using System;
using log4net;
using TBF.BenchControl;

namespace TBF.BenchControl.Operations
{
	public class ReadMoreRegistersOp : IOperation
	{
		private static readonly ILog log = LogManager.GetLogger(typeof(ReadMoreRegistersOp));
		public override string ToString() { return string.Format("ReadAllRegistersOp()"); }

		/// Set by the constructor
		int readersCount;
		int[] iPulses;
        int[] iRefPulses;
        IntBox[] pulses;
        IntBox[] refPulses;
		IOperation[] readRegOps;
		Event[] events;

		/// <summary>
		/// Events:  eventDone (default=Event.ReadRegisterDone) or Event.Error
		/// </summary>
		/// <param name="register">Register reader reference</param>
		/// <param name="pulses">Reference to the water meter register state in pulses</param>
		public ReadMoreRegistersOp(GenericDevices.IRegisterReader[] readers, ref int[] iPulses)
        {
			if (readers == null) throw new ArgumentNullException("readers");

			readersCount = readers.Length;

			if (iPulses == null || iPulses.Length != readersCount)
            {
                throw new ArgumentException("iPulses");
            }
			this.iPulses = iPulses;

            pulses = new IntBox[Program.WMsCount];

			readRegOps = new IOperation[readersCount];
			for (int i = 0; i < readersCount; i++)
			{
                pulses[i] = new IntBox(iPulses[i]);

				if (readers[i] != null)
				{
					readRegOps[i] = readers[i].ReadRegisterOp(ref pulses[i]);
				}
			}
			log.Debug(this.ToString());
        }

		/// <summary>
		/// Events:  eventDone (default=Event.ReadRegisterDone) or Event.Error
		/// </summary>
		/// <param name="register">Register reader reference</param>
		/// <param name="pulses">Reference to the water meter register state in pulses</param>
		public ReadMoreRegistersOp(GenericDevices.IRegisterReader[] readers, ref int[] iPulses, ref int[] iRefPulses)
			: this(readers, ref iPulses)
		{
			if (readers == null) throw new ArgumentNullException("readers");

			readersCount = readers.Length;

			if (iPulses == null || iPulses.Length != readersCount ||
				iRefPulses == null || iRefPulses.Length != readersCount)
			{
				throw new ArgumentException("iPulses or iRefPulses");
			}
			this.iPulses = iPulses;
			this.iRefPulses = iRefPulses;

			pulses = new IntBox[Program.WMsCount];
			refPulses = new IntBox[Program.WMsCount];

			readRegOps = new IOperation[readersCount];
			for (int i = 0; i < readersCount; i++)
			{
				pulses[i] = new IntBox(iPulses[i]);
				refPulses[i] = new IntBox(iRefPulses[i]);

				if (readers[i] != null)
				{
					readRegOps[i] = readers[i].ReadRegisterOp(ref pulses[i], ref refPulses[i]);
				}
			}
			log.Debug(this.ToString());
		}

		/// <summary>Start this operation</summary>
		public void Start()
        {
			for (int i = 0; i < readersCount; i++)
			{
				if (readRegOps[i] != null) readRegOps[i].Start();
			}
		}

		/// <summary>Run this operation</summary>
		public Event Run()
		{
			bool allDone = true;
			bool anyError = false;

			for (int i = 0; i < readersCount; i++)
			{
				if (readRegOps[i] != null)
				{
					Event evnt = readRegOps[i].Run();
                    iPulses[i] = pulses[i].N;
					if (iRefPulses != null)
					{
						iRefPulses[i] = refPulses[i].N;
					}
                    if (evnt == Event.Error) anyError = true;
					if (evnt != Event.ReadRegisterDone) allDone = false;
				}
			}

			if (anyError) return Event.Error;
			if (allDone) return Event.ReadAllRegistersDone;
			return Event.None;
		}

		/// <summary>Stop this operation</summary>
		public void Stop()
		{
			for (int i = 0; i < readersCount; i++)
			{
				if (readRegOps[i] != null) readRegOps[i].Stop();
			}
		}
	}
}