using System;
using System.Collections.Generic;
using System.IO;
using System.Net;

namespace Ftp {
	public class Client {
		private string password;
		private string userName;
		private string uri;
		private int bufferSize = 1024;

		public bool Passive = true;
		public bool Binary = true;
		public bool EnableSsl = false;
		public bool Hash = false;

		public Client(string uri, string userName, string password) {
			this.uri = uri;
			this.userName = userName;
			this.password = password;
		}

		public string AppendFile(string source, string destination) {
			var request = createRequest(combine(uri, destination), WebRequestMethods.Ftp.AppendFile);

			using (var stream = request.GetRequestStream()) {
				using (var fileStream = System.IO.File.Open(source, FileMode.Open)) {
					int num;

					byte[] buffer = new byte[bufferSize];

					while ((num = fileStream.Read(buffer, 0, buffer.Length)) > 0) {
						if (Hash)
							Console.Write("#");

						stream.Write(buffer, 0, num);
					}
				}
			}

			return getStatusDescription(request);
		}

		public string ChangeWorkingDirectory(string path) {
			uri = combine(uri, path);

			return PrintWorkingDirectory();
		}

		public string DeleteFile(string fileName) {
			var request = createRequest(combine(uri, fileName), WebRequestMethods.Ftp.DeleteFile);

			return getStatusDescription(request);
		}

		public string DownloadFile(string source, string dest) {
			var request = createRequest(combine(uri, source), WebRequestMethods.Ftp.DownloadFile);

			byte[] buffer = new byte[bufferSize];

			using (var response = (FtpWebResponse)request.GetResponse()) {
				using (var stream = response.GetResponseStream()) {
					using (var fs = new FileStream(dest, FileMode.OpenOrCreate)) {
						int readCount = stream.Read(buffer, 0, bufferSize);

						while (readCount > 0) {
							if (Hash)
								Console.Write("#");

							fs.Write(buffer, 0, readCount);
							readCount = stream.Read(buffer, 0, bufferSize);
						}
					}
				}

				return response.StatusDescription;
			}
		}

		public DateTime GetDateTimestamp(string fileName) {
			var request = createRequest(combine(uri, fileName), WebRequestMethods.Ftp.GetDateTimestamp);

			using (var response = (FtpWebResponse)request.GetResponse()) {
				return response.LastModified;
			}
		}

		public long GetFileSize(string fileName) {
			var request = createRequest(combine(uri, fileName), WebRequestMethods.Ftp.GetFileSize);

			using (var response = (FtpWebResponse)request.GetResponse()) {
				return response.ContentLength;
			}
		}

		public string[] ListDirectory() {
			var list = new List<string>();

			var request = createRequest(WebRequestMethods.Ftp.ListDirectory);

			using (var response = (FtpWebResponse)request.GetResponse()) {
				using (var stream = response.GetResponseStream()) {
					using (var reader = new StreamReader(stream, true)) {
						while (!reader.EndOfStream) {
							list.Add(reader.ReadLine());
						}
					}
				}
			}

			return list.ToArray();
		}

		public string[] ListDirectoryDetails() {
			var list = new List<string>();

			var request = createRequest(WebRequestMethods.Ftp.ListDirectoryDetails);

			using (var response = (FtpWebResponse)request.GetResponse()) {
				using (var stream = response.GetResponseStream()) {
					using (var reader = new StreamReader(stream, true)) {
						while (!reader.EndOfStream) {
							list.Add(reader.ReadLine());
						}
					}
				}
			}

			return list.ToArray();
		}

		public string MakeDirectory(string directoryName) {
			var request = createRequest(combine(uri, directoryName), WebRequestMethods.Ftp.MakeDirectory);

			return getStatusDescription(request);
		}

		public string PrintWorkingDirectory() {
			var request = createRequest(WebRequestMethods.Ftp.PrintWorkingDirectory);

			return getStatusDescription(request);
		}

		public string RemoveDirectory(string directoryName) {
			var request = createRequest(combine(uri, directoryName), WebRequestMethods.Ftp.RemoveDirectory);

			return getStatusDescription(request);
		}

		public string Rename(string currentName, string newName) {
			var request = createRequest(combine(uri, currentName), WebRequestMethods.Ftp.Rename);

			request.RenameTo = newName;

			return getStatusDescription(request);
		}

		public string UploadFile(string source, string destination) {
			var request = createRequest(combine(uri, destination), WebRequestMethods.Ftp.UploadFile);

			using (var stream = request.GetRequestStream()) {
				using (var fileStream = System.IO.File.Open(source, FileMode.Open)) {
					int num;

					byte[] buffer = new byte[bufferSize];

					while ((num = fileStream.Read(buffer, 0, buffer.Length)) > 0) {
						if (Hash)
							Console.Write("#");

						stream.Write(buffer, 0, num);
					}
				}
			}

			return getStatusDescription(request);
		}

		public string UploadFileWithUniqueName(string source) {
			var request = createRequest(WebRequestMethods.Ftp.UploadFileWithUniqueName);

			using (var stream = request.GetRequestStream()) {
				using (var fileStream = System.IO.File.Open(source, FileMode.Open)) {
					int num;

					byte[] buffer = new byte[bufferSize];

					while ((num = fileStream.Read(buffer, 0, buffer.Length)) > 0) {
						if (Hash)
							Console.Write("#");

						stream.Write(buffer, 0, num);
					}
				}
			}

			using (var response = (FtpWebResponse)request.GetResponse()) {
				return Path.GetFileName(response.ResponseUri.ToString());
			}
		}

		private FtpWebRequest createRequest(string method) {
			return createRequest(uri, method);
		}

		private FtpWebRequest createRequest(string uri, string method) {
			var r = (FtpWebRequest)WebRequest.Create(uri);

			r.Credentials = new NetworkCredential(userName, password);
			r.Method = method;
			r.UseBinary = Binary;
			r.EnableSsl = EnableSsl;
			r.UsePassive = Passive;

			return r;
		}

		private string getStatusDescription(FtpWebRequest request) {
			using (var response = (FtpWebResponse)request.GetResponse()) {
				return response.StatusDescription;
			}
		}

		private string combine(string path1, string path2) {
			return Path.Combine(path1, path2).Replace("\\", "/");
		}
	}
}