using System;
using System.Collections.Generic;
using UnityEngine;

public class KGFGUIRenderer : KGFObject, KGFIValidator
{
	private List<KGFIGui2D> itsGUIs = new List<KGFIGui2D>();

	protected override void KGFAwake()
	{
		itsGUIs = KGFAccessor.GetObjects<KGFIGui2D>();
		KGFAccessor.RegisterAddEvent<KGFIGui2D>(OnRegisterKGFIGui2D);
		KGFAccessor.RegisterRemoveEvent<KGFIGui2D>(OnUnregisterKGFIGui2D);
	}

	private void OnRegisterKGFIGui2D(object theSender, EventArgs theArgs)
	{
		KGFAccessor.KGFAccessorEventargs kGFAccessorEventargs = theArgs as KGFAccessor.KGFAccessorEventargs;
		if (kGFAccessorEventargs != null)
		{
			KGFIGui2D kGFIGui2D = kGFAccessorEventargs.GetObject() as KGFIGui2D;
			if (kGFIGui2D != null)
			{
				itsGUIs.Add(kGFIGui2D);
				itsGUIs.Sort(CompareKGFIGui2D);
			}
		}
	}

	private void OnUnregisterKGFIGui2D(object theSender, EventArgs theArgs)
	{
		KGFAccessor.KGFAccessorEventargs kGFAccessorEventargs = theArgs as KGFAccessor.KGFAccessorEventargs;
		if (kGFAccessorEventargs != null)
		{
			KGFIGui2D kGFIGui2D = kGFAccessorEventargs.GetObject() as KGFIGui2D;
			if (kGFIGui2D != null && itsGUIs.Contains(kGFIGui2D))
			{
				itsGUIs.Remove(kGFIGui2D);
			}
		}
	}

	private int CompareKGFIGui2D(KGFIGui2D theGui1, KGFIGui2D theGui2)
	{
		return theGui1.GetLayer().CompareTo(theGui2.GetLayer());
	}

	protected void OnGUI()
	{
		float scaleFactor2D = KGFScreen.GetScaleFactor2D();
		GUIUtility.ScaleAroundPivot(new Vector2(scaleFactor2D, scaleFactor2D), Vector2.zero);
		foreach (KGFIGui2D itsGUI in itsGUIs)
		{
			itsGUI.RenderGUI();
		}
		GUI.matrix = Matrix4x4.identity;
	}

	public virtual KGFMessageList Validate()
	{
		return new KGFMessageList();
	}
}