using AltNetHispano.Agendas.Domain.Exceptions;

namespace AltNetHispano.Agendas.Domain
{
    public class EventoCanceladoState : EventoState
    {
        private EventoCanceladoState()
        {
        }

        private static readonly EventoState _instance = new EventoCanceladoState();

        public static EventoState GetInstance()
        {
            return _instance;
        }

        private const string Descripcion = "Cancelado";

        public override void Promover(Evento evento, Accion accion)
        {
            switch (accion)
            {
                case Accion.Descartar:
                    evento.SetEstado(EventoDescartadoState.GetInstance());
                    evento.AddTrack(new Track(evento, Accion.Descartar));
                    break;
                case Accion.ReAgendar:
                    evento.SetEstado(EventoAgendadoState.GetInstance());
                    evento.AddTrack(new Track(evento, Accion.ReAgendar));
                    break;
                case Accion.ReProponer:
                    evento.SetEstado(EventoPropuestoState.GetInstance());
                    evento.AddTrack(new Track(evento, Accion.ReProponer));
                    break;
                default:
                    throw new AccionNoSoportadaException(this.GetType(), accion);
            }
        }

        public override string GetDescripcion()
        {
            return Descripcion;
        }

        public override bool PuedePromover(Accion accion)
        {
            return accion == Accion.Descartar || accion == Accion.ReAgendar || accion == Accion.ReProponer;
        }
    }
}