using UnityEngine;
using System.Collections.Generic;

namespace UnityEditor.Experimental.Rendering.HDPipeline
{
	public class UnlitsToHDUnlitUpgrader : MaterialUpgrader
	{
		string Unlit_Color = "Unlit/Color";
		string Unlit_Texture = "Unlit/Texture";
		string Unlit_Transparent = "Unlit/Transparent";
		string Unlit_Cutout = "Unlit/Transparent Cutout";

		public UnlitsToHDUnlitUpgrader(string sourceShaderName, string destShaderName, MaterialFinalizer finalizer = null)
        {
            RenameShader(sourceShaderName, destShaderName, finalizer);

			if (sourceShaderName == Unlit_Color)
            	RenameColor("_Color", "_UnlitColor");
			else // all other unlit have a texture
            	RenameTexture("_MainTex", "_UnlitColorMap");

			if (sourceShaderName == Unlit_Cutout)
			{
            	RenameFloat("_Cutoff", "_AlphaCutoff");
				SetFloat("_AlphaCutoffEnable", 1f);
			}
			else
				SetFloat("_AlphaCutoffEnable", 0f);


			SetFloat("_SurfaceType", (sourceShaderName == Unlit_Transparent)? 1f : 0f );

		}

		public override void Convert(Material srcMaterial, Material dstMaterial)
        {
            //dstMaterial.hideFlags = HideFlags.DontUnloadUnusedAsset;

            base.Convert(srcMaterial, dstMaterial);
            
            HDEditorUtils.ResetMaterialKeywords(dstMaterial);
		}
	}
}