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

namespace TBF.UiControls
{
	public partial class MetrologyDlgBalanceTab : UserControl, IMetrologyDlgTab
	{
		static readonly ILog log = LogManager.GetLogger(typeof(MetrologyDlgBalanceTab));

		/// <summary>
		/// Component entity that has a list of 'measurement-correction' pairs
		/// to be updated in the database on OK.
		/// </summary>
		public Component MeterEntity
		{
			get { return meterEntity; }
			set { meterEntity = value; }
		}
		Component meterEntity;

		/// <summary>
		/// A list of 'measurement-correction' pairs to be deleted from the database on OK.
		/// </summary>
		public IList<MeasurementCorrection> ToBeRemoved
		{
			get { return toBeRemoved; }
			set { toBeRemoved = value; }
		}
		IList<MeasurementCorrection> toBeRemoved;

		MetrologyDlg parent;
		bool unlocked;
		Control measurementTextBox;
		Control correctionTextBox;

		public MetrologyDlgBalanceTab()
		{
			InitializeComponent();
			toBeRemoved = new List<MeasurementCorrection>();
			unlocked = false;
		}

		private void MetrologyDlgBalanceTab_Load(object sender, System.EventArgs e)
		{
			if (meterEntity == null) return;

			parent = ParentForm as MetrologyDlg;

			/// Panel1
			cmpntNameLabel.Text = meterEntity.Name;

			testGroupBox.Text = Strings.Test_measured_corrected;
			measuredLabel.Text = Strings.Measured;
			correctedLabel.Text = Strings.Corrected;
			measuredTextBox.Text = string.Empty;
			correctedTextBox.Text = string.Empty;

			/// Panel2
			measurementTextBox = new TextBox();
			correctionTextBox = new TextBox();
			this.Controls.Add(measurementTextBox);
			this.Controls.Add(correctionTextBox);

			listViewEx.SubItemClicked += new SubItemEventHandler(listViewEx_SubItemClicked);
			listViewEx.SubItemEndEditing += new SubItemEndEditingEventHandler(listViewEx_SubItemEndEditing);

			listViewEx.Columns.Add(new ColumnHeader() { Text = Strings.Nr, Width = 60 });
			listViewEx.Columns.Add(new ColumnHeader() { Text = Strings.Mass_kg, Width = 100 });
			listViewEx.Columns.Add(new ColumnHeader() { Text = Strings.Correction_g, Width = 100 });

			RefreshAll();
		}

		void RefreshAll()
		{
			listViewEx.Items.Clear();
			foreach (var corr in MeterEntity.Corrections) AddOneLVI(corr);
		}

		void AddOneLVI(MeasurementCorrection corr)
		{
			int nr = listViewEx.Items.Count + 1;
			ListViewItem lvi = new ListViewItem(nr.ToString());
			lvi.SubItems.Add(corr.Measurement.ToString());
			lvi.SubItems.Add((corr.Correction * 1000.0f).ToString());
			lvi.Tag = corr;
			listViewEx.Items.Add(lvi);
		}

		void listViewEx_SubItemClicked(object sender, SubItemEventArgs e)
		{
			if (unlocked && e.SubItem == 1)
			{
				listViewEx.StartEditing(measurementTextBox, e.Item, e.SubItem);
			}
			else if (unlocked && e.SubItem == 2)
			{
				listViewEx.StartEditing(correctionTextBox, e.Item, e.SubItem);
			}
		}

		void listViewEx_SubItemEndEditing(object sender, SubItemEndEditingEventArgs e)
		{
			float value;
			if (e.SubItem == 1 && Utils.TryParseEFloat(e.DisplayText, out value) && value >= 0)
			{
				(e.Item.Tag as MeasurementCorrection).Measurement = value;
				return;
			}
			else if (e.SubItem == 2 && Utils.TryParseEFloat(e.DisplayText, out value))
			{
				(e.Item.Tag as MeasurementCorrection).Correction = value / 1000.0f;
				return;
			}

			e.DisplayText = e.Item.Text;
			e.Cancel = true;
		}

		public void Unlock()
		{
			unlocked = true;

            if (listViewEx.SelectedItems.Count == 1)
            {
                int ix = listViewEx.SelectedIndices[0];
                listViewEx.Focus();
                listViewEx.Items[ix].Selected = true;
                listViewEx.Items[ix].EnsureVisible();
            }
        }

		public void OkBtnClicked()
		{
		}

		public void CancelBtnClicked()
		{
		}

		public void AddOne()
		{
			MeasurementCorrection corr = new MeasurementCorrection();
			MeterEntity.Corrections.Add(corr);
			AddOneLVI(corr);

            listViewEx.Focus();
            listViewEx.SelectedItems.Clear();
            listViewEx.Items[listViewEx.Items.Count - 1].Selected = true;
            listViewEx.Items[listViewEx.Items.Count - 1].EnsureVisible();
        }

		public void RemoveSelected()
		{
			if (listViewEx.SelectedItems.Count != 1) return;

            int removeItemNr = listViewEx.SelectedIndices[0];

			MeasurementCorrection selected =
				(MeasurementCorrection)listViewEx.SelectedItems[0].Tag;
			if (selected.Id != 0) toBeRemoved.Add(selected);
            MeterEntity.Corrections.RemoveAt(removeItemNr);
			RefreshAll();

            if (removeItemNr < listViewEx.Items.Count)
            {
                listViewEx.Focus();
                listViewEx.Items[removeItemNr].Selected = true;
                listViewEx.Items[removeItemNr].EnsureVisible();
            }
            else
            {
                parent.UpdateButtonStates(SharedButtons.SelectedItemPos.None);
            }
        }

		public void MoveUpSelected()
		{
		}

		public void MoveDownSelected()
		{
		}

		/// <summary>
		/// Event handler that indicates the selected item position
		/// and updates 'Remove', 'Up' and 'Down' buttons in the parent dialog.
		/// </summary>
		private void listViewEx_SelectedIndexChanged(object sender, EventArgs e)
		{
			if (listViewEx.SelectedItems.Count != 1)
			{
				parent.UpdateButtonStates(SharedButtons.SelectedItemPos.None);
			}
			else if (listViewEx.Items.Count == 1)
			{
				parent.UpdateButtonStates(SharedButtons.SelectedItemPos.FirstAndLast);
			}
			else if (listViewEx.SelectedIndices[0] == 0)
			{
				parent.UpdateButtonStates(SharedButtons.SelectedItemPos.First);
			}
			else if (listViewEx.SelectedIndices[0] == (listViewEx.Items.Count - 1))
			{
				parent.UpdateButtonStates(SharedButtons.SelectedItemPos.Last);
			}
			else
			{
				parent.UpdateButtonStates(SharedButtons.SelectedItemPos.Middle);
			}
		}

		private void measuredTextBox_TextChanged(object sender, EventArgs e)
		{
			float measured;
			if (float.TryParse(measuredTextBox.Text,
							   NumberStyles.AllowDecimalPoint | NumberStyles.AllowLeadingSign | NumberStyles.AllowExponent,
							   CultureInfo.CurrentCulture,
							   out measured) ||
				float.TryParse(measuredTextBox.Text,
							   NumberStyles.AllowDecimalPoint | NumberStyles.AllowLeadingSign | NumberStyles.AllowExponent,
							   CultureInfo.InvariantCulture,
							   out measured))
			{
				double corrected = BenchControl.Formulas.CorrectedValue(measured, meterEntity.Corrections);
				correctedTextBox.Text = corrected.ToString();
			}
		}
	}
}