///
/// Copyright (c) 2013-2017 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Windows.Forms;
using NHibernate;
using log4net;
using Config.Entities;
using Common.Forms;
using TBF.Rig;
using TBF.Rig.GenericDevices;
using TBF.Resources;
using TBF.UI.Shared;

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

		enum PathsDlgTabs
		{
			Feeding,
			Bench,
			Output,
			WaterMeters,
            HeatMeters,
		}

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

		public IList<Rig.Generic.IComponent> TbfComponents;
		public IList<IValve> Valves;
        public IList<IRegValve> FeedingRegulValves;
        public IList<IRegValve> OutputRegulValves;
        public ISession Session;			/// One common DB session passed also to the controls inside tab pages
        public IList<Procedure> Procedures;
        public IList<Test> Tests;

#if HEAT_METERS
        private System.Windows.Forms.TabPage heatMetersTabPage;
        private PathsHeatMetersCtrl pathsHeatMetersCtrl;
#endif

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

			InitializeComponent();

			/// SharedDlgButtons configuration
            sharedButtons.ParentForm = this;
            sharedButtons.RequiredGroupMembership = new Common.GID[] { Common.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
            try
            {
                TbfComponents = Rig.TbfComponents.LoadComponentsFromDB(TBF.DB.CreateSession(Common.DBKind.Config));
            }
            catch
            {
                TbfComponents = new List<Rig.Generic.IComponent>();
                MessageBox.Show("Error occured when loading components");
            }

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

            /// Find all feeding regulation valves
            FeedingRegulValves = new List<IRegValve>();
            OutputRegulValves = new List<IRegValve>(); 
            foreach (var cmpnt in TbfComponents)
            {
                IRegValve regValve = cmpnt as IRegValve;
                if (regValve != null && !(cmpnt is TBF.Rig.Elde.RegulValveTandem.RegulValveTandem))
                {
                    switch (regValve.Category)
                    {
                        case ValveCategory.Feeding:
                            FeedingRegulValves.Add(regValve);
                            break;
                        case ValveCategory.Output:
                            OutputRegulValves.Add(regValve);
                            break;
                    }
                }
            }

			/// Create the database session for paths
			Session = TBF.DB.CreateSession(Common.DBKind.Config);

            Procedures = Session.QueryOver<Procedure>().List();
            Tests = Session.QueryOver<Test>().List();

			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.WaterMeters].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.WaterMeters]);

#if HEAT_METERS
            this.heatMetersTabPage = new System.Windows.Forms.TabPage();
            this.pathsHeatMetersCtrl = new PathsHeatMetersCtrl();

            this.heatMetersTabPage.SuspendLayout();
            this.SuspendLayout();

            this.pathsTabControl.Controls.Add(this.heatMetersTabPage);
            // 
            // heatMetersTabPage
            // 
            this.heatMetersTabPage.Controls.Add(this.pathsHeatMetersCtrl);
            this.heatMetersTabPage.Name = "heatMetersTabPage";
            this.heatMetersTabPage.UseVisualStyleBackColor = true;
            // 
            // pathsHeatMetersCtrl
            // 
            this.pathsHeatMetersCtrl.DoubleClickActivation = false;
            this.pathsHeatMetersCtrl.FullRowSelect = true;
            this.pathsHeatMetersCtrl.GridLines = true;
            this.pathsHeatMetersCtrl.Name = "pathsHeatMetersCtrl";
            this.pathsHeatMetersCtrl.UseCompatibleStateImageBehavior = false;
            this.pathsHeatMetersCtrl.View = System.Windows.Forms.View.Details;
            this.pathsHeatMetersCtrl.SelectedIndexChanged += new System.EventHandler(this.SelectedIndexChanged);

            this.heatMetersTabPage.ResumeLayout(false);
            this.ResumeLayout(false);

            pathsTabControl.TabPages[(int)PathsDlgTabs.HeatMeters].Tag = pathsHeatMetersCtrl;

            // Requires 'Session' to be created
            pathsHeatMetersCtrl.Initialize(this, pathsTabControl.TabPages[(int)PathsDlgTabs.HeatMeters]);
#endif
		}

		private void PathsDlg_Load(object sender, EventArgs e)
		{
			Localize();
            LoadUISettings();
        }

		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.WaterMeters].Text = Strings.MetersTabPageTitle;
#if HEAT_METERS
            pathsTabControl.TabPages[(int)PathsDlgTabs.HeatMeters].Text = Strings.Heat_meter_sensors;       /// Localization
#endif
        }

		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)
		{
			string warnings = string.Empty;
			Dictionary<string, string>[] renameInfo = new Dictionary<string, string>[pathsTabControl.TabPages.Count];

			for (int i = 0; i < pathsTabControl.TabPages.Count; i++)
			{
                TabPage tab = pathsTabControl.TabPages[i];
                renameInfo[i] = new Dictionary<string, string>();
				if (tab.Tag is ITabWithListViewEx)
				{
					warnings += (tab.Tag as ITabWithListViewEx).GetWarningsBeforeSaving(ref renameInfo[i]);
				}
			}

			bool updateRelatedItems = false;
			if (!string.IsNullOrEmpty(warnings))
			{
                string message = string.Format("{0}{1}{2}", warnings, Environment.NewLine,
											   Strings.Do_you_want_to_update_related_tests_and_procedures);
				DialogResult dr = MessageBox.Show(message, Strings.Warning, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Exclamation);
                if (dr == DialogResult.Cancel)
                {
                    DialogResult = DialogResult.Cancel;
                    return;
                }
				else if (dr == DialogResult.Yes)
				{
					updateRelatedItems = true;
                }
			}

            Cursor.Current = Cursors.WaitCursor;

			using (var transaction = Session.BeginTransaction())
			{
				try
				{
					if (updateRelatedItems)
					{
						for (int i = 0; i < pathsTabControl.TabPages.Count; i++)
						{
							TabPage tab = pathsTabControl.TabPages[i];
							if (tab.Tag is ITabWithListViewEx) (tab.Tag as ITabWithListViewEx).UpdateRelatedItems(renameInfo[i]);
						}
					}

					foreach (TabPage tab in pathsTabControl.TabPages)
					{
						(tab.Tag as ITabWithListViewEx).OkBtnClicked();
					}

					transaction.Commit();
				}
				catch (Exception exc)
				{
					transaction.Rollback();
					Cursor.Current = Cursors.Default;

					MessageBox.Show(Strings.Cannot_save_changes, Strings.Error, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
					log.ErrorFormat("Update of paths in the database failed: {0}", exc.Message);
				}
			}

            Cursor.Current = Cursors.Default;

            SaveUISettings();
            DialogResult = DialogResult.OK;
			Close();
		}

		private void cancelButton_Click(object sender, EventArgs e)
		{
            foreach (TabPage tab in pathsTabControl.TabPages)
			{
				(tab.Tag as ITabWithListViewEx).CancelBtnClicked();
			}
            SaveUISettings();
            DialogResult = DialogResult.Cancel;
			Close();
		}

        private void SaveUISettings()
        {
            /// Obtain PathsDlg dimensions, etc.
            bool isMaximized = (WindowState == FormWindowState.Maximized);
            int left = (WindowState == FormWindowState.Normal) ? Location.X : RestoreBounds.Left;
            int top = (WindowState == FormWindowState.Normal) ? Location.Y : RestoreBounds.Top;
            int width = (WindowState == FormWindowState.Normal) ? Size.Width : RestoreBounds.Width;
            int height = (WindowState == FormWindowState.Normal) ? Size.Height : RestoreBounds.Height;

            LocalSettings ls = Program.LocalSettings;

            if (ls != null && (ls.PathsDlgMaximized != isMaximized ||
                               ls.PathsDlgLeft != left ||
                               ls.PathsDlgTop != top ||
                               ls.PathsDlgWidth != width ||
                               ls.PathsDlgHeight != height))
            {
                /// At least one PathsDlg dimension differs => Update local settings and save them
                ls.PathsDlgMaximized = isMaximized;
                ls.PathsDlgLeft = left;
                ls.PathsDlgTop = top;
                ls.PathsDlgWidth = width;
                ls.PathsDlgHeight = height;
                ls.Save();
            }
        }

        private void LoadUISettings()
        {
            TBF.LocalSettings ls = Program.LocalSettings;
            WindowState = (ls.PathsDlgMaximized ? FormWindowState.Maximized : FormWindowState.Normal);
            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 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);
			}
		}

        private void PathsDlg_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (Users.CurrentUser.Restore(this)) Program.MainWnd.UpdateUser();
        }
	}
}