using System;
using CPF.ReoGrid.Data;
using CPF.ReoGrid.Events;
using CPF.ReoGrid.Utility;

namespace CPF.ReoGrid.Chart
{
	public class WorksheetChartDataSerial : IChartDataSerial, IDataSerial
	{
		public Worksheet Worksheet { get; protected set; }

		public virtual RangePosition DataRange
		{
			get
			{
				return this.dataRange;
			}
			set
			{
				bool flag = this.dataRange != value;
				if (flag)
				{
					this.dataRange = value;
					this.dataSource.OnDataChanged();
				}
			}
		}

		public CellPosition LabelAddress { get; set; }

		protected WorksheetChartDataSerial(WorksheetChartDataSource dataSource, Worksheet worksheet, CellPosition labelAddress)
		{
			bool flag = dataSource == null;
			if (flag)
			{
				throw new ArgumentNullException("dataSource");
			}
			bool flag2 = worksheet == null;
			if (flag2)
			{
				throw new ArgumentNullException("worksheet");
			}
			this.dataSource = dataSource;
			this.worksheet = worksheet;
			this.LabelAddress = labelAddress;
			bool flag3 = this.worksheet != null;
			if (flag3)
			{
				this.worksheet.CellDataChanged += this.worksheet_CellDataChanged;
				this.worksheet.RangeDataChanged += this.worksheet_RangeDataChanged;
			}
		}

		~WorksheetChartDataSerial()
		{
			try
			{
				bool flag = this.worksheet != null;
				if (flag)
				{
					this.worksheet.CellDataChanged -= this.worksheet_CellDataChanged;
					this.worksheet.RangeDataChanged -= this.worksheet_RangeDataChanged;
				}
			}
			finally
			{
                GC.SuppressFinalize(this);
            }
		}

		public WorksheetChartDataSerial(WorksheetChartDataSource dataSource, Worksheet worksheet, CellPosition labelAddress, RangePosition dataRange) : this(dataSource, worksheet, labelAddress)
		{
			this.dataRange = dataRange;
		}

		public WorksheetChartDataSerial(WorksheetChartDataSource dataSource, Worksheet worksheet, string labelAddress, string addressOrName) : this(dataSource, worksheet, new CellPosition(labelAddress))
		{
			bool flag = RangePosition.IsValidAddress(addressOrName);
			if (flag)
			{
				this.dataRange = new RangePosition(addressOrName);
			}
			else
			{
				bool flag2 = NamedRange.IsValidName(addressOrName);
				if (!flag2)
				{
					throw new InvalidAddressException(addressOrName);
				}
				bool flag3 = this.worksheet != null;
				if (!flag3)
				{
					throw new ReferenceObjectNotAssociatedException("Data source must associate to valid worksheet instance.");
				}
				NamedRange refRange;
				bool flag4 = worksheet.TryGetNamedRange(addressOrName, out refRange);
				if (!flag4)
				{
					throw new InvalidAddressException(addressOrName);
				}
				this.dataRange = refRange;
			}
		}

		private void worksheet_CellDataChanged(object sender, CellEventArgs e)
		{
			CellPosition position = e.Cell.Position;
			bool flag = this.dataRange.Contains(position) || this.LabelAddress == position;
			if (flag)
			{
				this.dataSource.OnDataChanged();
			}
		}

		private void worksheet_RangeDataChanged(object sender, RangeEventArgs e)
		{
			RangePosition range = e.Range;
			bool flag = this.dataRange.IntersectWith(range) || range.Contains(this.LabelAddress);
			if (flag)
			{
				this.dataSource.OnDataChanged();
			}
		}

		public string Label
		{
			get
			{
				return (this.worksheet == null || this.LabelAddress.IsEmpty) ? string.Empty : this.worksheet.GetCellText(this.LabelAddress);
			}
		}

		public int Count
		{
			get
			{
				return this.dataRange.Cols;
			}
		}

		public double? this[int index]
		{
			get
			{
				bool flag = this.dataRange.Rows > this.dataRange.Cols;
				object cellData;
				if (flag)
				{
					cellData = this.worksheet.GetCellData(this.dataRange.Row + index, this.dataRange.Col);
				}
				else
				{
					cellData = this.worksheet.GetCellData(this.dataRange.Row, this.dataRange.Col + index);
				}
				double value;
				bool flag2 = CellUtility.TryGetNumberData(cellData, out value);
				double? result;
				if (flag2)
				{
					result = new double?(value);
				}
				else
				{
					result = null;
				}
				return result;
			}
		}

		private WorksheetChartDataSource dataSource;

		private Worksheet worksheet;

		private RangePosition dataRange;
	}
}