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

namespace TBF
{
	public partial class PathsDlg : Form, IParentOfListViewEx
	{
		static readonly ILog log = LogManager.GetLogger(typeof(PathsDlg));

		enum PathsDlgTabs
		{
			Feeding,
			Bench,
			Output,
			Meters,
		}

		/// Used when re-scaling the dialog: 100% = 96dpi, 125% = 120dpi, 150% = 144dpi
		public readonly int Dpi;
		public const int Dpi100pct = 96;

		public IList<BenchControl.Generic.IComponent> TbfComponents;
		public IList<IValve> Valves;
		public ISession Session;			/// One common DB session passed also to the controls inside tab pages

		public PathsDlg()
		{
			/// Detect display setting: 100% = 96dpi, 125% = 120dpi, 150% = 144dpi.
			Dpi = (int)this.CreateGraphics().DpiX;

			InitializeComponent();

			/// SharedDlgButtons configuration
			sharedButtons.RequiredGroupMembership = Config.Grp.GID.Metrologists;
			sharedButtons.OptionalButtons = SharedButtons.Buttons.Add | SharedButtons.Buttons.Remove |
											SharedButtons.Buttons.Up | SharedButtons.Buttons.Down;
			sharedButtons.Unlocked += Unlocked;
			sharedButtons.OKClicked += okButton_Click;
			sharedButtons.CancelClicked += cancelButton_Click;
			sharedButtons.AddClicked += addButton_Click;
			sharedButtons.RemoveClicked += removeButton_Click;
			sharedButtons.UpClicked += upButton_Click;
			sharedButtons.DownClicked += downButton_Click;

			/// Load the list of components from the database
			TbfComponents = BenchControl.TbfComponents.LoadComponentsFromDB(Config.FluentCommon.CreateSession(Config.Entities.DBKind.Config));

			/// Find all master valves
			Valves = BenchControl.GenericDevices.ValveBase.MasterValves(TbfComponents);

			/// Create the database session for paths
			Session = Config.FluentCommon.CreateSession(Config.Entities.DBKind.Config);

			pathsTabControl.TabPages[(int)PathsDlgTabs.Feeding].Tag = pathsFeedingCtrl;
			pathsTabControl.TabPages[(int)PathsDlgTabs.Bench].Tag = pathsBenchCtrl;
			pathsTabControl.TabPages[(int)PathsDlgTabs.Output].Tag = pathsOutputCtrl;
			pathsTabControl.TabPages[(int)PathsDlgTabs.Meters].Tag = pathsMetersCtrl;

			// Requires 'Session' to be created
			pathsFeedingCtrl.Initialize(this, pathsTabControl.TabPages[(int)PathsDlgTabs.Feeding]);
			pathsBenchCtrl.Initialize(this, pathsTabControl.TabPages[(int)PathsDlgTabs.Bench]);
			pathsOutputCtrl.Initialize(this, pathsTabControl.TabPages[(int)PathsDlgTabs.Output]);
			pathsMetersCtrl.Initialize(this, pathsTabControl.TabPages[(int)PathsDlgTabs.Meters]);
        }

		private void PathsDlg_Load(object sender, EventArgs e)
		{
			Localize();
            TBF.LocalSettings ls = Program.LocalSettings;
            Width  = (ls.PathsDlgWidth > 0)  ? ls.PathsDlgWidth  : 1050;
            Height = (ls.PathsDlgHeight > 0) ? ls.PathsDlgHeight : 360;
            Left   = (ls.PathsDlgLeft != 0)  ? ls.PathsDlgLeft   : 150;
            Top    = (ls.PathsDlgTop != 0)   ? ls.PathsDlgTop    : 150;
        }

		private void Localize()
		{
			Text = Strings.PathsDlgTitle;
			pathsTabControl.TabPages[(int)PathsDlgTabs.Feeding].Text = Strings.FeedingTabPageTitle;
			pathsTabControl.TabPages[(int)PathsDlgTabs.Bench].Text = Strings.BenchTabPageTitle;
			pathsTabControl.TabPages[(int)PathsDlgTabs.Output].Text = Strings.OutputTabPageTitle;
			pathsTabControl.TabPages[(int)PathsDlgTabs.Meters].Text = Strings.MetersTabPageTitle;
		}

		private void Unlocked(object sender, EventArgs e)
		{
			foreach (TabPage tab in pathsTabControl.TabPages)
			{
				(tab.Tag as ITabWithListViewEx).Unlock();
			}
		}

		private void okButton_Click(object sender, EventArgs e)
		{
			foreach (TabPage tab in pathsTabControl.TabPages)
			{
				(tab.Tag as ITabWithListViewEx).OkBtnClicked();
			}

            Program.LocalSettings.PathsDlgLeft = Location.X;
            Program.LocalSettings.PathsDlgTop = Location.Y;
            Program.LocalSettings.PathsDlgWidth = Size.Width;
            Program.LocalSettings.PathsDlgHeight = Size.Height;
            Program.LocalSettings.Save();

            DialogResult = DialogResult.OK;
			Close();
		}

		private void cancelButton_Click(object sender, EventArgs e)
		{
            Program.LocalSettings.PathsDlgLeft = Location.X;
            Program.LocalSettings.PathsDlgTop = Location.Y;
            Program.LocalSettings.PathsDlgWidth = Size.Width;
            Program.LocalSettings.PathsDlgHeight = Size.Height;
            Program.LocalSettings.Save();

            foreach (TabPage tab in pathsTabControl.TabPages)
			{
				(tab.Tag as ITabWithListViewEx).CancelBtnClicked();
			}
			DialogResult = DialogResult.Cancel;
			Close();
		}

		private void addButton_Click(object sender, EventArgs e)
		{
			(pathsTabControl.SelectedTab.Tag as ITabWithListViewEx).AddOne();
		}

		private void removeButton_Click(object sender, EventArgs e)
		{
			(pathsTabControl.SelectedTab.Tag as ITabWithListViewEx).RemoveSelected();
		}

		private void upButton_Click(object sender, EventArgs e)
		{
			(pathsTabControl.SelectedTab.Tag as ITabWithListViewEx).MoveUpSelected();
		}

		private void downButton_Click(object sender, EventArgs e)
		{
			(pathsTabControl.SelectedTab.Tag as ITabWithListViewEx).MoveDownSelected();
		}

		/// <summary>
		/// Common part for three xxxListViewEx_SelectedIndexChanged event handlers
		/// </summary>
		/// <param name="listViewEx"></param>
		void SelectedIndexChanged(object sender, EventArgs e)
		{
			ListViewEx listViewEx = sender as ListViewEx;
			if (listViewEx.SelectedItems.Count != 1)
			{
				/// No item selected
				sharedButtons.DisableButtons(SharedButtons.Buttons.Remove | SharedButtons.Buttons.Up | SharedButtons.Buttons.Down);
			}
			else if (listViewEx.Items.Count == 1)
			{
				/// One (the first and the last) item selected
				sharedButtons.EnableButtons(SharedButtons.Buttons.Remove);
				sharedButtons.DisableButtons(SharedButtons.Buttons.Up | SharedButtons.Buttons.Down);
			}
			else if (listViewEx.SelectedIndices[0] == 0)
			{
				/// The first of many items selected
				sharedButtons.EnableButtons(SharedButtons.Buttons.Remove | SharedButtons.Buttons.Down);
				sharedButtons.DisableButtons(SharedButtons.Buttons.Up);
			}
			else if (listViewEx.SelectedIndices[0] == (listViewEx.Items.Count - 1))
			{
				/// The last of many items selected
				sharedButtons.EnableButtons(SharedButtons.Buttons.Remove | SharedButtons.Buttons.Up);
				sharedButtons.DisableButtons(SharedButtons.Buttons.Down);
			}
			else
			{
				/// One of middle items selected
				sharedButtons.EnableButtons(SharedButtons.Buttons.Remove | SharedButtons.Buttons.Up | SharedButtons.Buttons.Down);
			}
		}

		/// <summary>
		/// Tab page changed - item is unselected
		/// </summary>
		private void pathsTabControl_SelectedIndexChanged(object sender, EventArgs e)
		{
			UpdateButtonStates(SharedButtons.SelectedItemPos.None);
		}

		public void UpdateButtonStates(SharedButtons.SelectedItemPos selectedItemPos)
		{
			if (selectedItemPos == SharedButtons.SelectedItemPos.None)
			{
				sharedButtons.DisableButtons(SharedButtons.Buttons.Remove | SharedButtons.Buttons.Up | SharedButtons.Buttons.Down);
			}
		}
	}
}