using System.Collections.Generic;
using System.Configuration;
using AltNetHispano.Agendas.Domain;
using Twitterizer;

namespace AltNetHispano.Agendas.Twitter
{
	public class TwitterPublicador : IPublicador
	{
		public const int LIMITE_MENSAJE = 140;

		private string ConsumerKey
		{
			get { return ConfigurationManager.AppSettings["consumerKeyAppTwitt"]; }
		}

		private string ConsumerSecret
		{
			get { return ConfigurationManager.AppSettings["consumerSecretAppTwitt"]; }
		}


		private string AccessToken
		{
			get { return ConfigurationManager.AppSettings["accessTokenAppTwitt"]; }
		}


		private string AccessTokenSecret
		{
			get { return ConfigurationManager.AppSettings["accessTokenSecretAppTwitt"]; }
		}

		public void Publicar(IEnumerable<Track> tracks)
		{
			foreach (var track in tracks)
			{
				string message;
				var twitt = BuildTwitt(track);
				if (!string.IsNullOrWhiteSpace(twitt))
					Publicar(twitt, out message);
			}
		}

		private static string BuildTwitt(Track track)
		{
			string body = string.Empty;
			switch (track.Accion)
			{
				case Accion.Proponer:
					body = "Se ha propuesto un/a nuevo/a " + track.Evento.Tipo;
					break;
				case Accion.Agendar:
					body = "Se ha agendando el evento" + track.Evento.Titulo;
					if (track.Evento.Ponente.Twitter != null)
						body += " con @" + track.Evento.Ponente.Twitter;
					break;
				case Accion.Confirmar:
					if (track.Evento.Fecha.HasValue)
						body = "Se confirma para el " + track.Evento.Fecha.Value.ToShortDateString() + " el evento " + track.Evento.Titulo;
					break;
			}

			return body.Length > LIMITE_MENSAJE ? body.Substring(0, LIMITE_MENSAJE - 1) : body;
		}

		public bool Publicar(string status, out string message)
		{
			var tokens = new OAuthTokens
							{
								ConsumerKey = ConsumerKey,
								ConsumerSecret = ConsumerSecret,
								AccessToken = AccessToken,
								AccessTokenSecret = AccessTokenSecret
							};

			var response = TwitterStatus.Update(tokens, status);

			message = response.ErrorMessage;
			return response.Result == RequestResult.Success;
		}
	}
}