using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;

namespace WWPipeLine.Commons
{
	public class Paths
	{
		private static string ApplicationExePath
		{
			get
			{
				string codeBase = Assembly.GetExecutingAssembly().Location;
				UriBuilder uri = new UriBuilder(codeBase);
				string path = Uri.UnescapeDataString(uri.Path);
				return Path.GetDirectoryName(path);
			}
		}

		public static string ApplicationPath
		{
			get
			{
				FileInfo f = new FileInfo(ApplicationExePath);
				return f.Directory.FullName;
			}
		}
		 

		public static string ApplicationConfigDir
		{
			get
			{
				FileInfo f = new FileInfo(ApplicationPath);
				return f.FullName + "\\configs";
				//return f.FullName + "/configs";
			}
		}
		public static string ApplicationPictureDir
		{
			get
			{
				FileInfo f = new FileInfo(ApplicationPath);
				return f.FullName + "\\pictures";
				//return f.FullName + "/configs";
			}
		}
		public static string ApplicationResourcesDir
		{
			get
			{
				FileInfo f = new FileInfo(ApplicationPath);
				return f.FullName + "\\resources";
			}
		}

		public static string ApplicationLogDir
		{
			get
			{
				FileInfo f = new FileInfo(ApplicationPath);
				return f.FullName + "\\logs";
			}
		}

		/// <summary>
		/// 临时文件路径
		/// </summary>
		public static string ApplicationTempResources
		{
			get
			{
				FileInfo f = new FileInfo(ApplicationPath);
				string path = f.FullName + "\\temp";
				if (!System.IO.Directory.Exists(path))
				{
					Directory.CreateDirectory(path);
				}
				return path;
			}
		}

		/// <summary>
		/// APPLow
		/// </summary>
		public static string AppLocalLowPath
		{
			get
			{
				return Path.Combine(Path.GetDirectoryName(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)), "LocalLow");
			}
		}

		/// <summary>
		/// 系统帮助文档路径
		/// </summary>
		public static string ApplicationHelpDocument
		{
			get
			{
				FileInfo f = new FileInfo(ApplicationPath);
				return f.FullName + "\\document\\Help.pdf";
			}
		}

		internal class FileTimeInfo
		{
			public string FileName;  //文件名
			public DateTime FileCreateTime; //创建时间
			public FileInfo FileInfo;
		}

		/// <summary>
		/// 获取目录下指定后缀的文件
		/// </summary>
		/// <param name="dir"></param>
		/// <param name="ext"></param>
		/// <returns></returns>
		public static List<FileInfo> FilesInDir(string dir, string ext)
		{
			List<FileInfo> list = new List<FileInfo>();
			DirectoryInfo d = new DirectoryInfo(dir);
			foreach (FileInfo fi in d.GetFiles())
			{
				if (string.IsNullOrEmpty(ext) || fi.Extension.ToUpper() == ext.ToUpper())
				{
					list.Add(fi);
				}
			}
			return list;
		}
		/// <summary>
		/// 获取某个路径下的最新文件
		/// </summary>
		/// <param name="dir"></param>
		/// <param name="ext"></param>
		/// <returns></returns>
		public static FileInfo FileInDirLastCreated(string dir, string ext, string extAnother = null)
		{
			if (!Directory.Exists(dir))
			{
				throw new FileNotFoundException(dir + " 未找到");
			}
			FileTimeInfo fi = GetLatestFileTimeInfo(dir, ext, extAnother);
			return new FileInfo(fi.FileName);
		}
		//获取最近创建的文件名和创建时间
		//如果没有指定类型的文件，返回null
		static FileTimeInfo GetLatestFileTimeInfo(string dir, string ext, string extAnother = null)
		{
			List<FileTimeInfo> list = new List<FileTimeInfo>();
			DirectoryInfo d = new DirectoryInfo(dir);
			foreach (FileInfo fi in d.GetFiles())
			{
				if (string.IsNullOrEmpty(ext) || fi.Extension.ToUpper() == ext.ToUpper())
				{
					list.Add(new FileTimeInfo()
					{
						FileName = fi.FullName,
						FileCreateTime = fi.CreationTime,
						FileInfo = fi
					});
				}
			}
			if (list.Count == 0)
			{
				foreach (FileInfo fi in d.GetFiles())
				{
					if (string.IsNullOrEmpty(extAnother) || fi.Extension.ToUpper() == extAnother.ToUpper())
					{
						list.Add(new FileTimeInfo()
						{
							FileName = fi.FullName,
							FileCreateTime = fi.CreationTime,
							FileInfo = fi
						});
					}
				}
			}
			var qry = from x in list
					  orderby x.FileCreateTime
					  select x;
			return qry.LastOrDefault();
		}
		public static void ClearFolder(string dir)
		{
			foreach (string d in Directory.GetFileSystemEntries(dir))
			{
				if (System.IO.File.Exists(d))
				{
					FileInfo fi = new FileInfo(d);
					if (fi.Attributes.ToString().IndexOf("ReadOnly") != -1)
						fi.Attributes = FileAttributes.Normal;
					System.IO.File.Delete(d);//直接删除其中的文件    
				}
				else
				{
					DirectoryInfo d1 = new DirectoryInfo(d);
					if (d1.GetFiles().Length != 0)
					{
						ClearFolder(d1.FullName);////递归删除子文件夹  
					}
					Directory.Delete(d);
				}
			}
		}
	}
}