using System.Numerics;
using ImGuiNET;
using ImGuiInternal = ImGuiNET.Internal.ImGui;

namespace gaemstone.Client.Utility;

public static class ImGuiUtility
{
	public static bool UIButtonToggle(int index, string label, string tooltip, ref bool enabled)
		{ if (UIButton(index, label, tooltip, enabled)) enabled = !enabled; return enabled; }
	public static bool UIButton(int index, string label, string tooltip, bool active)
	{
		var start = new Vector2(4, 4);
		var buttonSize = new Vector2(32, 32);
		var pos = start + new Vector2(buttonSize.X + 4, 0) * index;

		ImGui.SetNextWindowPos(pos, ImGuiCond.Always);
		ImGui.PushStyleVar(ImGuiStyleVar.WindowPadding, Vector2.Zero);
		ImGui.Begin("UIToggle" + index,
			ImGuiWindowFlags.NoTitleBar | ImGuiWindowFlags.NoBackground |
			ImGuiWindowFlags.NoMove | ImGuiWindowFlags.NoResize |
			ImGuiWindowFlags.NoBringToFrontOnFocus | ImGuiWindowFlags.NoDocking);
		ImGui.PopStyleVar();

		if (!active) ImGui.PushStyleVar(ImGuiStyleVar.Alpha, 0.6f);
		var clicked = ImGui.Button(label, buttonSize);
		if (!active) ImGui.PopStyleVar();
		if (ImGui.IsItemHovered()) ImGui.SetTooltip(tooltip);

		ImGui.End();
		return clicked;
	}

	// public static void AdvancedTooltip(string brief, string detail)
	// {
	// 	if (!ImGui.IsItemHovered()) return;
	// 	ImGui.BeginTooltip();
	// 		ImGui.PushFont(ImGui.GetIO().Fonts.Fonts[1]);
	// 			ImGui.TextUnformatted(brief);
	// 		ImGui.PopFont();
	// 		ImGui.Text(detail);
	// 	ImGui.EndTooltip();
	// }

	public static void TextCentered(string text, Vector2 size)
	{
		var pos = ImGui.GetCursorScreenPos();
		ImGuiInternal.ItemSize(size, 0);
		if (!ImGuiInternal.ItemAdd(new() { Min = pos, Max = pos + size }, 0)) return;

		var textSize = ImGui.CalcTextSize(text);
		var textPos  = pos + (size - textSize) / 2;
		ImGuiInternal.RenderText(textPos, text);
	}
}