using AcDream.App.Rendering.Gpu.Gl;

namespace AcDream.App.Tests.Rendering.Gpu.Gl;

public sealed class GlPushConstantUniformNamesTests
{
    [Fact]
    public void EveryDocumentedFieldMapsToItsDocumentedUniformName()
    {
        Assert.Equal("uViewProjection", GlPushConstantUniformNames.ByFieldName["ViewProjection"]);
        Assert.Equal("uDrawIDOffset", GlPushConstantUniformNames.ByFieldName["DrawIdOffset"]);
        Assert.Equal("uLightingMode", GlPushConstantUniformNames.ByFieldName["LightingMode"]);
        Assert.Equal("uRenderPass", GlPushConstantUniformNames.ByFieldName["RenderPass"]);
        Assert.Equal("uLightDebug", GlPushConstantUniformNames.ByFieldName["LightDebug"]);
        Assert.Equal("uTextureIndexA", GlPushConstantUniformNames.ByFieldName["TextureIndexA"]);
        Assert.Equal("uTextureIndexB", GlPushConstantUniformNames.ByFieldName["TextureIndexB"]);
        Assert.Equal("uParamA", GlPushConstantUniformNames.ByFieldName["ParamA"]);
        Assert.Equal("uParamB", GlPushConstantUniformNames.ByFieldName["ParamB"]);
    }

    [Fact]
    public void TableCoversEveryFieldOnTheSharedStructWithNoStaleEntries()
    {
        // This is the drift guard: if a later slice adds/removes/renames a
        // GpuPushConstants field without updating the mapping table, this
        // test fails instead of the GL backend silently skipping a uniform.
        GlPushConstantUniformNames.AssertMapsEveryField();
    }

    [Fact]
    public void TableHasExactlyNineEntries()
    {
        Assert.Equal(9, GlPushConstantUniformNames.ByFieldName.Count);
    }
}