using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using CPF.Controls;
using CPF.Drawing;
using CPF.ReoGrid.CellTypes;
using CPF.ReoGrid.Common;
using CPF.ReoGrid.Events;
using CPF.ReoGrid.Graphics;
using CPF.ReoGrid.Interaction;
using CPF.ReoGrid.Rendering;

namespace CPF.ReoGrid.Data
{
	public class AutoColumnFilter
	{
		public Worksheet Worksheet { get; private set; }

		public RangePosition ApplyRange { get; private set; }

		internal AutoColumnFilter(Worksheet worksheet, RangePosition range)
		{
			this.Worksheet = worksheet;
			this.ApplyRange = range;
		}

		public AutoColumnFilter.FilterColumnCollection Columns
		{
			get
			{
				bool flag = this.columnCollection == null;
				if (flag)
				{
					this.columnCollection = new AutoColumnFilter.FilterColumnCollection(this);
				}
				return this.columnCollection;
			}
		}

		public void Apply()
		{
			bool flag = this.Worksheet == null;
			if (!flag)
			{
				this.Worksheet.DoFilter(this.ApplyRange, delegate(int r)
				{
					int i = this.ApplyRange.Col;
					while (i <= this.ApplyRange.EndCol)
					{
						ColumnHeader columnHeader = this.Worksheet.RetrieveColumnHeader(i);
						bool flag2 = columnHeader == null;
						if (flag2)
						{
							i++;
						}
						else
						{
							AutoColumnFilter.AutoColumnFilterBody autoColumnFilterBody = columnHeader.Body as AutoColumnFilter.AutoColumnFilterBody;
							bool flag3 = autoColumnFilterBody == null || autoColumnFilterBody.IsSelectAll;
							if (flag3)
							{
								i++;
							}
							else
							{
								Cell cell = this.Worksheet.GetCell(r, i);
								bool flag4 = cell == null;
								if (flag4)
								{
									i++;
								}
								else
								{
									string text = cell.DisplayText;
									bool flag5 = string.IsNullOrEmpty(text);
									if (flag5)
									{
										text = LanguageResource.Filter_Blanks;
									}
									bool flag6 = !autoColumnFilterBody.SelectedTextItems.Contains(text);
									if (flag6)
									{
										return false;
									}
									i += (int)cell.Colspan;
								}
							}
						}
					}
					return true;
				});
			}
		}

		//[DebuggerBrowsable(DebuggerBrowsableState.Never)]
		public event EventHandler FilterButtonPressed;

		internal bool RaiseFilterButtonPress(AutoColumnFilter.AutoColumnFilterBody headerBody, Point point)
		{
			bool flag = headerBody.ColumnHeader == null;
			bool result;
			if (flag)
			{
				result = false;
			}
			else
			{
				bool flag2 = this.FilterButtonPressed != null;
				if (flag2)
				{
					FilterButtonPressedEventArgs filterButtonPressedEventArgs = new FilterButtonPressedEventArgs(headerBody.ColumnHeader);
					this.FilterButtonPressed(this, filterButtonPressedEventArgs);
					bool isCancelled = filterButtonPressedEventArgs.IsCancelled;
					if (isCancelled)
					{
						return true;
					}
				}
				bool flag3 = this.columnFilterUIFlag == AutoColumnFilterUI.DropdownButtonAndPanel;
				if (flag3)
				{
					ContextMenu contextMenu = new ContextMenu();
					contextMenu.Items.Add(new MenuItem
					{
						Header = "Item"
					});
					contextMenu.IsOpen = true;
					result = true;
				}
				else
				{
					result = false;
				}
			}
			return result;
		}

		private void CreateFilterHeaders(int start, int end)
		{
			try
			{
				this.Worksheet.ControlAdapter.ChangeCursor(CursorStyle.Busy);
				for (int i = start; i <= end; i++)
				{
					ColumnHeader columnHeader = this.Worksheet.RetrieveColumnHeader(i);
					columnHeader.Body = new AutoColumnFilter.AutoColumnFilterBody(this, columnHeader);
				}
			}
			finally
			{
				this.Worksheet.ControlAdapter.ChangeCursor(CursorStyle.PlatformDefault);
			}
		}

		private void RemoveFilterHeader(int start, int end)
		{
			bool flag = this.Worksheet.cols.Count <= 0;
			if (!flag)
			{
				for (int i = start; i <= end; i++)
				{
					ColumnHeader columnHeader = this.Worksheet.RetrieveColumnHeader(i);
					AutoColumnFilter.AutoColumnFilterBody autoColumnFilterBody = columnHeader.Body as AutoColumnFilter.AutoColumnFilterBody;
					bool flag2 = autoColumnFilterBody != null;
					if (flag2)
					{
						columnHeader.Body = null;
					}
				}
			}
		}

		public void Attach(Worksheet worksheet, AutoColumnFilterUI uiFlag = AutoColumnFilterUI.DropdownButtonAndPanel)
		{
			bool flag = worksheet == null;
			if (flag)
			{
				throw new ArgumentNullException("cannot attach to null worksheet", "worksheet");
			}
			this.Worksheet = worksheet;
			this.columnFilterUIFlag = uiFlag;
			this.CreateFilterHeaders(this.ApplyRange.Col, this.ApplyRange.EndCol);
			worksheet.ColumnsInserted += this.worksheet_ColumnsInserted;
		}

		public void Detach()
		{
			bool flag = this.Worksheet != null;
			if (flag)
			{
				this.Worksheet.ColumnsInserted -= this.worksheet_ColumnsInserted;
				this.Worksheet.ShowRows(this.ApplyRange.Row, this.ApplyRange.Rows);
				this.RemoveFilterHeader(this.ApplyRange.Col, this.ApplyRange.EndCol);
				this.Worksheet.RequestInvalidate();
				this.Worksheet = null;
			}
		}

		private void worksheet_ColumnsInserted(object sender, ColumnsInsertedEventArgs e)
		{
			bool flag = e.Index < this.ApplyRange.Col;
			if (flag)
			{
				this.ApplyRange.Offset(0, e.Count);
			}
			else
			{
				bool flag2 = e.Index > this.ApplyRange.Col && e.Index <= this.ApplyRange.EndCol;
				if (flag2)
				{
					this.CreateFilterHeaders(e.Index, e.Index + e.Count - 1);
					this.ApplyRange.SetCols(this.ApplyRange.Cols + e.Count);
				}
			}
		}

		private AutoColumnFilterUI columnFilterUIFlag;

		private AutoColumnFilter.FilterColumnCollection columnCollection;

		public class FilterColumnCollection : IEnumerable<AutoColumnFilter.AutoColumnFilterBody>, IEnumerable
		{
			internal FilterColumnCollection(AutoColumnFilter filter)
			{
				this.filter = filter;
			}

			public AutoColumnFilter.AutoColumnFilterBody this[int index]
			{
				get
				{
					bool flag = index < this.filter.ApplyRange.Col || index > this.filter.ApplyRange.EndCol || index < 0 || index >= this.filter.Worksheet.ColumnCount;
					if (flag)
					{
						throw new ArgumentOutOfRangeException("index", "Number of column to find the filter out of the valid range");
					}
					return this.filter.Worksheet.RetrieveColumnHeader(index).Body as AutoColumnFilter.AutoColumnFilterBody;
				}
			}

			public AutoColumnFilter.AutoColumnFilterBody this[string columnCode]
			{
				get
				{
					int numberOfChar = RGUtility.GetNumberOfChar(columnCode);
					return this[numberOfChar];
				}
			}

			private IEnumerator<AutoColumnFilter.AutoColumnFilterBody> GetEnum()
			{
				int num;
				for (int i = this.filter.ApplyRange.Col; i <= this.filter.ApplyRange.EndCol; i = num + 1)
				{
					ColumnHeader header = this.filter.Worksheet.RetrieveColumnHeader(i);
					bool flag = header == null;
					if (!flag)
					{
						AutoColumnFilter.AutoColumnFilterBody body = header.Body as AutoColumnFilter.AutoColumnFilterBody;
						bool flag2 = body == null;
						if (!flag2)
						{
							yield return body;
							header = null;
							body = null;
						}
					}
					num = i;
				}
				yield break;
			}

			public IEnumerator<AutoColumnFilter.AutoColumnFilterBody> GetEnumerator()
			{
				return this.GetEnum();
			}

			IEnumerator IEnumerable.GetEnumerator()
			{
				return this.GetEnum();
			}

			private AutoColumnFilter filter;
		}

		public class AutoColumnFilterBody : IHeaderBody
		{
			public ColumnHeader ColumnHeader { get; private set; }

			internal AutoColumnFilterBody(AutoColumnFilter autoFilter, ColumnHeader header)
			{
				this.autoFilter = autoFilter;
				this.ColumnHeader = header;
				this.DataDirty = true;
				this.IsSelectAll = true;
			}

			internal bool IsDropdown { get; set; }

			public void OnPaint(CellDrawingContext dc, Size headerSize)
			{
				ControlAppearanceStyle controlStyle = dc.Worksheet.controlAdapter.ControlStyle;
				bool flag = this.autoFilter.columnFilterUIFlag == AutoColumnFilterUI.DropdownButton || this.autoFilter.columnFilterUIFlag == AutoColumnFilterUI.DropdownButtonAndPanel;
				if (flag)
				{
					Rect columnFilterButtonRect = this.GetColumnFilterButtonRect(headerSize);
					Color colHeadStartColor = controlStyle.GetColHeadStartColor(false, this.IsDropdown, false, false);
					Color colHeadEndColor = controlStyle.GetColHeadEndColor(false, this.IsDropdown, false, false);
					IGraphics graphics = dc.Graphics;
					graphics.FillRectangleLinear(colHeadStartColor, colHeadEndColor, 90f, columnFilterButtonRect);
					graphics.DrawRectangle(columnFilterButtonRect, StaticResources.SystemColor_ControlDark);
					DrawingContext platformGraphics = dc.Graphics.PlatformGraphics;
					float size = Math.Min(7f * dc.Worksheet.renderScaleFactor, 7f);
					float num = columnFilterButtonRect.X + columnFilterButtonRect.Width / 2f;
					float num2 = columnFilterButtonRect.Y + columnFilterButtonRect.Height / 2f;
					GraphicsToolkit.FillTriangle(platformGraphics, size, new Point(ref num, ref num2), GraphicsToolkit.TriangleDirection.Down);
				}
			}

			public bool OnMouseDown(Size headerSize, WorksheetMouseEventArgs e)
			{
				bool flag = this.autoFilter == null || this.autoFilter.columnFilterUIFlag == AutoColumnFilterUI.NoGUI || this.ColumnHeader == null || this.ColumnHeader.Worksheet == null;
				bool result;
				if (flag)
				{
					result = false;
				}
				else
				{
					bool flag2 = this.IsMouseInButton(headerSize, e.RelativePosition);
					result = (flag2 && this.autoFilter.RaiseFilterButtonPress(this, e.AbsolutePosition));
				}
				return result;
			}

			public bool OnMouseMove(Size headerSize, WorksheetMouseEventArgs e)
			{
				bool flag = this.autoFilter == null || this.autoFilter.columnFilterUIFlag == AutoColumnFilterUI.NoGUI || this.ColumnHeader == null || this.ColumnHeader.Worksheet == null;
				bool result;
				if (flag)
				{
					result = false;
				}
				else
				{
					bool flag2 = this.IsMouseInButton(headerSize, e.RelativePosition);
					if (flag2)
					{
						e.CursorStyle = CursorStyle.Hand;
						result = true;
					}
					else
					{
						result = false;
					}
				}
				return result;
			}

			private bool IsMouseInButton(Size headerSize, Point position)
			{
				return this.GetColumnFilterButtonRect(headerSize).Contains(position);
			}

			internal Rect GetColumnFilterButtonRect(Size size)
			{
				Worksheet worksheet = this.ColumnHeader.Worksheet;
				float renderScaleFactor = worksheet.renderScaleFactor;
				float num = 0f;
				float num2 = 0f;
				float num3 = Math.Min(Math.Min(size.Width - 2f, 18f * renderScaleFactor), 20f);
				float num4 = Math.Min(Math.Min(size.Height - 2f, 18f * renderScaleFactor), 20f);
				Rect result = new Rect(ref num, ref num2, ref num3, ref num4);
				result.X = size.Width - result.Width - 2f;
				result.Y = (size.Height - result.Height) / 2f - 1f;
				return result;
			}

			public bool IsSelectAll { get; set; }

			public AutoColumnFilter.AutoColumnFilterBody.TextFilterCollection SelectedTextItems
			{
				get
				{
					bool flag = this.textItemsCollection == null;
					if (flag)
					{
						this.textItemsCollection = new AutoColumnFilter.AutoColumnFilterBody.TextFilterCollection(this);
					}
					return this.textItemsCollection;
				}
			}

			public List<string> GetDistinctItems()
			{
				bool flag = this.ColumnHeader == null || this.ColumnHeader.Worksheet == null;
				List<string> result;
				if (flag)
				{
					result = null;
				}
				else
				{
					List<string> items = new List<string>();
					int maxContentRow = this.ColumnHeader.Worksheet.MaxContentRow;
					this.ColumnHeader.Worksheet.IterateCells(this.autoFilter.ApplyRange.Row, this.ColumnHeader.Index, this.autoFilter.ApplyRange.Rows, 1, true, delegate(int r, int c, Cell cell)
					{
						string text = cell.DisplayText;
						bool flag2 = string.IsNullOrEmpty(text);
						if (flag2)
						{
							text = LanguageResource.Filter_Blanks;
						}
						bool flag3 = !items.Contains(text);
						if (flag3)
						{
							items.Add(text);
						}
						return true;
					});
					items.Sort();
					result = items;
				}
				return result;
			}

			internal bool DataDirty { get; set; }

			public void OnDataChange(int startRow, int endRow)
			{
				this.DataDirty = true;
			}

			internal AutoColumnFilter autoFilter;

			internal List<string> selectedTextItems = new List<string>();

			private AutoColumnFilter.AutoColumnFilterBody.TextFilterCollection textItemsCollection;

			public class TextFilterCollection : ICollection<string>, IEnumerable<string>, IEnumerable
			{
				internal TextFilterCollection(AutoColumnFilter.AutoColumnFilterBody column)
				{
					this.columnFilter = column;
				}

				public bool this[string item]
				{
					get
					{
						return this.columnFilter.selectedTextItems.Contains(item);
					}
					set
					{
						if (value)
						{
							this.Add(item);
						}
						else
						{
							this.Remove(item);
						}
					}
				}

				public IEnumerator<string> GetEnumerator()
				{
					return this.columnFilter.selectedTextItems.GetEnumerator();
				}

				IEnumerator IEnumerable.GetEnumerator()
				{
					return this.columnFilter.selectedTextItems.GetEnumerator();
				}

				public void Add(string item)
				{
					bool flag = !this.columnFilter.selectedTextItems.Contains(item);
					if (flag)
					{
						this.columnFilter.selectedTextItems.Add(item);
						this.columnFilter.IsSelectAll = false;
					}
				}

				public void Clear()
				{
					this.columnFilter.selectedTextItems.Clear();
					this.columnFilter.IsSelectAll = false;
				}

				public bool Contains(string item)
				{
					return this.columnFilter.selectedTextItems.Contains(item);
				}

				public void CopyTo(string[] array, int arrayIndex)
				{
					this.columnFilter.selectedTextItems.CopyTo(array, arrayIndex);
				}

				public int Count
				{
					get
					{
						return this.columnFilter.selectedTextItems.Count;
					}
				}

				public bool IsReadOnly
				{
					get
					{
						return false;
					}
				}

				public bool Remove(string item)
				{
					this.columnFilter.IsSelectAll = false;
					return this.columnFilter.selectedTextItems.Remove(item);
				}

				public void AddRange(IEnumerable<string> items)
				{
					this.columnFilter.selectedTextItems.AddRange(items);
					this.columnFilter.IsSelectAll = false;
				}

				private AutoColumnFilter.AutoColumnFilterBody columnFilter;
			}
		}
	}
}