using Renci.SshNet;
using Renci.SshNet.Sftp;
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using static System.Collections.Specialized.BitVector32;

namespace HandleUtils
{
    public class SFTPHelper
    {
        #region 字段或属性

        private SftpClient _sftp;

        /// <summary>
        /// SFTP连接状态
        /// </summary>
        public bool Connected => _sftp.IsConnected;

        #endregion

        #region 构造
        /// <summary>
        /// 构造
        /// </summary>
        /// <param name="ip">IP</param>
        /// <param name="port">端口</param>
        /// <param name="user">用户名</param>
        /// <param name="pwd">密码</param>
        public SFTPHelper(string ip, string user, string pwd, int port = 22)
        {
            _sftp = new SftpClient(ip, port, user, pwd);
            Connect();
        }

        ~SFTPHelper()
        {
            Disconnect();
        }
        #endregion

        #region 连接SFTP
        /// <summary>
        /// 连接SFTP
        /// </summary>
        /// <returns>true成功</returns>
        public bool Connect()
        {
            try
            {
                if (!Connected)
                {
                    _sftp.Connect();
                }
                return true;
            }
            catch (Exception ex)
            {
                throw new Exception(string.Format("连接SFTP失败，原因：{0}", ex.Message));
            }
        }
        #endregion

        #region 断开SFTP
        /// <summary>
        /// 断开SFTP
        /// </summary> 
        public void Disconnect()
        {
            try
            {
                if (_sftp != null && Connected)
                {
                    _sftp.Disconnect();
                }
            }
            catch (Exception ex)
            {
                throw new Exception(string.Format("断开SFTP失败，原因：{0}", ex.Message));
            }
        }
        #endregion

        #region SFTP上传文件
        /// <summary>
        /// SFTP上传文件
        /// </summary>
        /// <param name="localPath">本地路径</param>
        /// <param name="remotePath">远程路径</param>
        public void Put(string localPath, string remotePath, string msg = "", Action<ulong> action = null)
        {
            try
            {
                using (var file = File.OpenRead(localPath))
                {
                    Connect();
                    _sftp.UploadFile(file, remotePath, action);
                    msg = "上传成功！";
                }
            }
            catch (Exception ex)
            {
                // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件上传失败，原因：{0}", ex.Message));
                //throw new Exception(string.Format("SFTP文件上传失败，原因：{0}", ex.Message));
                msg = ex.Message;
            }
            finally
            {
                Disconnect();
            }
        }
        #endregion

        #region SFTP获取文件
        /// <summary>
        /// SFTP获取文件
        /// </summary>
        /// <param name="remotePath">远程路径</param>
        /// <param name="localPath">本地路径</param>
        public void Get(string remotePath, string localPath)
        {
            try
            {
                Connect();
                var byt = _sftp.ReadAllBytes(remotePath);
                File.WriteAllBytes(localPath, byt);
            }
            catch (Exception ex)
            {
                // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件获取失败，原因：{0}", ex.Message));
                throw new Exception(string.Format("SFTP文件获取失败，原因：{0}", ex.Message));
            }
            finally
            {
                Disconnect();
            }

        }

        /// <summary>
        /// 获取全部文件
        /// </summary>
        /// <param name="remotePath"></param>
        /// <param name="localPath"></param>
        /// <exception cref="Exception"></exception>
        public void Mget(string remotePath, string localPath, Func<List<string>, bool> action = null)
        {
            try
            {
                Connect();
                var files = _sftp.ListDirectory(remotePath);
                var result = new List<string>();
                foreach (var file in files)
                {
                    if (file.Name.Contains("%LEXMK_SFTP_PRD%HUIWE_SFTP_PRD%BINARY%"))
                        continue;

                    using (var fs = File.OpenWrite(localPath + file.Name))
                    {
                        result.Add(file.Name);
                        _sftp.DownloadFile(file.FullName, fs);
                    }
                }

                action?.Invoke(result);
            }
            catch (Exception ex)
            {
                throw new Exception(string.Format("SFTP文件获取失败，原因：{0}", ex.Message));
            }
            finally
            {
                Disconnect();
            }
        }

        /// <summary>
        /// 下载文件
        /// </summary>
        /// <param name="remotePath"></param>
        /// <param name="localPath"></param>
        /// <exception cref="Exception"></exception>
        public void DownloadFile(string remotePath, string localPath, Action<ulong> action = null)
        {
            try
            {
                Connect();
                using (var fs = File.OpenWrite(localPath))
                {
                    _sftp.DownloadFile(remotePath, fs, action);
                }
            }
            catch (Exception ex)
            {
                throw new Exception(string.Format("SFTP下载文件失败，原因：{0}", ex.Message));
            }
            finally
            {
                Disconnect();
            }
        }

        #endregion


        #region 重命名SFTP文件
        /// <summary>
        /// 重命名SFTP文件 
        /// <param name="oldFile">旧远程路径</param>  
        /// <param name="newFile">新远程路径</param> 
        /// </summary>
        public void Rename_SFTP(string oldFilePath, string newFilePath)
        {
            try
            {
                Connect();
                _sftp.RenameFile(oldFilePath, newFilePath);
            }
            catch (Exception ex)
            {
                // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件删除失败，原因：{0}", ex.Message));
                throw new Exception(string.Format("SFTP文件删除失败，原因：{0}", ex.Message));
            }
            finally
            {
                Disconnect();
            }
        }
        #endregion

        #region 删除SFTP文件
        /// <summary>
        /// 删除SFTP文件 
        /// </summary>
        /// <param name="remoteFile">远程路径</param>
        public void Delete(string remoteFile)
        {
            try
            {
                Connect();
                _sftp.Delete(remoteFile);
            }
            catch (Exception ex)
            {
                // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件删除失败，原因：{0}", ex.Message));
                throw new Exception(string.Format("SFTP文件删除失败，原因：{0}", ex.Message));
            }
            finally
            {
                Disconnect();
            }
        }
        #endregion

        #region 获取SFTP文件列表
        /// <summary>
        /// 获取SFTP文件列表
        /// </summary>
        /// <param name="remotePath">远程目录</param>
        /// <returns></returns>
        public List<SftpFile> GetFileList(string remotePath)
        {
            try
            {
                var files = _sftp.ListDirectory(remotePath);
                return files.ToList();
            }
            catch (Exception ex)
            {
                throw new Exception(string.Format("SFTP文件列表获取失败，原因：{0}", ex.Message));
            }
            finally
            {
                Disconnect();
            }
        }


        /// <summary>
        /// 获取SFTP文件列表
        /// </summary>
        /// <param name="remotePath">远程目录</param>
        /// <param name="fileSuffix">文件后缀</param>
        /// <returns></returns>
        public List<string> GetFileList(string remotePath, string fileSuffix)
        {
            try
            {
                //Connect();
                var files = _sftp.ListDirectory(remotePath);
                var objList = new List<string>();
                foreach (var file in files)
                {
                    string name = file.Name;
                    if (name.Length > (fileSuffix.Length + 1) && fileSuffix == name.Substring(name.Length - fileSuffix.Length))
                    {
                        objList.Add(name);
                    }
                }
                return objList;
            }
            catch (Exception ex)
            {
                // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件列表获取失败，原因：{0}", ex.Message));
                throw new Exception(string.Format("SFTP文件列表获取失败，原因：{0}", ex.Message));
            }
            finally
            {
                Disconnect();
            }
        }
        #endregion

        #region 移动SFTP文件
        /// <summary>
        /// 移动SFTP文件
        /// </summary>
        /// <param name="oldRemotePath">旧远程路径</param>
        /// <param name="newRemotePath">新远程路径</param>
        public void Move(string oldRemotePath, string newRemotePath)
        {
            try
            {
                Connect();
                _sftp.RenameFile(oldRemotePath, newRemotePath);
            }
            catch (Exception ex)
            {
                // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("SFTP文件移动失败，原因：{0}", ex.Message));
                throw new Exception(string.Format("SFTP文件移动失败，原因：{0}", ex.Message));
            }
            finally
            {
                Disconnect();
            }
        }
        #endregion


    }
}