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

namespace UAS_MES_NEW.PublicMethod
{
    class ftpOperater
    {
        //从配置文件读取FTP信息
        public static string FTPAddress = Properties.Settings.Default.Properties["FTPAddress"].DefaultValue.ToString().Split('|')[0];

        public static string DownLoadTo = Environment.GetEnvironmentVariable("windir").Substring(0, 1) + @":\" + @"打印标签\";

        private string FTPInf;
        private string ftpServerIP;
        private string ftpUser;
        private string ftpPwd;
        bool status = false;

        public ftpOperater()
        {
            //string[] FTPInf = Properties.Settings.Default.Properties["FTPAddress"].DefaultValue.ToString().Split('|');
            //this.ftpServerIP = FTPInf[0];
            //this.ftpUser = FTPInf[1];
            //this.ftpPwd = FTPInf[2];
             string FTPInf = Properties.Settings.Default.Properties["FTPAddress"].DefaultValue.ToString();
           
            //连接共享文件夹
            status = BaseUtil.connectState(FTPInf);

        }
        #region
        public void UpLoadFile(string filepath, string filename)
        {
            //上传之前判断文件是否存在
            string[] filelist = GetFileList();
            if (filelist != null)
                for (int i = 0; i < filelist.Length; i++)
                {
                    if (filelist[i] == filename)
                    {
                        string upload = MessageBox.Show("已存在同名文件，是否覆盖", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question).ToString();
                        if (upload.ToString() != "Yes")
                        {
                            return;
                        }
                    }
                }
            FtpWebRequest reqFTP;
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpServerIP + "/" + filename));
            reqFTP.UseBinary = true;
            reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            FileInfo file = new FileInfo(filepath + "/" + filename);
            const int BufferSize = 2048;
            byte[] content = new byte[BufferSize - 1 + 1];
            int dataRead;
            using (FileStream fs = file.OpenRead())
            {
                //把上传的文件写入流
                using (Stream rs = reqFTP.GetRequestStream())
                {
                    do
                    {
                        //每次读文件流的2KB
                        dataRead = fs.Read(content, 0, BufferSize);
                        rs.Write(content, 0, dataRead);
                    } while (!(dataRead < BufferSize));
                    rs.Close();
                }
                fs.Close();
            }
        }
        #endregion


        public void UpLoadFile(string filepath, string filename,string savepath)
        {
            if (status)
            {
                //目标路径
                string targetPath = savepath;
                //var file = Directory.GetFiles(targetPath);
                string sourceFile = Path.Combine(filepath + @"\", filename);
                string destFile = Path.Combine(targetPath + @"\", filename);
                //获取指定路径下的全部文件名
                var file = Directory.GetFiles(targetPath);
                string overwrite = "";
                for (int i = 0; i < file.Length; i++)
                {
                    if (file[i].Substring(file[i].LastIndexOf(@"\") + 1) == filename)
                    {
                        overwrite = MessageBox.Show("已存在名为" + filename + "的文件,是否覆盖", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question).ToString();
                        break;
                    }
                }
                if (overwrite == "Yes" || overwrite == "")
                {
                    //不存在文件的话进行创建
                    if (!Directory.Exists(targetPath))
                        Directory.CreateDirectory(targetPath);
                    //将文件复制到指定位置
                    File.Copy(sourceFile, destFile, true);
                }
                //string sourceFile = Path.Combine(filepath+@"\", filename);
                ////共享文件夹的目录
                //DirectoryInfo theFolder = new DirectoryInfo(savepath);
                ////获取保存文件的路径
                //string fielpath = theFolder.ToString() + @"\";
                ////执行方法
                //BaseUtil.Transport(sourceFile, fielpath, filename);
            }
            else
            {
                //ListBox1.Items.Add("未能连接！");
                MessageBox.Show("共享文件连接错误");
            }
         
        }

        /// <summary>
        /// 获取ftp服务器上的文件信息
        /// </summary>
        /// <returns>存储了所有文件信息的字符串数组</returns>
        public string[] GetFileList()
        {
            string[] downloadFiles;
            StringBuilder result = new StringBuilder();
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpServerIP + "/"));
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());

                string line = reader.ReadLine();
                while (line != null)
                {
                    result.Append(line);
                    result.Append("\n");
                    line = reader.ReadLine();
                }
                result.Remove(result.ToString().LastIndexOf('\n'), 1);
                reader.Close();
                response.Close();
                return result.ToString().Split('\n');
            }
            catch (Exception ex)
            {
                System.Windows.Forms.MessageBox.Show("获取文件信息失败:" + ex.Message, "操作失败", MessageBoxButtons.OK, MessageBoxIcon.Error);
                downloadFiles = null;
                return downloadFiles;
            }
        }

        //获取指定的文件的内容
        public string GetFileContent(string filename)
        {
            FtpWebRequest reqFTP;
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpServerIP + "/" + filename));
            reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
            reqFTP.UseBinary = true;
            reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);

            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

            Stream ftpStream = response.GetResponseStream();

            int bufferSize = GetFileContentLength(filename);
            byte[] buffer = new byte[bufferSize];
            ftpStream.Read(buffer, 0, bufferSize);
            ftpStream.Close();
            return Encoding.Default.GetString(buffer);
        }

        //获取指定文件的内容的字节长度
        public int GetFileContentLength(string filename)
        {
            FtpWebRequest reqFTP;
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpServerIP + "/" + filename));
            reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
            reqFTP.UseBinary = true;
            reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);

            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

            Stream ftpStream = response.GetResponseStream();

            List<byte> buf = new List<byte>();
            while (ftpStream.ReadByte() != -1)
            {
                buf.Add((byte)ftpStream.ReadByte());
            }
            ftpStream.Close();
            return buf.ToArray().Length * 2;
        }

        /// <summary>
        /// 获取FTP上指定文件的大小
        /// </summary>
        /// <param name="filename">文件名</param>
        /// <returns>文件大小</returns>
        public long GetFileSize(string filename)
        {
            FtpWebRequest reqFTP;
            long fileSize = 0;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpServerIP + "/" + filename));
                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                fileSize = response.ContentLength;

                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show("获取文件大小时，出现异常:\n" + ex.Message, "获取文件大小失败！", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            return fileSize;
        }

        /// <summary>
        /// 实现ftp下载操作
        /// </summary>
        /// <param name="fileName">远程文件名</param>
        public string Download(string fileName)
        {
            FtpWebRequest reqFTP;
            try
            {
                FileStream outputStream = new FileStream(DownLoadTo + @"\" + fileName, FileMode.Create);
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpServerIP + "/" + fileName));
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
                reqFTP.UsePassive = true;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                long cl = response.ContentLength;
                int bufferSize = 2048;
                int readCount;
                byte[] buffer = new byte[bufferSize];

                readCount = ftpStream.Read(buffer, 0, bufferSize);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
                ftpStream.Close();
                outputStream.Close();
                response.Close();
                return DownLoadTo + @"\" + fileName;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                return "";
            }
        }


        public string DownLoadFromSharePath(string URL,string fileName)
        {
            //目标路径
            string targetPath = FTPInf;
            //var file = Directory.GetFiles(targetPath);
            string sourceFile = Path.Combine(URL);
            string destFile = Path.Combine(DownLoadTo, fileName);
            //不存在文件的话进行创建
            if (!Directory.Exists(DownLoadTo))
            Directory.CreateDirectory(DownLoadTo);
            //将文件复制到指定位置
            try
            {
                File.Copy(sourceFile, destFile, true);
            }
            catch {
                MessageBox.Show("标签文件更新失败，不在指定维护路径"+ URL + "中或已被占用","提示",MessageBoxButtons.OK,MessageBoxIcon.Warning);
            }
            return destFile;
        }

        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="fileName"></param>
        public void Delete(string fileName)
        {
             try
             {
                 FtpWebRequest reqFTP;
                 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpServerIP + "/" + fileName));
                 reqFTP.KeepAlive = false;
                 reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
                reqFTP.UsePassive = true;
                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();
                 //Buffer.Log(string.Format("Ftp文件{1}删除成功！", DateTime.Now.ToString(), fileName));
             }
             catch (Exception ex)
             {
                 throw ex;
             }
         }       
    }
}