namespace TBF.BenchControl.Modbus.TankSelector
{
	public class UnselectTankOp : IOperation
	{
		TankSelector tankSelector;
		int tankNo;
		ushort bitMask;
		bool alreadyUnselected;
		int time;

		public UnselectTankOp(TankSelector tankSelector, int tankNo)
		{
			this.tankSelector = tankSelector;
			this.tankNo = tankNo;
			this.bitMask = (ushort)((tankNo == 1) ? 8 : ((tankNo == 2) ? 0x10 : ((tankNo == 3) ? 0x20 : 0)));
		}

		/// <summary>Start this operation</summary>
		public void Start()
		{
			if (tankSelector.CurrentlySelectedTankValid && (tankNo == 0))
			{
				alreadyUnselected = true;
			}
			else
			{
				tankSelector.CurrentlySelectedTank = tankNo;
				tankSelector.CurrentlySelectedTankValid = true;
				alreadyUnselected = false;
				time = 0;

				tankSelector.QuidoRS.SetBit(bitMask);
			}
		}

		/// <summary>Run this operation</summary>
		public Event Run()
		{
			if (alreadyUnselected)
			{
				return Event.ConditionMet;
			}
			else if (time == 0)
			{
				tankSelector.QuidoRS.ResetBit(bitMask);
				time++;
				return Event.ConditionNotMet;
			}
			else if (time <= 60)
			{
				time++;
				return Event.ConditionNotMet;
			}
			else
			{
				return Event.ConditionMet;
			}
		}

		/// <summary>Stop this operation</summary>
		public void Stop()
		{
		}
	}
}