///
/// Copyright (c) 2013-2015 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using TBF.Resources;

namespace TBF.TestWizard
{
	public partial class VolumeAndErrorSelection : Form
	{
		Entities.Test test;

		public VolumeAndErrorSelection()
		{
			InitializeComponent();
		}

		public VolumeAndErrorSelection(bool first, bool last, Entities.Test test)
			: this()
		{
			this.test = test;

			Text = Strings.Volume_and_error_selection;
			volumeLabel.Text = Strings.Volume_ltr_chdr;
			durationLabel.Text = Strings.Duration_s;
			errLoPctLabel.Text = Strings.Err_limit_neg_pct_chdr;
			errHiPctLabel.Text = Strings.Err_limit_pos_pct_chdr;
			backButton.Text = Strings.BackBtnText;
			nextButton.Text = Strings.FinishBtnText;
			cancelButton.Text = Strings.CancelBtnText;

			if (first) backButton.Visible = false;
			if (last) nextButton.Text = Strings.FinishBtnText;
		}

		private void VolumeAndErrorSelection_Load(object sender, EventArgs e)
		{
			if (test == null) return;

			RefreshWizardPage();
		}

		void RefreshWizardPage()
		{
			volumeTextBox.Text = test.Volume.ToString();
			durationTextBox.Text = test.TstTime.ToString();
			errLoPctTextBox.Text = test.ErrLimLo.ToString();
			errHiPctTextBox.Text = test.ErrLimHi.ToString();

			nextButton.Enabled = IsFormValid();
		}

		bool IsFormValid()
		{
			float dummy;
			return Utils.TryParseUFloat(volumeTextBox.Text, out dummy) &&
				   Utils.TryParseUFloat(durationTextBox.Text, out dummy) &&
				   Utils.TryParseSFloat(errLoPctTextBox.Text, out dummy) &&
				   Utils.TryParseSFloat(errHiPctTextBox.Text, out dummy);
		}

		void UpdateTest()
		{
			test.Volume   = Utils.ParseUFloat(volumeTextBox.Text);
			test.TstTime  = Utils.ParseUFloat(durationTextBox.Text);
			test.ErrLimLo = Utils.ParseSFloat(errLoPctTextBox.Text);
			test.ErrLimHi = Utils.ParseSFloat(errHiPctTextBox.Text);
		}

		private void backButton_Click(object sender, EventArgs e)
		{
			if (test != null && IsFormValid()) UpdateTest();
			DialogResult = DialogResult.Retry;
			Close();
		}

		private void nextButton_Click(object sender, EventArgs e)
		{
			if (test != null && IsFormValid())
			{
				UpdateTest();
				DialogResult = DialogResult.OK;
				Close();
			}
			else
			{
				DialogResult = DialogResult.None;
			}
		}

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

		private void anyTextBox_TextChanged(object sender, EventArgs e)
		{
			nextButton.Enabled = IsFormValid();
		}

		private void volumeTextBox_TextChanged(object sender, EventArgs e)
		{
			float Qave_lps = (test.Qfrom + test.Qto) / 7.2f;
			float volume;
			if (Utils.TryParseUFloat(volumeTextBox.Text, out volume))
			{
				durationTextBox.TextChanged -= new System.EventHandler(this.durationTextBox_TextChanged);
				durationTextBox.Text = (volume / Qave_lps).ToString();
				durationTextBox.TextChanged += new System.EventHandler(this.durationTextBox_TextChanged);
			}
			anyTextBox_TextChanged(sender, e);
		}

		private void durationTextBox_TextChanged(object sender, EventArgs e)
		{
			float Qave_lps = (test.Qfrom + test.Qto) / 7.2f;
			float testTime;
			if (Utils.TryParseUFloat(durationTextBox.Text, out testTime))
			{
				volumeTextBox.TextChanged -= new System.EventHandler(this.volumeTextBox_TextChanged);
				volumeTextBox.Text = (testTime * Qave_lps).ToString();
				volumeTextBox.TextChanged += new System.EventHandler(this.volumeTextBox_TextChanged);
			}
			anyTextBox_TextChanged(sender, e);
		}
	}
}