, !node->isTransient()))
            {
                ed::DeleteNode(contextNodeId);
            }
        }
        else
        {
            ImGui::Text("Unknown node: %lu", size_t(contextNodeId));
        }
 
        ImGui::EndPopup();
    }
 
    if (renameNode) // Popup for renaming a node
    {
        ShowRenameNodeRequest(renameNode);
    }
 
    if (ImGui::BeginPopup("Pin Context Menu"))
    {
        ImGui::TextUnformatted("Pin Context Menu");
        ImGui::Separator();
        if (auto* pin = nm::FindInputPin(contextPinId))
        {
            ImGui::Text("ID: %lu", size_t(pin->id));
            ImGui::Text("Node: %s", pin->parentNode ? std::to_string(size_t(pin->parentNode->id)).c_str() : "<none>");
            ImGui::Text("Type: %s", std::string(pin->type).c_str());
            ImGui::Separator();
            if (pin->isPinLinked())
            {
                const auto& link = pin->link;
                ImGui::SetNextItemOpen(true, ImGuiCond_Appearing);
                if (ImGui::TreeNode(fmt::format("LinkId: {}", size_t(link.linkId)).c_str()))
                {
                    ImGui::BulletText("Connected Node: %s", link.connectedNode->nameId().c_str());
                    ImGui::BulletText("Connected Pin:  %s (%zu)", link.getConnectedPin()->name.c_str(),
                                      size_t(link.getConnectedPin()->id));
                    ImGui::TreePop();
                }
            }
            else { ImGui::TextUnformatted("Link: Not linked"); }
            ImGui::Separator();
            if (ImGui::TreeNode(fmt::format("Queue: {}", pin->queue.size()).c_str()))
            {
                ImGui::BeginChild("QueueItems", ImVec2(ImGui::GetContentRegionAvail().x, 150), false, ImGuiWindowFlags_None);
                for (size_t i = 0; i < pin->queue.size(); i++) // NOLINT(modernize-loop-convert)
                {
                    ImGui::Text("%s", std::string(pin->queue.at(i)->insTime.toYMDHMS()).c_str());
                }
                ImGui::EndChild();
                ImGui::TreePop();
            }
 
            ImGui::Text("Queue blocked: %s", pin->queueBlocked ? "true" : "false");
            ImGui::Text("Temporal check: %s", pin->neededForTemporalQueueCheck ? "true" : "false");
            ImGui::Text("Drop queue: %s", pin->dropQueueIfNotFirable ? "true" : "false");
            ImGui::Separator();
            if (ImGui::MenuItem("Rename")) { renamePin = pin; }
        }
        else if (auto* pin = nm::FindOutputPin(contextPinId))
        {
            ImGui::Text("ID: %lu", size_t(pin->id));
            ImGui::Text("Node: %s", pin->parentNode ? std::to_string(size_t(pin->parentNode->id)).c_str() : "<none>");
            ImGui::Text("Type: %s", std::string(pin->type).c_str());
            ImGui::Text("Data available: %s", pin->noMoreDataAvailable ? "No" : "Yes");
            if (!pin->blocksConnectedNodeFromFinishing)
            {
                ImGui::TextUnformatted("Does not block connected pin from finishing!!!");
            }
            ImGui::Separator();
            if (pin->isPinLinked())
            {
                ImGui::SetNextItemOpen(true, ImGuiCond_Appearing);
                if (ImGui::TreeNode(fmt::format("Links: {}", pin->links.size()).c_str()))
                {
                    for (const auto& link : pin->links)
                    {
                        ImGui::SetNextItemOpen(true, ImGuiCond_Appearing);
                        if (ImGui::TreeNode(fmt::format("LinkId: {}", size_t(link.linkId)).c_str()))
                        {
                            ImGui::BulletText("Connected Node: %s", link.connectedNode->nameId().c_str());
                            ImGui::BulletText("Connected Pin:  %s (%zu)", link.getConnectedPin()->name.c_str(),
                                              size_t(link.getConnectedPin()->id));
                            ImGui::TreePop();
                        }
                    }
                    ImGui::TreePop();
                }
            }
            else { ImGui::TextUnformatted("Link: Not linked"); }
            ImGui::Separator();
            if (ImGui::MenuItem("Rename"))
            {
                renamePin = pin;
            }
        }
        else
        {
            ImGui::Text("Unknown pin: %lu", size_t(contextPinId));
        }
 
        ImGui::EndPopup();
    }
 
    if (renamePin) // Popup for renaming a pin
    {
        ShowRenamePinRequest(renamePin);
    }
 
    if (ImGui::BeginPopup("Link Context Menu"))
    {
        ax::NodeEditor::PinId startPinId = 0;
        ax::NodeEditor::PinId endPinId = 0;
        for (const auto* node : nm::m_Nodes())
        {
            if (startPinId) { break; }
            for (const auto& output : node->outputPins)
            {
                if (startPinId) { break; }
                for (const auto& link : output.links)
                {
                    if (link.linkId == contextLinkId)
                    {
                        startPinId = output.id;
                        endPinId = link.connectedPinId;
                        break;
                    }
                }
            }
        }
 
        ImGui::TextUnformatted("Link Context Menu");
        ImGui::Separator();
        if (startPinId)
        {
            ImGui::Text("ID: %lu", size_t(contextLinkId));
            ImGui::Text("From: %lu", size_t(startPinId));
            ImGui::Text("To: %lu", size_t(endPinId));
        }
        else
        {
            ImGui::Text("Unknown link: %lu", size_t(contextLinkId));
        }
        ImGui::Separator();
        if (ImGui::MenuItem("Delete"))
        {
            ed::DeleteLink(contextLinkId);
        }
        ImGui::EndPopup();
    }
 
    static bool setKeyboardFocus = true;
    static ImVec2 newNodeSpawnPos{ -1, -1 };
    if (ImGui::BeginPopup("Create New Node"))
    {
        if (newNodeSpawnPos.x == -1 || newNodeSpawnPos.y == -1)
        {
            auto viewRect = reinterpret_cast<ax::NodeEditor::Detail::EditorContext*>(ed::GetCurrentEditor())->GetViewRect();
            newNodeSpawnPos = ImGui::GetMousePos();
            newNodeSpawnPos.x -= leftPaneWidth + SPLITTER_THICKNESS + 10.0F;
            newNodeSpawnPos.y -= menuBarHeight;
 
            newNodeSpawnPos *= ed::GetCurrentZoom();
 
            newNodeSpawnPos += viewRect.GetTL();
 
            LOG_DEBUG("New Node will spawn at {}x{} - Zoom {}", newNodeSpawnPos.x, newNodeSpawnPos.y, ed::GetCurrentZoom());
        }
 
        if (setKeyboardFocus)
        {
            ImGui::SetKeyboardFocusHere(0);
        }
        static ImGuiTextFilter filter;
 
        filter.Draw("##NewNodeFilter");
 
        if (setKeyboardFocus)
        {
            filter.Clear();
            setKeyboardFocus = false;
        }
 
        Node* node = nullptr;
        for (const auto& [category, nodeInfoList] : NAV::NodeRegistry::RegisteredNodes())
        {
            // Prevent category from showing, if it is empty
            bool categoryHasItems = false;
            for (const auto& nodeInfo : nodeInfoList)
            {
                if (nodeInfo.hasCompatiblePin(newNodeLinkPin)
                    && (filter.PassFilter(nodeInfo.type.c_str()) || filter.PassFilter(category.c_str())))
                {
                    categoryHasItems = true;
                    break;
                }
            }
            if (categoryHasItems)
            {
                ImGui::SetNextItemOpen(true, ImGuiCond_Once);
                if (ImGui::TreeNode((category + "##NewNodeTree").c_str()))
                {
                    for (const auto& nodeInfo : nodeInfoList)
                    {
                        const auto& displayName = nodeInfo.type;
                        const auto& constructor = nodeInfo.constructor;
                        ImGui::Indent();
                        if (nodeInfo.hasCompatiblePin(newNodeLinkPin)
                            && (filter.PassFilter(nodeInfo.type.c_str()) || filter.PassFilter(category.c_str()))
                            && ImGui::MenuItem(displayName.c_str()))
                        {
                            filter.Clear();
                            node = constructor();
                            nm::AddNode(node);
                        }
                        ImGui::Unindent();
                    }
                    ImGui::TreePop();
                }
            }
        }
 
        if (node)
        {
            createNewNode = false;
 
            ed::SetNodePosition(node->id, newNodeSpawnPos);
            newNodeSpawnPos = { -1, -1 };
 
            if (auto* startPin = newNodeLinkPin)
            {
                if (startPin->kind == Pin::Kind::Input)
                {
                    for (auto& pin : node->outputPins)
                    {
                        if (reinterpret_cast<InputPin*>(startPin)->canCreateLink(pin))
                        {
                            pin.createLink(*reinterpret_cast<InputPin*>(startPin));
                            break;
                        }
                    }
                }
                else // if (startPin->kind == Pin::Kind::Output)
                {
                    for (auto& pin : node->inputPins)
                    {
                        if (reinterpret_cast<OutputPin*>(startPin)->canCreateLink(pin))
                        {
                            reinterpret_cast<OutputPin*>(startPin)->createLink(pin);
                            break;
                        }
                    }
                }
            }
        }
 
        ImGui::EndPopup();
    }
    else
    {
        setKeyboardFocus = true;
        createNewNode = false;
        newNodeSpawnPos = { -1, -1 };
    }
    ImGui::PopStyleVar();
 
    for (auto* node : nm::m_Nodes()) // Config Windows for nodes
    {
        if (node->_hasConfig && node->_showConfig)
        {
            ImVec2 center(ImGui::GetIO().DisplaySize.x * 0.5F, ImGui::GetIO().DisplaySize.y * 0.5F);
            if (node->_configWindowFocus)
            {
                ImGui::SetNextWindowCollapsed(false);
                ImGui::SetNextWindowFocus();
                node->_configWindowFocus = false;
            }
            ImGui::SetNextWindowPos(center, ImGuiCond_Appearing, ImVec2(0.5F, 0.5F));
            ImGui::SetNextWindowSize(node->_guiConfigDefaultWindowSize, ImGuiCond_FirstUseEver);
            if (!node->_configWindowMutex.try_lock())
            {
                ImGui::SetNextWindowCollapsed(true, ImGuiCond_Always);
                node->_configWindowForceCollapse = true;
            }
            else
            {
                node->_configWindowMutex.unlock();
                if (node->_configWindowForceCollapse)
                {
                    LOG_TRACE("Setting next window collapsed: {}", node->_configWindowIsCollapsed);
                    ImGui::SetNextWindowCollapsed(node->_configWindowIsCollapsed);
                    node->_configWindowForceCollapse = false;
                }
            }
            if (ImGui::Begin(fmt::format("{} ({})", node->nameId(), node->type()).c_str(), &(node->_showConfig),
                             ImGuiWindowFlags_None))
            {
                ImGui::PushFont(WindowFont());
                bool locked = node->_lockConfigDuringRun && (node->callbacksEnabled || FlowExecutor::isRunning());
                if (locked) { ImGui::BeginDisabled(); }
                if (!node->_configWindowForceCollapse)
                {
                    node->_configWindowIsCollapsed = false;
                    node->guiConfig();
                }
                if (locked) { ImGui::EndDisabled(); }
                ImGui::PopFont();
            }
            else // Window is collapsed
            {
                if (!node->_configWindowForceCollapse) { node->_configWindowIsCollapsed = true; }
                if (ImGui::IsWindowFocused())
                {
                    ed::EnableShortcuts(true);
                }
            }
 
            ImGui::End();
        }
    }
    ed::Resume();
 
    ed::End();
 
    ImGui::PushFont(PanelFont());
    ImGui::Indent(SPLITTER_THICKNESS);
    ImGui::SetNextItemOpen(true, ImGuiCond_Once);
    if (ImGui::BeginTabBar("BottomViewTabBar"))
    {
        bool noItemSelected = bottomViewSelectedTab == BottomViewTabItem::None;
        if (noItemSelected)
        {
            ImGui::PushStyleVar(ImGuiStyleVar_Alpha, 0.0F);
        }
        if (ImGui::BeginTabItem("▼"))
        {
            bottomViewSelectedTab = BottomViewTabItem::None;
            bottomViewHeight = BOTTOM_VIEW_COLLAPSED_MIN_HEIGHT * panelFontRatio();
            ImGui::EndTabItem();
        }
        else
        {
            bottomViewHeight = std::max(bottomViewHeight, BOTTOM_VIEW_UNCOLLAPSED_MIN_HEIGHT);
        }
        if (noItemSelected)
        {
            ImGui::PopStyleVar();
        }
 
        if (ImGui::BeginTabItem("Log Output", nullptr, firstFrame ? ImGuiTabItemFlags_SetSelected : ImGuiTabItemFlags_None))
        {
            static int scrollToBottom = 0;
            if (bottomViewSelectedTab != BottomViewTabItem::LogOutput)
            {
                scrollToBottom = 2;
            }
            bottomViewSelectedTab = BottomViewTabItem::LogOutput;
 
            static bool autoScroll = true;
            static ImGuiTextFilter textFilter;
 
            // Options menu
            if (ImGui::BeginPopup("Options"))
            {
                ImGui::Checkbox("Auto-scroll", &autoScroll);
                ImGui::EndPopup();
            }
 
            // Main window
            if (ImGui::Button("Options"))
            {
                ImGui::OpenPopup("Options");
            }
            ImGui::SameLine();
            ImGui::SetNextItemWidth(100.0F * panelFontRatio());
            static int logLevelFilterSelected = spdlog::level::info;
            if (ImGui::BeginCombo("##LogLevelCombo", spdlog::level::to_string_view(static_cast<spdlog::level::level_enum>(logLevelFilterSelected)).begin()))
            {
                for (int n = spdlog::level::debug; n < spdlog::level::critical; n++)
                {
                    const bool is_selected = (logLevelFilterSelected == n);
                    if (ImGui::Selectable(spdlog::level::to_string_view(static_cast<spdlog::level::level_enum>(n)).begin(), is_selected))
                    {
                        logLevelFilterSelected = n;
                    }
 
                    // Set the initial focus when opening the combo (scrolling + keyboard navigation focus)
                    if (is_selected)
                    {
                        ImGui::SetItemDefaultFocus();
                    }
                }
                ImGui::EndCombo();
            }
            ImGui::SameLine();
            textFilter.Draw("Filter", -100.0F);
 
            ImGui::Separator();
            ImGui::BeginChild("scrolling", ImVec2(0, 0), false, ImGuiWindowFlags_HorizontalScrollbar);
            {
                ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0, 0));
                ImGui::PushFont(MonoFont());
 
                auto logMessages = Logger::GetRingBufferSink()->last_formatted();
 
                for (auto& logLine : logMessages)
                {
                    for (int n = logLevelFilterSelected; n < spdlog::level::n_levels; n++)
                    {
                        if (logLine.find(fmt::format("] [{}]", spdlog::level::to_short_c_str(static_cast<spdlog::level::level_enum>(n)))) != std::string::npos)
                        {
                            if (!textFilter.IsActive() || textFilter.PassFilter(logLine.c_str()))
                            {
                                // str::replace(logLine, "[T]", "\033[30m[T]\033[0m");
                                str::replace(logLine, "[D]", "\033[36m[D]\033[0m");
                                str::replace(logLine, "[I]", "\033[32m[I]\033[0m");
                                str::replace(logLine, "[W]", "\033[33m[W]\033[0m");
                                str::replace(logLine, "[E]", "\033[31m[E]\033[0m");
                                ImGui::TextAnsiUnformatted(logLine.c_str());
                                // ImGui::TextAnsiUnformatted("\033[31;1;4mHello\033[0mtt");
                            }
                            break;
                        }
                    }
                }
                ImGui::PopFont();
                ImGui::PopStyleVar();
 
                if (scrollToBottom)
                {
                    ImGui::SetScrollHereY(1.0F);
                    scrollToBottom--;
                }
                else if (autoScroll && ImGui::GetScrollY() >= ImGui::GetScrollMaxY())
                {
                    ImGui::SetScrollHereY(1.0F);
                }
            }
            ImGui::EndChild();
 
            ImGui::EndTabItem();
        }
        ImGui::EndTabBar();
    }
    ImGui::Unindent();
    ImGui::PopFont();
 
    ImGui::EndGroup();
 
    FlowAnimation::ProcessQueue();
 
    // Push the Tooltip on the stack if needed
    if (!tooltipText.empty()) { ImGui::SetTooltip("%s", tooltipText.c_str()); }
 
    ImGui::PushFont(WindowFont());
    gui::windows::renderGlobalWindows(m_colors, m_colorsNames);
    ImGui::PopFont();
 
    std::string title = (flow::HasUnsavedChanges() ? "● " : "")
                        + (flow::GetCurrentFilename().empty() ? "" : flow::GetCurrentFilename() + " - ")
                        + "INSTINCT";
    SetTitle(title.c_str());
}
 
float NAV::gui::NodeEditorApplication::defaultFontRatio()
{
    return defaultFontSize.at(isUsingBigDefaultFont() ? 1 : 0) / defaultFontSize[0];
}
 
float NAV::gui::NodeEditorApplication::windowFontRatio()
{
    return windowFontSize.at(isUsingBigWindowFont() ? 1 : 0) / windowFontSize[0];
}
 
float NAV::gui::NodeEditorApplication::panelFontRatio()
{
    return panelFontSize.at(isUsingBigPanelFont() ? 1 : 0) / panelFontSize[0];
}
 
float NAV::gui::NodeEditorApplication::monoFontRatio()
{
    return monoFontSize.at(isUsingBigMonoFont() ? 1 : 0) / monoFontSize[0];
}
 
float NAV::gui::NodeEditorApplication::headerFontRatio()
{
    return headerFontSize.at(isUsingBigHeaderFont() ? 1 : 0) / headerFontSize[0];
}