using Cowain.Bake.Common.Core;
using FluentFTP;
using System;
using System.IO;

namespace Cowain.Bake.Communication.FTP
{
    //现在是的是短连接，即上传完就关闭; 后期如果有效率上的要求，要改成长连接，就是过程中不关闭连接
    //建立好连接，约：700毫秒
    //关闭连接，约：90毫秒
    //全部都是远程操作
    public class FtpHelper
    {
        #region 属性与构造函数
        public FtpClient ftpClient { get; set; } ///
        public string IpAddr { get; set; } /// IP地址
        public string RelatePath { get; set; } /// 相对路径
        public int Port { get; set; }        /// 端口号
        public string UserName { get; set; }  /// 用户名
        public string Password { get; set; }  /// 密码
        public bool IsConnected { get; set; } = false;

        //https://blog.csdn.net/fengershishe/article/details/129140618

        public FtpHelper(string ipAddr, int port, string userName, string password, string relatePath = "")
        {
            this.IpAddr = ipAddr;
            this.Port = port;
            this.UserName = userName;
            this.Password = password;
            //this.RelatePath = relatePath;
        }
        #endregion

        public bool Connect()
        {
            try
            {
                Close();
                //using (var ftpClient = new FtpClient(this.IpAddr, this.UserName, this.Password, this.Port))
                ftpClient = new FtpClient(this.IpAddr, this.Port);
                ftpClient.Connect();  // 连接到FTP服务器     
            }
            catch (Exception ex)
            {
                LogHelper.Instance.Error($"Ftp Connect {ex.Message}");
                IsConnected = false;
                return false;
            }

            IsConnected = ftpClient.IsConnected;
            return IsConnected;
        }

        bool IsConnect()
        {
            if (null == ftpClient || !ftpClient.IsConnected || !IsConnected)
            {
                Connect();
            }

            return IsConnected;
        }

        public void Close()
        {
            if (null != ftpClient)
            {
                ftpClient.Disconnect();
                ftpClient.Dispose();
                ftpClient = null;
            }
        }

        ~FtpHelper()
        {
            Close();
        }

        #region 方法
        public FtpListItem[] ListDir()
        {
            FtpListItem[] lists = null;
            if (IsConnect())
            {
                ftpClient.SetWorkingDirectory(this.RelatePath);
                lists = ftpClient.GetListing(); //当前路径下，返回所有文件    
            }
            return lists;
        }

        // 上传文件
        public bool UpLoad(string srcFilePath, string descPath)
        {
            string descFilePath = null; 
            try
            {
                if (IsConnect())
                {
                    string fileName = Path.GetFileName(srcFilePath);
                    char lastChar = descPath[descPath.Length - 1];

                    if ('\\' == lastChar 
                        || '/' == lastChar)
                    {
                        descFilePath = descPath + fileName;       //descPath, 最后一个，是"/"
                    }
                    else
                    {
                        descFilePath = descPath + "/"  + fileName;       //descPath, 最后一个，是"/"
                    }
                   
                    FtpStatus result = ftpClient.UploadFile(srcFilePath, descFilePath); // ("local/file.txt", "remote/file.txt");
                    return FtpStatus.Success == result ? true : false;
                }
            }
            catch (Exception ex)
            {
                IsConnected = false;
                LogHelper.Instance.Error($"Ftp UpLoad {ex.Message}");
            }

            return false;
        }

        ///创建目录(远程创建)
        private bool CheckDirIsExists(string dir)
        {
            bool flag = false;
            try
            {
                if (IsConnect())
                {
                    ftpClient.SetWorkingDirectory(this.RelatePath);
                    flag = ftpClient.DirectoryExists(dir);
                    if (!flag)
                    {
                        flag = ftpClient.CreateDirectory(dir); //client.CreateDirectory("remote/directory");
                        return flag;
                    }
                }

                return flag;
            }
            catch (Exception ex)
            {
                IsConnected = false;
                LogHelper.Instance.Error($"Ftp CheckDirIsExists {ex.Message}");
            }
            return false;
        }

        public bool DeleteFile(string dir)
        {
            try
            {
                if (IsConnect())
                {
                    ftpClient.SetWorkingDirectory(this.RelatePath);
                    ftpClient.DeleteFile(dir);
                    return true;
                }
            }
            catch (Exception ex)
            {
                IsConnected = false;
                LogHelper.Instance.Error($"Ftp DeleteFile {ex.Message}");
            }
            return false;
        }

        public bool DownloadFile(string localAddress, string remoteAddress)
        {
            try
            {
                if (IsConnect())
                {
                    ftpClient.SetWorkingDirectory(this.RelatePath);
                    FtpStatus status = ftpClient.DownloadFile(localAddress, remoteAddress);
                    return status == FtpStatus.Success ? true : false;
                }
            }
            catch (Exception ex)
            {
                IsConnected = false;
                LogHelper.Instance.Error($"Ftp DownloadFile {ex.Message}");
            }

            return false;
        }
        #endregion
    }
}