using System;
using System.Collections.Generic;
using System.Globalization;
using System.Windows.Forms;
using NHibernate;
using log4net;
using TBF.BenchControl;
using TBF.BenchControl.GenericDevices;
using TBF.Resources;

namespace TBF.UiControls
{
	public class ProceduresCtrl : BaseWithListViewEx<Entities.Procedure>, ITabWithListViewEx
	{
		static readonly ILog log = LogManager.GetLogger(typeof(ProceduresCtrl));

		/// <summary>
		/// ListViewEx columns
		/// </summary>
		enum Column
		{
			Name,
			Description,
			ColumnsCount,
		}
		readonly int columnsCount = (int)Column.ColumnsCount;

		ProceduresDlg parent;
		Control parentControl;
		Control[] editors;

		ISession session;

		public ProceduresCtrl()
			: base()
		{
			Name = "ProceduresCtrl";
		}

		public void Initialize(ProceduresDlg parent, Control parentControl)
		{
			this.parent = parent;
			this.parentControl = parentControl;

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

			/// ListViewEx columns
			Columns.Add(Strings.Name, 100 * parent.Dpi / PathsDlg.Dpi100pct);
			Columns.Add(Strings.DescriptionColHdr, 300 * parent.Dpi / PathsDlg.Dpi100pct);

			editors = new Control[columnsCount];
			///				
			editors[(int)Column.Name] = new TextBox();			/// Name
			editors[(int)Column.Description] = new TextBox();	/// Description
			///
			for (int i = 0; i < editors.Length; i++) parent.Controls.Add(editors[i]);

			ReloadAndRedrawAll();
		}

		void ReloadAndRedrawAll()
		{
			/// Load the procedures
			session = FluentCommon.CreateSession(Database.Procedures);
			MyItems = session.CreateQuery("FROM Procedure ORDER BY ItemNr")
							 .List<Entities.Procedure>();

			base.RedrawAll();
		}

		void listViewEx_SubItemClicked(object sender, SubItemEventArgs e)
		{
		}

		void listViewEx_SubItemEndEditing(object sender, SubItemEndEditingEventArgs e)
		{
		}

		public override void DrawOne(object myItem)
		{
			Entities.Procedure entity = (Entities.Procedure)myItem;

			ListViewItem lvi = new ListViewItem(entity.Name);
			lvi.SubItems.Add(entity.Description);
			lvi.Tag = entity;

			Items.Add(lvi);
		}

		public override void UpdateOne(ListViewItem lvi, object myItem)
		{
			Entities.Procedure entity = (Entities.Procedure)myItem;
			entity.Name = lvi.Text;
			entity.Description = lvi.SubItems[(int)Column.Description].Text;
		}

		/// <summary>
		/// Update the entities and save them to the database
		/// </summary>
		public new void OkBtnClicked()
		{
			base.OkBtnClicked();

			foreach (var entity in ToBeRemovedItems)
			{
				FluentCommon.DeleteFromDb(session, entity);
			}
			foreach (var entity in MyItems)
			{
				FluentCommon.SaveToDb(session, entity);
			}

			Program.MainWnd.ReloadProcedures();
		}

		public void AddOne()
		{
			/// Find an unused procedure name
			string newName;
			for (int nameId = 1; true; nameId++)
			{
				newName = Strings.New_procedure_name + nameId.ToString();
				bool notUsed = true;
				foreach (var t in MyItems) if (t.Name.Equals(newName)) notUsed = false;
				if (notUsed) break;
			}

			base.AddOne(new Entities.Procedure(newName, MyItems.Count + 1));
		}

		public new void RemoveSelected()
		{
			bool lastOneRemoved = base.RemoveSelected();
			if (lastOneRemoved && parent != null)
			{
				parent.UpdateButtonStates(SharedButtons.SelectedItemPos.None);
			}
		}

		public void editButton_Click(object sender, EventArgs e)
		{
			if (SelectedItems.Count != 1) return;
			int dbId = (SelectedItems[0].Tag as Entities.Procedure).Id;

			if (dbId == 0)
			{
				session.SaveOrUpdate(SelectedItems[0].Tag as Entities.Procedure);
			}

			dbId = (SelectedItems[0].Tag as Entities.Procedure).Id;

			///
			/// Entities.Procedure has to be loaded in a different session otherwise
			/// the database would be updated in case the dialog was closed with 'Cancel' button.
			/// 
			using (ISession editSession = FluentCommon.CreateSession(Database.Procedures))
			{
				IList<Entities.Procedure> procedure = editSession
					.CreateQuery("FROM Procedure WHERE Id = :id")
					.SetParameter("id", dbId)
					.List<Entities.Procedure>();
				if (procedure.Count != 1) return;

				ProcedureDlg dlg = new ProcedureDlg(procedure[0]);
				if (dlg.ShowDialog() == DialogResult.OK)
				{
                    parent.Unlock();
					using (var transaction = editSession.BeginTransaction())
					{
						editSession.SaveOrUpdate(procedure[0]);
						transaction.Commit();
					}
                    
				}
			}

			ReloadAndRedrawAll();
		}

		public void copyButton_Click(object sender, EventArgs e)
		{
			if (SelectedItems.Count != 1) return;

			Entities.Procedure selectedProcedure = (Entities.Procedure)SelectedItems[0].Tag;

			/// Make a copy of the selected procedure
			Entities.Procedure newProcedure = selectedProcedure.Clone();
			newProcedure.Name = selectedProcedure.Name + Strings.New_name_copy;
            newProcedure.ItemNr = MyItems.Count;
            newProcedure.CreationUser = Entities.User.CurrentUser.Name;
			newProcedure.CreationTime = DateTime.Now;

			if ((new ProcedureDlg(newProcedure)).ShowDialog() == DialogResult.OK)
			{
				using (var transaction = session.BeginTransaction())
				{
					session.SaveOrUpdate(newProcedure);
					transaction.Commit();
				}
				base.AddOne(newProcedure);
			}
		}
	}
}