namespace Nonemm.Recorder.Tests;

public class RecorderConfigStoreTests : IDisposable
{
    private readonly string folder = Path.Combine(Path.GetTempPath(), $"recorder-{Guid.NewGuid():N}");

    public void Dispose()
    {
        if (Directory.Exists(folder))
        {
            Directory.Delete(folder, true);
        }
    }

    [Fact]
    public void A_missing_file_gives_32_kbps_and_no_channels()
    {
        RecorderConfig config = new RecorderConfigStore(Path.Combine(folder, "none.json")).Load();

        Assert.Equal(32, config.BitrateKbps);
        Assert.Empty(config.Channels);
    }

    [Fact]
    public void Channels_that_were_saved_come_back_in_order()
    {
        RecorderConfigStore store = new(Path.Combine(folder, "config.json"));
        store.Save(new RecorderConfig
        {
            BitrateKbps = 48,
            Channels = [new("Line In", false, 1, 2), new("Speakers", true, 0, 2)],
        });

        RecorderConfig loaded = store.Load();

        Assert.Equal(48, loaded.BitrateKbps);
        Assert.Equal(["Line In R", "Speakers (output) L"], loaded.Channels.Select(channel => channel.Label));
    }

    [Fact]
    public void A_file_that_is_not_json_throws_with_its_path()
    {
        Directory.CreateDirectory(folder);
        string path = Path.Combine(folder, "config.json");
        File.WriteAllText(path, "not json");

        InvalidDataException error = Assert.Throws<InvalidDataException>(() => new RecorderConfigStore(path).Load());

        Assert.Contains(path, error.Message);
    }
}