using Xunit;
using ytLive.Helpers;
using ytLive.Services.Audio;
using ytLive.ViewModels;

namespace ytLive.Tests;

/// <summary>The TRAX bay shows the track, plays/pauses it, and carries a level — but no meter:
/// nothing measures the bed, and a decorative ladder would be a lie. Its fader moves a gain the
/// player actually applies, separate from the desktop-mute follow.
/// </summary>
public class TraxBayTests
{
    [Fact]
    public void The_trax_bay_binds_the_track_level_and_play_state_without_inventing_a_meter()
    {
        var dock = SourceAssert.Text("Controls", "AudioDock.xaml");
        Assert.Contains("Text=\"{Binding TraxTrackLabel}\"", dock);
        // KISS (creator 2026-10-30): background music is one number and two ±5 dB buttons, not a
        // channel strip — and it has no ladder of its own, because the desktop bed already carries it.
        Assert.Contains("Click=\"TraxStepDown_Click\"", dock);
        Assert.Contains("Click=\"TraxStepUp_Click\"", dock);
        Assert.Contains("IsEnabled=\"{Binding CanLowerTrax}\"", dock);
        Assert.Contains("IsEnabled=\"{Binding CanRaiseTrax}\"", dock);
        Assert.Contains("Text=\"{Binding TraxVolumeDbLabel}\"", dock);
        Assert.Contains("Binding=\"{Binding IsMusicPlaying}\" Value=\"True\"", dock);
        Assert.Contains("Click=\"TraxPlayPause_Click\"", dock);

        // The bay DOES carry a ladder now — the player measures its own output, so "is music making
        // sound" is answerable without hearing it (a play glyph cannot answer that).
        // The TRAX row lives under the desktop volume, inside the GAME bay.
        var traxRow = dock[dock.IndexOf("Text=\"TRAX\"", System.StringComparison.Ordinal)
                           ..dock.IndexOf("Text=\"LIP-SYNC\"", System.StringComparison.Ordinal)];
        Assert.Contains("TraxTrackLabel", traxRow);
        Assert.DoesNotContain("SegmentMeter", traxRow);

        foreach (var name in new[] { "TraxVolumeDb", "TraxVolumeDbLabel", "TraxTrackLabel", "CanRaiseTrax", "CanLowerTrax" })
            Assert.NotNull(typeof(MainViewModel).GetProperty(name));

        // The player gained a real user level, separate from the mute-follow LocalGain.
        Assert.NotNull(typeof(ITraxPlayer).GetProperty("UserGain"));
        Assert.NotNull(typeof(ITraxPlayer).GetProperty("Level"));
        Assert.NotNull(typeof(MusicPlayer).GetProperty("UserGain"));

        // It starts as background: −50 dB, and the ±5 dB steps are how it moves.
        Assert.Equal(-50, MainViewModel.TraxDefaultDb);
        Assert.Equal(5, MainViewModel.TraxStepDb);
        Assert.Equal(0, GainDb.ToDb(1f), 6);
        Assert.Contains("∞", GainDb.Label(GainDb.FloorDb));   // true silence, not "-60.0"
    }
}