using System;
using System.Linq;

namespace CPF.ReoGrid
{
	public class TextAutoFillSectionEntry : IAutoFillSectionEntry
	{
		public object Value { get; }

		public TextAutoFillSectionEntry(string value)
		{
			char[] digits = "0123456789".ToCharArray();
			int num = value.IndexOfAny(digits);
			bool flag = num == -1;
			if (flag)
			{
				this.textLeftOfDigit = value;
			}
			else
			{
				this.hasDigit = true;
				bool flag2 = num > 0;
				if (flag2)
				{
					this.textLeftOfDigit = value.Substring(0, num);
					value = value.Substring(num);
				}
				char[] array = value.TakeWhile((char c) => digits.Contains(c)).ToArray<char>();
				this.textRightOfDigit = value.Substring(array.Length);
				this.Value = double.Parse(new string(array));
			}
		}

		public bool IsSequenceOf(IAutoFillSectionEntry otherEntry)
		{
			TextAutoFillSectionEntry textAutoFillSectionEntry = otherEntry as TextAutoFillSectionEntry;
			bool flag = textAutoFillSectionEntry == null;
			return !flag && (this.textLeftOfDigit.Equals(textAutoFillSectionEntry.textLeftOfDigit) && this.textRightOfDigit.Equals(textAutoFillSectionEntry.textRightOfDigit)) && this.hasDigit == textAutoFillSectionEntry.hasDigit;
		}

		public object GetIterationValue(object baseValue, object incrementPerIteration, int iteration)
		{
			string str = string.Empty;
			bool flag = this.hasDigit;
			if (flag)
			{
				double differenceToBaseValue = this.GetDifferenceToBaseValue(baseValue);
				double num = (double)incrementPerIteration;
				str = ((double)baseValue + differenceToBaseValue + num * (double)iteration).ToString();
			}
			return this.textLeftOfDigit + str + this.textRightOfDigit;
		}

		public object GetIncrementPerIteration(object baseValue, int numberOfEntries)
		{
			return (numberOfEntries > 1 && this.hasDigit) ? (this.GetDifferenceToBaseValue(baseValue) / (double)(numberOfEntries - 1) * (double)numberOfEntries) : 0.0;
		}

		private double GetDifferenceToBaseValue(object baseValue)
		{
			return this.hasDigit ? ((double)this.Value - (double)baseValue) : 0.0;
		}

		private string textLeftOfDigit = string.Empty;

		private string textRightOfDigit = string.Empty;

		private bool hasDigit;
	}
}