using System;
using System.Collections.Generic;
using System.Windows.Forms;
using log4net;

using TBF.BenchControl;
using TBF.BenchControl.Generic;
using TBF.Entities;
using TBF.Resources;
using TBF.UiControls;

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

		/// <summary>
		/// List of components (=component configuration instances)
		/// </summary>
		IList<Entities.Component> cmpntEntities;

		IList<Entities.Component> toBeDeletedEntities;

		NHibernate.ISession session;

		SelectComponentClassDlg selectComponentTypeDlg;	/// Constructed once, the selection is kept between dialog usages											

        /// <summary>
        /// ListViewEx columns
        /// </summary>
        enum Column
        {
            Name,
            ClassName,
            ParentName,
            DebugMode,
            Logging,
            Parameters,
            ColumnsCount,
        }

		/// Editors used by listViewEx
        ComboBox debugCB;
        ComboBox logCB;

		bool unlocked;

		public ComponentsManagerDlg()
		{
			toBeDeletedEntities = new List<Entities.Component>();

			InitializeComponent();

			selectComponentTypeDlg = new SelectComponentClassDlg();

			/// SharedDlgButtons configuration
			sharedButtons.RequiredGroupMembership = Grp.GID.Metrologists;
			sharedButtons.OptionalButtons = SharedButtons.Buttons.Add    |
											SharedButtons.Buttons.Remove |
										  //SharedButtons.Buttons.Up     |
										  //SharedButtons.Buttons.Down   |
											SharedButtons.Buttons.Edit;
			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;
			sharedButtons.EditClicked += editButton_Click;
		}

		private void ComponentsManagerDlg_Load(object sender, EventArgs e)
		{
            TBF.LocalSettings ls = Program.LocalSettings;
            Width  = (ls.ComponentsDlgWidth > 0)  ? ls.ComponentsDlgWidth  : 850;
            Height = (ls.ComponentsDlgHeight > 0) ? ls.ComponentsDlgHeight : 500;
            Left   = (ls.ComponentsDlgLeft != 0)  ? ls.ComponentsDlgLeft   : 200;
            Top    = (ls.ComponentsDlgTop != 0)   ? ls.ComponentsDlgTop    : 100;

            Text = Strings.Test_Bench_Components_Configuration;
			listViewEx.Columns.Add(Strings.Name, 80);
			listViewEx.Columns.Add(Strings.Type, 120);
			listViewEx.Columns.Add(Strings.Parent, 55);
			listViewEx.Columns.Add(Strings.Mode, 55);
			listViewEx.Columns.Add(Strings.Logging, 55);
			listViewEx.Columns.Add(Strings.Parameters, 600);

			debugCB = new ComboBox();
            for (DebugMode level = 0; level < DebugMode.Count; level++) debugCB.Items.Add(level.ToString());
            splitContainer.Panel1.Controls.Add(debugCB);

            logCB = new ComboBox();
            for (LogLevel level = 0; level < LogLevel.Count; level++) logCB.Items.Add(level.ToString());
            splitContainer.Panel1.Controls.Add(logCB);

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

			sharedButtons.DisableButtons(UiControls.SharedButtons.Buttons.Remove | UiControls.SharedButtons.Buttons.Edit);

			session = FluentCommon.CreateSession(Database.Bench);
			cmpntEntities = session
				.CreateQuery("FROM Component ORDER BY ItemNr")
				.List<Entities.Component>();

			RedrawAll();
		}

        void listViewEx_SubItemClicked(object sender, SubItemEventArgs e)
        {
			if (unlocked && e.SubItem == (int)Column.DebugMode)
            {
                listViewEx.StartEditing(debugCB, e.Item, e.SubItem);
            }
			else if (unlocked && e.SubItem == (int)Column.Logging)
            {
                listViewEx.StartEditing(logCB, e.Item, e.SubItem);
            }
        }

        void listViewEx_SubItemEndEditing(object sender, SubItemEndEditingEventArgs e)
        {
            Entities.Component cmpnt = (Entities.Component)e.Item.Tag;

            if (e.SubItem == (int)Column.DebugMode)
            {
                for (DebugMode level = 0; level < DebugMode.Count; level++)
                {
                    if (debugCB.Text.Equals(level.ToString()))
                    {
                        cmpnt.Mode = level;
                        return;
                    }
                }
                e.DisplayText = cmpnt.Mode.ToString();
            }
            else if (e.SubItem == (int)Column.Logging)
            {
                for (LogLevel level = 0; level < LogLevel.Count; level++)
                {
                    if (logCB.Text.Equals(level.ToString()))
                    {
                        cmpnt.Logging = level;
                        return;
                    }
                }
                e.DisplayText = cmpnt.Logging.ToString();
            }
        }

		private void Unlocked(object sender, EventArgs e)
		{
			unlocked = true;
		}

		void RedrawAll()
		{
			listViewEx.Items.Clear();
			foreach (var cmpnt in cmpntEntities) DrawOne(cmpnt);
		}

		void DrawOne(Entities.Component cmpnt)
		{
			IComponentCfg cmpCfg = TbfComponents.CmpntCfgFromCmpntEntity(cmpnt);

            if (cmpCfg != null)
            {
                ListViewItem lvi = new ListViewItem(cmpCfg.Name);
                lvi.SubItems.Add(cmpCfg.Factory.ClassName);
                lvi.SubItems.Add(cmpCfg.ParentName);
                lvi.SubItems.Add(cmpCfg.DebugLevel.ToString());
                lvi.SubItems.Add(cmpCfg.LogLevel.ToString());
                lvi.SubItems.Add(cmpCfg.ToString(1));

                lvi.Tag = cmpnt;

                listViewEx.Items.Add(lvi);
            }
		}

		/// OK
		private void okButton_Click(object sender, EventArgs e)
		{
			foreach (var cmpnt in toBeDeletedEntities)
			{
				FluentCommon.DeleteFromDb(session, cmpnt);
			}
			foreach (var cmpnt in cmpntEntities)
			{
				FluentCommon.SaveToDb(session, cmpnt);
			}

            Program.LocalSettings.ComponentsDlgLeft = Location.X;
            Program.LocalSettings.ComponentsDlgTop = Location.Y;
            Program.LocalSettings.ComponentsDlgWidth = Size.Width;
            Program.LocalSettings.ComponentsDlgHeight = Size.Height;
            Program.LocalSettings.Save();

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

		/// Cancel
		private void cancelButton_Click(object sender, EventArgs e)
		{
            Program.LocalSettings.ComponentsDlgLeft = Location.X;
            Program.LocalSettings.ComponentsDlgTop = Location.Y;
            Program.LocalSettings.ComponentsDlgWidth = Size.Width;
            Program.LocalSettings.ComponentsDlgHeight = Size.Height;
            Program.LocalSettings.Save();

            DialogResult = DialogResult.Cancel;
			Close();
			return;
		}

		/// Add a new component
		private void addButton_Click(object sender, EventArgs e)
		{
			DialogResult dr = selectComponentTypeDlg.ShowDialog();
			if (dr != DialogResult.OK) return;

			IComponentFactory factory = selectComponentTypeDlg.SlctdCmpntFactory;
			IComponentCfg cfg = factory.DefaultConfig();
			IComponentCfgCtrl cfgControl = cfg.GetControl();
			cfgControl.Config = cfg;
            cfgControl.Config.ItemNr = listViewEx.Items.Count;

			ComponentParametersDlg cfgForm = new ComponentParametersDlg();
			cfgForm.TbfComponents = cmpntEntities;
			cfgForm.ComponentCfgCtrl = cfgControl;
			dr = cfgForm.ShowDialog();
			if (dr != DialogResult.OK) return;

			AddOne(cfgForm.Config.CreateDbEntity());
		}

		void AddOne(Entities.Component cmpnt)
		{
			cmpntEntities.Add(cmpnt);
			DrawOne(cmpnt);
		}

		/// Delete the component
		private void removeButton_Click(object sender, EventArgs e)
		{
			if (listViewEx.SelectedIndices.Count != 1) return;
			int ix = listViewEx.SelectedIndices[0];
			if (ix < 0) return;
			
			Entities.Component selectedCmpnt = (Entities.Component)listViewEx.Items[ix].Tag;
			if (selectedCmpnt.Id != 0) toBeDeletedEntities.Add(selectedCmpnt);
			listViewEx.Items.RemoveAt(ix);
			RedrawAll();
		}

		/// DoubleClick -> Edit the component
		private void listViewEx_MouseDoubleClick(object sender, MouseEventArgs e)
		{
			editButton_Click(sender, e);
		}

		/// Edit the component
		private void editButton_Click(object sender, EventArgs e)
		{
            if (listViewEx.SelectedIndices.Count != 1) return;
            ListViewItem lvi = listViewEx.SelectedItems[0];

			ComponentParametersDlg cfgForm = new ComponentParametersDlg();
			cfgForm.TbfComponents = cmpntEntities;
			IComponentCfg cfg = TbfComponents.CmpntCfgFromCmpntEntity((Entities.Component)lvi.Tag);
			cfgForm.ComponentCfgCtrl = cfg.GetControl();
			cfgForm.ComponentCfgCtrl.Config = cfg;
			DialogResult dr = cfgForm.ShowDialog();
			if (dr != DialogResult.OK) return;

            sharedButtons.UnlockButtons();      /// Unlock this dialog buttons as changes were enabled
            unlocked = true;                    /// in the ComponentParametersDlg.

			Entities.Component modified = cfgForm.Config.CreateDbEntity();
			Entities.Component original = (Entities.Component)lvi.Tag;

			original.Name = modified.Name;
			original.ClassName = modified.ClassName;
			original.ParentName = modified.ParentName;
			original.Mode = modified.Mode;
			original.Logging = modified.Logging;
			original.Parameters = modified.Parameters;

			RedrawAll();
		}

		private void componentsListView_SelectedIndexChanged(object sender, EventArgs e)
		{
			if (listViewEx.SelectedIndices.Count == 1)
			{
				sharedButtons.EnableButtons(UiControls.SharedButtons.Buttons.Remove | UiControls.SharedButtons.Buttons.Edit);
			}
			else
			{
				sharedButtons.DisableButtons(UiControls.SharedButtons.Buttons.Remove | UiControls.SharedButtons.Buttons.Edit);
			}
		}

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