///
/// Copyright (c) 2013-2017 Senus Slovensko a.s.
///
using System;
using System.Windows.Forms;
using Common;
using Config;
using Config.Entities;
using TBF.Resources;

namespace TBF.UI.Procedures.TestWizard
{
	public partial class VolumeAndErrorSelection : Form
	{
        enum TabId
        {
            WaterMeterTab,
            HeatMeterTab,
        }

        Test test;
        TabId tabId;
        Unit volumeUnit;

		public VolumeAndErrorSelection()
		{
			InitializeComponent();

            tabId = 0;

            Text = Strings.Volume_and_error_selection;
            volumeLabel.Text = Strings.Volume;
            durationLabel.Text = Strings.Duration_s;
            errLoPctLabel.Text = Strings.Err_limit_neg_pct_chdr;
            errHiPctLabel.Text = Strings.Err_limit_pos_pct_chdr;
            uncertaintyLabel.Text = Strings.Uncertainty_pct_chdr;
            backButton.Text = Strings.BackBtnText;
            nextButton.Text = Strings.FinishBtnText;
            cancelButton.Text = Strings.CancelBtnText;
            tabPage1.Text = Strings.Water_Meter;
            tabPage2.Text = Strings.Heat_meter;
            classLabel.Text = Strings.Metrological_class;
            qpLabel.Text = "Qp [m3/h]";

            for (Unit u = 0; u < Unit.Count; u++)
            {
                if (Units.IsVolume(u)) unitComboBox.Items.Add(u.ToDescription());
            }
        }

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

            volumeUnit = test.VolumeUnit;
            unitComboBox.Text = (volumeUnit == Unit.None) ? Unit.l.ToDescription() : volumeUnit.ToDescription();

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

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

			volumeTextBox.Text = Units.ConvertTo(volumeUnit, test.Volume).ToString();
			durationTextBox.Text = test.TestTime.ToString();
			errLoPctTextBox.Text = test.ErrLimLo.ToString();
			errHiPctTextBox.Text = test.ErrLimHi.ToString();
			uncertaintyTextBox.Text = test.Uncertainty.ToString();
            classComboBox.Text = "2";

            volumeTextBox.TextChanged += new System.EventHandler(this.volumeTextBox_TextChanged);
            durationTextBox.TextChanged += new System.EventHandler(this.durationTextBox_TextChanged);

			nextButton.Enabled = IsFormValid();
		}

		bool IsFormValid()
		{
            int idummy;
			double dummy;

            bool tabsValid;
            switch (tabId)
            {
                default:
                case TabId.WaterMeterTab:
                    tabsValid = Utils.TryParseSDouble(errLoPctTextBox.Text, out dummy)
                             && Utils.TryParseSDouble(errHiPctTextBox.Text, out dummy);
                    break;
                case TabId.HeatMeterTab:
                    tabsValid = int.TryParse(classComboBox.Text, out idummy)
                             && idummy >= 1 && idummy <= 3
                             && Utils.TryParseUDouble(qpTextBox.Text, out dummy);
                    break;
            }
            
            /// Return complete result
			return tabsValid && Utils.TryParseUDouble(volumeTextBox.Text, out dummy)
            				 && Utils.TryParseUDouble(durationTextBox.Text, out dummy)
				             && Utils.TryParseUDouble(uncertaintyTextBox.Text, out dummy);
		}

		void UpdateTest()
		{
			test.Volume   = Units.ConvertFrom(volumeUnit, Utils.ParseUDouble(volumeTextBox.Text));
            test.VolumeUnit = volumeUnit;
            test.TestTime = Utils.ParseUDouble(durationTextBox.Text);
            test.Uncertainty = Utils.ParseUFloat(uncertaintyTextBox.Text);

            switch (tabId)
            {
                default:
                case TabId.WaterMeterTab:
                    test.ErrLimLo = Utils.ParseSFloat(errLoPctTextBox.Text);
                    test.ErrLimHi = Utils.ParseSFloat(errHiPctTextBox.Text);
                    break;
                case TabId.HeatMeterTab:
                    test.ErrLimLo = (float)int.Parse(classComboBox.Text);
                    test.ErrLimHi = -Utils.ParseUFloat(qpTextBox.Text);
                    break;
            }
		}

		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();
		}

        bool supressNotifications;

		private void volumeTextBox_TextChanged(object sender, EventArgs e)
		{
            if (supressNotifications) return;

			double Qave_lps = (test.QfromM3ph() + test.QtoM3ph()) / 7.2;
			double volume;
			if (Utils.TryParseUDouble(volumeTextBox.Text, out volume))
			{
                supressNotifications = true;
				durationTextBox.Text = (Units.ConvertFrom(volumeUnit, volume) / Qave_lps).ToString();
                supressNotifications = false;
            }
			anyTextBox_TextChanged(sender, e);
		}

        private void unitComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            var newUnit = Units.FromDescription(unitComboBox.Text);
            if (Units.IsQuantity(newUnit, Quantity.Volume))
            {
                volumeUnit = newUnit;
                double volume;
                if (Utils.TryParseUDouble(volumeTextBox.Text, out volume))
                {
                    double Qave_lps = (test.QfromM3ph() + test.QtoM3ph()) / 7.2;
                    supressNotifications = true;
                    durationTextBox.Text = (Units.ConvertFrom(volumeUnit, volume) / Qave_lps).ToString();
                    supressNotifications = false;
                }
            }
        }
        private void unitComboBox_TextChanged(object sender, EventArgs e)
        {
            unitComboBox_SelectedIndexChanged(sender, e);
        }

		private void durationTextBox_TextChanged(object sender, EventArgs e)
		{
            if (supressNotifications) return;
            double testTime;
            if (Utils.TryParseUDouble(durationTextBox.Text, out testTime))
			{
                double Qave_lps = (test.QfromM3ph() + test.QtoM3ph()) / 7.2;
                supressNotifications = true;
                volumeTextBox.Text = (testTime * Units.ConvertFrom(volumeUnit, Qave_lps)).ToString();
                supressNotifications = false;
            }
			anyTextBox_TextChanged(sender, e);
		}

        private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch ((TabId)tabControl1.SelectedIndex)
            {
                default:
                case TabId.WaterMeterTab:
                    tabId = TabId.WaterMeterTab;
                    break;

                case TabId.HeatMeterTab:
                    tabId = TabId.HeatMeterTab;
                    break;
            }

            nextButton.Enabled = IsFormValid();
        }
    }
}