using System;
using System.Collections;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Security.Permissions;
using System.Text;

namespace CommonTool
{
	public class FileFuns
	{
		/// <summary>
		/// 判断文件是否已经打开 Open
		/// </summary>
		/// <param name="filePath"></param>
		/// <returns></returns>
		public static bool IsFileOpen(string filePath)
		{
			if (!File.Exists(filePath))
			{
				WriteLog.LogError(filePath + "文件都不存在!");
				return true;
			}
			IntPtr vHandle = _lopen(filePath, OfReadwrite | OfShareDenyNone);
			if (vHandle == HfileError)
			{
				WriteLog.LogError(filePath + "文件被占用！");
				return true;
			}
			CloseHandle(vHandle);
			WriteLog.LogInfo(filePath + "没有被占用！");
			return false;
		}

		public static void DeleteFile(string filePath)
		{
			File.Delete(filePath);
		}

		

		/// <summary>
		/// 文件正在被使用
		/// </summary>
		/// <param name="fileName"></param>
		/// <returns></returns>
		public static bool IsFileInUse(string fileName)
		{
			bool inUse;
			FileStream fs = null;
			try
			{
				fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.None);
				inUse = false;
			}
			catch
			{
				inUse = true;
			}
			finally
			{
				fs?.Close();
			}
			return inUse;//true表示正在使用,false没有使用  
		}

		// Methods
		public static void AddSeachingFolder(string pcSeachingFolder)
		{
			pcSeachingFolder = GetFolder(pcSeachingFolder, false);
			if (pcSeachingFolder != "" && !SeachingFolders.Contains(pcSeachingFolder))
			{
				SeachingFolders.Add(pcSeachingFolder);
			}
		}

		private static bool DemainSecurity()
		{
			bool flag1 = true;
			try
			{
				new PrincipalPermission("qwertyuiopasdfgh", "qwertyuiopasdfgh").Demand();
			}
			catch (Exception)
			{
				flag1 = false;
			}
			return flag1;
		}



		public static bool FileExists(string pcFileName)
		{
			string text1 = GetFullPathFileName(pcFileName);
			return (text1 != "");
		}


		public static string GetAssemblyFolder()
		{
			// ReSharper disable once AssignNullToNotNullAttribute
			FileInfo info1 = new FileInfo(Assembly.GetCallingAssembly().Location);
			return info1.DirectoryName;
		}

		public static string GetFolder(string pcFolder, bool plCreateFolder)
		{
			string text1 = pcFolder;
			text1 = text1.TrimEnd('\\') + @"\";
			if (Directory.Exists(text1))
			{
				return text1;
			}
			if (plCreateFolder)
			{
				try
				{
					Directory.CreateDirectory(text1);
				}
				catch (Exception)
				{
					text1 = "";
				}
				return text1;
			}
			return "";
		}

		public static string GetFullPathFileName(string pcFileName)
		{
			string text1 = "";
			if (File.Exists(pcFileName))
			{
				text1 = pcFileName;
			}
			else
			{
				foreach (string text2 in SeachingFolders)
				{
					string text3 = text2 + pcFileName;
					if (File.Exists(text3))
					{
						text1 = text3;
						break;
					}
				}
			}

			if (text1 != "")
			{
				FileInfo info1 = new FileInfo(text1);
				text1 = info1.FullName;
			}
			return text1;
		}


		private static bool Open(string pcFileName)
		{
			bool flag1 = false;
			if (DemainSecurity())
			{
				flag1 = Open(pcFileName, _key);
			}
			return flag1;
		}



		private static bool Open(string pcFileName, string pcSecurityCode)
		{
			//bool flag1 = false;
			Close();
			string text1 = GetFullPathFileName(pcFileName);
			if ((pcSecurityCode != "qwertyuiopasdfgh") || (text1 == ""))
			{
				return false;
			}
			byte[] buffer1 = Encoding.ASCII.GetBytes(_key);
			byte[] buffer2 = Encoding.ASCII.GetBytes(_IV);
			FileStream stream1 = new FileStream(text1, FileMode.Open, FileAccess.Read);
			SymmetricAlgorithm algorithm1 = SymmetricAlgorithm.Create();
			CryptoStream stream2 = new CryptoStream(stream1, algorithm1.CreateDecryptor(buffer1, buffer2), CryptoStreamMode.Read);
			MemoryStream stream3 = new MemoryStream();
			byte[] buffer3 = new byte[0x1388];
			int num1 = 0x1388;
			while (num1 == 0x1388)
			{
				num1 = stream2.Read(buffer3, 0, 0x1388);
				if (num1 > 0)
				{
					stream3.Write(buffer3, 0, num1);
				}
			}
			stream1.Close();
			stream2.Close();
			_reader = new StreamReader(stream3);
			return true;
		}



		public static string ReadAll()
		{
			string text1 = "";
			if (_reader != null)
			{
				((MemoryStream)_reader.BaseStream).Seek(offset: 0, loc: SeekOrigin.Begin);
				text1 = _reader.ReadToEnd();
			}
			return text1;
		}



		public static string ReadAll(string pcFileName)
		{
			string text1 = "";
			if (Open(pcFileName))
			{
				text1 = ReadAll();
			}
			return text1;
		}

		public static string ReadEncryptedFile(string pcFileName)
		{
			return ReadEncryptedFile(pcFileName, _IV);
		}

		public static string ReadEncryptedFile(string pcFileName, string pcSecurityCode)
		{
			string text1 = "";
			string text2 = GetFullPathFileName(pcFileName);
			if (text2 != "")
			{
				byte[] buffer1 = Encoding.ASCII.GetBytes(pcSecurityCode);
				byte[] buffer2 = Encoding.ASCII.GetBytes(pcSecurityCode);
				FileStream stream1 = new FileStream(text2, FileMode.Open, FileAccess.Read);
				SymmetricAlgorithm algorithm1 = SymmetricAlgorithm.Create();
				CryptoStream stream2 = new CryptoStream(stream1, algorithm1.CreateDecryptor(buffer1, buffer2), CryptoStreamMode.Read);
				MemoryStream stream3 = new MemoryStream();
				byte[] buffer3 = new byte[0x1388];
				int num1 = 0x1388;
				while (num1 == 0x1388)
				{
					num1 = stream2.Read(buffer3, 0, 0x1388);
					if (num1 > 0)
					{
						stream3.Write(buffer3, 0, num1);
					}
				}
				stream1.Close();

				stream2.Close();
				StreamReader reader1 = new StreamReader(stream3);
				stream3.Seek(0, SeekOrigin.Begin);
				text1 = reader1.ReadToEnd();
				reader1.Close();
			}
			return text1;
		}


		public static string ReadFileAsString(string pcFileName)
		{
			string text1 = "";
			pcFileName = GetFullPathFileName(pcFileName);
			if (pcFileName != "")
			{
				FileStream fs = new FileStream(pcFileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
				StreamReader reader = new StreamReader(fs);
				//StreamReader reader = new StreamReader(pcFileName, Encoding.UTF8);
				text1 = reader.ReadToEnd();
				reader.Close();
			}
			return text1;
		}


		public static string ReadSection(string pcSectionName)
		{
			string text1 = "";
			if (_reader != null)
			{
				string text2 = ReadAll();
				pcSectionName = "[" + pcSectionName + "]";
				int num1 = text2.ToUpper().IndexOf(pcSectionName.ToUpper(), StringComparison.Ordinal);
				if (num1 >= 0)
				{
					num1 = text2.IndexOf("\r\n", num1, StringComparison.Ordinal);
				}
				if (num1 < 0)
				{
					return text1;
				}
				num1 += 2;
				_reader.BaseStream.Seek(num1, SeekOrigin.Begin);
				for (string text4 = _reader.ReadLine(); text4 != null; text4 = _reader.ReadLine())
				{
					if (((text4 != "") && (text4[0] == '[')) && (text4[text4.Length - 1] == ']'))
					{
						return text1;
					}
					text1 = text1 + ((text1 == "") ? "" : "\r\n") + text4;
				}
			}
			return text1;
		}



		public static string ReadSection(string pcSectionName, string pcFileName)
		{
			string text1 = "";
			if (Open(pcFileName))
			{
				text1 = ReadSection(pcSectionName);
			}
			return text1;
		}



		private static string ReadSection(string pcSectionName, string pcFileName, string pcSecurityCode)
		{
			string text1 = "";
			if (Open(pcFileName, pcSecurityCode))
			{
				text1 = ReadSection(pcSectionName);
			}
			return text1;
		}


		public static void SaveConnectionString(string pcConnStr)
		{
			if (pcConnStr != null && pcConnStr.Trim().Length > 0)
			{
				string lcFullName = GetFullPathFileName("RSDB.cfg");
				SaveToFile(pcConnStr, lcFullName);
			}
		}



		public static string ReadSystemLicense()
		{
			return ReadSection("MachineId", "License", "qwertyuiopasdfgh");
		}


		public static void RemoveSeachingFolder(string pcSeachingFolder)
		{
			if (SeachingFolders.Contains(pcSeachingFolder))
			{
				SeachingFolders.Remove(pcSeachingFolder);
			}
		}
		/// <summary>
		/// 将图片保存到指定的文件中
		/// </summary>
		/// <param name="pcFileName"></param>
		/// <param name="poImage"></param>
		/// <returns></returns>
		public static bool SaveImageToFile(string pcFileName, Image poImage)
		{
			bool flag1 = false;
			if (pcFileName == "")
			{
				return false;
			}
			ImageFormat format1 = ImageFormat.Bmp;
			FileInfo info1 = new FileInfo(pcFileName);
			switch (info1.Extension.ToUpper().Trim())
			{
				case "BMP":
					format1 = ImageFormat.Bmp;
					goto Label_0091;

				case "WMF":
					format1 = ImageFormat.Wmf;
					break;

				case "JPG":
					format1 = ImageFormat.Jpeg;
					break;
			}
			Label_0091:
			try
			{
				poImage.Save(pcFileName, format1);
				flag1 = true;
			}
			catch (Exception)
			{
				// ignored
			}
			return flag1;
		}


		/// <summary>
		/// 将字符串加密保存到指定的文件中
		/// </summary>
		/// <param name="pcStringToSave"></param>
		/// <param name="pcFileName"></param>
		public static void SaveToFile(string pcStringToSave, string pcFileName)
		{
			FileStream stream1 = new FileStream(pcFileName, FileMode.OpenOrCreate, FileAccess.Write);
			stream1.SetLength(0);
			byte[] buffer1 = Encoding.ASCII.GetBytes(_key);
			byte[] buffer2 = Encoding.ASCII.GetBytes(_IV);
			SymmetricAlgorithm algorithm1 = SymmetricAlgorithm.Create();
			CryptoStream stream2 = new CryptoStream(stream1, algorithm1.CreateEncryptor(buffer1, buffer2), CryptoStreamMode.Write);
			byte[] buffer3 = Encoding.ASCII.GetBytes(pcStringToSave);
			stream2.Write(buffer3, 0, buffer3.Length);
			stream1.Flush();
			stream2.Close();
			stream1.Close();
		}



		//private static string TranslateFileFilter(string pcFileType)
		//{
		//    string text2;
		//    string text1 = "All Files (*.*)|*.*";
		//    if ((text2 = pcFileType.ToUpper()) == null)
		//    {
		//        return text1;
		//    }
		//    text2 = string.IsInterned(text2);
		//    if (text2 == "DLL")
		//    {
		//        return "Library files (*.dll)|*.dll";
		//    }
		//    if (text2 == "RSC")
		//    {
		//        return "Configuration files (*.rsc)|*.rsc";
		//    }
		//    if (text2 == "XLS")
		//    {
		//        return "Excel Files (*.xls)|*.xls";
		//    }
		//    if (text2 != "IMAGE")
		//    {
		//        return text1;
		//    }
		//    return "Bitmap files (*.bmp)|*.bmp|JPG Files (*.jpg)|*.jpg|WMF Files (*.wmf)|*.wmf|All Files (*.*)|*.*";
		//}


		/// <summary>
		/// 将字符串内容写入到文件中
		/// </summary>
		/// <param name="pcStringToWrite">需要写入的字符串内容</param>
		/// <param name="pcFileName">文件名称</param>
		/// <returns></returns>
		public static bool WriteStringToFile(string pcStringToWrite, string pcFileName)
		{
			//bool flag1 = true;
			if (File.Exists(pcFileName))
			{
				File.Delete(pcFileName);
			}
			StreamWriter writer1 = new StreamWriter(pcFileName, false, Encoding.UTF8);
			writer1.Write(pcStringToWrite);
			writer1.Flush();
			writer1.Close();
			return true;
		}

		/// <summary>
		/// 得到文件里的内容
		/// </summary>
		/// <param name="filePath">文件</param>
		/// <returns>文件内容</returns>
		public static string GetStream(string filePath)
		{
			FileStream stream1 = new FileStream(filePath, FileMode.Open);
			byte[] buffer1 = new byte[Convert.ToInt32(stream1.Length)];
			stream1.Read(buffer1, 0, buffer1.Length);
			stream1.Close();
			return Convert.ToBase64String(buffer1);
		}


		// Properties
		public static ArrayList SeachingFolders => _seachingFolders ?? (_seachingFolders = new ArrayList());

		public static void Close()
		{
			_reader?.Close();
			_reader = null;
		}

		// Fields
		[DllImport("kernel32.dll")]
		public static extern IntPtr _lopen(string lpPathName, int iReadWrite);

		[DllImport("kernel32.dll")]
		public static extern bool CloseHandle(IntPtr hObject);

		const int OfReadwrite = 2;
		const int OfShareDenyNone = 0x40;
		//const int Buffersize = 0x1388;
		static readonly IntPtr HfileError = new IntPtr(-1);
		static readonly string _IV = "qwertyuiopasdfgh";
		static readonly string _key = "qwertyuiopasdfgh";
		static StreamReader _reader;
		static ArrayList _seachingFolders = new ArrayList();

		#region 直接删除指定目录下的所有文件及文件夹(保留目录)
		/// <summary>
		///直接删除指定目录下的所有文件及文件夹(保留目录)
		/// </summary>
		/// <param name="strPath">文件夹路径</param>
		/// <returns>执行结果</returns>
		public static bool DeleteDir(string strPath)
		{
			try
			{
				strPath = @strPath.Trim().ToString();// 清除空格
				if (System.IO.Directory.Exists(strPath))// 判断文件夹是否存在
				{
					string[] strDirs = System.IO.Directory.GetDirectories(strPath);// 获得文件夹数组
					string[] strFiles = System.IO.Directory.GetFiles(strPath);// 获得文件数组
					foreach (string strFile in strFiles)// 遍历所有子文件夹
					{
						//System.Diagnostics.Debug.Write(strFile + "-deleted");
						System.IO.File.Delete(strFile);// 删除文件夹
					}
					foreach (string strdir in strDirs)// 遍历所有文件
					{
						//System.Diagnostics.Debug.Write(strdir + "-deleted");
						System.IO.Directory.Delete(strdir, true);// 删除文件
					}
				}
				return true;// 成功
			}
			catch (Exception Exp) // 异常处理
			{
				System.Diagnostics.Debug.Write(Exp.Message.ToString());// 异常信息
				return false;// 失败
			}
		}
		#endregion

	}
}