using Renci.SshNet;
using System;
using System.Collections;
using System.IO;
using System.Linq;
using System.Text;

namespace Tiobon.Core.OPS.Tool.OPS.Tool.Helper
{
    /// <summary>
    /// SFTP操作类
    /// </summary>
    public class SFTPHelper
    {
        #region 字段或属性
        private SftpClient sftp;
        /// <summary>
        /// SFTP连接状态
        /// </summary>
        public bool Connected { get { return 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 port, string user, string pwd)
        {
            sftp = new SftpClient(ip, Int32.Parse(port), user, pwd);
        }
        #endregion

        #region 连接SFTP
        /// <summary>
        /// 连接SFTP
        /// </summary>
        /// <returns>true成功</returns>
        public void Connect()
        {
            try
            {
                if (!Connected)
                {
                    sftp.Connect();
                }
            }
            catch (Exception ex)
            {
                throw new Exception(string.Format("连接SFTP失败，原因：{0}", ex.Message));
                // TxtLog.WriteTxt(CommonMethod.GetProgramName(), 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)
            {
                // TxtLog.WriteTxt(CommonMethod.GetProgramName(), string.Format("断开SFTP失败，原因：{0}", ex.Message));
                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 filename)
        {
            try
            {
                Connect();
                using (var file = File.OpenRead(localPath))
                {
                    if (!sftp.Exists(remotePath))
                    {
                        CreateDirectory(remotePath);
                    }
                    sftp.UploadFile(file, remotePath + "//" + filename);
                    Disconnect();
                }
            }
            catch (Exception ex)
            {
                string log = $"文件上传失败，原因：{ex.Message}";
                Const.write_log(log);
                throw new Exception(log);
            }
        }

        public void CreateDirectory(string path)
        {
            try
            {
                StringBuilder sb = new StringBuilder();
                var ff = path.Split('/');
                ff.ToList().ForEach(f =>
                {
                    sb.Append($"/{f}");
                    if (!sftp.Exists(sb.ToString()))
                    {
                        sftp.CreateDirectory(sb.ToString());
                    }
                });
            }
            catch (Exception ex)
            {
                string log = $"文件夹创建失败，原因：{ex.Message}";
                Const.write_log(log);
                throw new Exception(log);
            }

        }

        public int Put(string localPath, string remotePath, string filename, Action<ulong> action)
        {
            try
            {
                using (var file = File.OpenRead(localPath))
                {
                    if (!sftp.Exists(remotePath))
                    {
                        StringBuilder sb = new StringBuilder();
                        var ff = remotePath.Split('/');
                        ff.ToList().ForEach(f =>
                        {
                            sb.Append($"/{f}");
                            if (!sftp.Exists(sb.ToString()))
                            {
                                sftp.CreateDirectory(sb.ToString());
                            }
                        });
                    }
                    sftp.UploadFile(file, remotePath + filename, action);
                    return 1;
                }
            }
            catch (Exception ex)
            {
                string log = $"文件上传失败，原因：{ex.Message}";
                MessageBoxEx.Show(log);
                Const.write_log(log);
                return 0;
            }
        }
        #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 int Get(string remotePath, string localPath)
        {
            try
            {
                Connect();
                using (var file = File.OpenWrite(localPath))
                {
                    sftp.DownloadFile(remotePath, file);
                };
                Disconnect();
                return 1;
            }
            catch (Exception ex)
            {
                string log = $"文件下载失败，原因：{ex.Message}";
                MessageBoxEx.Show(log);
                Const.write_log(log);
                return 0;
            }

        }

        public int Get(string remotePath, string localPath, Action<ulong> action)
        {
            try
            {
                Connect();
                using (var file = File.OpenWrite(localPath))
                {
                    sftp.DownloadFile(remotePath, file, action);
                };
                Disconnect();
                return 1;
            }
            catch (Exception ex)
            {
                string log = $"文件下载失败，原因：{ex.Message}";
                MessageBoxEx.Show(log);
                Const.write_log(log);
                return 0;
            }

        }
        #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);
                Disconnect();
            }
            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));
            }
        }
        #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>
        /// <param name="fileSuffix">文件后缀</param>
        /// <returns></returns>
        public ArrayList GetFileList(string remotePath, string fileSuffix)
        {
            try
            {
                Connect();
                var files = sftp.ListDirectory(remotePath);
                Disconnect();
                var objList = new ArrayList();
                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));
            }
        }
        #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);
                Disconnect();
            }
            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));
            }
        }
        #endregion

        public bool Exists(string path)
        {
            Connect();
            var result = sftp.Exists(path);
            Disconnect();
            return result;
        }
    }
}