Shader "NiloToon/Environment/Reflection Demo"
{
    Properties
    {
        [Header(Base Properties)]
        _BaseMap ("Base Map", 2D) = "white" {}
        _BaseColor ("Base Color", Color) = (1, 1, 1, 1)
        
        [Header(Surface Properties)]
        _Metallic ("Metallic", Range(0, 1)) = 0.5
        _Smoothness ("Smoothness", Range(0, 1)) = 0.5
        
        [Header(Normal)]
        _BumpMap ("Normal Map", 2D) = "bump" {}
        _BumpScale ("Normal Scale", Float) = 1.0
        
        [Header(Planar Reflection)]
        [Toggle] _EnablePlanarReflection ("Enable Planar Reflection", Float) = 1
        _ReflectionIntensity ("Reflection Intensity", Range(0, 2)) = 1.0
        _ReflectionTintColor ("Reflection Tint", Color) = (1, 1, 1, 1)
        _ReflectionFresnel ("Fresnel Power", Range(0.1, 5)) = 1.5
        _ReflectionDistortion ("Distortion", Range(0, 0.1)) = 0.02
        _ReflectionDepthFade ("Depth Fade", Range(0, 10)) = 1.0
        _ReflectionBlurRadius ("Blur Radius", Range(0, 2)) = 0.5
        
        [Header(Advanced)]
        _Cutoff ("Alpha Cutoff", Range(0, 1)) = 0.5
        
        // Unity Standard Properties
        _Surface ("Surface Type", Float) = 0.0
    }
    
    SubShader
    {
        Tags 
        { 
            "RenderType" = "Opaque" 
            "RenderPipeline" = "UniversalPipeline"
            "Queue" = "Geometry"
        }
        
        LOD 300
        
        Pass
        {
            Name "ForwardLit"
            Tags { "LightMode" = "UniversalForward" }
            
            HLSLPROGRAM
            #pragma target 3.0
            
            // Universal Pipeline keywords
            #pragma multi_compile _ _MAIN_LIGHT_SHADOWS _MAIN_LIGHT_SHADOWS_CASCADE _MAIN_LIGHT_SHADOWS_SCREEN
            #pragma multi_compile _ _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_LIGHTS
            #pragma multi_compile_fragment _ _ADDITIONAL_LIGHT_SHADOWS
            #pragma multi_compile_fragment _ _SHADOWS_SOFT
            #pragma multi_compile_fragment _ _SCREEN_SPACE_OCCLUSION
            #pragma multi_compile _ LIGHTMAP_SHADOW_MIXING
            #pragma multi_compile _ SHADOWS_SHADOWMASK
            #pragma multi_compile _ DIRLIGHTMAP_COMBINED
            #pragma multi_compile _ LIGHTMAP_ON
            #pragma multi_compile _ DYNAMICLIGHTMAP_ON
            #pragma multi_compile_fog
            
            // Material keywords
            #pragma shader_feature_local _NORMALMAP
            #pragma shader_feature_local _METALLICSPECGLOSSMAP
            #pragma shader_feature_local _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
            #pragma shader_feature_local _OCCLUSIONMAP
            #pragma shader_feature_local _EMISSION
            #pragma shader_feature_local _ALPHATEST_ON
            #pragma shader_feature_local _ALPHAPREMULTIPLY_ON
            #pragma shader_feature_local _RECEIVE_SHADOWS_OFF
            
            // Custom keywords for reflection
            #pragma shader_feature_local _ENABLE_PLANAR_REFLECTION
            #pragma shader_feature_local _REFLECTION_DEPTH_FADE
            
            // Instancing
            #pragma multi_compile_instancing
            #pragma multi_compile _ DOTS_INSTANCING_ON
            
            #pragma vertex LitPassVertex
            #pragma fragment LitPassFragment
            
            // Include URP Lit shaders (NiloToon extension will be applied globally)
            #include "Packages/com.unity.render-pipelines.universal/Shaders/LitInput.hlsl"
            #include "Packages/com.unity.render-pipelines.universal/Shaders/LitForwardPass.hlsl"
            
            ENDHLSL
        }
        
        // Shadow Caster Pass
        Pass
        {
            Name "ShadowCaster"
            Tags { "LightMode" = "ShadowCaster" }

            ZWrite On
            ZTest LEqual
            ColorMask 0
            Cull[_Cull]

            HLSLPROGRAM
            #pragma target 2.0

            #pragma shader_feature_local_fragment _ALPHATEST_ON
            #pragma shader_feature_local_fragment _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A

            #pragma multi_compile_instancing
            #pragma multi_compile _ DOTS_INSTANCING_ON

            #pragma vertex ShadowPassVertex
            #pragma fragment ShadowPassFragment

            #include "Packages/com.unity.render-pipelines.universal/Shaders/LitInput.hlsl"
            #include "Packages/com.unity.render-pipelines.universal/Shaders/ShadowCasterPass.hlsl"
            ENDHLSL
        }
        
        // Depth Only Pass
        Pass
        {
            Name "DepthOnly"
            Tags { "LightMode" = "DepthOnly" }

            ZWrite On
            ColorMask 0
            Cull[_Cull]

            HLSLPROGRAM
            #pragma target 2.0

            #pragma shader_feature_local_fragment _ALPHATEST_ON
            #pragma shader_feature_local_fragment _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A

            #pragma multi_compile_instancing
            #pragma multi_compile _ DOTS_INSTANCING_ON

            #pragma vertex DepthOnlyVertex
            #pragma fragment DepthOnlyFragment

            #include "Packages/com.unity.render-pipelines.universal/Shaders/LitInput.hlsl"
            #include "Packages/com.unity.render-pipelines.universal/Shaders/DepthOnlyPass.hlsl"
            ENDHLSL
        }
        
        // Meta Pass (for Lightmapping)
        Pass
        {
            Name "Meta"
            Tags { "LightMode" = "Meta" }

            Cull Off

            HLSLPROGRAM
            #pragma target 2.0

            #pragma shader_feature EDITOR_VISUALIZATION
            #pragma shader_feature_local_fragment _SPECULAR_SETUP
            #pragma shader_feature_local_fragment _EMISSION
            #pragma shader_feature_local_fragment _METALLICSPECGLOSSMAP
            #pragma shader_feature_local_fragment _ALPHATEST_ON
            #pragma shader_feature_local_fragment _ _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
            #pragma shader_feature_local _ _DETAIL_MULX2 _DETAIL_SCALED

            #pragma vertex UniversalVertexMeta
            #pragma fragment UniversalFragmentMeta

            #include "Packages/com.unity.render-pipelines.universal/Shaders/LitInput.hlsl"
            #include "Packages/com.unity.render-pipelines.universal/Shaders/LitMetaPass.hlsl"

            ENDHLSL
        }
    }
    
    CustomEditor "UnityEditor.Rendering.Universal.ShaderGUI.LitShader"
    Fallback "Hidden/Universal Render Pipeline/FallbackError"
}