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

#if UNITY_EDITOR
using UnityEditor.Experimental.GraphView;
#endif

using System.Runtime.CompilerServices;

using Xorti = XericLibrary.Runtime.MacroLibrary.MacroMath;

using UnityEngine;

namespace XericLibrary.Runtime.MacroLibrary
{
    public static class MacroEvent
    {
		#region 控制器

		/// <summary>
		/// 保守事件控制器
		/// </summary>
		class ConservativeManager
		{
			#region 字段属性

			/// <summary>
			/// 事件索引器
			/// </summary>
			private Dictionary<int, int> EventIndex;

			/// <summary>
			/// 事件状态寄存器
			/// </summary>
			private List<int> eventRegister;

			#endregion

			#region 方法

			public ConservativeManager()
			{
				EventIndex = new Dictionary<int, int>();
				eventRegister = new List<int>();
			}

			/// <summary>
			/// 保守地利用控制器调用一个事件分发器
			/// </summary>
			public void InvokeConservative(Delegate targetevent)
			{
				var code = targetevent.GetHashCode();
				int index = 0;
				if(!EventIndex.TryGetValue(code, out index))
					EventIndex.Add(code, EventIndex.Count);
				targetevent.DynamicInvoke();// dynmic代表动态类型，包含装箱拆箱，速度会非常慢
			}

			#endregion
		}

		#endregion

		#region 事件

		/// <summary>
		/// 保守地调用一个事件分发器
		/// </summary>
		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static bool InvokeConservative(this Action invokedEvent, int sign, ref int register)
		{
			if(Xorti.GetByteState(register, sign))
				return false;
			Xorti.SetByteState(ref register, sign, true);
			invokedEvent?.Invoke();
			Xorti.SetByteState(ref register, sign, false);
			return true;
		}

		/// <summary>
		/// 保守地调用一个事件分发器
		/// </summary>
		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static bool InvokeConservative<PARAM>(this Action<PARAM> invokedEvent, PARAM input, int sign, ref int register)
		{
			if(Xorti.GetByteState(register, sign))
				return false;
			Xorti.SetByteState(ref register, sign, true);
			invokedEvent?.Invoke(input);
			Xorti.SetByteState(ref register, sign, false);
			return true;
		}

		#endregion
	}
}