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. It got its OWN bay
/// and its own meter on 2026-11-01 (creator ruling): the player measures its real output, so the
/// ladder is not decorative, and living inside the game bay hid whether the bed was playing.
/// 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_is_its_own_bay_with_a_real_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);

        // TRAX is its own bay, between GAME and LIP-SYNC, and it carries a real ladder bound to the
        // player's own level — "is the bed making sound" is not answerable from a play glyph.
        var traxRow = dock[dock.IndexOf("<!-- TRAX: its own bay", System.StringComparison.Ordinal)
                           ..dock.IndexOf("<!-- LIP-SYNC", System.StringComparison.Ordinal)];
        Assert.Contains("TraxTrackLabel", traxRow);
        Assert.Contains("SegmentMeter", traxRow);
        Assert.Contains("Level=\"{Binding TraxMeterFraction}\"", traxRow);

        // …and the GAME bay no longer embeds it.
        var gameBay = dock[dock.IndexOf("<!-- GAME / PC", System.StringComparison.Ordinal)
                           ..dock.IndexOf("<!-- TRAX: its own bay", System.StringComparison.Ordinal)];
        Assert.DoesNotContain("TraxTrackLabel", gameBay);

        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"
    }
}