using System.Text;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using GmodAssetImporter;

[TestClass]
public class VmatWriterTests
{
	[TestMethod]
	public void EmitsAutoGeneratedHeaderAndComplexShader()
	{
		var text = VmatWriter.Build( new VmatWriteRequest
		{
			ColorTextureAssetPath = "materials/test/source_files/gun_color.png",
			NormalTextureAssetPath = "materials/test/source_files/gun_normal.png"
		} );

		Assert.IsTrue( text.StartsWith( "// THIS FILE IS AUTO-GENERATED" ) );
		Assert.IsTrue( text.Contains( "shaders/complex.shader" ) );
		Assert.IsTrue( text.Contains( "TextureColor \"materials/test/source_files/gun_color.png\"" ) );
		Assert.IsTrue( text.Contains( "TextureNormal \"materials/test/source_files/gun_normal.png\"" ) );

		var bytes = new UTF8Encoding( false ).GetBytes( text );
		Assert.AreEqual( (byte)'/', bytes[0] );
		Assert.AreEqual( (byte)'/', bytes[1] );
	}

	[TestMethod]
	public void IncludesTranslucentAndSelfIllumWhenRequested()
	{
		var text = VmatWriter.Build( new VmatWriteRequest
		{
			ColorTextureAssetPath = "materials/a/source_files/a_color.png",
			Translucent = true,
			SelfIllumTextureAssetPath = "materials/a/source_files/a_selfillum.png"
		} );

		Assert.IsTrue( text.Contains( "F_TRANSLUCENT 1" ) );
		Assert.IsTrue( text.Contains( "F_SELF_ILLUM 1" ) );
		Assert.IsTrue( text.Contains( "TextureSelfIllumMask" ) );
	}
}