//
// File: interface.h
// Author: Peter Slattery
// Creation Date: 2020-01-01
//
#ifndef INTERFACE_H

enum gs_string_alignment
{
    Align_Left,
    Align_Center,
    Align_Right,
};

internal void
DrawCharacter_ (render_quad_batch_constructor* BatchConstructor, r32 MinX, r32 MinY, codepoint_bitmap CodepointInfo, v4 Color)
{
    s32 AlignedMinX = (s32)(MinX);
    s32 AlignedMinY = (s32)(MinY);
    s32 AlignedMaxX = AlignedMinX + (CodepointInfo.Width);
    s32 AlignedMaxY = AlignedMinY + (CodepointInfo.Height);
    
    PushQuad2DOnBatch(BatchConstructor,
                      v2{(r32)AlignedMinX, (r32)AlignedMinY}, v2{(r32)AlignedMaxX, (r32)AlignedMinY},
                      v2{(r32)AlignedMaxX, (r32)AlignedMaxY}, v2{(r32)AlignedMinX, (r32)AlignedMaxY},
                      CodepointInfo.UVMin, CodepointInfo.UVMax,
                      Color);
}

internal v2
DrawCharacterLeftAligned (render_quad_batch_constructor* BatchConstructor, char C, bitmap_font Font, v2 Position, v4 Color)
{
    s32 GlyphDataIndex = GetIndexForCodepoint(Font, C);
    codepoint_bitmap CodepointInfo = Font.CodepointValues[GlyphDataIndex];
    
    // NOTE(Peter):
    r32 MinX = Position.x + CodepointInfo.XOffset;
    r32 MinY = Position.y + CodepointInfo.YOffset;
    DrawCharacter_(BatchConstructor, MinX, MinY, CodepointInfo, Color);
    
    // NOTE(Peter):
    v2 PointAfterCharacter = v2{Position.x + CodepointInfo.Width, Position.y};
    return PointAfterCharacter;
}

internal v2
DrawCharacterRightAligned (render_quad_batch_constructor* BatchConstructor, char C, bitmap_font Font, v2 Position, v4 Color)
{
    s32 GlyphDataIndex = GetIndexForCodepoint(Font, C);
    codepoint_bitmap CodepointInfo = Font.CodepointValues[GlyphDataIndex];
    
    // NOTE(Peter):
    r32 MinX = Position.x - (CodepointInfo.XOffset + CodepointInfo.Width);
    r32 MinY = Position.y + CodepointInfo.YOffset + CodepointInfo.YOffset;
    DrawCharacter_(BatchConstructor, MinX, MinY, CodepointInfo, Color);
    
    // NOTE(Peter):
    v2 PointAfterCharacter = v2{Position.x-(CodepointInfo.Width + CodepointInfo.XOffset), Position.y};
    return PointAfterCharacter;
}

internal v2
DrawStringLeftAligned (render_quad_batch_constructor* BatchConstructor, s32 Length, char* gs_string, v2 InitialRegisterPosition, bitmap_font* Font, v4 Color)
{
    v2 RegisterPosition = InitialRegisterPosition;
    char* C = gs_string;
    for (s32 i = 0; i < Length; i++)
    {
        v2 PositionAfterCharacter = DrawCharacterLeftAligned(BatchConstructor, *C, *Font, RegisterPosition, Color);
        RegisterPosition.x = PositionAfterCharacter.x;
        C++;
    }
    return RegisterPosition;
}

internal v2
DrawStringRightAligned (render_quad_batch_constructor* BatchConstructor, s32 Length, char* gs_string, v2 InitialRegisterPosition, bitmap_font* Font, v4 Color)
{
    v2 RegisterPosition = InitialRegisterPosition;
    char* C = gs_string + Length - 1;
    for (s32 i = Length - 1; i >= 0; i--)
    {
        v2 PositionAfterCharacter = DrawCharacterRightAligned(BatchConstructor, *C, *Font, RegisterPosition, Color);
        RegisterPosition.x = PositionAfterCharacter.x;
        C--;
    }
    return RegisterPosition;
}

internal v2
DrawString(render_command_buffer* RenderBuffer, gs_string String, bitmap_font* Font, v2 Position, v4 Color, gs_string_alignment Alignment = Align_Left)
{
    DEBUG_TRACK_FUNCTION;
    v2 LowerRight = Position;
    
    render_quad_batch_constructor BatchConstructor = PushRenderTexture2DBatch(RenderBuffer, String.Length,
                                                                              Font->BitmapMemory,
                                                                              Font->BitmapTextureHandle,
                                                                              Font->BitmapWidth,
                                                                              Font->BitmapHeight,
                                                                              Font->BitmapBytesPerPixel,
                                                                              Font->BitmapStride);
    
    v2 RegisterPosition = Position;
    if (Alignment == Align_Left)
    {
        RegisterPosition = DrawStringLeftAligned(&BatchConstructor, StringExpand(String), RegisterPosition, Font, Color);
    }
    else if (Alignment == Align_Right)
    {
        RegisterPosition = DrawStringRightAligned(&BatchConstructor, StringExpand(String), RegisterPosition, Font, Color);
    }
    else
    {
        InvalidCodePath;
    }
    
    LowerRight.x = RegisterPosition.x;
    
    return LowerRight;
}

internal void
DrawCursor (render_quad_batch_constructor* BatchConstructor, v2 Position, v4 Color, bitmap_font Font)
{
    v2 Min = Position;
    v2 Max = Position + v2{(r32)Font.MaxCharWidth, (r32)(Font.Ascent + Font.Descent)};
    PushQuad2DOnBatch(BatchConstructor, Min, Max, Color);
}

internal v2
Drawgs_stringWithCursor (render_command_buffer* RenderBuffer, gs_string String, s32 CursorPosition, bitmap_font* Font, v2 Position, v4 Color, v4 CursorColor, gs_string_alignment Alignment = Align_Left)
{
    DEBUG_TRACK_FUNCTION;
    v2 LowerRight = Position;
    
    // NOTE(Peter): We push this on first so that the cursor will be drawn underneath any character it may overlap with
    render_quad_batch_constructor CursorBatch = PushRenderQuad2DBatch(RenderBuffer, 1);
    render_quad_batch_constructor BatchConstructor = PushRenderTexture2DBatch(RenderBuffer, String.Length,
                                                                              Font->BitmapMemory,
                                                                              Font->BitmapTextureHandle,
                                                                              Font->BitmapWidth,
                                                                              Font->BitmapHeight,
                                                                              Font->BitmapBytesPerPixel,
                                                                              Font->BitmapStride);
    
    v2 RegisterPosition = Position;
    if (Alignment == Align_Left)
    {
        RegisterPosition = DrawStringLeftAligned(&BatchConstructor, StringExpand(String), RegisterPosition, Font, Color);
        DrawCursor(&CursorBatch, RegisterPosition, GreenV4, *Font);
        if (String.Length - CursorPosition > 0)
        {
            RegisterPosition = DrawStringLeftAligned(&BatchConstructor,
                                                     String.Length - CursorPosition,
                                                     String.Str + CursorPosition,
                                                     RegisterPosition, Font, Color);
        }
    }
    else if (Alignment == Align_Right)
    {
        RegisterPosition = DrawStringRightAligned(&BatchConstructor,
                                                  CursorPosition, String.Str,
                                                  RegisterPosition, Font, Color);
        DrawCursor(&CursorBatch, RegisterPosition, GreenV4, *Font);
        if (String.Length - CursorPosition > 0)
        {
            RegisterPosition = DrawStringRightAligned(&BatchConstructor,
                                                      String.Length - CursorPosition,
                                                      String.Str + CursorPosition,
                                                      RegisterPosition, Font, Color);
        }
    }
    else
    {
        InvalidCodePath;
    }
    
    LowerRight.x = RegisterPosition.x;
    return LowerRight;
}

struct interface_config
{
    v4 PanelBGColors[4];
    
    v4 ButtonColor_Inactive, ButtonColor_Active, ButtonColor_Selected;
    
    v4 TextColor;
    
#define LIST_BG_COLORS_COUNT 2
    v4 ListBGColors[LIST_BG_COLORS_COUNT];
    v4 ListBGHover;
    v4 ListBGSelected;
    
    bitmap_font* Font;
    r32 FontSize;
    v2 Margin;
    r32 RowHeight;
};

struct ui_layout
{
    rect2 Bounds;
    v2 Margin;
    r32 RowHeight;
    r32 RowYAt;
    
    b32 DrawHorizontal;
    u32 ColumnsMax;
    r32* ColumnWidths;
    u32 ColumnsCount;
};

struct ui_interface
{
    interface_config Style;
    mouse_state Mouse;
    render_command_buffer* RenderBuffer;
};

static ui_layout
ui_CreateLayout(ui_interface Interface, rect2 Bounds)
{
    ui_layout Result = {0};
    Result.Bounds = Bounds;
    Result.Margin = Interface.Style.Margin;
    Result.RowHeight = Interface.Style.RowHeight;
    Result.RowYAt = Bounds.Max.y - Result.RowHeight;
    return Result;
}

static void
ui_StartRow(ui_layout* Layout, u32 ColumnsMax)
{
    Layout->DrawHorizontal = true;
    Layout->ColumnsMax = ColumnsMax;
    Layout->ColumnWidths = 0;
    Layout->ColumnsCount = 0;
}

static void
ui_StartRow(ui_layout* Layout)
{
    ui_StartRow(Layout, 0);
}

static void
ui_StartRow(ui_layout* Layout, u32 ColumnsMax, r32* ColumnWidths)
{
    Layout->DrawHorizontal = true;
    Layout->ColumnsMax = ColumnsMax;
    Layout->ColumnWidths = ColumnWidths;
    Layout->ColumnsCount = 0;
}

static void
ui_EndRow(ui_layout* Layout)
{
    Layout->DrawHorizontal = false;
    Layout->ColumnWidths = 0;
    Layout->RowYAt -= Layout->RowHeight;
}

static b32
ui_TryReserveElementBounds(ui_layout* Layout, rect2* Bounds)
{
    b32 Result = true;
    if (!Layout->DrawHorizontal)
    {
        Bounds->Min = { Layout->Bounds.Min.x, Layout->RowYAt };
        Bounds->Max = { Layout->Bounds.Max.x, Bounds->Min.y + Layout->RowHeight };
        Layout->RowYAt -= Layout->RowHeight;
    }
    else
    {
        if (Layout->ColumnsMax > 0)
        {
            Assert(Layout->ColumnsCount < Layout->ColumnsMax);
            if (Layout->ColumnWidths != 0)
            {
                v2 Min = { Layout->Bounds.Min.x, Layout->RowYAt };
                for (u32 i = 0; i < Layout->ColumnsCount; i++)
                {
                    Min.x += Layout->ColumnWidths[i];
                }
                Bounds->Min = Min;
                Bounds->Max = Bounds->Min + v2{ Layout->ColumnWidths[Layout->ColumnsCount], Layout->RowHeight };
            }
            else
            {
                r32 ElementWidth = Rect2Width(Layout->Bounds) / Layout->ColumnsMax;
                Bounds->Min = {
                    Layout->Bounds.Min.x + (ElementWidth * Layout->ColumnsCount) + Layout->Margin.x,
                    Layout->RowYAt
                };
                Bounds->Max = {
                    Bounds->Min.x + ElementWidth - Layout->Margin.x,
                    Bounds->Min.y + Layout->RowHeight
                };
            }
            Layout->ColumnsCount++;
        }
        else
        {
            Result = false;
        }
    }
    return Result;
}

static rect2
ui_ReserveTextLineBounds(ui_interface Interface, gs_string Text, ui_layout* Layout)
{
    rect2 Bounds = {0};
    
    return Bounds;
}

static rect2
ui_ReserveElementBounds(ui_layout* Layout)
{
    rect2 Bounds = {0};
    if (!ui_TryReserveElementBounds(Layout, &Bounds))
    {
        InvalidCodePath;
    }
    return Bounds;
}

static rect2
ui_LayoutRemaining(ui_layout Layout)
{
    rect2 Result = Layout.Bounds;
    Result.Max.y = Layout.RowYAt;
    if (Layout.DrawHorizontal)
    {
        Result.Max.y -= Layout.RowHeight;
    }
    return Result;
}

//
// Interaction
//

internal b32
ui_MouseClickedRect(ui_interface Interface, rect2 Rect)
{
    b32 Result = MouseButtonTransitionedDown(Interface.Mouse.LeftButtonState);
    Result &= PointIsInRect(Rect, Interface.Mouse.Pos);
    return Result;
}

//
// Drawing Functions
//

static r32
ui_GetTextLineHeight(ui_interface Interface)
{
    r32 Result = Interface.Style.Font->PixelHeight + (2 * Interface.Style.Margin.y);
    return Result;
}

static void
ui_FillRect(ui_interface* Interface, rect2 Bounds, v4 Color)
{
    PushRenderQuad2D(Interface->RenderBuffer, Bounds.Min, Bounds.Max, Color);
}

static void
ui_OutlineRect(ui_interface* Interface, rect2 Bounds, r32 Thickness, v4 Color)
{
    PushRenderBoundingBox2D(Interface->RenderBuffer, Bounds.Min, Bounds.Max, Thickness, Color);
}

internal void
ui_DrawString(ui_interface* Interface, gs_string String, rect2 Bounds, v4 Color, gs_string_alignment Alignment = Align_Left)
{
    DEBUG_TRACK_FUNCTION;
    render_quad_batch_constructor BatchConstructor = PushRenderTexture2DBatch(Interface->RenderBuffer,
                                                                              String.Length,
                                                                              Interface->Style.Font->BitmapMemory,
                                                                              Interface->Style.Font->BitmapTextureHandle,
                                                                              Interface->Style.Font->BitmapWidth,
                                                                              Interface->Style.Font->BitmapHeight,
                                                                              Interface->Style.Font->BitmapBytesPerPixel,
                                                                              Interface->Style.Font->BitmapStride);
    
    v2 RegisterPosition = Bounds.Min + Interface->Style.Margin;
    if (Alignment == Align_Left)
    {
        RegisterPosition = DrawStringLeftAligned(&BatchConstructor, StringExpand(String), RegisterPosition, Interface->Style.Font, Color);
    }
    else if (Alignment == Align_Right)
    {
        RegisterPosition = DrawStringRightAligned(&BatchConstructor, StringExpand(String), RegisterPosition, Interface->Style.Font, Color);
    }
    else
    {
        InvalidCodePath;
    }
}

static void
ui_LayoutDrawString(ui_interface* Interface, ui_layout* Layout, gs_string String, v4 Color, gs_string_alignment Alignment = Align_Left)
{
    rect2 Bounds = {0};
    if (!ui_TryReserveElementBounds(Layout, &Bounds))
    {
        // TODO(NAME): Not invalid, just haven't implemented yet.
        // This is the case where Layout is in row mode without a fixed number of elements
        InvalidCodePath;
    }
    ui_DrawString(Interface, String, Bounds, Color, Alignment);
}

static void
ui_TextBox(ui_interface* Interface, rect2 Bounds, gs_string Text, v4 BGColor, v4 TextColor)
{
    ui_FillRect(Interface, Bounds, BGColor);
    ui_DrawString(Interface, Text, Bounds, TextColor);
}

static b32
ui_Button(ui_interface* Interface, gs_string Text, rect2 Bounds, v4 InactiveColor, v4 HoverColor, v4 ClickedColor)
{
    b32 Pressed = false;
    v4 ButtonBG = InactiveColor;
    if (PointIsInRect(Bounds, Interface->Mouse.Pos))
    {
        ButtonBG = HoverColor;
        if (MouseButtonTransitionedDown(Interface->Mouse.LeftButtonState))
        {
            ButtonBG = ClickedColor;
            Pressed = true;
        }
    }
    ui_TextBox(Interface, Bounds, Text, ButtonBG, Interface->Style.TextColor);
    return Pressed;
}

static b32
ui_Button(ui_interface* Interface, gs_string Text, rect2 Bounds)
{
    v4 BGColor = Interface->Style.ButtonColor_Inactive;
    v4 HoverColor = Interface->Style.ButtonColor_Active;
    v4 SelectedColor = Interface->Style.ButtonColor_Selected;
    return ui_Button(Interface, Text, Bounds, BGColor, HoverColor, SelectedColor);
}

struct list_item_colors
{
    v4 Hover;
    v4 Selected;
    v4 BGColor;
};

inline v4
ui_GetListItemBGColor(interface_config Style, u32 ElementIndex)
{
    v4 Result = Style.ListBGColors[ElementIndex % LIST_BG_COLORS_COUNT];
    return Result;
}

static list_item_colors
ui_GetListItemColors(ui_interface* Interface, u32 ListItemIndex)
{
    list_item_colors Result = {};
    Result.Hover = Interface->Style.ListBGHover;
    Result.Selected = Interface->Style.ListBGSelected;
    Result.BGColor = ui_GetListItemBGColor(Interface->Style, ListItemIndex);
    return Result;
}

static b32
ui_ListButton(ui_interface* Interface, gs_string Text, rect2 Bounds, u32 ListItemIndex)
{
    list_item_colors Colors = ui_GetListItemColors(Interface, ListItemIndex);
    return ui_Button(Interface, Text, Bounds, Colors.Hover, Colors.Selected, Colors.BGColor);
}

static b32
ui_LayoutButton(ui_interface* Interface, ui_layout* Layout, gs_string Text, v4 BGColor, v4 HoverColor, v4 SelectColor)
{
    rect2 ButtonBounds = {0};
    if (!ui_TryReserveElementBounds(Layout, &ButtonBounds))
    {
        ButtonBounds = ui_ReserveTextLineBounds(*Interface, Text, Layout);
    }
    return ui_Button(Interface, Text, ButtonBounds, BGColor, HoverColor, SelectColor);
}

static b32
ui_LayoutButton(ui_interface* Interface, ui_layout* Layout, gs_string Text)
{
    v4 BGColor = Interface->Style.ButtonColor_Inactive;
    v4 HoverColor = Interface->Style.ButtonColor_Active;
    v4 SelectedColor = Interface->Style.ButtonColor_Selected;
    return ui_LayoutButton(Interface, Layout, Text, BGColor, HoverColor, SelectedColor);
}

static b32
ui_LayoutListButton(ui_interface* Interface, ui_layout* Layout, gs_string Text, u32 ListItemIndex)
{
    list_item_colors Colors = ui_GetListItemColors(Interface, ListItemIndex);
    return ui_LayoutButton(Interface, Layout, Text, Colors.Hover, Colors.Selected, Colors.BGColor);
}

static b32
ui_LayoutListEntry(ui_interface* Interface, ui_layout* Layout, gs_string Text, u32 Index)
{
    rect2 Bounds = {0};
    if (!ui_TryReserveElementBounds(Layout, &Bounds))
    {
        // TODO(Peter): this isn't really invalid, but I don't have a concrete use case
        // for it yet. This should only fire if the Layout component is drawing a row,
        // but if you're in row mode during a list, what should happen?
        // Punting this till I have a use case
        InvalidCodePath;
    }
    v4 BGColor = ui_GetListItemBGColor(Interface->Style, Index);
    v4 HoverColor = Interface->Style.ListBGHover;
    v4 SelectedColor = Interface->Style.ListBGSelected;
    return ui_Button(Interface, Text, Bounds, BGColor, HoverColor, SelectedColor);
}

//
// OLD
//

enum selection_state
{
    Selection_None,
    Selection_Selected,
    Selection_Deselected,
};

struct interface_list
{
    rect2 ListBounds;
    
    v2 ListElementDimensions;
    v2 ElementLabelIndent;
    
    v4 TextColor;
    v4* LineBGColors;
    s32 LineBGColorsCount;
    v4 LineBGHoverColor;
    
    s32 ListElementsCount;
};

internal rect2
DrawListElementBackground(interface_list* List, mouse_state Mouse, render_command_buffer* RenderBuffer)
{
    rect2 LineBounds = {};
    LineBounds.Min = v2{
        List->ListBounds.Min.x,
        List->ListBounds.Max.y - (List->ListElementDimensions.y * (List->ListElementsCount + 1))
    };
    LineBounds.Max = LineBounds.Min + List->ListElementDimensions;
    
    v4 Color = List->LineBGColors[List->ListElementsCount % List->LineBGColorsCount];
    if (PointIsInRect(LineBounds, Mouse.Pos))
    {
        Color = List->LineBGHoverColor;
    }
    
    PushRenderQuad2D(RenderBuffer, LineBounds.Min, LineBounds.Max, Color);
    return LineBounds;
}

internal rect2
DrawListElement(gs_string Label, interface_list* List, mouse_state Mouse, render_command_buffer* RenderBuffer, interface_config Interface)
{
    rect2 Bounds = DrawListElementBackground(List, Mouse, RenderBuffer);
    
    v2 LabelPosition = Bounds.Min + List->ElementLabelIndent;
    DrawString(RenderBuffer, Label, Interface.Font, LabelPosition, List->TextColor);
    
    List->ListElementsCount++;
    return Bounds;
}


internal r32
EvaluateColorChannelSlider (render_command_buffer* RenderBuffer, v4 ChannelMask, v2 Min, v2 Max, r32 Current, mouse_state Mouse)
{
    r32 Result = Current;
    
    // TODO(Peter): Can this come from outside the function? Would rather pass rect around than min/max
    rect2 Rect = rect2{ Min, Max };
    
    render_quad_batch_constructor Batch = PushRenderQuad2DBatch(RenderBuffer, 2);
    
    v4 LeftColor = ChannelMask * 0;
    LeftColor.a = 1.f;
    v4 RightColor = ChannelMask;
    PushQuad2DOnBatch(&Batch,
                      RectBottomLeft(Rect), RectBottomRight(Rect),
                      RectTopRight(Rect), RectTopLeft(Rect),
                      v2{0, 0}, v2{1, 0}, v2{1, 1}, v2{0, 1},
                      LeftColor, RightColor, RightColor, LeftColor);
    
    if (MouseButtonTransitionedDown(Mouse.LeftButtonState))
    {
        if (PointIsInRect(Rect, Mouse.DownPos))
        {
            Result = ((r32)Mouse.Pos.x - Min.x) / (Max.x - Min.x);
            Result = Clamp01(Result);
        }
    }
    
    r32 DragBarWidth = 8;
    v2 DragBarMin = v2{
        LerpR32(Result, Min.x, Max.x) - (DragBarWidth / 2),
        Min.y - 2
    };
    v2 DragBarMax = DragBarMin + v2{DragBarWidth, (Max.y - Min.y) + 4};
    
    PushQuad2DOnBatch(&Batch, DragBarMin, DragBarMax, v4{.3f, .3f, .3f, 1.f});
    
    return Result;
}

internal b32
EvaluateColorPicker (render_command_buffer* RenderBuffer, v4* Value, v2 PanelMin, interface_config Config, mouse_state Mouse)
{
    b32 ShouldClose = false;
    
    v2 PanelMax = v2{400, 500};
    // TODO(Peter): Can this get passed from outside? rather pass rect2 than min/max pairs
    rect2 PanelRect = rect2{PanelMin, PanelMax};
    if (MouseButtonTransitionedDown(Mouse.LeftButtonState) && !PointIsInRect(PanelRect, Mouse.Pos))
    {
        ShouldClose = true;
    }
    else
    {
        PushRenderQuad2D(RenderBuffer, PanelRect.Min, PanelRect.Max, v4{.5f, .5f, .5f, 1.f});
        
        v2 TitleMin = v2{PanelRect.Min.x + 5, PanelRect.Max.y - (Config.Font->PixelHeight + 5)};
        DrawString(RenderBuffer, MakeString("Color Picker"), Config.Font,
                   TitleMin, WhiteV4);
        
        v2 SliderDim = v2{(PanelMax.x - PanelMin.x) - 20, 32};
        // channel sliders
        v2 SliderMin = TitleMin - v2{0, SliderDim.y + 10};
        Value->r = EvaluateColorChannelSlider(RenderBuffer, RedV4, SliderMin, SliderMin + SliderDim, Value->r, Mouse);
        SliderMin.y -= SliderDim.y + 10;
        Value->g = EvaluateColorChannelSlider(RenderBuffer, GreenV4, SliderMin, SliderMin + SliderDim, Value->g, Mouse);
        SliderMin.y -= SliderDim.y + 10;
        Value->b = EvaluateColorChannelSlider(RenderBuffer, BlueV4, SliderMin, SliderMin + SliderDim, Value->b, Mouse);
        SliderMin.y -= SliderDim.y + 10;
        Value->a = EvaluateColorChannelSlider(RenderBuffer, WhiteV4, SliderMin, SliderMin + SliderDim, Value->a, Mouse);
        
        // Output Color Display
        SliderMin.y -= 100;
        PushRenderQuad2D(RenderBuffer, SliderMin, SliderMin + v2{75, 75}, *Value);
    }
    
    return ShouldClose;
}

struct search_lister_result
{
    s32 HotItem;
    s32 SelectedItem;
    b32 ShouldRemainOpen;
};

typedef gs_string search_lister_get_list_item_at_offset(u8* ListMemory, s32 ListLength, gs_string Searchgs_string, s32 Offset);

internal search_lister_result
EvaluateSearchLister (ui_interface* Interface, v2 TopLeft, v2 Dimension, gs_string Title,
                      gs_string* ItemList, s32* ListLUT, s32 ListLength,
                      s32 HotItem,
                      gs_string* Searchgs_string, s32 Searchgs_stringCursorPosition)
{
    search_lister_result Result = {};
    Result.ShouldRemainOpen = true;
    Result.HotItem = HotItem;
    
    // TODO(Peter): Was tired. Nothing wrong with the code below
    InvalidCodePath;
#if 0
    // Title Bar
    rect2 TitleBarBounds = rect2{v2{TopLeft.x, TopLeft.y - 30}, v2{TopLeft.x + 300, TopLeft.y}};
    ui_FillRect(Interface, TitleBarBounds, v4{.3f, .3f, .3f, 1.f});
    ui_Drawgs_string(Interface, Title, TitleBarBounds, Interface->Style.TextColor);
    
    MakeStringBuffer(Debuggs_string, 256);
    PrintF(&Debuggs_string, "Hot Item: %d  |  Filtered Items: %d", HotItem, ListLength);
    rect2 DebugBounds = MakeRectMinWidth(v2{ TopLeft.x + 256, TopLeft.y - 25}, v2{256, Interface->Style.LineHeight});
    ui_Drawgs_string(Interface, Debuggs_string, DebugBounds, Interface->Style.TextColor);
    
    // Search Bar
    PushRenderQuad2D(RenderBuffer, v2{TopLeft.x, TopLeft.y - 30}, v2{TopLeft.x + 300, TopLeft.y}, v4{.3f, .3f, .3f, 1.f});
    Drawgs_stringWithCursor(RenderBuffer, *Searchgs_string, Searchgs_stringCursorPosition, Font, v2{TopLeft.x, TopLeft.y - 25}, WhiteV4, GreenV4);
    TopLeft.y -= 30;
    
    for (s32 i = 0; i < ListLength; i++)
    {
        s32 FilteredIndex = ListLUT[i];
        gs_string ListItemgs_string = ItemList[FilteredIndex];
        
        v2 Min = v2{TopLeft.x, TopLeft.y - 30};
        v2 Max = Min + Dimension - v2{0, Config.Margin.y};
        
        v4 ButtonColor = Config.ButtonColor_Inactive;
        if (i == HotItem)
        {
            ButtonColor = Config.ButtonColor_Active;
        }
        
        if (ui_Button(Interface, ListItemgs_string, rect2{Min, Max}))
        {
            Result.SelectedItem = i;
        }
        
        TopLeft.y -= 30;
    }
#endif
    
    return Result;
}

#define INTERFACE_H
#endif // INTERFACE_H