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

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


        public static void Close()
        {
            if (FileFuns._Reader != null)
            {
                FileFuns._Reader.Close();
            }
            FileFuns._Reader = null;
        }



        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 = FileFuns.GetFullPathFileName(pcFileName);
            return (text1 != "");
        }


        public static string GetAssemblyFolder()
        {
            FileInfo info1 = new FileInfo(Assembly.GetCallingAssembly().Location);
            return info1.DirectoryName;
        }

        public static string GetFolder(string pcFolder, bool plCreateFolder)
        {
            string text1 = pcFolder;
            text1 = text1.TrimEnd(new char[] { '\\' }) + @"\";
            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 FileFuns.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 (FileFuns.DemainSecurity())
            {
                flag1 = FileFuns.Open(pcFileName, FileFuns._key);
            }
            return flag1;
        }



        private static bool Open(string pcFileName, string pcSecurityCode)
        {
            bool flag1 = false;
            FileFuns.Close();
            string text1 = FileFuns.GetFullPathFileName(pcFileName);
            if ((pcSecurityCode != "qwertyuiopasdfgh") || (text1 == ""))
            {
                return flag1;
            }
            byte[] buffer1 = Encoding.ASCII.GetBytes(FileFuns._key);
            byte[] buffer2 = Encoding.ASCII.GetBytes(FileFuns._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();
            FileFuns._Reader = new StreamReader(stream3);
            return true;
        }



        public static string ReadAll()
        {
            string text1 = "";
            if (FileFuns._Reader != null)
            {
                ((MemoryStream)FileFuns._Reader.BaseStream).Seek((long)0, SeekOrigin.Begin);
                text1 = FileFuns._Reader.ReadToEnd();
            }
            return text1;
        }



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



        public static string ReadEncryptedFile(string pcFileName, string pcSecurityCode)
        {
            string text1 = "";
            string text2 = FileFuns.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((long)0, SeekOrigin.Begin);
                text1 = reader1.ReadToEnd();
                reader1.Close();
            }
            return text1;
        }


        public static string ReadFileAsString(string pcFileName)
        {
            string text1 = "";
            pcFileName = GetFullPathFileName(pcFileName);
            if (pcFileName != "")
            {
                StreamReader reader1 = new StreamReader(pcFileName, Encoding.Default);
                text1 = reader1.ReadToEnd();
                reader1.Close();
            }
            return text1;
        }


        public static string ReadSection(string pcSectionName)
        {
            string text1 = "";
            if (FileFuns._Reader != null)
            {
                string text2 = FileFuns.ReadAll();
                pcSectionName = "[" + pcSectionName + "]";
                int num1 = text2.ToUpper().IndexOf(pcSectionName.ToUpper());
                if (num1 >= 0)
                {
                    num1 = text2.IndexOf("\r\n", num1);
                }
                if (num1 < 0)
                {
                    return text1;
                }
                num1 += 2;
                FileFuns._Reader.BaseStream.Seek((long)num1, SeekOrigin.Begin);
                for (string text4 = FileFuns._Reader.ReadLine(); text4 != null; text4 = FileFuns._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 (FileFuns.Open(pcFileName))
            {
                text1 = FileFuns.ReadSection(pcSectionName);
            }
            return text1;
        }



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


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



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


        public static void RemoveSeachingFolder(string pcSeachingFolder)
        {
            if (FileFuns.SeachingFolders.Contains(pcSeachingFolder))
            {
                FileFuns.SeachingFolders.Remove(pcSeachingFolder);
            }
        }

        public static bool SaveImageToFile(string pcFileName, Image poImage)
        {
            bool flag1 = false;
            if (pcFileName == "")
            {
                return flag1;
            }
            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)
            {
            }
            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((long)0);
            byte[] buffer1 = Encoding.ASCII.GetBytes(FileFuns._key);
            byte[] buffer2 = Encoding.ASCII.GetBytes(FileFuns._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 == "NPC")
            {
                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 (*.*)|*.*";
        }



        public static bool WriteStringToFile(string pcStringToWrite, string pcFileName)
        {
            bool flag1 = true;
            if (File.Exists(pcFileName))
            {
                File.Delete(pcFileName);
            }
            StreamWriter writer1 = new StreamWriter(pcFileName);
            writer1.Write(pcStringToWrite);
            writer1.Flush();
            writer1.Close();
            return flag1;
        }

        /// <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
        {
            get
            {
                if (FileFuns._SeachingFolders == null)
                {
                    FileFuns._SeachingFolders = new ArrayList();
                }
                return FileFuns._SeachingFolders;
            }
        }

        // Fields

        private static string _IV = "qwertyuiopasdfgh";
        private static string _key = "qwertyuiopasdfgh";
        private static StreamReader _Reader;
        private static ArrayList _SeachingFolders = new ArrayList();
        private const int BUFFERSIZE = 0x1388;
    }
}