using System;
using System.Diagnostics;
using System.Linq;
using System.Text.RegularExpressions;

namespace CPF.ReoGrid
{
	public static class RGUtility
	{
		public static string GetAlphaChar(long a)
		{
			char[] array = new char[10];
			int num = 9;
			while (a >= 26L)
			{
				array[num] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"[(int)(a % 26L)];
				a = a / 26L - 1L;
				num--;
			}
			array[num] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"[(int)(a % 26L)];
			return new string(array, num, 10 - num);
		}

		public static int GetNumberOfChar(string address)
		{
			bool flag;
			if (!string.IsNullOrEmpty(address) && address.Length >= 1)
			{
				flag = address.Any((char c) => c < 'A' || c > 'Z');
			}
			else
			{
				flag = true;
			}
			bool flag2 = flag;
			if (flag2)
			{
				throw new ArgumentException("cannot convert into number of index from empty address", "id");
			}
			int num = (int)(address[0] - "ABCDEFGHIJKLMNOPQRSTUVWXYZ"[0] + '\u0001');
			for (int i = 1; i < address.Length; i++)
			{
				num *= 26;
				num += (int)(address[i] - "ABCDEFGHIJKLMNOPQRSTUVWXYZ"[0] + '\u0001');
			}
			return num - 1;
		}

		public static bool IsValidAddress(string address)
		{
			return CellPosition.IsValidAddress(address) || RangePosition.IsValidAddress(address);
		}

		public static bool IsValidName(string name)
		{
			return RGUtility.NameRegex.IsMatch(name);
		}

		public static object[,] ParseTabbedString(string str)
		{
			int num = 0;
			int num2 = 0;
			string[] array = str.Split(new string[]
			{
				"\n"
			}, StringSplitOptions.None);
			int num3 = array.Length;
			while (string.IsNullOrEmpty(array[num3 - 1]))
			{
				num3--;
			}
			for (int i = 0; i < num3; i++)
			{
				string text = array[i];
				bool flag = text.EndsWith("\n");
				if (flag)
				{
					text = text.Substring(0, text.Length - 1);
				}
				bool flag2 = text.EndsWith("\r");
				if (flag2)
				{
					text = text.Substring(0, text.Length - 1);
				}
				string[] array2 = text.Split(new char[]
				{
					'\t'
				});
				num2 = Math.Max(num2, array2.Length);
				num++;
			}
			object[,] array3 = new object[num, num2];
			for (int j = 0; j < array.Length; j++)
			{
				string text2 = array[j];
				bool flag3 = text2.EndsWith("\n");
				if (flag3)
				{
					text2 = text2.Substring(0, text2.Length - 1);
				}
				bool flag4 = text2.EndsWith("\r");
				if (flag4)
				{
					text2 = text2.Substring(0, text2.Length - 1);
				}
				bool flag5 = text2.Length > 0;
				if (flag5)
				{
					string[] array4 = text2.Split(new char[]
					{
						'\t'
					});
					num2 = Math.Max(num2, array4.Length);
					for (int k = 0; k < array4.Length; k++)
					{
						string text3 = array4[k];
						bool flag6 = text3.StartsWith("\"") && text3.EndsWith("\"");
						if (flag6)
						{
							text3 = text3.Substring(1, text3.Length - 2);
						}
						array3[j, k] = text3;
					}
					num++;
				}
			}
			return array3;
		}

		public static string ToAddress(int row, int col, int absNum)
		{
			return RGUtility.ToAddress(row, col, 1, 1, absNum, false);
		}

		public static string ToAddress(int row, int col, bool a1style)
		{
			return RGUtility.ToAddress(row, col, 1, 1, a1style);
		}

		public static string ToAddress(int row, int col, int absNum, bool a1style)
		{
			return RGUtility.ToAddress(row, col, 1, 1, 0, a1style);
		}

		public static string ToAddress(int row, int col, int rows = 1, int cols = 1, bool a1style = true)
		{
			return RGUtility.ToAddress(row, col, rows, cols, 0, a1style);
		}

		public static string ToAddress(int row, int col, int rows, int cols, int absNum, bool a1style)
		{
			bool flag = rows <= 1 && cols <= 1;
			string result;
			if (flag)
			{
				if (a1style)
				{
					result = RGUtility.GetAlphaChar((long)col) + (row + 1).ToString();
				}
				else
				{
					switch (absNum)
					{
					default:
						result = string.Format("R{0}C{1}", row, col);
						break;
					case 2:
						result = string.Format("R{0}C[{1}]", row, col);
						break;
					case 3:
						result = string.Format("R[{0}]C{1}", row, col);
						break;
					case 4:
						result = string.Format("R[{0}]C[{1}]", row, col);
						break;
					}
				}
			}
			else
			{
				int num = row + rows - 1;
				int num2 = col + cols - 1;
				result = RGUtility.ToAddress(row, col, absNum, a1style) + ":" + RGUtility.ToAddress(row, col, absNum, a1style);
			}
			return result;
		}

		public static string ToSingleAddressIfPossible(Worksheet sheet, RangePosition range)
		{
			return sheet.IsMergedCell(range) ? range.StartPos.ToAddress() : range.ToAddress();
		}

		public static Process OpenFileOrLink(string url, string args = null)
		{
			return Process.Start(new ProcessStartInfo(url)
			{
				UseShellExecute = true,
				Arguments = args,
				Verb = "open"
			});
		}

		internal static readonly Regex CellReferenceRegex = new Regex("^\\s*(?:(?<abs_col>\\$)?(?<col>[A-Z]+)(?<abs_row>\\$)?(?<row>[0-9]+))\\s*$", RegexOptions.Compiled | RegexOptions.Singleline);

		internal static readonly Regex RangeReferenceRegex = new Regex("^\\s*(?:(?<abs_from_col>\\$)?(?<from_col>[A-Z]+)(?<abs_from_row>\\$)?(?<from_row>[0-9]+):(?<abs_to_col>\\$)?(?<to_col>[A-Z]+)(?<abs_to_row>\\$)?(?<to_row>[0-9]+))\\s*$", RegexOptions.Compiled | RegexOptions.Singleline);

		internal static readonly Regex SingleAbsoulteRangeRegex = new Regex("^\\s*(((?<abs_from_row>\\$)?(?<from_row>[0-9]+):(?<abs_to_row>\\$)?(?<to_row>[0-9]+))|((?<abs_from_col>\\$)?(?<from_col>[A-Z]+):(?<abs_to_col>\\$)?(?<to_col>[A-Z]+)))\\s*$", RegexOptions.Compiled | RegexOptions.Singleline);

		internal static readonly Regex NameRegex = new Regex("^\\s*[A-Za-z0-9_$]+\\s*$", RegexOptions.Compiled | RegexOptions.Singleline);

		private const string AlphaChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

		private const int AlphaCharsLength = 26;
	}
}