using UnityEngine;
using UnityEngine.Rendering.HighDefinition;
using UnityEngine.Rendering;

// Include material common properties names
using static UnityEngine.Rendering.HighDefinition.HDMaterialProperties;

namespace UnityEditor.Rendering.HighDefinition
{
    /// <summary>
    /// GUI for HDRP Lit materials (and tesselation), does not include shader graph + function to setup material keywords for Lit
    /// </summary>
    class LitGUI : HDShaderGUI
    {
        // For lit GUI we don't display the heightmap nor layering options
        const LitSurfaceInputsUIBlock.Features litSurfaceFeatures = LitSurfaceInputsUIBlock.Features.All ^ LitSurfaceInputsUIBlock.Features.HeightMap ^ LitSurfaceInputsUIBlock.Features.LayerOptions;

        MaterialUIBlockList uiBlocks = new MaterialUIBlockList
        {
            new SurfaceOptionUIBlock(MaterialUIBlock.ExpandableBit.Base, features: SurfaceOptionUIBlock.Features.Lit),
            new TessellationOptionsUIBlock(MaterialUIBlock.ExpandableBit.Tessellation),
            new LitSurfaceInputsUIBlock(MaterialUIBlock.ExpandableBit.Input, features: litSurfaceFeatures),
            new DetailInputsUIBlock(MaterialUIBlock.ExpandableBit.Detail),
            // We don't want distortion in Lit
            new TransparencyUIBlock(MaterialUIBlock.ExpandableBit.Transparency, features: TransparencyUIBlock.Features.All & ~TransparencyUIBlock.Features.Distortion),
            new EmissionUIBlock(MaterialUIBlock.ExpandableBit.Emissive),
            new AdvancedOptionsUIBlock(MaterialUIBlock.ExpandableBit.Advance, AdvancedOptionsUIBlock.Features.StandardLit),
        };

        protected override void OnMaterialGUI(MaterialEditor materialEditor, MaterialProperty[] props)
        {
            uiBlocks.OnGUI(materialEditor, props);
        }

        public override void ValidateMaterial(Material material) => LitAPI.ValidateMaterial(material);

    }
} // namespace UnityEditor