using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Project
{
	public class CInterLock
	{
		UInt64 offsetValue = 0x01;
		public object Tag { get; set; }
		public string errorMessage;
		protected UInt64 _value;

		public UInt64 Value { get { return _value; } set { _value = value; } }

		public event EventHandler<ValueEventArgs> ValueChanged;
		public class ValueEventArgs : EventArgs
		{
			private int _arridx;
			private Boolean _oldvalue;
			private Boolean _newvalue;
			private string _reason;

			public int ArrIDX { get { return _arridx; } }
			public Boolean OldValue { get { return _oldvalue; } }
			public Boolean NewValue { get { return _newvalue; } }
			public string Reason { get { return _reason; } }
			public Boolean NewOn { get; set; }
			public Boolean NewOff { get; set; }

			public ValueEventArgs(int arridx, Boolean oldvalue, Boolean newvalue, string reason_, Boolean newon_, Boolean newof_)
			{
				_arridx = arridx;
				_oldvalue = oldvalue;
				_newvalue = newvalue;
				_reason = reason_;
				this.NewOn = newon_;
				this.NewOff = newon_;
			}
		}

		public CInterLock(object tag = null)
		{
			errorMessage = string.Empty;
			_value = 0;
			this.Tag = tag;
		}

		public Boolean get(int idx)
		{
			if (idx >= 64)
				throw new Exception("flag는 최대 64개를 지원 합니다");

			var offset = (UInt64)(offsetValue << idx);
			return (_value & offset) != 0;
		}
		public void set(int idx, Boolean value, string reason)
		{
			if (idx >= 64)
				throw new Exception("flag는 최대 64개를 지원 합니다");

			var oldvalue = get(idx);
			var raw_old = _value;
			if (value)
			{
				var offset = (UInt64)(offsetValue << idx);
				_value = _value | offset;
			}
			else
			{
				var shiftvalue = (UInt64)(offsetValue << idx);
				UInt64 offset = ~shiftvalue;
				_value = _value & offset;
			}

			if (oldvalue != value)
			{
				Boolean NewOn = (raw_old == 0 && _value > 0);
				Boolean NewOf = (raw_old != 0 && _value == 0);
				if (ValueChanged != null)
					ValueChanged(this, new ValueEventArgs(idx, oldvalue, value, reason, NewOn, NewOf));
			}
			else
			{
				//Pub.log.Add(" >> SKIP");
				//if (string.IsNullOrEmpty(reason) == false)
				//Pub.log.Add("#### FLAG변경(값이 같아서 처리 안함) : idx=" + idx.ToString() + ",값:" + value.ToString() + ",사유:" + reason);
			}
		}
		public void Toggle(int idx, string reason = "")
		{
			var curValue = get(idx);
			set(idx, !curValue, reason);
		}

	}
}