using System;
using System.Collections.Generic;
using System.Net;
using System.Text;
using System.IO;
using System.Windows.Forms;

namespace Welling_Motor_Debug_Tool
{
    public class ftp
    {
        string serverIP;
        string serverPort;
        string userId;
        string passWord;
        public bool IsNetConnected = false;

        /// <summary>
        /// 配置网络
        /// </summary>
        /// <param name="serverIP"></param>
        /// <param name="serverPort"></param>
        /// <param name="userId"></param>
        /// <param name="passWord"></param>
        public void FtpOption(string serverIP, string serverPort, string userId, string passWord)
        {
            this.serverIP = serverIP;
            this.serverPort = serverPort;
            this.userId = userId;
            this.passWord = passWord;
        }

        /// <summary>
        /// 检查网络
        /// </summary>
        /// <returns>bool</returns>
        public bool CheckFtp()
        {
            try
            {
                Uri uri = new Uri(string.Format("ftp://{0}/{1}", serverIP, "/"));
                FtpWebRequest ftpRequest = (FtpWebRequest)FtpWebRequest.Create(uri);
                ftpRequest.Credentials = new NetworkCredential(userId, passWord);
                ftpRequest.Method = WebRequestMethods.Ftp.PrintWorkingDirectory;
                FtpWebResponse ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                ftpResponse.Close();
                IsNetConnected = true;
                return true;
            }
            catch (Exception)
            {
                IsNetConnected = false;
                return false;
            }
        }

        /// <summary>
        /// 文件上传
        /// </summary>
        /// <param name="sourceFullPath">要上传文件全名</param>
        /// <param name="targetPath">服务器端地址(temp)</param>
        /// <returns></returns>
        public bool UploadFile(string sourceFullPath, string targetPath)
        {
            FtpWebRequest reqFTP = null;
            FileStream fs = null;
            Stream strm = null;

            FileInfo fileInf = new FileInfo(sourceFullPath);
            string fileName = sourceFullPath.Substring(sourceFullPath.LastIndexOf("\\") + 1);

            //远端存在该文件时，先删除
            if (FileExist(targetPath, fileName))
            {
                DeleteFile(targetPath + "/" + fileName);
            }

            Uri uri = new Uri("ftp://" + serverIP + ":" + serverPort + "/" + targetPath + "/" + Uri.EscapeDataString(fileName));
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);
            reqFTP.Credentials = new NetworkCredential(userId, passWord);
            reqFTP.KeepAlive = false;
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            reqFTP.UseBinary = true;
            reqFTP.UsePassive = true;
            reqFTP.ContentLength = fileInf.Length;
            byte[] buff = new byte[2048];
            int contentLen = 0;
            fs = fileInf.OpenRead();
            try
            {
                strm = reqFTP.GetRequestStream();
                while ((contentLen = fs.Read(buff, 0, buff.Length)) != 0)
                {
                    strm.Write(buff, 0, contentLen);
                }
                fs.Close();
                strm.Close();
                return true;
            }
            catch (Exception ex)
            {
                fs.Close();
                strm.Close();
                //throw new Exception("上传文件失败，原因： " + ex.Message);
                return false;
            }
        }

        /// <summary>
        /// 文件下载
        /// </summary>
        /// <param name="filePath">文件本地存放路径</param>
        /// <param name="serverPath">远端文件路径</param>
        /// <param name="fileName">文件名</param>
        /// <returns>bool</returns>
        public bool DownloadFile(string sourceFullPath, string targetFullPath)
        {
            FtpWebRequest ftpRequest = null;
            FileStream outputStream = null;
            FtpWebResponse response = null;
            Stream ftpStream = null;

            try
            {
                string fileName = sourceFullPath.Substring(sourceFullPath.LastIndexOf("/") + 1);
                if (Directory.Exists(targetFullPath) == false)
                    Directory.CreateDirectory(targetFullPath);
                outputStream = new FileStream(targetFullPath + "\\" + fileName, FileMode.Create);
                Uri uri = new Uri("ftp://" + serverIP + "/" + sourceFullPath);
                ftpRequest = (FtpWebRequest)FtpWebRequest.Create(uri);
                ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.Proxy = null;
                ftpRequest.Credentials = new NetworkCredential(userId, passWord);
                response = (FtpWebResponse)ftpRequest.GetResponse();
                ftpStream = response.GetResponseStream();
                int readCount = 0;
                byte[] buffer = new byte[2048];

                while ((readCount = ftpStream.Read(buffer, 0, buffer.Length)) > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                }
                outputStream.Close();
                ftpStream.Close();
                response.Close();
                return true;
            }
            catch (Exception ex)
            {
                outputStream.Close();
                ftpStream.Close();
                response.Close();
                //throw new Exception("下载文件失败，原因： " + ex.Message);
                return false;
            }
        }

        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="fileName"></param>
        public void DeleteFile(string fileName)
        {
            try
            {
                Uri uri = new Uri("ftp://" + serverIP + "/" + fileName);
                FtpWebRequest reqFTP;
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);

                reqFTP.Credentials = new NetworkCredential(userId, passWord);
                reqFTP.KeepAlive = false;
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
                reqFTP.UsePassive = false;

                string result = String.Empty;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                long size = response.ContentLength;
                Stream datastream = response.GetResponseStream();
                StreamReader sr = new StreamReader(datastream);
                result = sr.ReadToEnd();
                sr.Close();
                datastream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                throw new Exception("文件删除失败！" + ex.Message);
            }
        }

        /// <summary>
        /// 删除文件夹
        /// </summary>
        /// <param name="folderName"></param>
        public void RemoveDirectory(string folderName)
        {
            try
            {
                Uri uri = new Uri("ftp://" + serverIP + "/" + folderName);
                FtpWebRequest reqFTP;
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);

                reqFTP.Credentials = new NetworkCredential(userId, passWord);
                reqFTP.KeepAlive = false;
                reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
                reqFTP.UsePassive = false;

                string result = String.Empty;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                long size = response.ContentLength;
                Stream datastream = response.GetResponseStream();
                StreamReader sr = new StreamReader(datastream);
                result = sr.ReadToEnd();
                sr.Close();
                datastream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                throw new Exception("文件夹删除失败！" + ex.Message);
            }
        }

        /// <summary>
        /// 获取当前目录下明细(包含文件和文件夹)
        /// </summary>
        /// <param name="ServerPath">远端的地址</param>
        /// <param name="WRMethods">
        /// <returns></returns>
        /// 
        private string[] GetFileList(string ServerPath, string WRMethods)
        {
            StringBuilder result = null;
            FtpWebRequest ftp = null;
            WebResponse response = null;
            StreamReader reader = null;

            try
            {
                result = new StringBuilder();
                Uri uri = new Uri("ftp://" + serverIP + "/" + ServerPath);
                ftp = (FtpWebRequest)FtpWebRequest.Create(uri);
                ftp.Credentials = new NetworkCredential(userId,passWord);
                ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                ftp.UsePassive = true;
                response = ftp.GetResponse();
                reader = new StreamReader(response.GetResponseStream(), Encoding.Default);
                string line = reader.ReadLine();
                while (line != null)
                {
                    result.Append(line);
                    result.Append("\n");
                    line = reader.ReadLine();
                } 
                if (result.ToString() != "")
                {
                    result.Remove(result.ToString().LastIndexOf("\n"), 1);
                }
                reader.Close();
                response.Close();
                return result.ToString().Split('\n');
            }
            catch (Exception ex)
            {
                throw new Exception("获取文件列表失败，原因： " + ex.Message);
            }
        }

        /// <summary>
        /// 获得文件列表
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        /// 
        public string[] GetFileNameList(string dirName)
        {
            string[] drectory = GetFileList(dirName, WebRequestMethods.Ftp.ListDirectoryDetails);
            List<string> strList = new List<string>();
            if (drectory.Length > 0)
            {
                foreach (string str in drectory)
                {
                    if (str.Trim().Length == 0)
                        continue;
                    //会有两种格式的详细信息返回
                    //一种包含<DIR>
                    //一种第一个字符串是drwxerwxx这样的权限操作符号
                    //现在写代码包容两种格式的字符串
                    if (!str.Trim().Contains("<DIR>"))
                    {
                        strList.Add(str.Substring(str.LastIndexOf(":") + 4).Trim()) ;
                    }
                    else
                    {
                        if (str.Trim().Substring(0, 1).ToUpper() != "D")
                        {
                            strList.Add(str.Substring(str.LastIndexOf(":") + 1).Trim()) ;
                        }
                    }
                }
            }
            return strList.ToArray();
        }

        /// <summary>
        /// 获取文件夹下明细
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public string[] GetFilesDetailList(string dirName)
        {
            return GetFileList(dirName, WebRequestMethods.Ftp.ListDirectoryDetails);
        }

        /// <summary>
        /// 获取目录列表
        /// </summary>
        /// <param name="dirName">远端的地址</param>
        /// <returns></returns>
        /// 
        public string[] GetDirectoryList(string dirName)
        {
            string[] drectory = GetFileList(dirName, WebRequestMethods.Ftp.ListDirectoryDetails);
            List<string> strList = new List<string>();
            if (drectory.Length > 0)
            {
                foreach (string str in drectory)
                {
                    if (str.Trim().Length == 0)
                        continue;
                    //会有两种格式的详细信息返回
                    //一种包含<DIR>
                    //一种第一个字符串是drwxerwxx这样的权限操作符号
                    //现在写代码包容两种格式的字符串
                    if (str.Trim().Contains("<DIR>"))
                    {
                        strList.Add(str.Substring(39).Trim());
                    }
                    else
                    {
                        if (str.Trim().Substring(0, 1).ToUpper() == "D")
                        {
                            strList.Add(str.Substring(55).Trim());
                        }
                    }
                }
            }
            return strList.ToArray();
        }

        /// <summary>
        /// 判断当前目录下指定的子目录是否存在
        /// </summary>
        /// <param name="RemoteDirectoryName">指定的目录名</param>
        public bool DirectoryExist(string rootDir, string RemoteDirectoryName)
        {
            string[] dirList = GetDirectoryList(rootDir);//获取子目录
            if (dirList.Length > 0)
            {
                foreach (string str in dirList)
                {
                    if (str.Trim() == RemoteDirectoryName.Trim())
                    {
                        return true;
                    }
                }
            }
            return false;
        }

        /// <summary>
        /// 判断目录下指定的文件是否存在
        /// </summary>
        /// <param name="rootDir">远端目录</param>
        /// <param name="fileName">指定文件</param>
        /// <returns></returns>
        public bool FileExist(string rootDir, string fileName)
        {
            string[] fileList = GetFileNameList(rootDir);
            if (fileList.Length > 0)
            {
                foreach (string file in fileList)
                {
                    if (file.Substring(file.LastIndexOf("/") + 1) == fileName)
                    {
                        return true;
                    }
                }
            }
            return false;
        }

        /// <summary>
        /// 创建目录
        /// </summary>
        /// <param name="dirName"></param>
        public void MakeDir(string dirName)
        {
            FtpWebRequest reqFTP;
            try
            {
                Uri uri = new Uri("ftp://" + serverIP + "/" + dirName);
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
                reqFTP.UseBinary = true;
                reqFTP.UsePassive = true;
                reqFTP.Credentials = new NetworkCredential(userId,passWord);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show("创建文件失败，原因： " + ex.Message);
            }
        }

        /// <summary>
        /// 重命名
        /// </summary>
        /// <param name="currentFilename"></param>
        /// <param name="newFilename"></param>
        public void ReName(string currentFilename, string newFilename)
        {
            FtpWebRequest reqFTP;
            try
            {
                Uri uri = new Uri("ftp://" + serverIP + "/" + currentFilename);
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);
                reqFTP.Method = WebRequestMethods.Ftp.Rename;
                reqFTP.RenameTo = newFilename;
                reqFTP.UseBinary = true;
                reqFTP.UsePassive = false;
                reqFTP.Credentials = new NetworkCredential(userId,passWord);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();

                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                throw new Exception("FtpHelper ReName Error --> " + ex.Message);
            }
        }

        /// <summary>
        /// 移动文件
        /// </summary>
        /// <param name="currentFilename"></param>
        /// <param name="newFilename"></param>
        public void MovieFile(string currentFilename, string newDirectory)
        {
            ReName(currentFilename, newDirectory);
        }

    }
}