///
/// Copyright (c) 2017 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using log4net;
using TBF.Resources;
using System.Drawing;
using System.Text;

namespace TBF.BenchControl.Network.Camera.Display
{
    public partial class DisplayForm : Form, GenericDevices.IHasCompleted
    {
		private static readonly ILog log = LogManager.GetLogger(typeof(DisplayForm));

		#region Closing this display from another thread

		/// <summary>
		/// Called from the state machine when an operation forces a modeless dialog close.
		/// </summary>
		public void CloseForm(object sender, EventArgs args)
		{
			if (CloseFormHandler == null) return;
			try { CloseFormHandler(sender, null); }
			catch (Exception e) { log.Error("CloseFormHandler(...) failed", e); }
		}
		public event EventHandler<EventArgs> CloseFormHandler;

		public void StartCloseFormHandler()
		{
			CloseFormHandler += delegate(object sender, EventArgs args)
			{
				if (InvokeRequired) { Invoke(new EventHandler<EventArgs>(OnCloseForm), sender, args); }
				else OnCloseForm(sender, args);
			};
		}

		private void OnCloseForm(object sender, EventArgs args)
		{
			DialogResult = DialogResult.Cancel;
			Close();
		}

		#endregion

		/// <summary> Number of text boxes for serial numbers </summary>
		readonly string[] imageFileNames;
		readonly int imagesCount;

		readonly GroupBox[] groupBoxes;
		readonly PictureBox[] pictureBoxes;
		readonly CheckBox[] checkBoxes;
		readonly int boxesCount;

		Timer myTimer;


		public bool[] SelectedImages;
		public DialogResult Result;		/// DialogResult.None OK Retry or Cancel


		/// Set to 'true' when the form closes
        public bool Completed { get { return completed; } }
		bool completed;

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="waterMetersCount">Number of text boxes for serial numbers</param>
        public DisplayForm(string[] imageFileNames, string title)
        {
			InitializeComponent();

			this.imageFileNames = imageFileNames;
			this.imagesCount = (imageFileNames == null) ? 0 : imageFileNames.Length;

			groupBoxes = new GroupBox[] { groupBox1, groupBox2, groupBox3, groupBox4, groupBox5, groupBox6 };
			pictureBoxes = new PictureBox[] { pictureBox1, pictureBox2, pictureBox3, pictureBox4, pictureBox5, pictureBox6 };
			checkBoxes = new CheckBox[] { checkBox1, checkBox2, checkBox3, checkBox4, checkBox5, checkBox6 };
			boxesCount = pictureBoxes.Length;

			Text = title;

			int lastVisibleGroupBoxIx = 0;
			for (int i = 0; i < boxesCount; i++)
			{
				if (i < imagesCount && !string.IsNullOrEmpty(imageFileNames[i]))
				{
					groupBoxes[i].Text = string.Format("{0} {1}", Strings.Water_Meter, i + 1);
					checkBoxes[i].Checked = true;
					checkBoxes[i].Text = Strings.Retry;
					lastVisibleGroupBoxIx = i;
				}
				else
				{
					groupBoxes[i].Visible = false;
					checkBoxes[i].Checked = false;
				}
			}

			SelectedImages = new bool[imagesCount];

			if (lastVisibleGroupBoxIx < 3) Height = 338;

			Result = DialogResult.None;
			completed = false;
			StartCloseFormHandler();
        }

		/// <summary> Parameterless constructor for all watermeters </summary>
		public DisplayForm()
			: this(null, string.Empty)
		{
		}

        private void CycleBeginningForm_Load(object sender, EventArgs e)
        {
			okButton.Text = Strings.OkBtnText;
			retryButton.Text = Strings.Retry;
			abortButton.Text = Strings.Abort;

			myTimer = new Timer();
			myTimer.Interval = (500);
			myTimer.Tick += new EventHandler(MyTimer_Tick);
			myTimer.Start();
		}

		private void MyTimer_Tick(object sender, EventArgs e)
		{
			for (int i = 0; i < Math.Min(imagesCount, boxesCount); i++)
			{
				if (imageFileNames[i] != null &&
					System.IO.File.Exists(imageFileNames[i]) &&
					pictureBoxes[i] != null &&
					pictureBoxes[i].Image == null)
				{
					pictureBoxes[i].Image = Image.FromFile(imageFileNames[i]); ;
					checkBoxes[i].Checked = false;
				}
			}
		}


		private void okButton_Click(object sender, EventArgs e)
        {
			log.Warn("OK clicked");
			Result = DialogResult.OK;
			CloseAfterButtonClick();
        }

		private void abortButton_Click(object sender, EventArgs e)
		{
			log.Warn("Abort clicked");
			Result = DialogResult.Abort;
			CloseAfterButtonClick();
		}

		private void retryButton_Click(object sender, EventArgs e)
		{
			log.Warn("Retry clicked");
			Result = DialogResult.Retry;
			CloseAfterButtonClick();
		}

		void CloseAfterButtonClick()
		{
			if (myTimer != null) myTimer.Stop();
			UpdateData();
			completed = true;
			Close();
		}

		void UpdateData()
		{
			StringBuilder sb = new StringBuilder();

			sb.Append("1 ");
			for (int i = 0; i < Math.Min(imagesCount, boxesCount); i++)
			{
				SelectedImages[i] = checkBoxes[i].Checked;
				sb.AppendFormat("{0}", checkBoxes[i].Checked ? "x" : "-");
			}
			sb.AppendFormat(" {0}", Math.Min(imagesCount, boxesCount));

			log.WarnFormat("Data updated: {0}", sb.ToString());
		}
	}
}