///
/// Copyright (c) 2018 Sensus Slovensko a.s.
///
using System;
using log4net;
using TBF.BenchControl.GenericDevices;
using TBF.BenchControl.Configs.NameOnly;
using TBF.Boxes;

namespace TBF.BenchControl.Various.ManualLevelMsrmnt
{
	public class ManualLevelMsrmnt : ComponentBase, ILevelMeter, IOperation
	{
        private static readonly ILog log = LogManager.GetLogger(typeof(ManualLevelMsrmnt));
		public override string ToString() { return string.Format("ManualLevelMsrmnt({0})", Cfg.ToString(1)); }

		readonly TestMethodCfg myCfg;

		DoubleBox levelBox;

		public double WaterLevelMm;

        WaterLevelForm waterLevelForm;

		bool resultSaved;								/// Set in Run() when results are saved

		public enum CurrentOp
		{
			None,
			EnterLevel,
		}
		CurrentOp currentOp;


		public ManualLevelMsrmnt()
		{
			currentOp = CurrentOp.None;
		}

		public ManualLevelMsrmnt(Generic.IComponentCfg cfg)
			: base(cfg)
		{
			myCfg = cfg as TestMethodCfg;

			currentOp = CurrentOp.None;
            log.Debug(this.ToString());
        }


		/// <returns>Reference to the operation</returns>
		public IOperation ReadLevelOp(ref DoubleBox levelBox)
		{
			if (currentOp != CurrentOp.None) throw new Exception("Sequence error");
			this.levelBox = levelBox;
			currentOp = CurrentOp.EnterLevel;
			return this;
		}


        delegate void EntryFormDlgt(ManualLevelMsrmnt myRef);
        /// 
		void OpenWaterLevelForm(ManualLevelMsrmnt myRef)
		{
			myRef.waterLevelForm = new WaterLevelForm();
			waterLevelForm.Show();
		}


		/// <summary>Start this operation</summary>
		public void Start()
		{
			resultSaved = false;
			if (currentOp == CurrentOp.EnterLevel)
            {
				Program.MainWnd.Invoke(new EntryFormDlgt(OpenWaterLevelForm), this);
			}
		}

		/// <summary>Run this operation</summary>
		/// <returns>Event.ResultsPrinted</returns>
		public Event Run()
		{
			if ((waterLevelForm != null) && !waterLevelForm.Completed)
			{
				return Event.Busy;		/// = Form open
			}

            if (!resultSaved && (currentOp == CurrentOp.EnterLevel) && (waterLevelForm != null))
			{
                /// Save the result (only once)
                WaterLevelMm = waterLevelForm.WaterLevelMm;
				if (levelBox != null) levelBox.Val = WaterLevelMm;
				resultSaved = true;
			}

			return Event.LevelDone;		/// = Form closed
		}

		/// <summary>Stop this operation</summary>
		public void Stop()
		{
			if (waterLevelForm != null)
			{
                waterLevelForm.OnCloseThisForm(this, null);
                waterLevelForm = null;
			}
			currentOp = CurrentOp.None;
		}
	}
}