///
/// Copyright (c) 2017 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.Text;
using log4net;
using Config.Entities;
using TBF.BenchControl.GenericDevices;
using System.Windows.Forms;

namespace TBF.BenchControl.Network.Camera.Display
{
	public class Display : ComponentBase, IOperation, ICameraDisplay
	{
		private static readonly ILog log = LogManager.GetLogger(typeof(Display));
		public override string ToString()
		{
			return string.Format("{0}({1})", this.GetType().Namespace.Substring(17), Cfg.ToString(1));
		}


		public readonly DisplayCfg DisplayCfg;
		/// 
		public Display()
		{
		}
		/// 
		public Display(Generic.IComponentCfg cfg, IList<Generic.IComponent> components)
			: base(cfg)
		{
			DisplayCfg = cfg as DisplayCfg;

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



		public bool[] SelectedImages { get { return selectedImages; } }
		bool[] selectedImages;



		public enum CurrentOp
		{
			None,
			StaticImage,
			LiveStream,
		}
		CurrentOp currentOp;
		DialogResult result;

		string title;
		string[] imageFileNames;



		DisplayForm displayForm;
		/// 
		delegate void DisplayFormDlgt(Display myRef);
		/// 
		void OpenStaticImageDisplay(Display myRef)
		{
			myRef.displayForm = new DisplayForm(imageFileNames, title);
			displayForm.Show();
		}
		/// 
		void OpenLiveStreamDisplay(Display myRef)
		{
			myRef.displayForm = new DisplayForm(imageFileNames, title);
			displayForm.Show();
		}



		/// <returns>Reference to the operation</returns>
		public IOperation ShowStaticImageOp(string[] imageFileNames, string title)
		{
			if (currentOp != CurrentOp.None) throw new Exception("Sequence error");

			this.imageFileNames = imageFileNames;
			this.title = title;
			currentOp = CurrentOp.StaticImage;

			return this;
		}

		/// <returns>Reference to the operation</returns>
		public IOperation ShowLiveStreamOp(string[] imageFileNames, string title)
		{
			if (currentOp != CurrentOp.None) throw new Exception("Sequence error");

			this.imageFileNames = imageFileNames;
			this.title = title;
			currentOp = CurrentOp.LiveStream;

			return this;
		}



		/// <summary>Start this operation</summary>
		public void Start()
		{
			result = DialogResult.None;

			switch (currentOp)
			{
				case CurrentOp.StaticImage:
					Program.MainWnd.Invoke(new DisplayFormDlgt(OpenStaticImageDisplay), this);
					break;

				case CurrentOp.LiveStream:
					Program.MainWnd.Invoke(new DisplayFormDlgt(OpenLiveStreamDisplay), this);
					break;
			}
		}

		/// <summary>Run this operation</summary>
		/// <returns>Event.None</returns>
		public Event Run()
		{
			if (!displayForm.Completed)
			{
				return Event.ModelessFormIsOpen;
			}

			if (result == DialogResult.None)
			{
				/// Save the result (once)
				selectedImages = displayForm.SelectedImages;
				result = displayForm.Result;
				displayForm = null;
			}

			if      (result == DialogResult.OK)		return Event.OK;
			else if (result == DialogResult.Retry)	return Event.Retry;
			else if (result == DialogResult.Abort)	return Event.Abort;
			else return Event.None;		/// Should never happen
		}

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