using System;
using System.Collections.Generic;
using System.Text;

namespace CPF.ReoGrid.Utility
{
	internal class RelativePathUtility
	{
		internal static string GetRelativePath(string originalPath, string relativePath)
		{
			bool flag = string.IsNullOrEmpty(relativePath);
			string result;
			if (flag)
			{
				result = originalPath;
			}
			else
			{
				List<string> pathStack = new List<string>();
				bool flag2 = !relativePath.StartsWith("/");
				if (flag2)
				{
					RelativePathUtility.PushPath(pathStack, originalPath);
				}
				RelativePathUtility.PushPath(pathStack, relativePath);
				result = RelativePathUtility.DumpPathStack(pathStack);
			}
			return result;
		}

		private static void PushPath(List<string> pathStack, string relativePath)
		{
			string[] array = relativePath.Split(new char[]
			{
				'/'
			});
			foreach (string text in array)
			{
				bool flag = text == ".." && pathStack.Count > 0;
				if (flag)
				{
					pathStack.RemoveAt(pathStack.Count - 1);
				}
				else
				{
					bool flag2 = text.Length > 0 && text != ".";
					if (flag2)
					{
						pathStack.Add(text);
					}
				}
			}
		}

		private static string DumpPathStack(List<string> pathStack)
		{
			StringBuilder stringBuilder = new StringBuilder();
			foreach (string value in pathStack)
			{
				bool flag = stringBuilder.Length > 0;
				if (flag)
				{
					stringBuilder.Append('/');
				}
				stringBuilder.Append(value);
			}
			return stringBuilder.ToString();
		}

		internal static string GetFileNameFromPath(string path)
		{
			int num = path.LastIndexOf('/');
			bool flag = num <= -1;
			string result;
			if (flag)
			{
				result = path;
			}
			else
			{
				bool flag2 = num >= path.Length - 1;
				if (flag2)
				{
					result = string.Empty;
				}
				else
				{
					result = path.Substring(num + 1);
				}
			}
			return result;
		}

		internal static string GetPathWithoutFilename(string path)
		{
			int num = path.LastIndexOf('/');
			bool flag = num <= -1;
			string result;
			if (flag)
			{
				result = string.Empty;
			}
			else
			{
				bool flag2 = num == path.Length - 1;
				if (flag2)
				{
					result = path;
				}
				else
				{
					bool flag3 = num >= path.Length;
					if (flag3)
					{
						result = path + "/";
					}
					else
					{
						result = path.Substring(0, num + 1);
					}
				}
			}
			return result;
		}
	}
}