using FluentFTP;
using FluentFTP.Client.BaseClient;
using GameBackup3H3.DbOp;
using ryCommon;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Net;
using System.Text;
#pragma warning disable CA1031 // 不捕获常规异常类型
namespace FTPop
{
    /// <summary>
    /// FTP管理
    /// </summary>
    public class FTPFluentFTP : IFTP, IDisposable
    {
        private bool disposed = false;
        FtpClient conn;
        public string CurRemoteFolder { get; private set; } = "";
        FTPInfo _ftpinfo;
        private Encoding GetEncoding()
        {
            if (_ftpinfo.Encoding == "UTF8")
            { return Encoding.UTF8; }
            else
            { return Encoding.GetEncoding(_ftpinfo.Encoding); }
        }
        private void AppendText(string text, Color color)
        {
        }
        /// <summary>
        /// 打开FTP
        /// </summary>
        /// <param name="ftpinfo"></param>
        public int Open(FTPInfo ftpinfo)
        {
            if(ftpinfo==null)
            {
                return -1;
            }
            _ftpinfo = ftpinfo;
            conn = new FtpClient
            {
                Host = _ftpinfo.IP,
                Port = _ftpinfo.Port,
                Credentials = new NetworkCredential(_ftpinfo.UserName, _ftpinfo.Pwd)
            };
            conn.Config.ConnectTimeout = 35000;
            conn.Config.DataConnectionConnectTimeout = 35000;
            conn.Config.DataConnectionReadTimeout = 35000;
            conn.Config.ReadTimeout = 35000;
            conn.Config.DataConnectionType = FtpDataConnectionType.AutoPassive;
            
            conn.Config.SslProtocols = System.Security.Authentication.SslProtocols.Tls12;
            try
            {
                if (_ftpinfo.Encrypt > 0)
                {
                    conn.Config.EncryptionMode = _ftpinfo.Encrypt == 2 ? FtpEncryptionMode.Explicit : FtpEncryptionMode.Implicit;
                    conn.Config.ValidateAnyCertificate = true;
                    conn.ValidateCertificate += new FtpSslValidation(OnValidateCertificate);
                }
                
                conn.Config.DataConnectionEncryption = true;
                conn.Connect();
                if (conn.IsConnected)
                {
                    ChangeWorkingDirectory("");
                    //conn.DataConnectionType = FtpDataConnectionType.PASV;
                    //var ss= conn.GetListing();
                }
            }
            catch(Exception ex)
            {
                return -2;
            }
           return conn.IsConnected?1:0;
        }
        private void AsyncMethod()
        {
            //var kk = await conn.GetListingAsync();
        }
        private static void OnValidateCertificate(BaseFtpClient control, FtpSslValidationEventArgs e)
        {
            if (e.PolicyErrors != System.Net.Security.SslPolicyErrors.None)
            {
                // invalid cert, do you want to accept it?
                 e.Accept = true;
            }
            else
            {
                e.Accept = true;
            }
        }
        private bool ChangeWorkingDirectory(string Path)
        {
            if (Path == null || Path.Length == 0)
            {
                AppendText("Status : Directory Was Not Found\n", Color.Red);
                return false;
            }
            conn.SetWorkingDirectory(Path);
            CurRemoteFolder = Path;
            AppendText("Status : Current Working Directory is " + CurRemoteFolder + "\n", Color.Red);
            return true;
        }
        /// <summary>
        /// 关闭FTP
        /// </summary>
        /// <returns></returns>
        public int Close()
        {
            conn.Disconnect();
            conn.Dispose();
            return 1;
        }
        /// <summary>
        /// 移除文件
        /// </summary>
        /// <param name="remotePath"></param>
        /// <returns></returns>
        public int RemoveFiles(string remotePath)
        {
            conn.DeleteFile(remotePath);
            return 1;
        }
        /// <summary>
        /// 移动文件
        /// </summary>
        /// <param name="fromPath"></param>
        /// <param name="toPath"></param>
        /// <returns></returns>
        public int MoveFile(string fromPath, string toPath)
        {
            conn.Rename(fromPath, toPath);
            return 1;
        }
        /// <summary>
        /// 文件是否存在
        /// </summary>
        /// <param name="remotePath"></param>
        /// <returns></returns>
        public bool FileExists(string remotePath)
        {
            return conn.FileExists(remotePath);
        }
        /// <summary>
        /// 文件大小
        /// </summary>
        /// <param name="remotePath"></param>
        /// <returns></returns>
        public Int64 FileSize(string remotePath)
        {
            try
            {
                return conn.GetFileSize(remotePath);
            }
            catch { return -1; }
        }
        /// <summary>
        /// 文件最后修改时间
        /// </summary>
        /// <param name="remotePath"></param>
        /// <returns></returns>
        public DateTime FileLastWriteTime(string remotePath)
        {
            try
            {
                return conn.GetModifiedTime(remotePath);
            }
            catch { return new DateTime(2000,1,1); }
        }
        /// <summary>
        /// 文件信息
        /// </summary>
        /// <param name="remotePath"></param>
        /// <returns></returns>
        public RemoteFileInfo GetFileInfo(string remotePath)
        {
            try
            {
                return new RemoteFileInfo()
                {
                    LastWriteTime = conn.GetModifiedTime(remotePath),
                    Length = conn.GetFileSize(remotePath),
                    Name = System.IO.Path.GetFileName(remotePath),
                    IsDirectory = conn.DirectoryExists(remotePath)
                };
            }
            catch
            {
                return new RemoteFileInfo();
            }
        }
        /// <summary>
        /// 显示文件夹列表
        /// </summary>
        /// <param name="CurFolder"></param>
        /// <returns></returns>
        public List<RemoteFileInfo> ListDirectory(string CurFolder)
        {
            //var aa = conn.GetNameListing(CurFolder) ;
            List<RemoteFileInfo> list = new List<RemoteFileInfo>();
            conn.Encoding = GetEncoding();
            var list_conn= conn.GetListing(CurFolder.TrimEnd('/'));
            //var list_conn2 = conn.GetNameListing();
            for (int i = 0; i < list_conn.Length; i++)
            {
                var item = list_conn[i];
                list.Add(new RemoteFileInfo()
                {
                    FullName = item.FullName,
                    IsDirectory = item.Type== FtpObjectType.Directory,
                    Name = item.Name,
                    Length = item.Size,
                    LastWriteTime = item.Modified
                });
            }
            return list;
        }
        /// <summary>
        /// 上传
        /// </summary>
        /// <param name="localPath"></param>
        /// <param name="remotePath"></param>
        /// <returns></returns>
        public int Upload(string localPath, string remotePath)
        {
            try
            {
                Action<FtpProgress> progress = delegate (FtpProgress p)
                {
                    var progress2 = new FileTransferProgressEventArgs()
                    {
                        Cancel = false,
                        LocalPath = localPath,
                        FileProgress = p.Progress/100d,
                        IsComplete=p.Progress==100,
                        Speed=p.TransferSpeed
                    };
                    FileTransferProgress?.Invoke(this, progress2);
                    //if (progress2.Cancel) {p.=true ; }
                    if (p.Progress == 1)
                    {
                        // all done!
                    }
                    else
                    {
                        // percent done = (p.Progress * 100)
                    }
                };
                // upload a file with progress tracking
                var result= conn.UploadFile(localPath, remotePath, FtpRemoteExists.Overwrite, true, FtpVerify.None, progress);
                if (result == FtpStatus.Success)
                {
                    if (FileSize(remotePath) != RyFiles.GetFileSize(localPath))
                    {
                        ErrorMsg = "文件上传不完整";
                        return -1;
                    }
                    else
                    {
                        return 1;
                    }
                }
                return -2;
            }
            catch (Exception ex)
            {
                ErrorMsg = ex.Message;
                return -1;
            }
        }
        public string ErrorMsg { get; set; } = "";
        /// <summary>
        /// 文件传输事件
        /// </summary>
        public event FileTransferProgressEventHandler FileTransferProgress;
        ~FTPFluentFTP()
        {
            Dispose(false);
        }
        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }
        protected virtual void Dispose(bool disposing)
        {
            if (!this.disposed)
            {
                Close();
                // If disposing equals true, dispose all managed 
                // and unmanaged resources.
                if (disposing)
                {
                    // Dispose managed resources.
                }
                // Release unmanaged resources. If disposing is false, 
                // only the following code is executed.
                // Note that this is not thread safe.
                // Another thread could start disposing the object
                // after the managed resources are disposed,
                // but before the disposed flag is set to true.
                // If thread safety is necessary, it must be
                // implemented by the client.
            }
            disposed = true;
        }
    }
}