using AcDream.UI.Abstractions.Panels.Settings;

namespace AcDream.UI.Abstractions.Tests.Panels.Settings;

/// <summary>
/// L.0: <see cref="AudioSettings"/> default-pin tests. Defaults must
/// match the OpenAL engine's hard-coded constructor values so a user
/// who has never opened the Audio tab gets identical behaviour to the
/// pre-Phase-L world.
/// </summary>
public sealed class AudioSettingsTests
{
    [Fact]
    public void Default_values_match_engine_constructor_defaults()
    {
        // OpenAlAudioEngine ctor: Master=1.0, Music=0.7, Sfx=1.0,
        // Ambient=0.8 — see src/AcDream.App/Audio/OpenAlAudioEngine.cs.
        var d = AudioSettings.Default;
        Assert.Equal(1.0f, d.Master);
        Assert.Equal(0.7f, d.Music);
        Assert.Equal(1.0f, d.Sfx);
        Assert.Equal(0.8f, d.Ambient);
    }

    [Fact]
    public void Equality_is_value_based()
    {
        var a = AudioSettings.Default;
        var b = AudioSettings.Default with { Master = 0.5f };
        var c = AudioSettings.Default with { Master = 0.5f };
        Assert.NotEqual(a, b);
        Assert.Equal(b, c);
    }

    [Fact]
    public void With_expression_clones_one_field()
    {
        var d = AudioSettings.Default with { Music = 0.25f };
        Assert.Equal(0.25f, d.Music);
        // Other fields untouched.
        Assert.Equal(AudioSettings.Default.Master, d.Master);
        Assert.Equal(AudioSettings.Default.Sfx, d.Sfx);
    }
}