using System;
using System.IO;
using System.Text.RegularExpressions;

namespace FluentFTP {
	/// <summary>
	/// Represents a reply to an event on the server
	/// </summary>
	public struct FtpReply {
		/// <summary>
		/// The type of response received from the last command executed
		/// </summary>
		public FtpResponseType Type {
			get {
				int code;

				if (Code != null && Code.Length > 0 &&
					int.TryParse(Code[0].ToString(), out code)) {
					return (FtpResponseType)code;
				}

				return FtpResponseType.None;
			}
		}

		string m_respCode;
		/// <summary>
		/// The status code of the response
		/// </summary>
		public string Code {
			get {
				return m_respCode;
			}
			set {
				m_respCode = value;
			}
		}

		string m_respMessage;
		/// <summary>
		/// The message, if any, that the server sent with the response
		/// </summary>
		public string Message {
			get {
				return m_respMessage;
			}
			set {
				m_respMessage = value;
			}
		}

		string m_infoMessages;
		/// <summary>
		/// Informational messages sent from the server
		/// </summary>
		public string InfoMessages {
			get {
				return m_infoMessages;
			}
			set {
				m_infoMessages = value;
			}
		}

		/// <summary>
		/// General success or failure of the last command executed
		/// </summary>
		public bool Success {
			get {
				if (Code != null && Code.Length > 0) {
					int i;

					// 1xx, 2xx, 3xx indicate success
					// 4xx, 5xx are failures
					if (int.TryParse(Code[0].ToString(), out i) && i >= 1 && i <= 3) {
						return true;
					}
				}

				return false;
			}
		}

		/// <summary>
		/// Gets the error message including any informational output
		/// that was sent by the server. Sometimes the final response
		/// line doesn't contain anything informative as to what was going
		/// on with the server. Instead it may send information messages so
		/// in an effort to give as meaningful as a response as possible
		/// the informational messages will be included in the error.
		/// </summary>
		public string ErrorMessage {
			get {
				string message = "";

				if (Success) {
					return message;
				}

				if (InfoMessages != null && InfoMessages.Length > 0) {
					foreach (string s in InfoMessages.Split('\n')) {
						string m = Regex.Replace(s, "^[0-9]{3}-", "");
						message += string.Format("{0}; ", m.Trim());
					}
				}

				message += Message;

				return message;
			}
		}
	}
}