using System;
using System.Numerics;
using Dalamud.Bindings.ImGui;
using Dalamud.Interface;
using Dalamud.Interface.Utility;
using Dalamud.Interface.Utility.Raii;

namespace Questionable.Windows;

internal static class SidebarNav
{
	public readonly record struct Item(FontAwesomeIcon Icon, string Label);

	public readonly record struct Group(string Label, Item[] Items);

	private const float RowMargin = 4f;

	private const float IconInset = 6f;

	private const float IconLabelGap = 22f;

	private const float RowRounding = 4f;

	public static int Draw(Group[] groups, int selected, float width = 168f)
	{
		int result = selected;
		using (ImRaii.Child("##qstSidebar", new Vector2(width * ImGuiHelpers.GlobalScale, 0f), border: false))
		{
			using (ImRaii.PushId("QstSidebar"))
			{
				ImDrawListPtr windowDrawList = ImGui.GetWindowDrawList();
				float frameHeight = ImGui.GetFrameHeight();
				float fontSize = ImGui.GetFontSize();
				float globalScale = ImGuiHelpers.GlobalScale;
				float num = 4f * globalScale;
				int num2 = 0;
				bool flag = true;
				for (int i = 0; i < groups.Length; i++)
				{
					Group obj = groups[i];
					ImGui.SetCursorPosY(ImGui.GetCursorPosY() + (flag ? 2f : 10f));
					flag = false;
					ImGui.SetCursorPosX(ImGui.GetCursorPosX() + num);
					ImGui.TextColored(in UiThemeUtils.MutedTextColor, obj.Label.ToUpperInvariant());
					Item[] items = obj.Items;
					for (int j = 0; j < items.Length; j++)
					{
						Item item = items[j];
						bool flag2 = num2 == selected;
						ImGui.SetCursorPosX(ImGui.GetCursorPosX() + num);
						using (ImRaii.ColorDisposable colorDisposable = ImRaii.PushColor(ImGuiCol.Header, Vector4.Zero))
						{
							colorDisposable.Push(ImGuiCol.HeaderHovered, Vector4.Zero);
							colorDisposable.Push(ImGuiCol.HeaderActive, Vector4.Zero);
							ImU8String label = new ImU8String(6, 1);
							label.AppendLiteral("##item");
							label.AppendFormatted(num2);
							if (ImGui.Selectable(label, flag2, ImGuiSelectableFlags.None, new Vector2(ImGui.GetContentRegionAvail().X - num, frameHeight)))
							{
								result = num2;
							}
						}
						bool flag3 = ImGui.IsItemHovered();
						Vector2 itemRectMin = ImGui.GetItemRectMin();
						Vector2 itemRectMax = ImGui.GetItemRectMax();
						float x = ImGui.GetStyle().ItemSpacing.X;
						float num3 = MathF.Truncate(x * 0.5f);
						itemRectMin.X += num3;
						itemRectMax.X -= x - num3;
						if (flag2)
						{
							windowDrawList.AddRectFilled(itemRectMin, itemRectMax, ImGui.ColorConvertFloat4ToU32(UiThemeUtils.AccentDimColor), 4f);
						}
						else if (flag3)
						{
							windowDrawList.AddRectFilled(itemRectMin, itemRectMax, ImGui.ColorConvertFloat4ToU32(UiThemeUtils.SubtleHoverColor), 4f);
						}
						uint col = ImGui.ColorConvertFloat4ToU32(flag2 ? UiThemeUtils.AccentColor : UiThemeUtils.DimTextColor);
						string text = item.Icon.ToIconString();
						windowDrawList.AddText(UiBuilder.IconFont, fontSize, new Vector2(itemRectMin.X + 6f * globalScale, itemRectMin.Y + (frameHeight - fontSize) / 2f), col, text);
						Vector2 vector = ImGui.CalcTextSize(item.Label);
						windowDrawList.AddText(new Vector2(itemRectMin.X + 28f * globalScale, itemRectMin.Y + (frameHeight - vector.Y) / 2f), col, item.Label);
						if (flag2)
						{
							windowDrawList.AddRect(itemRectMin, itemRectMax, ImGui.ColorConvertFloat4ToU32(UiThemeUtils.CardBorderColor), 4f, ImDrawFlags.None, 1f);
						}
						num2++;
					}
				}
				Vector2 windowPos = ImGui.GetWindowPos();
				Vector2 windowSize = ImGui.GetWindowSize();
				windowDrawList.AddLine(new Vector2(windowPos.X + windowSize.X, windowPos.Y), new Vector2(windowPos.X + windowSize.X, windowPos.Y + windowSize.Y), ImGui.ColorConvertFloat4ToU32(UiThemeUtils.CardBorderColor), 1f);
			}
		}
		ImGui.SameLine();
		return result;
	}
}