///
/// Copyright (c) 2017 Sensus Metering Systems
///
namespace TBF.BenchControl.Modbus.TankSelector
{
	public class UnselectTankOp : IOperation
	{
		TankSelector tankSelector;
		TankId tankId;
		ushort unselectBitMask;
		bool doUnselect;
		bool unselectedWaitLevel;
		int time;

		public UnselectTankOp(TankSelector tankSelector)
		{
			this.tankSelector = tankSelector;
		}

		/// <summary>Start this operation</summary>
		public void Start()
		{
			if (tankSelector.CurrentActivity == Activity.Selected ||
				tankSelector.CurrentActivity == Activity.Selected_Waiting1min)
			{
				tankId = tankSelector.CurrentTank;
				unselectBitMask = (ushort)((tankId == TankId.Cold) ? QuidoOutputs.PumpToColdTank
										 : (tankId == TankId.Warm) ? QuidoOutputs.PumpToWarmTank
																   : QuidoOutputs.PumpToHotTank);
				doUnselect = true;
				unselectedWaitLevel = false;

				tankSelector.SetBit(unselectBitMask);
			}
			else if (tankSelector.CurrentActivity == Activity.Unselected_WaitingLevel)
			{
				tankId = tankSelector.CurrentTank;

				doUnselect = false;
				unselectedWaitLevel = true;
			}
			else /// tankSelector.CurrentActivity == Activity.Idle or Activity.Uknown
			{
				doUnselect = false;
				unselectedWaitLevel = false;
			}
		}

		/// <summary>Run this operation</summary>
		public Event Run()
		{
			if (doUnselect)
			{
				tankSelector.ResetBit(unselectBitMask);
				doUnselect = false;
				unselectedWaitLevel = true;
				return Event.ConditionNotMet;
			}
			else if (unselectedWaitLevel)
			{
				if (tankSelector.CurrentActivity == Activity.Idle)
				{
					unselectedWaitLevel = false;
					return Event.ConditionMet;
				}
				return Event.ConditionNotMet;
			}
			else
			{
				return Event.ConditionMet;
			}
		}

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