palette_editor.cc

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#include "palette_editor.h"
 
#include "absl/status/status.h"
#include "absl/strings/str_cat.h"
#include "app/editor/palette/palette_category.h"
#include "app/editor/system/panel_manager.h"
#include "app/gfx/debug/performance/performance_profiler.h"
#include "app/gfx/types/snes_palette.h"
#include "app/gfx/util/palette_manager.h"
#include "app/gui/app/editor_layout.h"
#include "app/gui/core/color.h"
#include "app/gui/core/icons.h"
#include "app/gui/core/popup_id.h"
#include "app/gui/core/search.h"
#include "imgui/imgui.h"
 
namespace yaze {
namespace editor {
 
using ImGui::AcceptDragDropPayload;
using ImGui::BeginChild;
using ImGui::BeginDragDropTarget;
using ImGui::BeginGroup;
using ImGui::BeginPopup;
using ImGui::BeginPopupContextItem;
using ImGui::Button;
using ImGui::ColorButton;
using ImGui::ColorPicker4;
using ImGui::EndChild;
using ImGui::EndDragDropTarget;
using ImGui::EndGroup;
using ImGui::EndPopup;
using ImGui::GetStyle;
using ImGui::OpenPopup;
using ImGui::PopID;
using ImGui::PushID;
using ImGui::SameLine;
using ImGui::Selectable;
using ImGui::Separator;
using ImGui::SetClipboardText;
using ImGui::Text;
 
using namespace gfx;
 
constexpr ImGuiTableFlags kPaletteTableFlags =
    ImGuiTableFlags_Reorderable | ImGuiTableFlags_Resizable |
    ImGuiTableFlags_SizingStretchSame | ImGuiTableFlags_Hideable;
 
constexpr ImGuiColorEditFlags kPalNoAlpha = ImGuiColorEditFlags_NoAlpha;
 
constexpr ImGuiColorEditFlags kPalButtonFlags = ImGuiColorEditFlags_NoAlpha |
                                                ImGuiColorEditFlags_NoPicker |
                                                ImGuiColorEditFlags_NoTooltip;
 
constexpr ImGuiColorEditFlags kColorPopupFlags =
    ImGuiColorEditFlags_NoInputs | ImGuiColorEditFlags_NoAlpha |
    ImGuiColorEditFlags_DisplayRGB | ImGuiColorEditFlags_DisplayHSV |
    ImGuiColorEditFlags_DisplayHex;
 
namespace {
int CustomFormatString(char* buf, size_t buf_size, const char* fmt, ...) {
  va_list args;
  va_start(args, fmt);
#ifdef IMGUI_USE_STB_SPRINTF
  int w = stbsp_vsnprintf(buf, (int)buf_size, fmt, args);
#else
  int w = vsnprintf(buf, buf_size, fmt, args);
#endif
  va_end(args);
  if (buf == nullptr)
    return w;
  if (w == -1 || w >= (int)buf_size)
    w = (int)buf_size - 1;
  buf[w] = 0;
  return w;
}
 
static inline float color_saturate(float f) {
  return (f < 0.0f) ? 0.0f : (f > 1.0f) ? 1.0f : f;
}
 
#define F32_TO_INT8_SAT(_VAL)            \
  ((int)(color_saturate(_VAL) * 255.0f + \
         0.5f))  // Saturated, always output 0..255
}  // namespace
 
absl::Status DisplayPalette(gfx::SnesPalette& palette, bool loaded) {
  static ImVec4 color = ImVec4(0, 0, 0, 255.f);
  static ImVec4 current_palette[256] = {};
  ImGuiColorEditFlags misc_flags = ImGuiColorEditFlags_AlphaPreview |
                                   ImGuiColorEditFlags_NoDragDrop |
                                   ImGuiColorEditFlags_NoOptions;
 
  // Generate a default palette. The palette will persist and can be edited.
  static bool init = false;
  if (loaded && !init) {
    for (int n = 0; n < palette.size(); n++) {
      auto color = palette[n];
      current_palette[n].x = color.rgb().x / 255;
      current_palette[n].y = color.rgb().y / 255;
      current_palette[n].z = color.rgb().z / 255;
      current_palette[n].w = 255;  // Alpha
    }
    init = true;
  }
 
  static ImVec4 backup_color;
  bool open_popup = ColorButton("MyColor##3b", color, misc_flags);
  SameLine(0, GetStyle().ItemInnerSpacing.x);
  open_popup |= Button("Palette");
  if (open_popup) {
    OpenPopup(gui::MakePopupId(gui::EditorNames::kPalette,
                               gui::PopupNames::kColorPicker)
                  .c_str());
    backup_color = color;
  }
 
  if (BeginPopup(gui::MakePopupId(gui::EditorNames::kPalette,
                                  gui::PopupNames::kColorPicker)
                     .c_str())) {
    TEXT_WITH_SEPARATOR("Current Overworld Palette");
    ColorPicker4("##picker", (float*)&color,
                 misc_flags | ImGuiColorEditFlags_NoSidePreview |
                     ImGuiColorEditFlags_NoSmallPreview);
    SameLine();
 
    BeginGroup();  // Lock X position
    Text("Current ==>");
    SameLine();
    Text("Previous");
 
    if (Button("Update Map Palette")) {}
 
    ColorButton(
        "##current", color,
        ImGuiColorEditFlags_NoPicker | ImGuiColorEditFlags_AlphaPreviewHalf,
        ImVec2(60, 40));
    SameLine();
 
    if (ColorButton(
            "##previous", backup_color,
            ImGuiColorEditFlags_NoPicker | ImGuiColorEditFlags_AlphaPreviewHalf,
            ImVec2(60, 40)))
      color = backup_color;
 
    // List of Colors in Overworld Palette
    Separator();
    Text("Palette");
    for (int n = 0; n < IM_ARRAYSIZE(current_palette); n++) {
      PushID(n);
      if ((n % 8) != 0)
        SameLine(0.0f, GetStyle().ItemSpacing.y);
 
      if (ColorButton("##palette", current_palette[n], kPalButtonFlags,
                      ImVec2(20, 20)))
        color = ImVec4(current_palette[n].x, current_palette[n].y,
                       current_palette[n].z, color.w);  // Preserve alpha!
 
      if (BeginDragDropTarget()) {
        if (const ImGuiPayload* payload =
                AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_3F))
          memcpy((float*)&current_palette[n], payload->Data, sizeof(float) * 3);
        if (const ImGuiPayload* payload =
                AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_4F))
          memcpy((float*)&current_palette[n], payload->Data, sizeof(float) * 4);
        EndDragDropTarget();
      }
 
      PopID();
    }
    EndGroup();
    EndPopup();
  }
 
  return absl::OkStatus();
}
 
void PaletteEditor::Initialize() {
  // Register all panels with PanelManager (done once during
  // initialization)
  if (!dependencies_.panel_manager)
    return;
  auto* panel_manager = dependencies_.panel_manager;
  const size_t session_id = dependencies_.session_id;
 
  panel_manager->RegisterPanel({.card_id = "palette.control_panel",
                               .display_name = "Palette Controls",
                               .window_title = " Group Manager",
                               .icon = ICON_MD_PALETTE,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Shift+P",
                               .visibility_flag = &show_control_panel_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 10});
 
  panel_manager->RegisterPanel({.card_id = "palette.ow_main",
                               .display_name = "Overworld Main",
                               .window_title = " Overworld Main",
                               .icon = ICON_MD_LANDSCAPE,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Alt+1",
                               .visibility_flag = &show_ow_main_panel_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 20});
 
  panel_manager->RegisterPanel({.card_id = "palette.ow_animated",
                               .display_name = "Overworld Animated",
                               .window_title = " Overworld Animated",
                               .icon = ICON_MD_WATER,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Alt+2",
                               .visibility_flag = &show_ow_animated_panel_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 30});
 
  panel_manager->RegisterPanel({.card_id = "palette.dungeon_main",
                               .display_name = "Dungeon Main",
                               .window_title = " Dungeon Main",
                               .icon = ICON_MD_CASTLE,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Alt+3",
                               .visibility_flag = &show_dungeon_main_panel_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 40});
 
  panel_manager->RegisterPanel({.card_id = "palette.sprites",
                               .display_name = "Global Sprite Palettes",
                               .window_title = " SNES Palette",
                               .icon = ICON_MD_PETS,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Alt+4",
                               .visibility_flag = &show_sprite_panel_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 50});
 
  panel_manager->RegisterPanel({.card_id = "palette.sprites_aux1",
                               .display_name = "Sprites Aux 1",
                               .window_title = " Sprites Aux 1",
                               .icon = ICON_MD_FILTER_1,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Alt+7",
                               .visibility_flag = &show_sprites_aux1_panel_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 51});
 
  panel_manager->RegisterPanel({.card_id = "palette.sprites_aux2",
                               .display_name = "Sprites Aux 2",
                               .window_title = " Sprites Aux 2",
                               .icon = ICON_MD_FILTER_2,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Alt+8",
                               .visibility_flag = &show_sprites_aux2_panel_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 52});
 
  panel_manager->RegisterPanel({.card_id = "palette.sprites_aux3",
                               .display_name = "Sprites Aux 3",
                               .window_title = " Sprites Aux 3",
                               .icon = ICON_MD_FILTER_3,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Alt+9",
                               .visibility_flag = &show_sprites_aux3_panel_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 53});
 
  panel_manager->RegisterPanel({.card_id = "palette.equipment",
                               .display_name = "Equipment Palettes",
                               .window_title = " Equipment Palettes",
                               .icon = ICON_MD_SHIELD,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Alt+5",
                               .visibility_flag = &show_equipment_panel_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 60});
 
  panel_manager->RegisterPanel({.card_id = "palette.quick_access",
                               .display_name = "Quick Access",
                               .window_title = " Color Harmony",
                               .icon = ICON_MD_COLOR_LENS,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Alt+Q",
                               .visibility_flag = &show_quick_access_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 70});
 
  panel_manager->RegisterPanel({.card_id = "palette.custom",
                               .display_name = "Custom Palette",
                               .window_title = " Palette Editor",
                               .icon = ICON_MD_BRUSH,
                               .category = "Palette",
                               .shortcut_hint = "Ctrl+Alt+C",
                               .visibility_flag = &show_custom_palette_,
                               .enabled_condition = [this]() { return rom_ && rom_->is_loaded(); },
                               .disabled_tooltip = "Load a ROM first",
                               .priority = 80});
 
  // Show control panel by default when Palette Editor is activated
  panel_manager->ShowPanel(session_id, "palette.control_panel");
}
 
// ============================================================================
// Helper Panel Classes
// ============================================================================
 
class PaletteControlPanel : public EditorPanel {
 public:
  explicit PaletteControlPanel(std::function<void()> draw_callback)
      : draw_callback_(std::move(draw_callback)) {}
 
  std::string GetId() const override { return "palette.control_panel"; }
  std::string GetDisplayName() const override { return "Palette Controls"; }
  std::string GetIcon() const override { return ICON_MD_PALETTE; }
  std::string GetEditorCategory() const override { return "Palette"; }
  int GetPriority() const override { return 10; }
  
  void Draw(bool* p_open) override {
    if (p_open && !*p_open) return;
    if (draw_callback_) draw_callback_();
  }
 
 private:
  std::function<void()> draw_callback_;
};
 
class QuickAccessPalettePanel : public EditorPanel {
 public:
  explicit QuickAccessPalettePanel(std::function<void()> draw_callback)
      : draw_callback_(std::move(draw_callback)) {}
 
  std::string GetId() const override { return "palette.quick_access"; }
  std::string GetDisplayName() const override { return "Quick Access"; }
  std::string GetIcon() const override { return ICON_MD_COLOR_LENS; }
  std::string GetEditorCategory() const override { return "Palette"; }
  int GetPriority() const override { return 70; }
  
  void Draw(bool* p_open) override {
    if (p_open && !*p_open) return;
    if (draw_callback_) draw_callback_();
  }
 
 private:
  std::function<void()> draw_callback_;
};
 
class CustomPalettePanel : public EditorPanel {
 public:
  explicit CustomPalettePanel(std::function<void()> draw_callback)
      : draw_callback_(std::move(draw_callback)) {}
 
  std::string GetId() const override { return "palette.custom"; }
  std::string GetDisplayName() const override { return "Custom Palette"; }
  std::string GetIcon() const override { return ICON_MD_BRUSH; }
  std::string GetEditorCategory() const override { return "Palette"; }
  int GetPriority() const override { return 80; }
  
  void Draw(bool* p_open) override {
    if (p_open && !*p_open) return;
    if (draw_callback_) draw_callback_();
  }
 
 private:
  std::function<void()> draw_callback_;
};
 
absl::Status PaletteEditor::Load() {
  gfx::ScopedTimer timer("PaletteEditor::Load");
 
  if (!rom() || !rom()->is_loaded()) {
    return absl::NotFoundError("ROM not open, no palettes to display");
  }
 
  // Initialize the labels
  for (int i = 0; i < kNumPalettes; i++) {
    rom()->resource_label()->CreateOrGetLabel(
        "Palette Group Name", std::to_string(i),
        std::string(kPaletteGroupNames[i]));
  }
 
  // Initialize the centralized PaletteManager with GameData
  // This must be done before creating any palette cards
  if (game_data()) {
    gfx::PaletteManager::Get().Initialize(game_data());
  } else {
    // Fallback to legacy ROM-only initialization
    gfx::PaletteManager::Get().Initialize(rom_);
  }
 
  // Also set up the embedded GfxGroupEditor
  gfx_group_editor_.SetRom(rom_);
  gfx_group_editor_.SetGameData(game_data());
 
  // Register EditorPanel instances with PanelManager
  if (dependencies_.panel_manager) {
    auto* panel_manager = dependencies_.panel_manager;
 
    // Create and register palette panels
    // Note: PanelManager takes ownership via unique_ptr
 
    // Overworld Main
    auto ow_main = std::make_unique<OverworldMainPalettePanel>(rom_, game_data());
    ow_main_panel_ = ow_main.get();
    panel_manager->RegisterEditorPanel(std::move(ow_main));
 
    // Overworld Animated
    auto ow_anim = std::make_unique<OverworldAnimatedPalettePanel>(rom_, game_data());
    ow_anim_panel_ = ow_anim.get();
    panel_manager->RegisterEditorPanel(std::move(ow_anim));
 
    // Dungeon Main
    auto dungeon_main = std::make_unique<DungeonMainPalettePanel>(rom_, game_data());
    dungeon_main_panel_ = dungeon_main.get();
    panel_manager->RegisterEditorPanel(std::move(dungeon_main));
 
    // Global Sprites
    auto sprite_global = std::make_unique<SpritePalettePanel>(rom_, game_data());
    sprite_global_panel_ = sprite_global.get();
    panel_manager->RegisterEditorPanel(std::move(sprite_global));
 
    // Sprites Aux 1
    auto sprite_aux1 = std::make_unique<SpritesAux1PalettePanel>(rom_, game_data());
    sprite_aux1_panel_ = sprite_aux1.get();
    panel_manager->RegisterEditorPanel(std::move(sprite_aux1));
 
    // Sprites Aux 2
    auto sprite_aux2 = std::make_unique<SpritesAux2PalettePanel>(rom_, game_data());
    sprite_aux2_panel_ = sprite_aux2.get();
    panel_manager->RegisterEditorPanel(std::move(sprite_aux2));
 
    // Sprites Aux 3
    auto sprite_aux3 = std::make_unique<SpritesAux3PalettePanel>(rom_, game_data());
    sprite_aux3_panel_ = sprite_aux3.get();
    panel_manager->RegisterEditorPanel(std::move(sprite_aux3));
 
    // Equipment
    auto equipment = std::make_unique<EquipmentPalettePanel>(rom_, game_data());
    equipment_panel_ = equipment.get();
    panel_manager->RegisterEditorPanel(std::move(equipment));
 
    // Register utility panels with callbacks
    panel_manager->RegisterEditorPanel(std::make_unique<PaletteControlPanel>(
        [this]() { DrawControlPanel(); }));
    panel_manager->RegisterEditorPanel(std::make_unique<QuickAccessPalettePanel>(
        [this]() { DrawQuickAccessPanel(); }));
    panel_manager->RegisterEditorPanel(std::make_unique<CustomPalettePanel>(
        [this]() { DrawCustomPalettePanel(); }));
  }
 
  return absl::OkStatus();
}
 
absl::Status PaletteEditor::Save() {
  if (!rom_ || !rom_->is_loaded()) {
    return absl::FailedPreconditionError("ROM not loaded");
  }
 
  // Delegate to PaletteManager for centralized save
  RETURN_IF_ERROR(gfx::PaletteManager::Get().SaveAllToRom());
 
  // Mark ROM as needing file save
  rom_->set_dirty(true);
 
  return absl::OkStatus();
}
 
absl::Status PaletteEditor::Undo() {
  if (!gfx::PaletteManager::Get().IsInitialized()) {
    return absl::FailedPreconditionError("PaletteManager not initialized");
  }
 
  gfx::PaletteManager::Get().Undo();
  return absl::OkStatus();
}
 
absl::Status PaletteEditor::Redo() {
  if (!gfx::PaletteManager::Get().IsInitialized()) {
    return absl::FailedPreconditionError("PaletteManager not initialized");
  }
 
  gfx::PaletteManager::Get().Redo();
  return absl::OkStatus();
}
 
absl::Status PaletteEditor::Update() {
  // Panel drawing is handled centrally by PanelManager::DrawAllVisiblePanels()
  // via the EditorPanel implementations registered in Load().
  // No local drawing needed here - this fixes duplicate panel rendering.
  return absl::OkStatus();
}
 
void PaletteEditor::DrawQuickAccessTab() {
  BeginChild("QuickAccessPalettes", ImVec2(0, 0), true);
 
  Text("Custom Palette");
  DrawCustomPalette();
 
  Separator();
 
  // Current color picker with more options
  BeginGroup();
  Text("Current Color");
  gui::SnesColorEdit4("##CurrentColorPicker", &current_color_,
                      kColorPopupFlags);
 
  char buf[64];
  auto col = current_color_.rgb();
  int cr = F32_TO_INT8_SAT(col.x / 255.0f);
  int cg = F32_TO_INT8_SAT(col.y / 255.0f);
  int cb = F32_TO_INT8_SAT(col.z / 255.0f);
 
  CustomFormatString(buf, IM_ARRAYSIZE(buf), "RGB: %d, %d, %d", cr, cg, cb);
  Text("%s", buf);
 
  CustomFormatString(buf, IM_ARRAYSIZE(buf), "SNES: $%04X",
                     current_color_.snes());
  Text("%s", buf);
 
  if (Button("Copy to Clipboard")) {
    SetClipboardText(buf);
  }
  EndGroup();
 
  Separator();
 
  // Recently used colors
  Text("Recently Used Colors");
  for (int i = 0; i < recently_used_colors_.size(); i++) {
    PushID(i);
    if (i % 8 != 0)
      SameLine();
    ImVec4 displayColor =
        gui::ConvertSnesColorToImVec4(recently_used_colors_[i]);
    if (ImGui::ColorButton("##recent", displayColor)) {
      // Set as current color
      current_color_ = recently_used_colors_[i];
    }
    PopID();
  }
 
  EndChild();
}
 
void PaletteEditor::DrawCustomPalette() {
  if (BeginChild("ColorPalette", ImVec2(0, 40), ImGuiChildFlags_None,
                 ImGuiWindowFlags_HorizontalScrollbar)) {
    for (int i = 0; i < custom_palette_.size(); i++) {
      PushID(i);
      if (i > 0)
        SameLine(0.0f, GetStyle().ItemSpacing.y);
 
      // Enhanced color button with context menu and drag-drop support
      ImVec4 displayColor = gui::ConvertSnesColorToImVec4(custom_palette_[i]);
      bool open_color_picker = ImGui::ColorButton(
          absl::StrFormat("##customPal%d", i).c_str(), displayColor);
 
      if (open_color_picker) {
        current_color_ = custom_palette_[i];
        edit_palette_index_ = i;
        ImGui::OpenPopup(
            gui::MakePopupId(gui::EditorNames::kPalette, "CustomPaletteColorEdit")
                .c_str());
      }
 
      if (BeginPopupContextItem()) {
        // Edit color directly in the popup
        SnesColor original_color = custom_palette_[i];
        if (gui::SnesColorEdit4("Edit Color", &custom_palette_[i],
                                kColorPopupFlags)) {
          // Color was changed, add to recently used
          AddRecentlyUsedColor(custom_palette_[i]);
        }
 
        if (Button("Delete", ImVec2(-1, 0))) {
          custom_palette_.erase(custom_palette_.begin() + i);
        }
      }
 
      // Handle drag/drop for palette rearrangement
      if (BeginDragDropTarget()) {
        if (const ImGuiPayload* payload =
                AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_3F)) {
          ImVec4 color;
          memcpy((float*)&color, payload->Data, sizeof(float) * 3);
          color.w = 1.0f;  // Set alpha to 1.0
          custom_palette_[i] = SnesColor(color);
          AddRecentlyUsedColor(custom_palette_[i]);
        }
        EndDragDropTarget();
      }
 
      PopID();
    }
 
    SameLine();
    if (ImGui::Button("+")) {
      custom_palette_.push_back(SnesColor(0x7FFF));
    }
 
    SameLine();
    if (ImGui::Button("Clear")) {
      custom_palette_.clear();
    }
 
    SameLine();
    if (ImGui::Button("Export")) {
      std::string clipboard;
      for (const auto& color : custom_palette_) {
        clipboard += absl::StrFormat("$%04X,", color.snes());
      }
      SetClipboardText(clipboard.c_str());
    }
  }
  EndChild();
 
  // Color picker popup for custom palette editing
  if (ImGui::BeginPopup(
          gui::MakePopupId(gui::EditorNames::kPalette, "CustomPaletteColorEdit")
              .c_str())) {
    if (edit_palette_index_ >= 0 &&
        edit_palette_index_ < custom_palette_.size()) {
      SnesColor original_color = custom_palette_[edit_palette_index_];
      if (gui::SnesColorEdit4(
              "Edit Color", &custom_palette_[edit_palette_index_],
              kColorPopupFlags | ImGuiColorEditFlags_PickerHueWheel)) {
        // Color was changed, add to recently used
        AddRecentlyUsedColor(custom_palette_[edit_palette_index_]);
      }
    }
    ImGui::EndPopup();
  }
}
 
absl::Status PaletteEditor::DrawPaletteGroup(int category,
                                             bool /*right_side*/) {
  if (!rom()->is_loaded() || !game_data()) {
    return absl::NotFoundError("ROM not open, no palettes to display");
  }
 
  auto palette_group_name = kPaletteGroupNames[category];
  gfx::PaletteGroup* palette_group =
      game_data()->palette_groups.get_group(palette_group_name.data());
  const auto size = palette_group->size();
 
  for (int j = 0; j < size; j++) {
    gfx::SnesPalette* palette = palette_group->mutable_palette(j);
    auto pal_size = palette->size();
 
    BeginGroup();
 
    PushID(j);
    BeginGroup();
    rom()->resource_label()->SelectableLabelWithNameEdit(
        false, palette_group_name.data(), /*key=*/std::to_string(j),
        "Unnamed Palette");
    EndGroup();
 
    for (int n = 0; n < pal_size; n++) {
      PushID(n);
      if (n > 0 && n % 8 != 0)
        SameLine(0.0f, 2.0f);
 
      auto popup_id =
          absl::StrCat(kPaletteCategoryNames[category].data(), j, "_", n);
 
      ImVec4 displayColor = gui::ConvertSnesColorToImVec4((*palette)[n]);
      if (ImGui::ColorButton(popup_id.c_str(), displayColor)) {
        current_color_ = (*palette)[n];
        AddRecentlyUsedColor(current_color_);
      }
 
      if (BeginPopupContextItem(popup_id.c_str())) {
        RETURN_IF_ERROR(HandleColorPopup(*palette, category, j, n))
      }
      PopID();
    }
    PopID();
    EndGroup();
 
    if (j < size - 1) {
      Separator();
    }
  }
  return absl::OkStatus();
}
 
void PaletteEditor::AddRecentlyUsedColor(const SnesColor& color) {
  // Check if color already exists in recently used
  auto it = std::find_if(
      recently_used_colors_.begin(), recently_used_colors_.end(),
      [&color](const SnesColor& c) { return c.snes() == color.snes(); });
 
  // If found, remove it to re-add at front
  if (it != recently_used_colors_.end()) {
    recently_used_colors_.erase(it);
  }
 
  // Add at front
  recently_used_colors_.insert(recently_used_colors_.begin(), color);
 
  // Limit size
  if (recently_used_colors_.size() > 16) {
    recently_used_colors_.pop_back();
  }
}
 
absl::Status PaletteEditor::HandleColorPopup(gfx::SnesPalette& palette, int i,
                                             int j, int n) {
  auto col = gfx::ToFloatArray(palette[n]);
  auto original_color = palette[n];
 
  if (gui::SnesColorEdit4("Edit Color", &palette[n], kColorPopupFlags)) {
    history_.RecordChange(/*group_name=*/std::string(kPaletteGroupNames[i]),
                          /*palette_index=*/j, /*color_index=*/n,
                          original_color, palette[n]);
    palette[n].set_modified(true);
 
    // Add to recently used colors
    AddRecentlyUsedColor(palette[n]);
  }
 
  // Color information display
  char buf[64];
  int cr = F32_TO_INT8_SAT(col[0]);
  int cg = F32_TO_INT8_SAT(col[1]);
  int cb = F32_TO_INT8_SAT(col[2]);
 
  Text("RGB: %d, %d, %d", cr, cg, cb);
  Text("SNES: $%04X", palette[n].snes());
 
  Separator();
 
  if (Button("Copy as..", ImVec2(-1, 0)))
    OpenPopup(gui::MakePopupId(gui::EditorNames::kPalette,
                               gui::PopupNames::kCopyPopup)
                  .c_str());
  if (BeginPopup(gui::MakePopupId(gui::EditorNames::kPalette,
                                  gui::PopupNames::kCopyPopup)
                     .c_str())) {
    CustomFormatString(buf, IM_ARRAYSIZE(buf), "(%.3ff, %.3ff, %.3ff)", col[0],
                       col[1], col[2]);
    if (Selectable(buf))
      SetClipboardText(buf);
 
    CustomFormatString(buf, IM_ARRAYSIZE(buf), "(%d,%d,%d)", cr, cg, cb);
    if (Selectable(buf))
      SetClipboardText(buf);
 
    CustomFormatString(buf, IM_ARRAYSIZE(buf), "#%02X%02X%02X", cr, cg, cb);
    if (Selectable(buf))
      SetClipboardText(buf);
 
    // SNES Format
    CustomFormatString(buf, IM_ARRAYSIZE(buf), "$%04X",
                       ConvertRgbToSnes(ImVec4(col[0], col[1], col[2], 1.0f)));
    if (Selectable(buf))
      SetClipboardText(buf);
 
    EndPopup();
  }
 
  // Add a button to add this color to custom palette
  if (Button("Add to Custom Palette", ImVec2(-1, 0))) {
    custom_palette_.push_back(palette[n]);
  }
 
  EndPopup();
  return absl::OkStatus();
}
 
absl::Status PaletteEditor::EditColorInPalette(gfx::SnesPalette& palette,
                                               int index) {
  if (index >= palette.size()) {
    return absl::InvalidArgumentError("Index out of bounds");
  }
 
  // Get the current color
  auto color = palette[index];
  auto currentColor = color.rgb();
  if (ColorPicker4("Color Picker", (float*)&palette[index])) {
    // The color was modified, update it in the palette
    palette[index] = gui::ConvertImVec4ToSnesColor(currentColor);
 
    // Add to recently used colors
    AddRecentlyUsedColor(palette[index]);
  }
  return absl::OkStatus();
}
 
absl::Status PaletteEditor::ResetColorToOriginal(
    gfx::SnesPalette& palette, int index,
    const gfx::SnesPalette& originalPalette) {
  if (index >= palette.size() || index >= originalPalette.size()) {
    return absl::InvalidArgumentError("Index out of bounds");
  }
  auto color = originalPalette[index];
  auto originalColor = color.rgb();
  palette[index] = gui::ConvertImVec4ToSnesColor(originalColor);
  return absl::OkStatus();
}
 
// ============================================================================
// Panel-Based UI Methods
// ============================================================================
 
void PaletteEditor::DrawToolset() {
  // Sidebar is drawn by PanelManager in EditorManager
  // Panels registered in Initialize() appear in the sidebar automatically
}
 
void PaletteEditor::DrawControlPanel() {
  ImGui::SetNextWindowSize(ImVec2(320, 420), ImGuiCond_FirstUseEver);
  ImGui::SetNextWindowPos(ImVec2(10, 100), ImGuiCond_FirstUseEver);
 
  ImGuiWindowFlags flags = ImGuiWindowFlags_None;
 
  if (ImGui::Begin(ICON_MD_PALETTE " Palette Controls", &show_control_panel_,
                   flags)) {
    // Toolbar with quick toggles
    DrawToolset();
 
    ImGui::Separator();
 
    // Categorized palette list with search
    DrawCategorizedPaletteList();
 
    ImGui::Separator();
 
    // Modified status indicator
    ImGui::TextColored(ImVec4(1.0f, 0.6f, 0.0f, 1.0f), "Modified Panels:");
    bool any_modified = false;
 
    if (ow_main_panel_ && ow_main_panel_->HasUnsavedChanges()) {
      ImGui::BulletText("Overworld Main");
      any_modified = true;
    }
    if (ow_anim_panel_ && ow_anim_panel_->HasUnsavedChanges()) {
      ImGui::BulletText("Overworld Animated");
      any_modified = true;
    }
    if (dungeon_main_panel_ && dungeon_main_panel_->HasUnsavedChanges()) {
      ImGui::BulletText("Dungeon Main");
      any_modified = true;
    }
    if (sprite_global_panel_ && sprite_global_panel_->HasUnsavedChanges()) {
      ImGui::BulletText("Global Sprite Palettes");
      any_modified = true;
    }
    if (sprite_aux1_panel_ && sprite_aux1_panel_->HasUnsavedChanges()) {
      ImGui::BulletText("Sprites Aux 1");
      any_modified = true;
    }
    if (sprite_aux2_panel_ && sprite_aux2_panel_->HasUnsavedChanges()) {
      ImGui::BulletText("Sprites Aux 2");
      any_modified = true;
    }
    if (sprite_aux3_panel_ && sprite_aux3_panel_->HasUnsavedChanges()) {
      ImGui::BulletText("Sprites Aux 3");
      any_modified = true;
    }
    if (equipment_panel_ && equipment_panel_->HasUnsavedChanges()) {
      ImGui::BulletText("Equipment Palettes");
      any_modified = true;
    }
 
    if (!any_modified) {
      ImGui::TextDisabled("No unsaved changes");
    }
 
    ImGui::Separator();
 
    // Quick actions
    ImGui::Text("Quick Actions:");
 
    // Use centralized PaletteManager for global operations
    bool has_unsaved = gfx::PaletteManager::Get().HasUnsavedChanges();
    size_t modified_count = gfx::PaletteManager::Get().GetModifiedColorCount();
 
    ImGui::BeginDisabled(!has_unsaved);
    if (ImGui::Button(
            absl::StrFormat(ICON_MD_SAVE " Save All (%zu colors)",
                            modified_count)
                .c_str(),
            ImVec2(-1, 0))) {
      auto status = gfx::PaletteManager::Get().SaveAllToRom();
      if (!status.ok()) {
        // TODO: Show error toast/notification
        ImGui::OpenPopup(
            gui::MakePopupId(gui::EditorNames::kPalette,
                             gui::PopupNames::kSaveError)
                .c_str());
      }
    }
    ImGui::EndDisabled();
 
    if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled)) {
      if (has_unsaved) {
        ImGui::SetTooltip("Save all modified colors to ROM");
      } else {
        ImGui::SetTooltip("No unsaved changes");
      }
    }
 
    // Apply to Editors button - preview changes without saving to ROM
    ImGui::BeginDisabled(!has_unsaved);
    if (ImGui::Button(ICON_MD_VISIBILITY " Apply to Editors", ImVec2(-1, 0))) {
      auto status = gfx::PaletteManager::Get().ApplyPreviewChanges();
      if (!status.ok()) {
        ImGui::OpenPopup(
            gui::MakePopupId(gui::EditorNames::kPalette,
                             gui::PopupNames::kSaveError)
                .c_str());
      }
    }
    ImGui::EndDisabled();
 
    if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled)) {
      if (has_unsaved) {
        ImGui::SetTooltip(
            "Preview palette changes in other editors without saving to ROM");
      } else {
        ImGui::SetTooltip("No changes to preview");
      }
    }
 
    ImGui::BeginDisabled(!has_unsaved);
    if (ImGui::Button(ICON_MD_UNDO " Discard All Changes", ImVec2(-1, 0))) {
      ImGui::OpenPopup(
          gui::MakePopupId(gui::EditorNames::kPalette,
                           gui::PopupNames::kConfirmDiscardAll)
              .c_str());
    }
    ImGui::EndDisabled();
 
    if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled)) {
      if (has_unsaved) {
        ImGui::SetTooltip("Discard all unsaved changes");
      } else {
        ImGui::SetTooltip("No changes to discard");
      }
    }
 
    // Confirmation popup for discard
    if (ImGui::BeginPopupModal(
            gui::MakePopupId(gui::EditorNames::kPalette,
                             gui::PopupNames::kConfirmDiscardAll)
                .c_str(),
            nullptr, ImGuiWindowFlags_AlwaysAutoResize)) {
      ImGui::Text("Discard all unsaved changes?");
      ImGui::TextColored(ImVec4(1.0f, 0.6f, 0.0f, 1.0f),
                         "This will revert %zu modified colors.",
                         modified_count);
      ImGui::Separator();
 
      if (ImGui::Button("Discard", ImVec2(120, 0))) {
        gfx::PaletteManager::Get().DiscardAllChanges();
        ImGui::CloseCurrentPopup();
      }
      ImGui::SameLine();
      if (ImGui::Button("Cancel", ImVec2(120, 0))) {
        ImGui::CloseCurrentPopup();
      }
      ImGui::EndPopup();
    }
 
    // Error popup for save failures
    if (ImGui::BeginPopupModal(
            gui::MakePopupId(gui::EditorNames::kPalette,
                             gui::PopupNames::kSaveError)
                .c_str(),
            nullptr, ImGuiWindowFlags_AlwaysAutoResize)) {
      ImGui::TextColored(ImVec4(1.0f, 0.3f, 0.3f, 1.0f),
                         "Failed to save changes");
      ImGui::Text("An error occurred while saving to ROM.");
      ImGui::Separator();
 
      if (ImGui::Button("OK", ImVec2(120, 0))) {
        ImGui::CloseCurrentPopup();
      }
      ImGui::EndPopup();
    }
 
    ImGui::Separator();
 
    // Editor Manager Menu Button
    if (ImGui::Button(ICON_MD_DASHBOARD " Panel Manager", ImVec2(-1, 0))) {
      ImGui::OpenPopup(
          gui::MakePopupId(gui::EditorNames::kPalette,
                           gui::PopupNames::kPalettePanelManager)
              .c_str());
    }
 
    if (ImGui::BeginPopup(
            gui::MakePopupId(gui::EditorNames::kPalette,
                             gui::PopupNames::kPalettePanelManager)
                .c_str())) {
      ImGui::TextColored(ImVec4(0.7f, 0.9f, 1.0f, 1.0f),
                         "%s Palette Panel Manager", ICON_MD_PALETTE);
      ImGui::Separator();
 
      // View menu section now handled by PanelManager in EditorManager
      if (!dependencies_.panel_manager)
        return;
      auto* panel_manager = dependencies_.panel_manager;
 
      ImGui::EndPopup();
    }
 
    ImGui::Separator();
 
    // Minimize button
    if (ImGui::SmallButton(ICON_MD_MINIMIZE " Minimize to Icon")) {
      control_panel_minimized_ = true;
      show_control_panel_ = false;
    }
  }
  ImGui::End();
}
 
void PaletteEditor::DrawQuickAccessPanel() {
  gui::PanelWindow card("Quick Access Palette", ICON_MD_COLOR_LENS,
                       &show_quick_access_);
  card.SetDefaultSize(340, 300);
  card.SetPosition(gui::PanelWindow::Position::Right);
 
  if (card.Begin(&show_quick_access_)) {
    // Current color picker with more options
    ImGui::BeginGroup();
    ImGui::Text("Current Color");
    gui::SnesColorEdit4("##CurrentColorPicker", &current_color_,
                        kColorPopupFlags);
 
    char buf[64];
    auto col = current_color_.rgb();
    int cr = F32_TO_INT8_SAT(col.x / 255.0f);
    int cg = F32_TO_INT8_SAT(col.y / 255.0f);
    int cb = F32_TO_INT8_SAT(col.z / 255.0f);
 
    CustomFormatString(buf, IM_ARRAYSIZE(buf), "RGB: %d, %d, %d", cr, cg, cb);
    ImGui::Text("%s", buf);
 
    CustomFormatString(buf, IM_ARRAYSIZE(buf), "SNES: $%04X",
                       current_color_.snes());
    ImGui::Text("%s", buf);
 
    if (ImGui::Button("Copy to Clipboard", ImVec2(-1, 0))) {
      SetClipboardText(buf);
    }
    ImGui::EndGroup();
 
    ImGui::Separator();
 
    // Recently used colors
    ImGui::Text("Recently Used Colors");
    if (recently_used_colors_.empty()) {
      ImGui::TextDisabled("No recently used colors yet");
    } else {
      for (int i = 0; i < recently_used_colors_.size(); i++) {
        PushID(i);
        if (i % 8 != 0)
          SameLine();
        ImVec4 displayColor =
            gui::ConvertSnesColorToImVec4(recently_used_colors_[i]);
        if (ImGui::ColorButton("##recent", displayColor, kPalButtonFlags,
                               ImVec2(28, 28))) {
          // Set as current color
          current_color_ = recently_used_colors_[i];
        }
        if (ImGui::IsItemHovered()) {
          ImGui::SetTooltip("SNES: $%04X", recently_used_colors_[i].snes());
        }
        PopID();
      }
    }
  }
  card.End();
}
 
void PaletteEditor::DrawCustomPalettePanel() {
  gui::PanelWindow card("Custom Palette", ICON_MD_BRUSH, &show_custom_palette_);
  card.SetDefaultSize(420, 200);
  card.SetPosition(gui::PanelWindow::Position::Bottom);
 
  if (card.Begin(&show_custom_palette_)) {
    ImGui::TextWrapped(
        "Create your own custom color palette for reference. "
        "Colors can be added from any palette group or created from scratch.");
 
    ImGui::Separator();
 
    // Custom palette color grid
    if (custom_palette_.empty()) {
      ImGui::TextDisabled("Your custom palette is empty.");
      ImGui::Text("Click + to add colors or drag colors from any palette.");
    } else {
      for (int i = 0; i < custom_palette_.size(); i++) {
        PushID(i);
        if (i > 0 && i % 16 != 0)
          SameLine(0.0f, 2.0f);
 
        // Enhanced color button with context menu and drag-drop support
        ImVec4 displayColor = gui::ConvertSnesColorToImVec4(custom_palette_[i]);
        bool open_color_picker =
            ImGui::ColorButton(absl::StrFormat("##customPal%d", i).c_str(),
                               displayColor, kPalButtonFlags, ImVec2(28, 28));
 
        if (open_color_picker) {
          current_color_ = custom_palette_[i];
          edit_palette_index_ = i;
          ImGui::OpenPopup(
              gui::MakePopupId(gui::EditorNames::kPalette,
                               "PanelCustomPaletteColorEdit")
                  .c_str());
        }
 
        if (BeginPopupContextItem()) {
          // Edit color directly in the popup
          SnesColor original_color = custom_palette_[i];
          if (gui::SnesColorEdit4("Edit Color", &custom_palette_[i],
                                  kColorPopupFlags)) {
            // Color was changed, add to recently used
            AddRecentlyUsedColor(custom_palette_[i]);
          }
 
          if (ImGui::Button("Delete", ImVec2(-1, 0))) {
            custom_palette_.erase(custom_palette_.begin() + i);
            ImGui::CloseCurrentPopup();
          }
          ImGui::EndPopup();
        }
 
        // Handle drag/drop for palette rearrangement
        if (BeginDragDropTarget()) {
          if (const ImGuiPayload* payload =
                  AcceptDragDropPayload(IMGUI_PAYLOAD_TYPE_COLOR_3F)) {
            ImVec4 color;
            memcpy((float*)&color, payload->Data, sizeof(float) * 3);
            color.w = 1.0f;  // Set alpha to 1.0
            custom_palette_[i] = SnesColor(color);
            AddRecentlyUsedColor(custom_palette_[i]);
          }
          EndDragDropTarget();
        }
 
        PopID();
      }
    }
 
    ImGui::Separator();
 
    // Buttons for palette management
    if (ImGui::Button(ICON_MD_ADD " Add Color")) {
      custom_palette_.push_back(SnesColor(0x7FFF));
    }
 
    ImGui::SameLine();
    if (ImGui::Button(ICON_MD_DELETE " Clear All")) {
      custom_palette_.clear();
    }
 
    ImGui::SameLine();
    if (ImGui::Button(ICON_MD_CONTENT_COPY " Export")) {
      std::string clipboard;
      for (const auto& color : custom_palette_) {
        clipboard += absl::StrFormat("$%04X,", color.snes());
      }
      if (!clipboard.empty()) {
        clipboard.pop_back();  // Remove trailing comma
      }
      SetClipboardText(clipboard.c_str());
    }
    if (ImGui::IsItemHovered()) {
      ImGui::SetTooltip("Copy palette as comma-separated SNES values");
    }
  }
  card.End();
 
  // Color picker popup for custom palette editing
  if (ImGui::BeginPopup(gui::MakePopupId(gui::EditorNames::kPalette,
                                         "PanelCustomPaletteColorEdit")
                            .c_str())) {
    if (edit_palette_index_ >= 0 &&
        edit_palette_index_ < custom_palette_.size()) {
      SnesColor original_color = custom_palette_[edit_palette_index_];
      if (gui::SnesColorEdit4(
              "Edit Color", &custom_palette_[edit_palette_index_],
              kColorPopupFlags | ImGuiColorEditFlags_PickerHueWheel)) {
        // Color was changed, add to recently used
        AddRecentlyUsedColor(custom_palette_[edit_palette_index_]);
      }
    }
    ImGui::EndPopup();
  }
}
 
void PaletteEditor::JumpToPalette(const std::string& group_name,
                                  int palette_index) {
  if (!dependencies_.panel_manager) {
    return;
  }
  auto* panel_manager = dependencies_.panel_manager;
  const size_t session_id = dependencies_.session_id;
 
  // Show and focus the appropriate card
  if (group_name == "ow_main") {
    panel_manager->ShowPanel(session_id, "palette.ow_main");
    if (ow_main_panel_) {
      ow_main_panel_->Show();
      ow_main_panel_->SetSelectedPaletteIndex(palette_index);
    }
  } else if (group_name == "ow_animated") {
    panel_manager->ShowPanel(session_id, "palette.ow_animated");
    if (ow_anim_panel_) {
      ow_anim_panel_->Show();
      ow_anim_panel_->SetSelectedPaletteIndex(palette_index);
    }
  } else if (group_name == "dungeon_main") {
    panel_manager->ShowPanel(session_id, "palette.dungeon_main");
    if (dungeon_main_panel_) {
      dungeon_main_panel_->Show();
      dungeon_main_panel_->SetSelectedPaletteIndex(palette_index);
    }
  } else if (group_name == "global_sprites") {
    panel_manager->ShowPanel(session_id, "palette.sprites");
    if (sprite_global_panel_) {
      sprite_global_panel_->Show();
      sprite_global_panel_->SetSelectedPaletteIndex(palette_index);
    }
  } else if (group_name == "sprites_aux1") {
    panel_manager->ShowPanel(session_id, "palette.sprites_aux1");
    if (sprite_aux1_panel_) {
      sprite_aux1_panel_->Show();
      sprite_aux1_panel_->SetSelectedPaletteIndex(palette_index);
    }
  } else if (group_name == "sprites_aux2") {
    panel_manager->ShowPanel(session_id, "palette.sprites_aux2");
    if (sprite_aux2_panel_) {
      sprite_aux2_panel_->Show();
      sprite_aux2_panel_->SetSelectedPaletteIndex(palette_index);
    }
  } else if (group_name == "sprites_aux3") {
    panel_manager->ShowPanel(session_id, "palette.sprites_aux3");
    if (sprite_aux3_panel_) {
      sprite_aux3_panel_->Show();
      sprite_aux3_panel_->SetSelectedPaletteIndex(palette_index);
    }
  } else if (group_name == "armors") {
    panel_manager->ShowPanel(session_id, "palette.equipment");
    if (equipment_panel_) {
      equipment_panel_->Show();
      equipment_panel_->SetSelectedPaletteIndex(palette_index);
    }
  }
 
  // Show control panel too for easy navigation
  panel_manager->ShowPanel(session_id, "palette.control_panel");
}
 
// ============================================================================
// Category and Search UI Methods
// ============================================================================
 
void PaletteEditor::DrawSearchBar() {
  ImGui::SetNextItemWidth(-1);
  if (ImGui::InputTextWithHint("##PaletteSearch",
                               ICON_MD_SEARCH " Search palettes...",
                               search_buffer_, sizeof(search_buffer_))) {
    // Search text changed - UI will update automatically
  }
}
 
bool PaletteEditor::PassesSearchFilter(const std::string& group_name) const {
  if (search_buffer_[0] == '\0') return true;
 
  // Check if group name or display name matches
  return gui::FuzzyMatch(search_buffer_, group_name) ||
         gui::FuzzyMatch(search_buffer_, GetGroupDisplayName(group_name));
}
 
bool* PaletteEditor::GetShowFlagForGroup(const std::string& group_name) {
  if (group_name == "ow_main") return &show_ow_main_panel_;
  if (group_name == "ow_animated") return &show_ow_animated_panel_;
  if (group_name == "dungeon_main") return &show_dungeon_main_panel_;
  if (group_name == "global_sprites") return &show_sprite_panel_;
  if (group_name == "sprites_aux1") return &show_sprites_aux1_panel_;
  if (group_name == "sprites_aux2") return &show_sprites_aux2_panel_;
  if (group_name == "sprites_aux3") return &show_sprites_aux3_panel_;
  if (group_name == "armors") return &show_equipment_panel_;
  return nullptr;
}
 
void PaletteEditor::DrawCategorizedPaletteList() {
  // Search bar at top
  DrawSearchBar();
  ImGui::Separator();
 
  const auto& categories = GetPaletteCategories();
 
  for (size_t cat_idx = 0; cat_idx < categories.size(); cat_idx++) {
    const auto& cat = categories[cat_idx];
 
    // Check if any items in category match search
    bool has_visible_items = false;
    for (const auto& group_name : cat.group_names) {
      if (PassesSearchFilter(group_name)) {
        has_visible_items = true;
        break;
      }
    }
 
    if (!has_visible_items) continue;
 
    ImGui::PushID(static_cast<int>(cat_idx));
 
    // Collapsible header for category with icon
    std::string header_text =
        absl::StrFormat("%s %s", cat.icon, cat.display_name);
    bool open = ImGui::CollapsingHeader(header_text.c_str(),
                                        ImGuiTreeNodeFlags_DefaultOpen);
 
    if (open) {
      ImGui::Indent(10.0f);
      for (const auto& group_name : cat.group_names) {
        if (!PassesSearchFilter(group_name)) continue;
 
        bool* show_flag = GetShowFlagForGroup(group_name);
        if (show_flag) {
          std::string label = GetGroupDisplayName(group_name);
 
          // Show modified indicator
          if (gfx::PaletteManager::Get().IsGroupModified(group_name)) {
            label += " *";
            ImGui::PushStyleColor(ImGuiCol_Text,
                                  ImVec4(1.0f, 0.6f, 0.0f, 1.0f));
          }
 
          ImGui::Checkbox(label.c_str(), show_flag);
 
          if (gfx::PaletteManager::Get().IsGroupModified(group_name)) {
            ImGui::PopStyleColor();
          }
        }
      }
      ImGui::Unindent(10.0f);
    }
    ImGui::PopID();
  }
 
  ImGui::Separator();
 
  // Utilities section
  ImGui::Text("Utilities:");
  ImGui::Indent(10.0f);
  ImGui::Checkbox("Quick Access", &show_quick_access_);
  ImGui::Checkbox("Custom Palette", &show_custom_palette_);
  ImGui::Unindent(10.0f);
}
 
}  // namespace editor
}  // namespace yaze