using System;
using System.Collections.Generic;
using log4net;

namespace TBF.BenchControl.Elde.PumpWithFM
{
	public class Pump : Generic.IComponent, GenericDevices.IPumpFM, GenericDevices.IValve, IOperation
	{
		/// <summary>
		/// Info: StartMassMeasurement() and "Balance response = .., Mass = ..."
		/// Warn: Start measurement when busy is true
		/// </summary>
		private static readonly ILog log = LogManager.GetLogger(typeof(Pump));
        public override string ToString()
		{
            return string.Format("Pump(name={0}, bit={1}, idx={2})", Name, bitPosition, FMIndex);
		}

		public static void ResetStaticProperties() { }

		private readonly PumpCfg pumpCfg;
		public Generic.IComponentCfg Cfg { get { return pumpCfg; } }

		public string Name { get { return pumpCfg.Name; } }

		public GenericDevices.IValve CoupledTo { get { return null; } }
		public bool Invert { get { return false; } }
		public int LagOpening { get { return 0; } }
		public int LagClosing { get { return 0; } }

		readonly ControlBoardDev controlBoard;
        readonly int bitPosition;					/// 0 .. 63
        int FMIndex; 					    /// 0 .. FMPumpsCount-1

		public readonly ulong Mask;					/// derived from bitPosition in the constructor

		public bool State
		{
			get { return (controlBoard.Route & Mask) != 0; }
		}


		public Pump(PumpCfg cfg, IList<Generic.IComponent> components)
		{
			if (cfg == null) throw new ArgumentNullException("cfg");
			this.pumpCfg = cfg;

			controlBoard = (ControlBoardDev)TbfComponents.FindComponent(cfg.ParentName, components);
			if (controlBoard == null) throw new Exception("Cannot find " + Name + " parent");

			this.bitPosition = cfg.BitPosition;
			this.Mask = (((ulong)1) << bitPosition);
            this.FMIndex = cfg.FMIndex;

			log.Debug(this.ToString());
		}

		/// <summary>
		/// The currently running operation.
		/// </summary>
		public enum CurrentOp
		{
			None,
			TurnOn,
			TurnOff,
		}
		/// 
		CurrentOp currentOp;

		/// <summary>
		/// Turn the pump frequency inverter on.
		/// </summary>
		public IOperation TurnOn()
		{
			if (currentOp != CurrentOp.None) throw new Exception("Sequence error");
			currentOp = CurrentOp.TurnOn;
			return this;
		}

		/// <summary>
		/// Turn the pump frequency inverter on.
		/// </summary>
		public IOperation TurnOff()
		{
			if (currentOp != CurrentOp.None) throw new Exception("Sequence error");
			currentOp = CurrentOp.TurnOff;
			return this;
		}

		/// <summary>Start the operation</summary>
		public void Start()
		{
			switch (currentOp)
			{
				case CurrentOp.TurnOn:
					controlBoard.SetFMFreq(FMIndex, 50.0f);
					return;
				case CurrentOp.TurnOff:
				default:
					controlBoard.SetFMFreq(FMIndex, 0.0f);
					return;
			}
		}

		/// <summary>Run the operation</summary>
		public Event Run()
		{
			return Event.TurnPumpOnOffDone;
		}

		/// <summary>Stop the operation</summary>
		public void Stop()
		{
			currentOp = CurrentOp.None;
		}
	}
}