using Cleanuparr.Domain.Entities.Arr;
using Cleanuparr.Domain.Entities.Arr.Queue;
using Cleanuparr.Domain.Enums;
using Cleanuparr.Infrastructure.Features.Arr;
using Cleanuparr.Infrastructure.Features.Arr.Interfaces;
using Cleanuparr.Infrastructure.Features.DownloadClient;
using Cleanuparr.Infrastructure.Features.DownloadRemover.Models;
using Cleanuparr.Infrastructure.Features.Jobs;
using Cleanuparr.Infrastructure.Features.MalwareBlocker;
using Cleanuparr.Infrastructure.Tests.Features.Jobs.TestHelpers;
using Cleanuparr.Infrastructure.Tests.TestHelpers;
using Cleanuparr.Persistence.Models.Configuration;
using Cleanuparr.Persistence.Models.Configuration.Arr;
using Cleanuparr.Persistence.Models.Configuration.MalwareBlocker;
using Microsoft.Extensions.Logging;
using NSubstitute;
using NSubstitute.ExceptionExtensions;
using Xunit;
using MalwareBlockerJob = Cleanuparr.Infrastructure.Features.Jobs.MalwareBlocker;

namespace Cleanuparr.Infrastructure.Tests.Features.Jobs;

[Collection(JobHandlerCollection.Name)]
public class MalwareBlockerTests : IDisposable
{
    private readonly JobHandlerFixture _fixture;
    private readonly ILogger<MalwareBlockerJob> _logger;

    public MalwareBlockerTests(JobHandlerFixture fixture)
    {
        _fixture = fixture;
        _fixture.RecreateDataContext();
        _fixture.ResetMocks();
        _logger = _fixture.CreateLogger<MalwareBlockerJob>();
    }

    public void Dispose()
    {
        GC.SuppressFinalize(this);
    }

    private MalwareBlockerJob CreateSut()
    {
        return new MalwareBlockerJob(
            _logger,
            _fixture.DataContext,
            _fixture.Cache,
            _fixture.MessageBus,
            _fixture.ArrClientFactory,
            _fixture.ArrQueueIterator,
            _fixture.DownloadServiceFactory,
            _fixture.BlocklistProvider,
            _fixture.EventPublisher,
            _fixture.JobManagementService
        );
    }

    #region ExecuteInternalAsync Tests

    [Fact]
    public async Task ExecuteInternalAsync_WhenNoDownloadClientsConfigured_LogsWarningAndReturns()
    {
        // Arrange
        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        _logger.ReceivedLogContaining(LogLevel.Warning, "No download clients configured");
    }

    [Fact]
    public async Task ExecuteInternalAsync_WhenNoBlocklistsEnabled_LogsWarningAndReturns()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        _logger.ReceivedLogContaining(LogLevel.Warning, "No blocklists are enabled");
    }

    [Fact]
    public async Task ExecuteInternalAsync_WhenBlocklistEnabled_LoadsBlocklists()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        _fixture.ArrClientFactory
            .GetClient(Arg.Any<InstanceType>(), Arg.Any<float>())
            .Returns(mockArrClient);

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(Task.CompletedTask);

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        await _fixture.BlocklistProvider.Received(1).LoadBlocklistsAsync();
    }

    [Fact]
    public async Task ExecuteInternalAsync_WhenSonarrEnabled_ProcessesSonarrInstances()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(Task.CompletedTask);

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        _fixture.ArrClientFactory.Received(1).GetClient(InstanceType.Sonarr, Arg.Any<float>());
    }

    [Theory]
    [InlineData(InstanceType.Radarr)]
    [InlineData(InstanceType.Lidarr)]
    [InlineData(InstanceType.Readarr)]
    [InlineData(InstanceType.Whisparr)]
    public async Task ExecuteInternalAsync_WhenArrTypeEnabled_ProcessesCorrectInstances(InstanceType instanceType)
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableBlocklist(instanceType);
        AddArrInstance(instanceType);

        var mockArrClient = Substitute.For<IArrClient>();
        _fixture.ArrClientFactory
            .GetClient(instanceType, Arg.Any<float>())
            .Returns(mockArrClient);

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(Task.CompletedTask);

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        _fixture.ArrClientFactory.Received(1).GetClient(instanceType, Arg.Any<float>());
    }

    #endregion

    #region ProcessInstanceAsync Tests

    [Fact]
    public async Task ProcessInstanceAsync_SkipsIgnoredDownloads()
    {
        // Arrange
        var generalConfig = _fixture.DataContext.GeneralConfigs.First();
        generalConfig.IgnoredDownloads = ["ignored-download-id"];
        _fixture.DataContext.SaveChanges();

        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var queueRecord = new QueueRecord
        {
            Id = 1,
            DownloadId = "ignored-download-id",
            Title = "Ignored Download",
            Protocol = "torrent",
            SeriesId = 1,
            EpisodeId = 1
        };

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([queueRecord]);
            });

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        _logger.ReceivedLogContaining(LogLevel.Information, "ignored");
    }

    [Fact]
    public async Task ProcessInstanceAsync_ChecksTorrentClientsForBlockedFiles()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var queueRecord = new QueueRecord
        {
            Id = 1,
            DownloadId = "torrent-download-id",
            Title = "Torrent Download",
            Protocol = "torrent",
            SeriesId = 1,
            EpisodeId = 1
        };

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([queueRecord]);
            });

        var mockDownloadService = _fixture.CreateMockDownloadService();
        mockDownloadService
            .BlockUnwantedFilesAsync(
                Arg.Any<string>(),
                Arg.Any<List<string>>()
            )
            .Returns(new BlockFilesResult { Found = true, MetadataFound = true, ShouldRemove = false });

        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        await mockDownloadService.Received(1)
            .BlockUnwantedFilesAsync("torrent-download-id", Arg.Any<List<string>>());
    }

    [Fact]
    public async Task ProcessInstanceAsync_WhenShouldRemove_PublishesRemoveRequest()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        var sonarrInstance = TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var queueRecord = new QueueRecord
        {
            Id = 1,
            DownloadId = "malware-download-id",
            Title = "Malware Download",
            Protocol = "torrent",
            SeriesId = 1,
            EpisodeId = 1
        };

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([queueRecord]);
            });

        var mockDownloadService = _fixture.CreateMockDownloadService();
        mockDownloadService
            .BlockUnwantedFilesAsync(
                Arg.Any<string>(),
                Arg.Any<List<string>>()
            )
            .Returns(new BlockFilesResult
            {
                Found = true,
                MetadataFound = true,
                ShouldRemove = true,
                IsPrivate = false,
                DeleteReason = DeleteReason.AllFilesBlocked
            });

        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        await _fixture.MessageBus.Received(1).Publish(
            Arg.Is<QueueItemRemoveRequest<SeriesSearchItem>>(r =>
                r.DeleteReason == DeleteReason.AllFilesBlocked
            ),
            Arg.Any<CancellationToken>()
        );
    }

    [Fact]
    public async Task ExecuteInternalAsync_WhenWebhookTarget_ScansOnlyMatchingDownload()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        var sonarrInstance = TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var matching = new QueueRecord { Id = 1, DownloadId = "match-hash", Title = "Match", Protocol = "torrent", SeriesId = 5, EpisodeId = 1 };
        var other = new QueueRecord { Id = 2, DownloadId = "other-hash", Title = "Other", Protocol = "torrent", SeriesId = 5, EpisodeId = 2 };

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>(),
                Arg.Any<long?>()
            )
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([matching, other]);
            });

        var mockDownloadService = _fixture.CreateMockDownloadService();
        mockDownloadService
            .BlockUnwantedFilesAsync(Arg.Any<string>(), Arg.Any<List<string>>())
            .Returns(new BlockFilesResult { Found = true, MetadataFound = true, ShouldRemove = false });

        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        Cleanuparr.Infrastructure.Features.Context.ContextProvider.Set(
            new Cleanuparr.Infrastructure.Features.Jobs.WebhookScanTarget(
                sonarrInstance.Id, "match-hash", 5, InstanceType.Sonarr));

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        await mockDownloadService.Received(1).BlockUnwantedFilesAsync("match-hash", Arg.Any<List<string>>());
        await mockDownloadService.DidNotReceive().BlockUnwantedFilesAsync("other-hash", Arg.Any<List<string>>());
        // Found in a client -> resolved, no retry scheduled
        await _fixture.JobManagementService.DidNotReceive()
            .ScheduleMalwareBlockerWebhookRetry(Arg.Any<WebhookScanTarget>());
    }

    [Fact]
    public async Task ExecuteInternalAsync_WhenWebhookTargetNotFoundInClient_SchedulesRetry()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        var sonarrInstance = TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var record = new QueueRecord { Id = 1, DownloadId = "pending-hash", Title = "Pending", Protocol = "torrent", SeriesId = 7, EpisodeId = 1 };

        _fixture.ArrQueueIterator
            .Iterate(Arg.Any<IArrClient>(), Arg.Any<ArrInstance>(), Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>(), Arg.Any<long?>())
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([record]);
            });

        // Torrent not (yet) present in any client
        var mockDownloadService = _fixture.CreateMockDownloadService();
        mockDownloadService
            .BlockUnwantedFilesAsync(Arg.Any<string>(), Arg.Any<List<string>>())
            .Returns(new BlockFilesResult { Found = false });

        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        Cleanuparr.Infrastructure.Features.Context.ContextProvider.Set(
            new Cleanuparr.Infrastructure.Features.Jobs.WebhookScanTarget(
                sonarrInstance.Id, "pending-hash", 7, InstanceType.Sonarr, RetryIndex: 1));

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        await _fixture.JobManagementService.Received(1).ScheduleMalwareBlockerWebhookRetry(
            Arg.Is<WebhookScanTarget>(t =>
                t.InstanceId == sonarrInstance.Id &&
                t.DownloadId == "pending-hash" &&
                t.ContentId == 7 &&
                t.Type == InstanceType.Sonarr &&
                t.RetryIndex == 1));
    }

    [Fact]
    public async Task ExecuteInternalAsync_WhenWebhookTargetMetadataMissing_SchedulesRetry()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        var sonarrInstance = TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var record = new QueueRecord { Id = 1, DownloadId = "metadl-hash", Title = "MetaDL", Protocol = "torrent", SeriesId = 7, EpisodeId = 1 };

        _fixture.ArrQueueIterator
            .Iterate(Arg.Any<IArrClient>(), Arg.Any<ArrInstance>(), Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>(), Arg.Any<long?>())
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([record]);
            });

        // Torrent found in the client, but its metadata/file list is not ready yet
        var mockDownloadService = _fixture.CreateMockDownloadService();
        mockDownloadService
            .BlockUnwantedFilesAsync(Arg.Any<string>(), Arg.Any<List<string>>())
            .Returns(new BlockFilesResult { Found = true });

        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        Cleanuparr.Infrastructure.Features.Context.ContextProvider.Set(
            new Cleanuparr.Infrastructure.Features.Jobs.WebhookScanTarget(
                sonarrInstance.Id, "metadl-hash", 7, InstanceType.Sonarr, RetryIndex: 0));

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        await _fixture.JobManagementService.Received(1).ScheduleMalwareBlockerWebhookRetry(
            Arg.Is<WebhookScanTarget>(t => t.DownloadId == "metadl-hash" && t.RetryIndex == 0));
    }

    [Fact]
    public async Task ExecuteInternalAsync_WhenWebhookTargetIsUsenet_DoesNotScanOrRetry()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        var sonarrInstance = TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var record = new QueueRecord { Id = 1, DownloadId = "usenet-id", Title = "Usenet", Protocol = "usenet", SeriesId = 9, EpisodeId = 1 };

        _fixture.ArrQueueIterator
            .Iterate(Arg.Any<IArrClient>(), Arg.Any<ArrInstance>(), Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>(), Arg.Any<long?>())
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([record]);
            });

        var mockDownloadService = _fixture.CreateMockDownloadService();
        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        Cleanuparr.Infrastructure.Features.Context.ContextProvider.Set(
            new Cleanuparr.Infrastructure.Features.Jobs.WebhookScanTarget(
                sonarrInstance.Id, "usenet-id", 9, InstanceType.Sonarr));

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert: usenet is acknowledged once seen in the queue -> no scan, no retry
        await mockDownloadService.DidNotReceive().BlockUnwantedFilesAsync(Arg.Any<string>(), Arg.Any<List<string>>());
        await _fixture.JobManagementService.DidNotReceive()
            .ScheduleMalwareBlockerWebhookRetry(Arg.Any<WebhookScanTarget>());
    }

    [Fact]
    public async Task ProcessInstanceAsync_WhenShouldRemoveWithAtLeastOneFileBlocked_PublishesRemoveRequest()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        IArrClient mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        QueueRecord queueRecord = new()
        {
            Id = 1,
            DownloadId = "any-file-blocked-download-id",
            Title = "Mixed Malware Download",
            Protocol = "torrent",
            SeriesId = 1,
            EpisodeId = 1
        };

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([queueRecord]);
            });

        IDownloadService mockDownloadService = _fixture.CreateMockDownloadService();
        mockDownloadService
            .BlockUnwantedFilesAsync(
                Arg.Any<string>(),
                Arg.Any<List<string>>()
            )
            .Returns(new BlockFilesResult
            {
                Found = true,
                MetadataFound = true,
                ShouldRemove = true,
                IsPrivate = false,
                DeleteReason = DeleteReason.AtLeastOneFileBlocked
            });

        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        MalwareBlockerJob sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        await _fixture.MessageBus.Received(1).Publish(
            Arg.Is<QueueItemRemoveRequest<SeriesSearchItem>>(r =>
                r.DeleteReason == DeleteReason.AtLeastOneFileBlocked
            ),
            Arg.Any<CancellationToken>()
        );
    }

    [Fact]
    public async Task ProcessInstanceAsync_WhenPrivateAndDeletePrivateFalse_DoesNotRemoveFromClient()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        // Ensure DeletePrivate is false
        var contentBlockerConfig = _fixture.DataContext.ContentBlockerConfigs.First();
        contentBlockerConfig.DeletePrivate = false;
        _fixture.DataContext.SaveChanges();

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var queueRecord = new QueueRecord
        {
            Id = 1,
            DownloadId = "private-malware-id",
            Title = "Private Malware",
            Protocol = "torrent",
            SeriesId = 1,
            EpisodeId = 1
        };

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([queueRecord]);
            });

        var mockDownloadService = _fixture.CreateMockDownloadService();
        mockDownloadService
            .BlockUnwantedFilesAsync(
                Arg.Any<string>(),
                Arg.Any<List<string>>()
            )
            .Returns(new BlockFilesResult
            {
                Found = true,
                MetadataFound = true,
                ShouldRemove = true,
                IsPrivate = true,
                DeleteReason = DeleteReason.AllFilesBlocked
            });

        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert - RemoveFromClient should be false
        await _fixture.MessageBus.Received(1).Publish(
            Arg.Is<QueueItemRemoveRequest<SeriesSearchItem>>(r =>
                r.RemoveFromClient == false
            ),
            Arg.Any<CancellationToken>()
        );
    }

    [Fact]
    public async Task ProcessInstanceAsync_WhenDownloadNotFoundInTorrentClient_LogsWarning()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var queueRecord = new QueueRecord
        {
            Id = 1,
            DownloadId = "missing-download-id",
            Title = "Missing Download",
            Protocol = "torrent",
            SeriesId = 1,
            EpisodeId = 1
        };

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([queueRecord]);
            });

        var mockDownloadService = _fixture.CreateMockDownloadService();
        mockDownloadService
            .BlockUnwantedFilesAsync(
                Arg.Any<string>(),
                Arg.Any<List<string>>()
            )
            .Returns(new BlockFilesResult { Found = false });

        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        _logger.ReceivedLogContaining(LogLevel.Warning, "Download not found in any torrent client");
    }

    [Fact]
    public async Task ProcessInstanceAsync_SkipsItem_WhenMissingContentId_AndProcessNoContentIdIsFalse()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(false);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var queueRecord = new QueueRecord
        {
            Id = 1,
            DownloadId = "no-content-id-download",
            Title = "No Content ID Download",
            Protocol = "torrent"
        };

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([queueRecord]);
            });

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        _logger.ReceivedLogContaining(LogLevel.Information, "skip | item is missing the content id");

        await _fixture.MessageBus.DidNotReceive().Publish(
            Arg.Any<QueueItemRemoveRequest<SeriesSearchItem>>(),
            Arg.Any<CancellationToken>()
        );
    }

    [Fact]
    public async Task ProcessInstanceAsync_WhenMissingContentId_AndProcessNoContentIdIsTrue_PublishesRemoveRequestWithSkipSearch()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var contentBlockerConfig = _fixture.DataContext.ContentBlockerConfigs.First();
        contentBlockerConfig.ProcessNoContentId = true;
        _fixture.DataContext.SaveChanges();

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(false);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var queueRecord = new QueueRecord
        {
            Id = 1,
            DownloadId = "no-content-id-download",
            Title = "No Content ID Download",
            Protocol = "torrent"
        };

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([queueRecord]);
            });

        var mockDownloadService = _fixture.CreateMockDownloadService();
        mockDownloadService
            .BlockUnwantedFilesAsync(
                Arg.Any<string>(),
                Arg.Any<List<string>>()
            )
            .Returns(new BlockFilesResult
            {
                Found = true,
                MetadataFound = true,
                ShouldRemove = true,
                IsPrivate = false,
                DeleteReason = DeleteReason.AllFilesBlocked
            });

        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert - SkipSearch must be true because the item has no content ID
        await _fixture.MessageBus.Received(1).Publish(
            Arg.Is<QueueItemRemoveRequest<SeriesSearchItem>>(r =>
                r.SkipSearch == true &&
                r.DeleteReason == DeleteReason.AllFilesBlocked
            ),
            Arg.Any<CancellationToken>()
        );
    }

    #endregion

    #region Error Handling Tests

    [Fact]
    public async Task ProcessInstanceAsync_WhenDownloadServiceThrows_LogsErrorAndContinues()
    {
        // Arrange
        TestDataContextFactory.AddDownloadClient(_fixture.DataContext);
        EnableSonarrBlocklist();
        TestDataContextFactory.AddSonarrInstance(_fixture.DataContext);

        var mockArrClient = Substitute.For<IArrClient>();
        mockArrClient.IsRecordValid(Arg.Any<QueueRecord>()).Returns(true);
        mockArrClient.HasContentId(Arg.Any<QueueRecord>()).Returns(true);

        _fixture.ArrClientFactory
            .GetClient(InstanceType.Sonarr, Arg.Any<float>())
            .Returns(mockArrClient);

        var queueRecord = new QueueRecord
        {
            Id = 1,
            DownloadId = "error-download-id",
            Title = "Error Download",
            Protocol = "torrent",
            SeriesId = 1,
            EpisodeId = 1
        };

        _fixture.ArrQueueIterator
            .Iterate(
                Arg.Any<IArrClient>(),
                Arg.Any<ArrInstance>(),
                Arg.Any<Func<IReadOnlyList<QueueRecord>, Task>>()
            )
            .Returns(ci =>
            {
                var callback = ci.ArgAt<Func<IReadOnlyList<QueueRecord>, Task>>(2);
                return callback([queueRecord]);
            });

        var mockDownloadService = _fixture.CreateMockDownloadService();
        mockDownloadService
            .BlockUnwantedFilesAsync(
                Arg.Any<string>(),
                Arg.Any<List<string>>()
            )
            .ThrowsAsync(new Exception("Connection failed"));

        _fixture.DownloadServiceFactory
            .GetDownloadService(Arg.Any<DownloadClientConfig>())
            .Returns(mockDownloadService);

        var sut = CreateSut();

        // Act
        await sut.ExecuteAsync();

        // Assert
        _logger.ReceivedLogContaining(LogLevel.Error, "Error checking download");
    }

    #endregion

    #region Helper Methods

    private void EnableSonarrBlocklist()
    {
        var contentBlockerConfig = _fixture.DataContext.ContentBlockerConfigs.First();
        contentBlockerConfig.Sonarr = new BlocklistSettings { Enabled = true };
        _fixture.DataContext.SaveChanges();
    }

    private void EnableBlocklist(InstanceType instanceType)
    {
        var config = _fixture.DataContext.ContentBlockerConfigs.First();
        var settings = new BlocklistSettings { Enabled = true };
        switch (instanceType)
        {
            case InstanceType.Radarr:   config.Radarr   = settings; break;
            case InstanceType.Lidarr:   config.Lidarr   = settings; break;
            case InstanceType.Readarr:  config.Readarr  = settings; break;
            case InstanceType.Whisparr: config.Whisparr = settings; break;
            default: throw new ArgumentOutOfRangeException(nameof(instanceType));
        }
        _fixture.DataContext.SaveChanges();
    }

    private void AddArrInstance(InstanceType instanceType)
    {
        switch (instanceType)
        {
            case InstanceType.Radarr:   TestDataContextFactory.AddRadarrInstance(_fixture.DataContext);   break;
            case InstanceType.Lidarr:   TestDataContextFactory.AddLidarrInstance(_fixture.DataContext);   break;
            case InstanceType.Readarr:  TestDataContextFactory.AddReadarrInstance(_fixture.DataContext);  break;
            case InstanceType.Whisparr: TestDataContextFactory.AddWhisparrInstance(_fixture.DataContext); break;
            default: throw new ArgumentOutOfRangeException(nameof(instanceType));
        }
    }

    #endregion
}