using System;
using System.Collections.Generic;
using System.Linq;
using FizzWare.NBuilder;
using FluentAssertions;
using Moq;
using NUnit.Framework;
using NzbDrone.Core.MetadataSource;
using NzbDrone.Core.Tv;
using NzbDrone.Core.Test.Framework;
using NzbDrone.Test.Common;

namespace NzbDrone.Core.Test.TvTests
{
    [TestFixture]
    public class RefreshEpisodeServiceFixture : CoreTest<RefreshEpisodeService>
    {
        private List<Episode> _insertedEpisodes;
        private List<Episode> _updatedEpisodes;
        private List<Episode> _deletedEpisodes;
        private Tuple<Series, List<Episode>> _gameOfThrones;

        [TestFixtureSetUp]
        public void TestFixture()
        {
            _gameOfThrones = Mocker.Resolve<TraktProxy>().GetSeriesInfo(121361);//Game of thrones

            // Remove specials.
            _gameOfThrones.Item2.RemoveAll(v => v.SeasonNumber == 0);
        }

        private List<Episode> GetEpisodes()
        {
            return _gameOfThrones.Item2.JsonClone();
        }

        private Series GetSeries()
        {
            var series = _gameOfThrones.Item1.JsonClone();
            series.Seasons = new List<Season>();

            return series;
        }

        [SetUp]
        public void Setup()
        {
            _insertedEpisodes = new List<Episode>();
            _updatedEpisodes = new List<Episode>();
            _deletedEpisodes = new List<Episode>();

            Mocker.GetMock<IEpisodeService>().Setup(c => c.InsertMany(It.IsAny<List<Episode>>()))
                .Callback<List<Episode>>(e => _insertedEpisodes = e);


            Mocker.GetMock<IEpisodeService>().Setup(c => c.UpdateMany(It.IsAny<List<Episode>>()))
                .Callback<List<Episode>>(e => _updatedEpisodes = e);


            Mocker.GetMock<IEpisodeService>().Setup(c => c.DeleteMany(It.IsAny<List<Episode>>()))
                .Callback<List<Episode>>(e => _deletedEpisodes = e);
        }

        [Test]
        public void should_create_all_when_no_existing_episodes()
        {

            Mocker.GetMock<IEpisodeService>().Setup(c => c.GetEpisodeBySeries(It.IsAny<int>()))
                .Returns(new List<Episode>());

            Subject.RefreshEpisodeInfo(GetSeries(), GetEpisodes());

            _insertedEpisodes.Should().HaveSameCount(GetEpisodes());
            _updatedEpisodes.Should().BeEmpty();
            _deletedEpisodes.Should().BeEmpty();
        }

        [Test]
        public void should_update_all_when_all_existing_episodes()
        {
            Mocker.GetMock<IEpisodeService>().Setup(c => c.GetEpisodeBySeries(It.IsAny<int>()))
                .Returns(GetEpisodes());

            Subject.RefreshEpisodeInfo(GetSeries(), GetEpisodes());

            _insertedEpisodes.Should().BeEmpty();
            _updatedEpisodes.Should().HaveSameCount(GetEpisodes());
            _deletedEpisodes.Should().BeEmpty();
        }

        [Test]
        public void should_delete_all_when_all_existing_episodes_are_gone_from_trakt()
        {
            Mocker.GetMock<IEpisodeService>().Setup(c => c.GetEpisodeBySeries(It.IsAny<int>()))
                .Returns(GetEpisodes());

            Subject.RefreshEpisodeInfo(GetSeries(), new List<Episode>());

            _insertedEpisodes.Should().BeEmpty();
            _updatedEpisodes.Should().BeEmpty();
            _deletedEpisodes.Should().HaveSameCount(GetEpisodes());
        }

        [Test]
        public void should_delete_duplicated_episodes_based_on_season_episode_number()
        {
            var duplicateEpisodes = GetEpisodes().Skip(5).Take(2).ToList();

            Mocker.GetMock<IEpisodeService>().Setup(c => c.GetEpisodeBySeries(It.IsAny<int>()))
                .Returns(GetEpisodes().Union(duplicateEpisodes).ToList());

            Subject.RefreshEpisodeInfo(GetSeries(), GetEpisodes());

            _insertedEpisodes.Should().BeEmpty();
            _updatedEpisodes.Should().HaveSameCount(GetEpisodes());
            _deletedEpisodes.Should().HaveSameCount(duplicateEpisodes);
        }

        [Test]
        public void should_not_change_monitored_status_for_existing_episodes()
        {
            var series = GetSeries();
            series.Seasons = new List<Season>();
            series.Seasons.Add(new Season { SeasonNumber = 1, Monitored = false });

            var episodes = GetEpisodes();

            episodes.ForEach(e => e.Monitored = true);

            Mocker.GetMock<IEpisodeService>().Setup(c => c.GetEpisodeBySeries(It.IsAny<int>()))
                .Returns(episodes);

            Subject.RefreshEpisodeInfo(series, GetEpisodes());

            _updatedEpisodes.Should().HaveSameCount(GetEpisodes());
            _updatedEpisodes.Should().OnlyContain(e => e.Monitored == true);
        }

        [Test]
        public void should_remove_duplicate_remote_episodes_before_processing()
        {
            Mocker.GetMock<IEpisodeService>().Setup(c => c.GetEpisodeBySeries(It.IsAny<int>()))
                .Returns(new List<Episode>());

            var episodes = Builder<Episode>.CreateListOfSize(5)
                                           .TheFirst(2)
                                           .With(e => e.SeasonNumber = 1)
                                           .With(e => e.EpisodeNumber = 1)
                                           .Build()
                                           .ToList();

            Subject.RefreshEpisodeInfo(GetSeries(), episodes);

            _insertedEpisodes.Should().HaveCount(episodes.Count - 1);
            _updatedEpisodes.Should().BeEmpty();
            _deletedEpisodes.Should().BeEmpty();
        }

        [Test]
        public void should_set_absolute_episode_number()
        {
            Mocker.GetMock<IEpisodeService>().Setup(c => c.GetEpisodeBySeries(It.IsAny<int>()))
                .Returns(new List<Episode>());

            Subject.RefreshEpisodeInfo(GetSeries(), GetEpisodes());

            var season1 = _insertedEpisodes.Where(e => e.SeasonNumber == 1 && e.EpisodeNumber > 0);
            var season2episode1 = _insertedEpisodes.Single(e => e.SeasonNumber == 2 && e.EpisodeNumber == 1);

            season2episode1.AbsoluteEpisodeNumber.Should().Be(season1.Count() + 1);

            _insertedEpisodes.Where(e => e.SeasonNumber > 0 && e.EpisodeNumber > 0).All(e => e.AbsoluteEpisodeNumber > 0).Should().BeTrue();
            _updatedEpisodes.Should().BeEmpty();
            _deletedEpisodes.Should().BeEmpty();
        }
    }
}