///
/// Copyright (c) 2016-2022 Sensus Slovensko a.s.
///
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using log4net;
using Common.Forms;
using SharedDatabase.Entities;
using ProductionTracing.Resources;

namespace ProductionTracing.Forms
{
	public partial class TracingConfigDlg : Form
	{
        /// <summary>
        /// ListViewEx columns
        /// </summary>
        enum Column
        {
            Item,
            Caption,
            Format,
            Precision,
            Width,
            Count,
        }
        Control[] editors;
        

        public IList<ItemSpec> AvailableItems;
        public IList<ItemSpec> SelectedItems;


		public bool Compound;			/// false = single meter items, true = combined meter items

		public TracingConfigDlg()
		{
			InitializeComponent();
		}

		void Localize()
		{
			Text = Strings.Configuration;
			availableResultsLabel.Text = Strings.Available_results;
			selectedResultsLabel.Text = Strings.Selected_results;
			addButton.Text = Strings.Add;
			removeButton.Text = Strings.Remove;
			removeAllButton.Text = Strings.Remove_all;
			okButton.Text = Strings.OkBtnText;
			cancelButton.Text = Strings.Cancel;
            upButton.Text = Strings.UpBtnText;
            downButton.Text = Strings.DownBtnText;
		}

		void ResultsConfig_Load(object sender, EventArgs e)
		{
			Localize();

            /// Add columns to ListViewEx
            selectedResultsListViewEx.Columns.Add(new ColumnHeader { Text = Strings.Item, Width = 120 });
            selectedResultsListViewEx.Columns.Add(new ColumnHeader { Text = Strings.Caption });
            selectedResultsListViewEx.Columns.Add(new ColumnHeader { Text = Strings.Format });
            selectedResultsListViewEx.Columns.Add(new ColumnHeader { Text = Strings.Precision });
            selectedResultsListViewEx.Columns.Add(new ColumnHeader { Text = Strings.Width });

            editors = new Control[]
                {
                    null,
                    new TextBox(),
                    new TextBox(),
                    new TextBox(),
                    new TextBox(),
                };
            foreach (var edi in editors)
            {
                if (edi != null)
                {
                    edi.Visible = false;
                    Controls.Add(edi);
                }
            }

            selectedResultsListViewEx.SubItemClicked += new SubItemEventHandler(selectedResultsListViewEx_SubItemClicked);
            selectedResultsListViewEx.SubItemEndEditing += new SubItemEndEditingEventHandler(selectedResultsListViewEx_SubItemEndEditing);
			
            RedrawAvailable();
			RedrawSelected();
		}

        void selectedResultsListViewEx_SubItemClicked(object sender, SubItemEventArgs e)
        {
            if ((e.SubItem > 0) && (e.SubItem < (int)Column.Count))
            {
                selectedResultsListViewEx.StartEditing(editors[e.SubItem], e.Item, e.SubItem);
            }
        }

        void selectedResultsListViewEx_SubItemEndEditing(object sender, SubItemEndEditingEventArgs e)
        {
            ListViewItem lvi = e.Item;
            ItemSpec item = lvi.Tag as ItemSpec;

            switch ((Column)e.SubItem)
            {
                case Column.Caption:    item.Caption = e.DisplayText;   return;
                case Column.Format:     item.Format = e.DisplayText;    return;
                case Column.Precision:  item.Precision = e.DisplayText; return;
                                    
                case Column.Width:
                    {
                        int width;
                        if (Int32.TryParse(editors[e.SubItem].Text, out width) && width >= 0)
                        {
                            item.Width = width;
                            return;     /// OK
                        }
                        break;          /// Error
                    }
                default:
                    return;             /// OK
            }

            e.DisplayText = e.Item.SubItems[e.SubItem].Text;
            e.Cancel = true;
            return;
        }

		/// <summary>
		/// Redraw selected items (right hand side)
		/// </summary>
		void RedrawAvailable()
		{
			availableResultsListBox.Items.Clear();
            AvailableItems = new List<ItemSpec>();
            foreach (var item in ItemSpec.AllItems)
			{
				AvailableItems.Add(item);
				availableResultsListBox.Items.Add(item.Name);
			}
		}

		/// <summary>
		/// Redraw selected items (right hand side)
		/// </summary>
		void RedrawSelected()
		{
			selectedResultsListViewEx.Items.Clear();
			foreach (var item in SelectedItems)
			{
                ListViewItem lvi = new ListViewItem(item.Name);                                     /// Item
                lvi.Tag = item;
                lvi.SubItems.Add(item.Caption);                                                     /// Header
                lvi.SubItems.Add(item.Format);                                                      /// Format
                lvi.SubItems.Add(item.Precision);                                                   /// Precision
                lvi.SubItems.Add(item.Width.ToString());                                            /// Width

				selectedResultsListViewEx.Items.Add(lvi);
			}
		}

        void UpdateSelectedFromView()
        {
        }

		void availableResultsListBox_DoubleClick(object sender, EventArgs e)
		{
			/// Double click works when just one item is selected
			if (availableResultsListBox.SelectedIndices.Count == 1)
			{
				var oriItem = AvailableItems[availableResultsListBox.SelectedIndices[0]];
                SelectedItems.Add(oriItem.Clone());
				RedrawAvailable();
				RedrawSelected();

                /// Select the last item
                selectedResultsListViewEx.Focus();
                selectedResultsListViewEx.Items[SelectedItems.Count - 1].Selected = true;
                selectedResultsListViewEx.Items[SelectedItems.Count - 1].EnsureVisible();
            }
		}

		void addButton_Click(object sender, EventArgs e)
		{
			/// Append at the end, this code supports multiple selected items,
			/// although ListBox control settings may limit the max.number of selected items to one.

			for (int i = availableResultsListBox.SelectedIndices.Count - 1; i >= 0; i--)
			{
                var oriItem = AvailableItems[availableResultsListBox.SelectedIndices[i]];
                SelectedItems.Add(oriItem.Clone());
			}
			RedrawAvailable();
			RedrawSelected();

            /// Select the last item
            selectedResultsListViewEx.Focus();
            selectedResultsListViewEx.Items[SelectedItems.Count - 1].Selected = true;
            selectedResultsListViewEx.Items[SelectedItems.Count - 1].EnsureVisible();
        }

		private void selectedResultsListBox_DoubleClick(object sender, EventArgs e)
		{
			/// Double click works when just one item is selected

			if (selectedResultsListViewEx.SelectedIndices.Count == 1)
			{
				SelectedItems.RemoveAt(selectedResultsListViewEx.SelectedIndices[0]);
				RedrawAvailable();
				RedrawSelected();
			}
		}

		void removeButton_Click(object sender, EventArgs e)
		{
			/// Remove from the list (the last selected item first so that the indexes are not affected)

			for (int i = selectedResultsListViewEx.SelectedIndices.Count - 1; i >= 0; i--)
			{
				SelectedItems.RemoveAt(selectedResultsListViewEx.SelectedIndices[i]);
			}
			RedrawAvailable();
			RedrawSelected();
		}

		void removeAllButton_Click(object sender, EventArgs e)
		{
			/// Remove all items from 'Selected' list

			SelectedItems.Clear();
			RedrawAvailable();
			RedrawSelected();
		}

		void okButton_Click(object sender, EventArgs e)
		{
            DialogResult = DialogResult.OK;
			Close();
		}

        private void ResultsConfigDlg_KeyPress(object sender, KeyPressEventArgs e)
        {
            e.Handled = true;
        }

        private void upButton_Click(object sender, EventArgs e)
        {
            if (selectedResultsListViewEx.SelectedIndices.Count != 1) return;

            int selIdx = selectedResultsListViewEx.SelectedIndices[0];
            if (selIdx == 0)
            {
                /// Cannot move up
                selectedResultsListViewEx.Focus();
                selectedResultsListViewEx.Items[0].Selected = true;
                return;
            }

            ItemSpec tmp = SelectedItems[selIdx - 1];
            SelectedItems[selIdx - 1] = SelectedItems[selIdx];
            SelectedItems[selIdx] = tmp;

            RedrawSelected();

            selectedResultsListViewEx.Focus();
            selectedResultsListViewEx.Items[selIdx - 1].Selected = true;
            selectedResultsListViewEx.Items[selIdx - 1].EnsureVisible();
        }

        private void downButton_Click(object sender, EventArgs e)
        {
            if (selectedResultsListViewEx.SelectedIndices.Count != 1) return;

            int selIdx = selectedResultsListViewEx.SelectedIndices[0];
            if (selIdx == SelectedItems.Count - 1)
            {
                /// Cannot move down
                selectedResultsListViewEx.Focus();
                selectedResultsListViewEx.Items[SelectedItems.Count - 1].Selected = true;
                return;
            }

            ItemSpec tmp = SelectedItems[selIdx + 1];
            SelectedItems[selIdx + 1] = SelectedItems[selIdx];
            SelectedItems[selIdx] = tmp;
            
            RedrawSelected();

            selectedResultsListViewEx.Focus();
            selectedResultsListViewEx.Items[selIdx + 1].Selected = true;
            selectedResultsListViewEx.Items[selIdx + 1].EnsureVisible();
        }

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