using System.IO;
using FizzWare.NBuilder;
using Moq;
using NUnit.Framework;
using NzbDrone.Common.Disk;
using NzbDrone.Core.MediaFiles;
using NzbDrone.Core.MediaFiles.Events;
using NzbDrone.Core.MediaFiles.MediaInfo;
using NzbDrone.Core.Test.Framework;
using NzbDrone.Core.Music;
using NzbDrone.Test.Common;
using NzbDrone.Core.Configuration;

namespace NzbDrone.Core.Test.MediaFiles.MediaInfo
{
    [TestFixture]
    public class UpdateMediaInfoServiceFixture : CoreTest<UpdateMediaInfoService>
    {
        private Artist _artist;

        [SetUp]
        public void Setup()
        {
            _artist = new Artist
            {
                Id = 1,
                Path = @"C:\artist".AsOsAgnostic()
            };

            Mocker.GetMock<IConfigService>()
                  .SetupGet(s => s.EnableMediaInfo)
                  .Returns(true);
        }

        private void GivenFileExists()
        {
            Mocker.GetMock<IDiskProvider>()
                  .Setup(v => v.FileExists(It.IsAny<string>()))
                  .Returns(true);
        }

        private void GivenSuccessfulScan()
        {
            Mocker.GetMock<IVideoFileInfoReader>()
                  .Setup(v => v.GetMediaInfo(It.IsAny<string>()))
                  .Returns(new MediaInfoModel());
        }

        private void GivenFailedScan(string path)
        {
            Mocker.GetMock<IVideoFileInfoReader>()
                  .Setup(v => v.GetMediaInfo(path))
                  .Returns((MediaInfoModel)null);
        }

        [Test]
        public void should_skip_up_to_date_media_info()
        {
            var trackFiles = Builder<TrackFile>.CreateListOfSize(3)
                .All()
                .With(v => v.RelativePath = "media.flac")
                .TheFirst(1)
                .With(v => v.MediaInfo = new MediaInfoModel { SchemaRevision = VideoFileInfoReader.CURRENT_MEDIA_INFO_SCHEMA_REVISION })
                .BuildList();

            Mocker.GetMock<IMediaFileService>()
                  .Setup(v => v.GetFilesByArtist(1))
                  .Returns(trackFiles);

            GivenFileExists();
            GivenSuccessfulScan();

            Subject.Handle(new ArtistScannedEvent(_artist));

            Mocker.GetMock<IVideoFileInfoReader>()
                  .Verify(v => v.GetMediaInfo(Path.Combine(_artist.Path, "media.flac")), Times.Exactly(2));

            Mocker.GetMock<IMediaFileService>()
                  .Verify(v => v.Update(It.IsAny<TrackFile>()), Times.Exactly(2));
        }

        [Test]
        public void should_skip_not_yet_date_media_info()
        {
            var trackFiles = Builder<TrackFile>.CreateListOfSize(3)
                .All()
                .With(v => v.RelativePath = "media.flac")
                .TheFirst(1)
                .With(v => v.MediaInfo = new MediaInfoModel { SchemaRevision = VideoFileInfoReader.MINIMUM_MEDIA_INFO_SCHEMA_REVISION })
                .BuildList();

            Mocker.GetMock<IMediaFileService>()
                  .Setup(v => v.GetFilesByArtist(1))
                  .Returns(trackFiles);

            GivenFileExists();
            GivenSuccessfulScan();

            Subject.Handle(new ArtistScannedEvent(_artist));

            Mocker.GetMock<IVideoFileInfoReader>()
                  .Verify(v => v.GetMediaInfo(Path.Combine(_artist.Path, "media.flac")), Times.Exactly(2));

            Mocker.GetMock<IMediaFileService>()
                  .Verify(v => v.Update(It.IsAny<TrackFile>()), Times.Exactly(2));
        }

        [Test]
        public void should_update_outdated_media_info()
        {
            var trackFiles = Builder<TrackFile>.CreateListOfSize(3)
                .All()
                .With(v => v.RelativePath = "media.flac")
                .TheFirst(1)
                .With(v => v.MediaInfo = new MediaInfoModel())
                .BuildList();

            Mocker.GetMock<IMediaFileService>()
                  .Setup(v => v.GetFilesByArtist(1))
                  .Returns(trackFiles);

            GivenFileExists();
            GivenSuccessfulScan();

            Subject.Handle(new ArtistScannedEvent(_artist));

            Mocker.GetMock<IVideoFileInfoReader>()
                  .Verify(v => v.GetMediaInfo(Path.Combine(_artist.Path, "media.flac")), Times.Exactly(3));

            Mocker.GetMock<IMediaFileService>()
                  .Verify(v => v.Update(It.IsAny<TrackFile>()), Times.Exactly(3));
        }

        [Test]
        public void should_ignore_missing_files()
        {
            var trackFiles = Builder<TrackFile>.CreateListOfSize(2)
                   .All()
                   .With(v => v.RelativePath = "media.flac")
                   .BuildList();

            Mocker.GetMock<IMediaFileService>()
                  .Setup(v => v.GetFilesByArtist(1))
                  .Returns(trackFiles);

            GivenSuccessfulScan();

            Subject.Handle(new ArtistScannedEvent(_artist));

            Mocker.GetMock<IVideoFileInfoReader>()
                  .Verify(v => v.GetMediaInfo("media.flac"), Times.Never());

            Mocker.GetMock<IMediaFileService>()
                  .Verify(v => v.Update(It.IsAny<TrackFile>()), Times.Never());
        }

        [Test]
        public void should_continue_after_failure()
        {
            var episodeFiles = Builder<TrackFile>.CreateListOfSize(2)
                   .All()
                   .With(v => v.RelativePath = "media.flac")
                   .TheFirst(1)
                   .With(v => v.RelativePath = "media2.flac")
                   .BuildList();

            Mocker.GetMock<IMediaFileService>()
                  .Setup(v => v.GetFilesByArtist(1))
                  .Returns(episodeFiles);

            GivenFileExists();
            GivenSuccessfulScan();
            GivenFailedScan(Path.Combine(_artist.Path, "media2.flac"));

            Subject.Handle(new ArtistScannedEvent(_artist));

            Mocker.GetMock<IVideoFileInfoReader>()
                  .Verify(v => v.GetMediaInfo(Path.Combine(_artist.Path, "media.flac")), Times.Exactly(1));

            Mocker.GetMock<IMediaFileService>()
                  .Verify(v => v.Update(It.IsAny<TrackFile>()), Times.Exactly(1));
        }
    }
}