using Explorer.Application;
using Explorer.Contracts;
using Explorer.Domain;

namespace Explorer.Application.Tests;

public class WorkbenchHostTests
{
    [Fact]
    public void Forwards_indexing_and_transfer_sessions()
    {
        var indexing = new FakeIndexing();
        var transfers = new FakeTransfers();
        var sources = new StubSources();
        var mutations = new StubMutations();
        IWorkbenchHost host = new WorkbenchHost(indexing, transfers, sources, mutations);
        Assert.Same(indexing, host.Indexing);
        Assert.Same(transfers, host.Transfers);
        Assert.Same(sources, host.Sources);
        Assert.Same(mutations, host.Mutations);

        host.Indexing.EnqueueFullScan(7);
        host.Transfers.PauseAll();
        Assert.Equal(7, indexing.FullScanId);
        Assert.True(transfers.PausedAll);
    }

    private sealed class FakeIndexing : IIndexingHost
    {
        public long FullScanId { get; private set; }
        public event EventHandler<ScanProgress>? ProgressChanged;

        public void EnqueueFullScan(long sourceId) => FullScanId = sourceId;
        public void EnqueueFolderScan(long sourceId, string pathRel) { }
        public void EnqueueReconcile(long sourceId, string pathRel) { }
        public void Cancel(long sourceId) { }

        public void Raise() => ProgressChanged?.Invoke(this, new ScanProgress
        {
            SourceId = 1,
            CurrentPath = "",
            Status = ScanJobStatus.Running
        });
    }

    private sealed class FakeTransfers : ITransferHost
    {
        public bool PausedAll { get; private set; }
        public event EventHandler? Changed = delegate { };
        public event EventHandler<TransferJob>? JobFinished = delegate { };
        public bool IsPaused => PausedAll;
        public IReadOnlyList<TransferJob> Snapshot() => [];
        public void PauseAll() => PausedAll = true;
        public void ResumeAll() => PausedAll = false;
        public void Pause(long jobId) { }
        public void Resume(long jobId) { }
        public void Retry(long jobId) { }
        public void Cancel(long jobId) { }
        public void Dismiss(long jobId) { }
        public void ClearFinished() { }
        public bool MoveUp(long jobId) => false;
        public bool MoveDown(long jobId) => false;
    }

    private sealed class StubSources : ISourceHost
    {
        public Task RefreshAsync(CancellationToken cancellationToken = default) => Task.CompletedTask;
        public Task<Source> AddUncAsync(string path, CancellationToken cancellationToken = default)
            => Task.FromResult(new Source { StableKey = "x", DisplayName = path });
        public Task<Source?> EnsureForPathAsync(string path, CancellationToken cancellationToken = default)
            => Task.FromResult<Source?>(null);
        public Task<bool> ForgetAsync(string path, CancellationToken cancellationToken = default)
            => Task.FromResult(false);
    }

    private sealed class StubMutations : IIndexMutations
    {
        public Task<long> UpsertSyncProfileAsync(SyncProfile profile, CancellationToken cancellationToken = default)
            => Task.FromResult(0L);
        public Task DeleteSyncProfileAsync(long id, CancellationToken cancellationToken = default) => Task.CompletedTask;
        public Task<long> UpsertOperationProfileAsync(OperationProfile profile, CancellationToken cancellationToken = default)
            => Task.FromResult(0L);
        public Task DeleteOperationProfileAsync(long id, CancellationToken cancellationToken = default) => Task.CompletedTask;
        public Task<long> CreateRenameBatchAsync(IReadOnlyList<RenameBatchItem> items, CancellationToken cancellationToken = default)
            => Task.FromResult(0L);
        public Task MarkRenameBatchUndoneAsync(long id, CancellationToken cancellationToken = default) => Task.CompletedTask;
        public Task EnqueueHashCollisionsAsync(long? sourceId, CancellationToken cancellationToken = default) => Task.CompletedTask;
        public Task UpsertRelationAsync(FileRelation relation, CancellationToken cancellationToken = default) => Task.CompletedTask;
    }
}