///
/// Copyright (c) 2013-2018 Sensus Slovensko a.s.
///
using log4net;
using TBF.UiBridge;

namespace TBF.BenchControl.Operations
{
    /// <summary>
    /// Implements User Interface input for the state machine.
    /// UI inserts commands int a queue (FIFO buffer).
    /// UiBridgeOp class reads the queue and generates events that
    /// in turn control state transitions in the state machine.
    /// </summary>
    public class CheckUIOp : IOperation
    {
		private static readonly ILog log = LogManager.GetLogger(typeof(CheckUIOp));
		public override string ToString() { return "CheckUIOp(" + clearInputQueue.ToString() + ")"; }

		/// Set by constructors
		bool clearInputQueue;

		/// <summary>
		/// Check input from UI for the state machine.
		/// Events:  Start,Stop,Cycle,Purge,LetOutLine,LetOutBalance,TestOpticalHeads,ResetResults,Calibration,SensitivityTest
		/// </summary>
		/// <param name="obj">true = clear queue on start</param>
		public CheckUIOp(bool clearInputQueue)
        {
			this.clearInputQueue = clearInputQueue;
        }
		public CheckUIOp()
			: this(false)
		{
		}

        void UiEventHandlerMethod(UI2BenchCmd cmd)
        {
            lock (Bridge.Ui2MachineQueue)
            {
                Bridge.Ui2MachineQueue.Enqueue(cmd);
            }
        }
        
        public void Start()
        {
            if (clearInputQueue)
            {
                lock (Bridge.Ui2MachineQueue)
				{
					Bridge.Ui2MachineQueue.Clear();
				}
            }
        }

        public Event Run()
        {
            UI2BenchCmd cmd;

            lock (Bridge.Ui2MachineQueue)
            {
                if (Bridge.Ui2MachineQueue.Count <= 0) return Event.None;

                if (Bridge.Ui2MachineQueue.Contains(UI2BenchCmd.Stop))
                {
                    do {
                        cmd = Bridge.Ui2MachineQueue.Dequeue();
                    }
                    while (cmd != UI2BenchCmd.Stop);
                }
                else if (Bridge.Ui2MachineQueue.Contains(UI2BenchCmd.Shutdown))
                {
                    do {
                        cmd = Bridge.Ui2MachineQueue.Dequeue();
                    }
                    while (cmd != UI2BenchCmd.Shutdown);
                }
                else
                {
                    cmd = Bridge.Ui2MachineQueue.Dequeue();
                }
            }

            switch (cmd)
            {
                /// Bench Control Panel buttons
				case UI2BenchCmd.ReloadBatch:		return Event.UiCmdReloadBatch;
				case UI2BenchCmd.StartTest:			return Event.UiCmdStartTest;
                case UI2BenchCmd.StartQ1:           return Event.UiCmdStartQ1;
                case UI2BenchCmd.StartQ2:           return Event.UiCmdStartQ2;
                case UI2BenchCmd.StartQ3:           return Event.UiCmdStartQ3;
                case UI2BenchCmd.StartCycle:        return Event.UiCmdStartCycle;
                case UI2BenchCmd.Stop:              return Event.UiCmdStop;
                case UI2BenchCmd.PurgeBegin:        return Event.UiCmdPurgeBegin;
                case UI2BenchCmd.PurgeEnd:          return Event.UiCmdPurgeEnd;
                case UI2BenchCmd.DrainTank1:        return Event.UiCmdDrainTank1;
                case UI2BenchCmd.DrainTank2:        return Event.UiCmdDrainTank2;
                case UI2BenchCmd.DrainTank3:        return Event.UiCmdDrainTank3;
				case UI2BenchCmd.StopDrainingTank1: return Event.UiCmdStopDrainingTank1;
				case UI2BenchCmd.StopDrainingTank2: return Event.UiCmdStopDrainingTank2;
				case UI2BenchCmd.StopDrainingTank3: return Event.UiCmdStopDrainingTank3;
				case UI2BenchCmd.Break:				return Event.UiCmdBreak;
                case UI2BenchCmd.ResetResults:      return Event.UiCmdResetResults;
				case UI2BenchCmd.AcceptResults:     return Event.UiCmdAcceptResults;
				case UI2BenchCmd.Shutdown:          return Event.UiCmdShutdown;
				case UI2BenchCmd.CameraTest:        return Event.UiCmdCameraTest;
				case UI2BenchCmd.SensitivityTest:   return Event.UiCmdSensitivityTest;
                case UI2BenchCmd.Custom:            return Event.UiCmdCustom;

                case UI2BenchCmd.Next:              return Event.Next;

                /// Test buttons
                case UI2BenchCmd.B1:                return Event.UiCmdB1;
                case UI2BenchCmd.B2:                return Event.UiCmdB2;
                case UI2BenchCmd.B3:                return Event.UiCmdB3;

                default: return Event.None;
            }
        }

        public void Stop()
        {
        }
    }
}