using System;
using System.Concurrency;
using System.Linq;
using MahTweets.Mango.Core.Models;
using MahTweets.Mango.Core.UpdateTypes;

namespace MahTweets.Mango.Core
{
    public class AcceptAllSubscriber : IStatusSubscriber
    {
        private readonly IScheduler _scheduler;

        public AcceptAllSubscriber()
            : this(Scheduler.ThreadPool)
        {
        }

        public AcceptAllSubscriber(IScheduler scheduler)
        {
            _scheduler = scheduler;
        }

        public IDisposable Subscribe(IObservable<StatusUpdate> source, IObserver<StatusUpdate> target)
        {
            return source
                .ObserveOn(_scheduler)
                .Where(s =>
                           {
                               var x = s.Types.Where(t => t is NotInEverything);
                               return !x.Any();
                           })
                .Subscribe(target);
        }

        public string SubscriberName
        {
            get { return SubscriberNames.All; }
        }
    }
}