using System;
using System.IO;
using System.Reflection;

namespace EC.Utils
{
	public class EnvUtil
	{
		private static string workDirectory;

		public static void InitWorkDirectory()
		{
			Directory.SetCurrentDirectory(GetWorkDirectory());
		}

		public static string GetWorkDirectory()
		{
			workDirectory = string.IsNullOrEmpty(workDirectory) ? Path.GetDirectoryName(Assembly.GetEntryAssembly().Location) : workDirectory;
			return workDirectory;
		}

		public static bool AddDllPath(string dllPath)
		{
			if (!Directory.Exists(dllPath)) { return false; }
			string envPath = Environment.GetEnvironmentVariable("PATH");
			Environment.SetEnvironmentVariable("PATH", envPath + ";" + dllPath);
			return true;
		}

		public static string CombinePath(string path1, string path2)
		{
			return Path.Combine(path1, path2);
		}

		public static string CombinePath(params string[] paths)
		{
			return Path.Combine(paths);
		}

		public static bool ExistFile(string file)
		{
			return File.Exists(file);
		}

		public static bool ExistDirectory(string dir)
		{
			return Directory.Exists(dir);
		}
	}
}