using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TorControlLibrary.Exceptions
{
    public class TorException : System.Exception
    {
        public static TorException Parse(String errorLine)
        {
            TorException ex = null;
            switch (errorLine.Substring(0, 3))
            {
                case "552":
                    if (errorLine.Contains("Unknown stream"))
                        ex = new TorUnknownStreamException()
                        {
                            StreamID = Int32.Parse(errorLine.Substring(errorLine.IndexOf('"') + 1, errorLine.Length - (errorLine.LastIndexOf('"') + 1)))
                        };
                    else if (errorLine.Contains("Unknown circuit"))
                        ex = new TorUnknownCircuitException()
                        {
                            CircuitID = Int32.Parse(errorLine.Substring(errorLine.IndexOf('"') + 1, errorLine.Length - (errorLine.LastIndexOf('"') + 1)))
                        };
                    else
                        ex = new TorException();
                    break;
                case "551":
                    if (errorLine.Contains("one-hop circuit"))
                    {
                        ex = new TorOneCircuitException();
                    }
                    break;
                case "515":
                    ex = new TorAuthenticationException();
                    break;
                default:
                    throw new ApplicationException("Unhandled exception from TOR control port");
            }
            ex.ErrorDescription = errorLine.Substring(4);
            ex.StatusCode = Int32.Parse(errorLine.Substring(0, 3));
            return ex;
        }
        public Int32 StatusCode { get; set; }
        public String ErrorDescription { get; set; }
    }
}