using System;
using Tamir.SharpSsh;
using System.Collections;
using System.IO;
 
namespace Dizzy
{
 
	public class SFTPConnection
	{
 
		public Sftp sftp;
		string user;
		public delegate void SFTPEvent (string src, string dest, int transferredBytes,
		                                int totalBytes, string message);
 
		public event SFTPEvent TransferStarted;
		public event SFTPEvent TransferProgress;
		public event SFTPEvent TransferStopped;
 
		public delegate void Del (string src, string dest,
		                          int transferredBytes, int totalBytes, string message);
 
		public SFTPConnection (string user, string password)
		{
 
			// Inizializziamo il protocollo
			this.user = user;
			this.sftp = new Sftp ("poisson.phc.unipi.it", user);
			this.sftp.Password = password;
 
			this.sftp.OnTransferStart += new FileTransferEvent(this.TransferStartedHandler);
			this.sftp.OnTransferProgress += new FileTransferEvent(this.TransferProgressHandler);
			this.sftp.OnTransferEnd += new FileTransferEvent(this.TransferStoppedHandler);
 
		}
 
		public void Abort () {
			this.sftp.Cancel ();
		}
 
		private void TransferStartedHandler(string src, string dest, int transferredBytes,
		                                    int totalBytes, string message)
		{
			if(TransferStarted != null)
				TransferStarted(src, dest, transferredBytes, totalBytes, message);
		}
 
		private void TransferProgressHandler(string src, string dest, int transferredBytes,
		                                    int totalBytes, string message)
		{
			if (TransferProgress != null)
				TransferProgress(src, dest, transferredBytes, totalBytes, message);
		}
 
		private void TransferStoppedHandler(string src, string dest, int transferredBytes,
		                                    int totalBytes, string message)
		{
			if (TransferStopped != null)
				TransferStopped(src, dest, transferredBytes, totalBytes, message);
		}
 
		public void Connect()
		{
			sftp.Connect (22);
		}
 
		public ArrayList SearchFiles()
		{
			ArrayList matches = new ArrayList ();
			Console.WriteLine(" => Scan della nobackup");
			// ArrayList users = sftp.GetFileList ("/nobackup/");
			ArrayList users = new ArrayList();
			users.Add("robol");
			users.Add("bianchi");
			foreach(string folder in users)
			{
				if (folder == ".")
					continue;
				else if (folder == "..")
					continue;
				Console.WriteLine(" => Scan di {0}", folder);
				try {  matches.AddRange (GetFolderContent(folder)); }
				catch(Exception e) { Console.WriteLine (e.Message); }
			}
			Console.WriteLine(" => Scan terminato");
			return matches;
		}
 
		protected ArrayList GetFolderContent(string folder)
		{
			ArrayList matches, files;
			File f;
			string user;
			files = sftp.GetFileList("/nobackup/" + folder + "/");
			matches = new ArrayList ();
			foreach(string entry in files)
			{
				// Controllo che non sia una cartella. Evidentemente
				// questo metodo non è affidabile, ma per ora è il meglio
				// che SFTP ci permetta di fare.
				if(entry.IndexOf(".") == -1)
					matches.AddRange(GetFolderContent(folder + "/" + entry));
				else if(!entry.StartsWith("."))
				{
					user = folder;
					if(user.Contains("/"))
						user = user.Substring(0, user.IndexOf("/"));
					f = new File("/nobackup/" + folder + "/" + entry, user );
					matches.Add(f);
				}
			}
			return matches;
		}
 
		public void Download(File f, string downloadFolder)
		{
			this.sftp.Get (f.path, downloadFolder + Path.DirectorySeparatorChar +  f.name);
		}
 
		public void Upload(string filename)
		{
			this.sftp.Put(filename, "/nobackup/" + this.user + "/");
		}
 
		public void Disconnect ()
		{
			sftp.Close ();
		}
	}
 
 
}