///
/// Copyright (c) 2013-2015 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using log4net;
using TBF.Rig.GenericDevices;
using TBF.Resources;

namespace TBF.Rig.DataEntry.Combined
{
	public partial class TestStartEndForm : Form, GenericDevices.IHasCompleted
    {
		private static readonly ILog log = LogManager.GetLogger(typeof(TestStartEndForm));

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

		/// <summary> Number of water meters </summary>
        public readonly int WaterMetersCount;	/// Main + Aux water meter count as one (combined) water meter
		readonly IRegReader[] regReaders;
		readonly bool[] disabled;

		// To be retrieved after the form closes
		public double[] MainStartState;
		public double[] AuxStartState;

		// To be retrieved after the form closes
		public readonly string[] MainStartStateStr;
		public readonly string[] AuxStartStateStr;

		// To be retrieved after the form closes
        public double[] MainEndState;
		public double[] AuxEndState;

		bool endStates;			/// false=start states, true=end states
		double refVolume;
		double warningLimLo;	/// limit to display exclamation mark, typically 2x errLimLo
		double warningLimHi;	/// limit to display exclamation mark, typically 2x errLimHi

		int TextBoxesCount;
		///
		Label[] mainLabels;
		Label[] auxLabels;
		TextBox[] mainStartTextBoxes;
		TextBox[] auxStartTextBoxes;
		TextBox[] mainEndTextBoxes;
		TextBox[] auxEndTextBoxes;
		IList<TextBox> enabledTextBoxes;

		/// <summary>
		/// Parameterless constructor initializing common part for start and endstate form
		/// </summary>
		public TestStartEndForm()
		{
			InitializeComponent();

            this.Icon = Properties.Resources.TBF_icon;

            ControlBox = false;

			TextBoxesCount = 3;

			endStates = false;
			mainLabels = new Label[] { main1Label,  main2Label,  main3Label, };
			auxLabels = new Label[] { aux1Label, aux2Label, aux3Label, };
			mainStartTextBoxes = new TextBox[] { main1StartTextBox, main2StartTextBox, main3StartTextBox, };
			auxStartTextBoxes = new TextBox[] { aux1StartTextBox, aux2StartTextBox, aux3StartTextBox, };
			mainEndTextBoxes = new TextBox[] { main1EndTextBox, main2EndTextBox, main3EndTextBox, };
			auxEndTextBoxes = new TextBox[] { aux1EndTextBox, aux2EndTextBox, aux3EndTextBox, };
			enabledTextBoxes = new List<TextBox>();

			completed = false;
			StartForceCloseHandler();
		}

		/// <summary>
		/// Constructor to fill in start states
		/// </summary>
		/// <param name="waterMetersCount">Number of water meters</param>
		/// <param name="disabled">Information from CycleBeginningForm about availability of water meters</param>
		public TestStartEndForm(int waterMetersCount, IRegReader[] regReaders, bool[] disabled)
			: this()
		{
			endStates = false;

			this.WaterMetersCount = waterMetersCount;
			this.regReaders = regReaders;
			this.disabled = disabled;

			ShuffleTextBoxes();

			MainStartState = new double[waterMetersCount];
			AuxStartState = new double[waterMetersCount];
			MainStartStateStr = new string[waterMetersCount];
			AuxStartStateStr = new string[waterMetersCount];
		}

        /// <summary>
        /// Constructor to fill in end states
        /// </summary>
		/// <param name="waterMetersCount">Number of water meters</param>
		/// <param name="mainStartStateStr">Information entered on test start (main)</param>
		/// <param name="auxStartStateStr">Information entered on test start (aux)</param>
		/// <param name="disabled">Information from CycleBeginningForm about availability of water meters</param>
		/// <param name="refVolume">Reference volume, it is used to verify the end state, show/hide exclamation if necessary</param>
		/// <param name="errLimLo">Error limit low, it is used to verify the end state, show/hide exclamation if necessary</param>
		/// <param name="errLimHi">Error limit high, it is used to verify the end state, show/hide exclamation if necessary</param>
		public TestStartEndForm(int waterMetersCount, IRegReader[] regReaders, string[] mainStartStateStr, string[] auxStartStateStr,
								bool[] disabled, double refVolume, double errLimLo, double errLimHi)
			: this()
        {
			endStates = true;

			this.WaterMetersCount = waterMetersCount;
			this.regReaders = regReaders;
			if (mainStartStateStr == null || mainStartStateStr.Length != waterMetersCount)
				throw (new Exception("Invalid 'mainStartStateStr' argument"));
			this.MainStartStateStr = mainStartStateStr;
			if (auxStartStateStr == null || auxStartStateStr.Length != waterMetersCount)
				throw (new Exception("Invalid 'auxStartStateStr' argument"));
			this.AuxStartStateStr = auxStartStateStr;
			this.disabled = disabled;
            this.refVolume = refVolume;
            this.warningLimLo = 2 * errLimLo;
            this.warningLimHi = 2 * errLimHi;

			ShuffleTextBoxes();

			MainEndState = new double[waterMetersCount];
			AuxEndState = new double[waterMetersCount];
		}

		/// <summary>
		/// Make sure the layout of labels/text boxes on the screen
		/// corresponds to the layout of watermeters of the test bench.
		/// </summary>
		void ShuffleTextBoxes()
		{
			if (TBF.Data.CompoundWMsCount < TextBoxesCount)
			{
				TextBoxesCount = TBF.Data.CompoundWMsCount;
			}
		}

		private void CycleEndForm_Load(object sender, EventArgs e)
		{
            Localize();

            //Height = 115 + 90 * WaterMetersCount;

			for (int i = 0; i < TextBoxesCount; i++)
			{
				if (i < WaterMetersCount)
				{
					mainLabels[i].Visible = mainStartTextBoxes[i].Visible = mainEndTextBoxes[i].Visible = true;
					auxLabels[i].Visible = auxStartTextBoxes[i].Visible = auxEndTextBoxes[i].Visible = true;
				}
			}
			if (TextBoxesCount >= 1) groupBox1.Visible = true;
			if (TextBoxesCount >= 2) groupBox2.Visible = true;
			if (TextBoxesCount >= 3) groupBox3.Visible = true;

			if (endStates)
			{
				for (int i = 0; i < TextBoxesCount; i++)
				{
					if (MainStartStateStr != null && i < MainStartStateStr.Length)
					{
						mainStartTextBoxes[i].Text = MainStartStateStr[i];
					}
					if (AuxStartStateStr != null && i < AuxStartStateStr.Length)
					{
						auxStartTextBoxes[i].Text = AuxStartStateStr[i];
					}

					if (disabled != null && i < disabled.Length && disabled[i])
					{
						mainEndTextBoxes[i].Enabled = false;
						auxEndTextBoxes[i].Enabled = false;
					}
					else
					{
						mainEndTextBoxes[i].Enabled = true;
						auxEndTextBoxes[i].Enabled = true;
						enabledTextBoxes.Add(mainEndTextBoxes[i]);
						enabledTextBoxes.Add(auxEndTextBoxes[i]);
					}
				}
			}
			else
			{
				for (int i = 0; i < TextBoxesCount; i++)
				{
					if (disabled != null && i < disabled.Length && disabled[i])
					{
						mainStartTextBoxes[i].Enabled = false;
						auxStartTextBoxes[i].Enabled = false;
					}
					else
					{
						mainStartTextBoxes[i].Enabled = true;
						auxStartTextBoxes[i].Enabled = true;
						enabledTextBoxes.Add(mainStartTextBoxes[i]);
						enabledTextBoxes.Add(auxStartTextBoxes[i]);
					}
				}
			}
		}

		void Localize()
		{
			Text = Strings.Water_Meter_States;
			groupBox1.Text = Strings.Water_Meter + " 1";
			groupBox2.Text = Strings.Water_Meter + " 2";
			groupBox3.Text = Strings.Water_Meter + " 3";
			for (int i = 0; i < TextBoxesCount; i++)
			{
				mainLabels[i].Text = Strings.Main_;
				auxLabels[i].Text = Strings.Aux_;
			}
			startLabel.Text = Strings.Start;
			endLabel.Text = Strings.End;
			okButton.Text = Strings.OkBtnText;
		}

		private void okButton_Click(object sender, EventArgs eArgs)
		{
            try
            {
				if (endStates)
				{
					for (int i = 0; i < Math.Min(WaterMetersCount, TextBoxesCount); i++)
					{
						if (mainEndTextBoxes[i].Visible && mainEndTextBoxes[i].Enabled)
						{
							MainEndState[i] = Utils.ParseUDouble(mainEndTextBoxes[i].Text);
						}
						if (auxEndTextBoxes[i].Visible && auxEndTextBoxes[i].Enabled)
						{
							AuxEndState[i] = Utils.ParseUDouble(auxEndTextBoxes[i].Text);
						}
					}
				}
				else
				{
					for (int i = 0; i < Math.Min(WaterMetersCount, TextBoxesCount); i++)
					{
						if (mainStartTextBoxes[i].Visible && mainStartTextBoxes[i].Enabled)
						{
							MainStartStateStr[i] = mainStartTextBoxes[i].Text;
							MainStartState[i] = Utils.ParseUDouble(mainStartTextBoxes[i].Text);
						}
						if (auxStartTextBoxes[i].Visible && auxStartTextBoxes[i].Enabled)
						{
							AuxStartStateStr[i] = auxStartTextBoxes[i].Text;
							AuxStartState[i] = Utils.ParseUDouble(auxStartTextBoxes[i].Text);
						}
					}
				}
			}
			catch (Exception e)
            {
				log.ErrorFormat("Exception: {0}", e.Message);
				return;
            }

			completed = true;
			Close();
		}

		#region Forced close handling

		public void StartForceCloseHandler()
		{
			UiBridge.Bridge.CloseModelessFormHandler += delegate(object sender, EventArgs args)
			{
				if (InvokeRequired) { Invoke(new EventHandler<EventArgs>(OnForceClose), sender, args); }
				else OnForceClose(sender, args);
			};
		}

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

		#endregion

		/// <summary>
		/// Calculate the approximate error and verify whether it is within limits.
		/// Make an exclamation mark visible if out of range.
		/// Similar event handler is implemented for all main/auxEndTextBoxes (1..3).
		/// </summary>
		private void main1EndTextBox_TextChanged(object sender, EventArgs e)
		{
			//double err = 0;
			//try
			//{
			//    double endState = Utils.ParseUDouble(main1EndTextBox.Text);
			//    double startState = Utils.ParseUDouble(main1StartTextBox.Text);
			//    err = 100.0 * (endState - startState - refVolume) / refVolume;
			//}
			//catch { };

			//main1Exclamation.Visible = (err < warningLimLo) || (warningLimHi < err);
		}

		private void aux1EndTextBox_TextChanged(object sender, EventArgs e)
		{
			//double err = 0;
			//try
			//{
			//    double endState = Utils.ParseUDouble(aux1EndTextBox.Text);
			//    double startState = Utils.ParseUDouble(aux1StartTextBox.Text);
			//    err = 100.0 * (endState - startState - refVolume) / refVolume;
			//}
			//catch { err = 1000.0f; };

			//aux1Exclamation.Visible = (err < warningLimLo) || (warningLimHi < err);
		}

		private void main2EndTextBox_TextChanged(object sender, EventArgs e)
		{
			//double err = 0;
			//try
			//{
			//    double endState = Utils.ParseUDouble(main2EndTextBox.Text);
			//    double startState = Utils.ParseUDouble(main2StartTextBox.Text);
			//    err = 100.0 * (endState - startState - refVolume) / refVolume;
			//}
			//catch { err = 1000.0f; };

			//main2Exclamation.Visible = (err < warningLimLo) || (warningLimHi < err);
		}

		private void aux2EndTextBox_TextChanged(object sender, EventArgs e)
		{
			//double err = 0;
			//try
			//{
			//    double endState = Utils.ParseUDouble(aux2EndTextBox.Text);
			//    double startState = Utils.ParseUDouble(aux2StartTextBox.Text);
			//    err = 100.0 * (endState - startState - refVolume) / refVolume;
			//}
			//catch { err = 1000.0f; };

			//aux2Exclamation.Visible = (err < warningLimLo) || (warningLimHi < err);
		}

		private void main3EndTextBox_TextChanged(object sender, EventArgs e)
		{
			//double err = 0;
			//try
			//{
			//    double endState = Utils.ParseUDouble(main3EndTextBox.Text);
			//    double startState = Utils.ParseUDouble(main3StartTextBox.Text);
			//    err = 100.0 * (endState - startState - refVolume) / refVolume;
			//}
			//catch { err = 1000.0f; };

			//main3Exclamation.Visible = (err < warningLimLo) || (warningLimHi < err);
		}

		private void aux3EndTextBox_TextChanged(object sender, EventArgs e)
		{
			//double err = 0;
			//try
			//{
			//    double endState = Utils.ParseUDouble(aux3EndTextBox.Text);
			//    double startState = Utils.ParseUDouble(aux3StartTextBox.Text);
			//    err = 100.0 * (endState - startState - refVolume) / refVolume;
			//}
			//catch { err = 1000.0f; };

			//aux3Exclamation.Visible = (err < warningLimLo) || (warningLimHi < err);
		}


		/// <summary>
		/// Process a key press within any enabled text boxe
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		/// <param name="currentFocusOwner">TextBox control which received the event</param>
		private void ProcKeyPress(object sender, KeyPressEventArgs e, TextBox currentFocusOwner)
		{
			if (e.KeyChar == '+')
			{
				/// Process '+' key ..... Form completed
				okButton_Click(sender, e);
			}
			if (e.KeyChar == '\r')
			{
				/// Process <enter> key ..... Next text field
				if (enabledTextBoxes.Count < 2) return;		/// There is just one enabled textbox

				for (int i = 0; i < enabledTextBoxes.Count; i++)
				{
					if (enabledTextBoxes[i] == currentFocusOwner)
					{
						/// Change focus to the next enabled text box
						enabledTextBoxes[(i + 1) % enabledTextBoxes.Count].Focus();
						return;
					}
				}
			}
		}

		private void main1StartTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, main1StartTextBox); }
		private void main2StartTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, main2StartTextBox); }
		private void main3StartTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, main3StartTextBox); }

		private void aux1StartTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, aux1StartTextBox); }
		private void aux2StartTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, aux2StartTextBox); }
		private void aux3StartTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, aux3StartTextBox); }

		private void main1EndTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, main1EndTextBox); }
		private void main2EndTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, main2EndTextBox); }
		private void main3EndTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, main3EndTextBox); }

		private void aux1EndTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, aux1EndTextBox); }
		private void aux2EndTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, aux2EndTextBox); }
		private void aux3EndTextBox_KeyPress(object sndr, KeyPressEventArgs e) { ProcKeyPress(sndr, e, aux3EndTextBox); }
	}
}