using System.Text;

namespace Nonemm.Rig.Tests;

public class OtrspBoxTests
{
    private static string Written(MemoryStream stream) =>
        Encoding.ASCII.GetString(stream.ToArray());

    [Fact]
    public async Task PointingTheTransmitterNamesTheRadio()
    {
        MemoryStream sent = new();
        using OtrspBox box = new(sent);

        await box.SetTransmitAsync(2);

        Assert.Equal("TX2\r", Written(sent));
    }

    [Fact]
    public async Task ListeningToBothRadiosAddsTheStereoFlag()
    {
        MemoryStream sent = new();
        using OtrspBox box = new(sent);

        await box.SetReceiveAsync(1, bothRadios: true);

        Assert.Equal("RX1S\r", Written(sent));
    }

    /// A box works relays. Saying the same thing again would rattle them for
    /// nothing, so it is not said.
    [Fact]
    public async Task TheSameCommandIsNotSentTwice()
    {
        MemoryStream sent = new();
        using OtrspBox box = new(sent);

        await box.SetTransmitAsync(1);
        await box.SetTransmitAsync(1);
        await box.SetTransmitAsync(2);

        Assert.Equal("TX1\rTX2\r", Written(sent));
    }

    [Fact]
    public async Task TransmitAndReceiveAreTrackedApart()
    {
        MemoryStream sent = new();
        using OtrspBox box = new(sent);

        await box.SetTransmitAsync(1);
        await box.SetReceiveAsync(1);

        Assert.Equal("TX1\rRX1\r", Written(sent));
    }

    [Fact]
    public async Task AnAuxiliaryCodeIsSentAsTwoDigits()
    {
        MemoryStream sent = new();
        using OtrspBox box = new(sent);

        await box.SetAuxiliaryAsync(2, 3);

        Assert.Equal("AUX203\r", Written(sent));
    }
}