using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using VEPROMS.CSLA.Library;
using Volian.Base.Library;

namespace Volian.Controls.Library
{
	public partial class AnnotationDetails : UserControl
	{
		private static readonly log4net.ILog _MyLog = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
		#region Properties
        private bool _LoadingAnnotation = false;
        private bool _LoadingGrid = false;

        private ItemInfo _CurrentItem = null;
        private DisplaySearch _AnnotationSearch;

		private AnnotationInfoList _Annotations;
		public AnnotationInfoList Annotations
		{
			get { return _Annotations; }
			set 
			{ 
				_Annotations = value;
				itemAnnotationsBindingSource.DataSource = _Annotations;
			}
		}

		private AnnotationInfo _CurrentAnnotation = null;
		public AnnotationInfo CurrentAnnotation
		{
			get { return _CurrentAnnotation; }
			set
			{
				if (_CurrentAnnotation == null && value == null) return; // No Change
				if (_CurrentAnnotation != null && value != null)
					if (_CurrentAnnotation.AnnotationID == value.AnnotationID) return; // No Change
				//vlnStackTrace.ShowStack("CurrentAnnotation = '{0}' Old = '{1}'", value, _CurrentAnnotation);
				if (_CurrentAnnotation != null || _AddingAnnotation)
				{
					if (AnnotationDirty)
						SaveAnnotation();
				}
				_CurrentAnnotation = value;
				InitializeAnnotation();
            }
		}

		private bool _AnnotationDirty = false;
		private bool AnnotationDirty
		{
			get { return _AnnotationDirty; }
			set
			{
				btnRemoveAnnotation.Enabled = btnAddAnnotation.Enabled = !value;
				btnSaveAnnotation.Enabled = btnCancelAnnoation.Enabled = value;
				_AddingAnnotation = value && (CurrentAnnotation == null);
				_AnnotationDirty = value;
			}
		}

		public string AnnotationText
		{
			get { return rtxbComment.Text; }
			set
			{
				rtxbComment.Text = value;
				if (rtxbComment.Text != string.Empty)
					rtxbComment.SelectionStart = rtxbComment.TextLength; // position cursor to end of text
			}
		}

		public string AnnotationRTFText
		{
			get { return rtxbComment.Rtf; }
			set
			{
				rtxbComment.Rtf = value;
				if (rtxbComment.Rtf != string.Empty)
					rtxbComment.SelectionStart = rtxbComment.TextLength; // position cursor to end of text
			}
		}
		private UserInfo _MyUserInfo;
		public UserInfo MyUserInfo
		{
			get { return _MyUserInfo; }
			set { _MyUserInfo = value; }
		}
		#endregion

		#region Constructors
		public AnnotationDetails()
		{
			InitializeComponent();
//#if(DEBUG)
			//Resize+=new EventHandler(AnnotationDetails_Resize); // Debug the resize event
//#endif
			Resize += AnnotationDetails_Resize;
		}

		void AnnotationDetails_Resize(object sender, EventArgs e)
		{
			if(Height > 0)
				rtxbComment.Height = Height - rtxbComment.Top;
		}
		#endregion

		#region Events
		private bool _AddingAnnotation = false;
		private void btnAddAnnotation_Click(object sender, EventArgs e)
		{
            dgAnnotations.ClearSelection();
			CurrentAnnotation = null;
			_AddingAnnotation = true;
            rtxbComment.Focus();
		}

		private void btnRemoveAnnotation_Click(object sender, EventArgs e)
		{
			//using (Annotation annotation = CurrentAnnotation.Get())
			//{
//				annotation.Delete();
				_AnnotationSearch.LoadingList = true;
				Annotation.DeleteAnnotation(CurrentAnnotation);
//				annotation.Save();
				_AnnotationSearch.LoadingList = false;
				CurrentAnnotation = null;
				UpdateAnnotationGrid();
                //_AnnotationSearch.UpdateAnnotationSearchResults(); // update the search results
			//}
		}

		private void btnSaveAnnotation_Click(object sender, EventArgs e)
		{
			if (cbGridAnnoType.SelectedIndex == -1)
			{
				MessageBox.Show("You Must Select an Annotation Type", "Annotation Type Not Selected", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
				cbGridAnnoType.Focus();
				return;
			}
			if (rtxbComment.Text == string.Empty)
			{
				MessageBox.Show("You Must Enter Annotation Text", "Annotation Text Is Blank", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
				rtxbComment.Focus();
				return;
			}
			SaveAnnotation();

		}

		private void btnCancelAnnoation_Click(object sender, EventArgs e)
		{
			InitializeAnnotation();
		}

		private void cbGridAnnoType_SelectedValueChanged(object sender, EventArgs e)
		{
			if (!_LoadingAnnotation)
				AnnotationDirty = true;
		}

        private void dgAnnotations_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (!_LoadingGrid) // Only set the Current Annotation when not loading the grid
            {
                if ((_Annotations != null) && (dgAnnotations.Rows.Count > 0))
                    CurrentAnnotation = _Annotations[dgAnnotations.CurrentRow.Index];
                else
                    CurrentAnnotation = null;
            }
        }

		private void rtxbComment_TextChanged(object sender, EventArgs e)
		{
			if (!_LoadingAnnotation)
				AnnotationDirty = true;
		}

		#endregion

		#region LoadControlData

        public void SetupAnnotations(DisplaySearch annosrch)
        {
            _LoadingAnnotation = true;
            _AnnotationSearch = annosrch; // reference the Annotation Search to update its lists

            cbGridAnnoType.DisplayMember = "Name";
            cbGridAnnoType.ValueMember = "TypeId";
            cbGridAnnoType.DataSource = AnnotationTypeInfoList.Get().Clone();
            cbGridAnnoType.SelectedIndex = -1; //don't pre-select an annotation type
            _LoadingAnnotation = false;
        }

		private void InitializeAnnotation()
		{
			//vlnCSLAStackTrace.ShowStack("InitializeAnnotation - CurrentAnnotation = {0}", CurrentAnnotation);
			_LoadingAnnotation = true;
			if (CurrentAnnotation == null)
			{
				cbGridAnnoType.SelectedIndex = -1;
				AnnotationText = "";
			}
			else
			{
				cbGridAnnoType.SelectedValue = CurrentAnnotation.TypeID;
				if (CurrentAnnotation.RtfText != "")
					AnnotationRTFText = CurrentAnnotation.RtfText;
				else
					AnnotationText = CurrentAnnotation.SearchText;
			}
			_LoadingAnnotation = false;
			AnnotationDirty = false;
			if (!_LoadingGrid)
				rtxbComment.Focus(); // Set the focus to the comment text
			if (CurrentAnnotation != null && MyUserInfo.IsReviewer(CurrentAnnotation.MyItem.MyDocVersion ) && CurrentAnnotation.UserID != MyUserInfo.UserID)
			{
				btnRemoveAnnotation.Enabled = false;
				cbGridAnnoType.Enabled = false;
				rtxbComment.Enabled = false;
			}
			else
			{
				btnRemoveAnnotation.Enabled = true;
				cbGridAnnoType.Enabled = true;
				rtxbComment.Enabled = true;
			}
		}

		#endregion

		#region VariousSupportMethods

		/// <summary>
		/// Set up the Annotation Grid for the given item
		/// This is called from frmVEPROMS
		/// </summary>
		/// <param name="currentitem"></param>
		public void UpdateAnnotationGrid(ItemInfo currentitem)
		{
			_CurrentItem = currentitem;
			UpdateAnnotationGrid();
		}

		private void UpdateAnnotationGrid()
		{
			_LoadingGrid = true;
			
			if (_CurrentItem == null) 
					_Annotations= null;
			else
			{
				_CurrentItem.RefreshItemAnnotations();
				_Annotations = _CurrentItem.ItemAnnotations;
			}
			itemAnnotationsBindingSource.DataSource = _Annotations;
            dgAnnotations.Refresh();
			if ((CurrentAnnotation == null || (_CurrentItem.ItemID != CurrentAnnotation.ItemID)))
			{
				if (_Annotations != null && _Annotations.Count > 0)
					CurrentAnnotation = _Annotations[0];
				else
					CurrentAnnotation = null;
			}
			FindCurrentAnnotation(); // position to the grid row of the current annotation
			_LoadingGrid = false;
			if (_Annotations == null || _Annotations.Count == 0) btnRemoveAnnotation.Enabled = false;
		}

		/// <summary>
		/// Find the Current Annotation in the Annotation Grid select the corresponding row
		/// Note: this is also called from AnnotationSearch.cs when a search results is selected
		/// </summary>
		public void FindCurrentAnnotation()
		{
			int row = 0;
            if (CurrentAnnotation != null)
            {
                if (_Annotations != null)
                {
                    foreach (AnnotationInfo ai in _Annotations)
                    {
                        if (ai.AnnotationID == CurrentAnnotation.AnnotationID)
                        {
                            row = _Annotations.IndexOf(ai);// +1;
                            break;
                        }
                    }
										try
										{
											dgAnnotations.Rows[row].Selected = true;
											if (!_LoadingGrid && (dgAnnotations.FirstDisplayedScrollingRowIndex != -1))
												dgAnnotations.FirstDisplayedScrollingRowIndex = row;
										}
										catch (Exception ex)
										{
											_MyLog.InfoFormat("Trying to open an annotation which has been removed");
										}
                }
            }
		}

		private void SaveAnnotation()
		{
			if (cbGridAnnoType.SelectedIndex == -1) return;
			if (rtxbComment.Text == string.Empty) return;
			using (AnnotationType annotationType = AnnotationType.Get((int)cbGridAnnoType.SelectedValue))
			{
				if (_AddingAnnotation)
				{
					_AddingAnnotation = false;
					using (Item myItem = _CurrentItem.Get())
					{
						using (Annotation annotation = Annotation.MakeAnnotation(myItem, annotationType, rtxbComment.Rtf, rtxbComment.Text, ""))
						{
							CurrentAnnotation = AnnotationInfo.Get(annotation.AnnotationID);
							//annotation.DTS = DateTime.Now;
							//annotation.Save();
						}
					}
				}
				else
				{
					using (Annotation annotation = CurrentAnnotation.Get())
					{
						annotation.RtfText = rtxbComment.Rtf;
						annotation.SearchText = rtxbComment.Text;
						annotation.MyAnnotationType = annotationType;
						annotation.DTS = DateTime.Now;
						annotation.UserID = Volian.Base.Library.VlnSettings.UserID;
						annotation.Save();
					}
				}
			}
			AnnotationDirty = false;
			UpdateAnnotationGrid();
		}
		#endregion

		//private void AnnotationDetails_Resize(object sender, EventArgs e)
		//{
		//    vlnStackTrace.ShowStackLocal(string.Format("Resize - Height = {0}", Height), 3, 4);
		//    //vlnStackTrace.ShowStack(string.Format("Resize - Height = {0}", Height));
		//}
	}
}