/*
Complementary Shaders by EminGT, based on BSL Shaders by Capt Tatsu
*/

//Common//
#include "/lib/common.glsl"

//Varyings//
varying vec2 texCoord, lmCoord;

varying vec3 normal;
varying vec3 sunVec, upVec;

varying vec4 color;

#ifdef ADV_MAT
	#if defined PARALLAX || defined SELF_SHADOW
		varying float dist;
		varying vec3 viewVector;
	#endif

	#if !defined COMPBR || defined NORMAL_MAPPING
		varying vec4 vTexCoord;
		varying vec4 vTexCoordAM;
	#endif

	#ifdef NORMAL_MAPPING
		varying vec3 binormal, tangent;
	#endif
#endif

//////////Fragment Shader//////////Fragment Shader//////////Fragment Shader//////////
#ifdef FSH

//Uniforms//
uniform int frameCounter;
uniform int heldItemId, heldItemId2;
uniform int isEyeInWater;
uniform int moonPhase;
#define UNIFORM_moonPhase

uniform float frameTimeCounter;
uniform float nightVision;
uniform float rainStrengthS;
uniform float screenBrightness;
uniform float viewWidth, viewHeight;

uniform ivec2 eyeBrightnessSmooth;
uniform ivec2 atlasSize;

uniform vec3 fogColor;
uniform vec3 cameraPosition;

uniform mat4 gbufferProjectionInverse;
uniform mat4 gbufferModelViewInverse;
uniform mat4 shadowProjection;
uniform mat4 shadowModelView;

uniform sampler2D texture;

#ifdef DYNAMIC_SHADER_LIGHT
	uniform int heldBlockLightValue;
	uniform int heldBlockLightValue2;
#endif

#if ((defined WATER_CAUSTICS || defined CLOUD_SHADOW) && defined OVERWORLD) || defined RANDOM_BLOCKLIGHT
	uniform sampler2D noisetex;
#endif

#if defined ADV_MAT && !defined COMPBR
	uniform sampler2D specular;
	uniform sampler2D normals;
#endif

#ifdef COLORED_LIGHT
	uniform sampler2D colortex9;
#endif

#if MC_VERSION >= 11900
	uniform float darknessLightFactor;
#endif

//Common Variables//
float eBS = eyeBrightnessSmooth.y / 240.0;
float sunVisibility = clamp(dot( sunVec,upVec) + 0.0625, 0.0, 0.125) * 8.0;
float vsBrightness = clamp(screenBrightness, 0.0, 1.0);

#if WORLD_TIME_ANIMATION >= 2
	float frametime = float(worldTime) * 0.05 * ANIMATION_SPEED;
#else
	float frametime = frameTimeCounter * ANIMATION_SPEED;
#endif

#if defined ADV_MAT && RP_SUPPORT > 2
	vec2 dcdx = dFdx(texCoord.xy);
	vec2 dcdy = dFdy(texCoord.xy);
#endif

#ifdef OVERWORLD
	vec3 lightVec = sunVec * ((timeAngle < 0.5325 || timeAngle > 0.9675) ? 1.0 : -1.0);
#else
	vec3 lightVec = sunVec;
#endif

//Common Functions//
float GetLuminance(vec3 color) {
	return dot(color,vec3(0.299, 0.587, 0.114));
}

//Includes//
#include "/lib/color/blocklightColor.glsl"
#include "/lib/color/dimensionColor.glsl"
#include "/lib/util/spaceConversion.glsl"

#ifdef WATER_CAUSTICS
#ifdef OVERWORLD
#include "/lib/color/waterColor.glsl"
#endif
#endif

#include "/lib/lighting/forwardLighting.glsl"

#ifdef ADV_MAT
#include "/lib/util/encode.glsl"
#include "/lib/lighting/ggx.glsl"

#ifndef COMPBR
#include "/lib/surface/materialGbuffers.glsl"
#endif

#if defined PARALLAX || defined SELF_SHADOW
#include "/lib/surface/parallax.glsl"
#endif
#endif

//Program//
void main() {
	vec4 albedoP = texture2D(texture, texCoord);
	vec4 albedo = albedoP * color;
	
	vec3 newNormal = normal;
	float skymapMod = 0.0;

	#ifdef ADV_MAT
		float smoothness = 0.0, metalData = 0.0, metalness = 0.0, f0 = 0.0;
		vec3 rawAlbedo = vec3(0.0);
		vec4 normalMap = vec4(0.0, 0.0, 1.0, 1.0);

		#if !defined COMPBR || defined NORMAL_MAPPING
			vec2 newCoord = vTexCoord.st * vTexCoordAM.pq + vTexCoordAM.st;
		#endif
		
		#if defined PARALLAX || defined SELF_SHADOW
			float skipParallax = float(heldItemId == 358 || heldItemId2 == 358);
			#ifdef COMPATIBILITY_MODE
				skipParallax += float(heldItemId > 2000 || heldItemId2 > 2000);
			#endif
			vec3 parallaxTraceCoordDepth = vec3(newCoord, 1.0);
			vec2 parallaxLocalCoord = vTexCoord.st;
			float parallaxTexDepth = 1.0;
		#endif
		
		#ifdef PARALLAX
			if (skipParallax < 0.5) {
				parallaxLocalCoord = GetParallaxCoord(0.0, newCoord, parallaxTexDepth, parallaxTraceCoordDepth);
				albedo = textureGrad(texture, newCoord, dcdx, dcdy) * color;
			}
		#endif
	#endif
	
	#ifndef COMPATIBILITY_MODE
		float albedocheck = albedo.a;
	#else
		float albedocheck = 1.0; //needed for "Joy of Painting" mod support + more
	#endif

	if (albedocheck > 0.00001) {
		if (albedo.a > 0.99) albedo.a = 1.0;

		vec2 lightmap = clamp(lmCoord, vec2(0.0), vec2(1.0));

		float emissive = 0.0;

		vec3 screenPos = vec3(gl_FragCoord.xy / vec2(viewWidth, viewHeight), gl_FragCoord.z + 0.38);
		vec3 viewPos = ScreenToView(screenPos);
		vec3 worldPos = ViewToWorld(viewPos);

		float materialAO = 1.0;
		#ifdef ADV_MAT
			#ifndef COMPBR
				GetMaterials(smoothness, metalness, f0, metalData, emissive, materialAO, normalMap, newCoord, dcdx, dcdy);
			#endif

			#ifdef NORMAL_MAPPING
				mat3 tbnMatrix = mat3(tangent.x, binormal.x, normal.x,
									  tangent.y, binormal.y, normal.y,
									  tangent.z, binormal.z, normal.z);

				if (normalMap.x > -0.999 && normalMap.y > -0.999) {
					#ifdef PARALLAX_SLOPE_NORMALS
						float slopeThreshold = max(1.0 / PARALLAX_QUALITY, 1.0/255.0);
						if (parallaxTexDepth - parallaxTraceCoordDepth.z > slopeThreshold) {
							normalMap.xyz = GetParallaxSlopeNormal(parallaxLocalCoord, parallaxTraceCoordDepth.z, viewVector);
						}
					#endif

					newNormal = clamp(normalize(normalMap.xyz * tbnMatrix), vec3(-1.0), vec3(1.0));
				}
			#endif
		#endif

		albedo.rgb = pow(albedo.rgb, vec3(2.2));

		#ifdef WHITE_WORLD
			albedo.rgb = vec3(0.5);
		#endif

		float NdotL = clamp(dot(newNormal, lightVec) * 1.01 - 0.01, 0.0, 1.0);

		float quarterNdotU = clamp(0.25 * dot(newNormal, upVec) + 0.75, 0.5, 1.0);
			  quarterNdotU*= quarterNdotU;

		float parallaxShadow = 1.0;
		#ifdef ADV_MAT
			rawAlbedo = albedo.rgb * 0.999 + 0.001;
			#ifdef REFLECTION_SPECULAR
				#ifdef COMPBR
					if (metalness > 0.80) {
						albedo.rgb *= (1.0 - metalness*0.65);
					}
				#else
					albedo.rgb *= (1.0 - metalness*0.65);
				#endif
			#endif

			float doParallax = 0.0;
			#ifdef SELF_SHADOW
				#ifdef OVERWORLD
					doParallax = float(lightmap.y > 0.0 && NdotL > 0.0 && skipParallax < 0.5);
				#endif
				#ifdef END
					doParallax = float(NdotL > 0.0 && skipParallax < 0.5);
				#endif
				
				if (doParallax > 0.5) {
					parallaxShadow = GetParallaxShadow(0.0, parallaxLocalCoord, lightVec, tbnMatrix, parallaxTraceCoordDepth.z, normalMap.a);
					NdotL *= parallaxShadow;
				}
			#endif
		#endif
		
		vec3 shadow = vec3(0.0);
		vec3 lightAlbedo = vec3(0.0);
		GetLighting(albedo.rgb, shadow, lightAlbedo, viewPos, 0.0, worldPos, lightmap, 1.0, NdotL, quarterNdotU,
					parallaxShadow, emissive, 0.0, 0.0, materialAO);

		#ifdef ADV_MAT
			#if defined OVERWORLD || defined END
				#ifdef OVERWORLD
					vec3 lightME = mix(lightMorning, lightEvening, mefade);
					vec3 lightDayTint = lightDay * lightME * LIGHT_DI;
					vec3 lightDaySpec = mix(lightME, sqrt(lightDayTint), timeBrightness);
					vec3 specularColor = mix(sqrt(lightNight*0.3),
												lightDaySpec,
												sunVisibility);
					#ifdef WATER_CAUSTICS
						if (isEyeInWater == 1) specularColor *= underwaterColor.rgb * 8.0;
					#endif
					specularColor *= specularColor;

					#ifdef SPECULAR_SKY_REF
						float skymapModM = lmCoord.y;
						#if SKY_REF_FIX_1 == 1
							skymapModM = skymapModM * skymapModM;
						#elif SKY_REF_FIX_1 == 2
							skymapModM = max(skymapModM - 0.80, 0.0) * 5.0;
						#else
							skymapModM = max(skymapModM - 0.99, 0.0) * 100.0;
						#endif
						if (!(metalness <= 0.004 && metalness > 0.0)) skymapMod = max(skymapMod, skymapModM * 0.1);
					#endif
				#endif
				#ifdef END
					vec3 specularColor = endCol;
				#endif
				
				#ifdef SPECULAR_SKY_REF
					vec3 specularHighlight = GetSpecularHighlight(smoothness, metalness, f0, specularColor, rawAlbedo,
													shadow, newNormal, viewPos);
					#if	defined ADV_MAT && defined NORMAL_MAPPING && defined SELF_SHADOW
						specularHighlight *= parallaxShadow;
					#endif
					#ifdef LIGHT_LEAK_FIX
						if (isEyeInWater == 0) specularHighlight *= pow(lightmap.y, 2.5);
						else specularHighlight *= 0.15 + 0.85 * pow(lightmap.y, 2.5);
					#endif
					albedo.rgb += specularHighlight;
				#endif
			#endif

			#if defined COMPBR && defined REFLECTION_SPECULAR
				smoothness *= 0.5;
			#endif
		#endif		
			
		#ifdef GBUFFER_CODING
			albedo.rgb = vec3(0.0, 170.0, 0.0) / 255.0;
			albedo.rgb = pow(albedo.rgb, vec3(2.2)) * 0.2;
		#endif
	} else discard;

	/* DRAWBUFFERS:0 */
	gl_FragData[0] = albedo;

	#if defined ADV_MAT && defined REFLECTION_SPECULAR
	/* DRAWBUFFERS:0361 */
	gl_FragData[1] = vec4(smoothness, metalData, skymapMod, 1.0);
	gl_FragData[2] = vec4(EncodeNormal(newNormal), 0.0, 1.0);
	gl_FragData[3] = vec4(rawAlbedo, 1.0);
	#endif
}

#endif

//////////Vertex Shader//////////Vertex Shader//////////Vertex Shader//////////
#ifdef VSH

//Uniforms//

uniform float frameTimeCounter;

uniform vec3 cameraPosition;

uniform mat4 gbufferModelView, gbufferModelViewInverse;

//Attributes//
attribute vec4 mc_Entity;

#ifdef ADV_MAT
attribute vec4 mc_midTexCoord;
attribute vec4 at_tangent;
#endif

//Common Variables//
#if WORLD_TIME_ANIMATION >= 2
	float frametime = float(worldTime) * 0.05 * ANIMATION_SPEED;
#else
	float frametime = frameTimeCounter * ANIMATION_SPEED;
#endif

#ifdef OVERWORLD
	float timeAngleM = timeAngle;
#else
	#if !defined SEVEN && !defined SEVEN_2
		float timeAngleM = 0.25;
	#else
		float timeAngleM = 0.5;
	#endif
#endif

//Includes//
#ifdef WORLD_CURVATURE
	#include "/lib/vertex/worldCurvature.glsl"
#endif

//Program//
void main() {
	texCoord = (gl_TextureMatrix[0] * gl_MultiTexCoord0).xy;

	lmCoord = (gl_TextureMatrix[1] * gl_MultiTexCoord1).xy;
	lmCoord = clamp(lmCoord, vec2(0.0), vec2(1.0));
	lmCoord.x -= max(lmCoord.x - 0.825, 0.0) * 0.75;

	normal = normalize(gl_NormalMatrix * gl_Normal);

	#ifdef ADV_MAT
		#if defined NORMAL_MAPPING
			binormal = normalize(gl_NormalMatrix * cross(at_tangent.xyz, gl_Normal.xyz) * at_tangent.w);
			tangent  = normalize(gl_NormalMatrix * at_tangent.xyz);
			
			#if defined PARALLAX || defined SELF_SHADOW
				mat3 tbnMatrix = mat3(tangent.x, binormal.x, normal.x,
									  tangent.y, binormal.y, normal.y,
									  tangent.z, binormal.z, normal.z);
			
				viewVector = tbnMatrix * (gl_ModelViewMatrix * gl_Vertex).xyz;
				dist = length(gl_ModelViewMatrix * gl_Vertex);
			#endif
		#endif

		vec2 midCoord = (gl_TextureMatrix[0] *  mc_midTexCoord).st;
		vec2 texMinMidCoord = texCoord - midCoord;

		#if !defined COMPBR || defined NORMAL_MAPPING
			vTexCoordAM.pq  = abs(texMinMidCoord) * 2;
			vTexCoordAM.st  = min(texCoord, midCoord - texMinMidCoord);
			
			vTexCoord.xy    = sign(texMinMidCoord) * 0.5 + 0.5;
		#endif
	#endif
	
	color = gl_Color;
	
	const vec2 sunRotationData = vec2(cos(sunPathRotation * 0.01745329251994), -sin(sunPathRotation * 0.01745329251994));
	float ang = fract(timeAngleM - 0.25);
	ang = (ang + (cos(ang * 3.14159265358979) * -0.5 + 0.5 - ang) / 3.0) * 6.28318530717959;
	sunVec = normalize((gbufferModelView * vec4(vec3(-sin(ang), cos(ang) * sunRotationData) * 2000.0, 1.0)).xyz);

	upVec = normalize(gbufferModelView[1].xyz);

	#ifdef WORLD_CURVATURE
		vec4 position = gbufferModelViewInverse * gl_ModelViewMatrix * gl_Vertex;
		if (gl_ProjectionMatrix[2][2] < -0.5) position.y -= WorldCurvature(position.xz);
		gl_Position = gl_ProjectionMatrix * gbufferModelView * position;
	#else
		gl_Position = ftransform();
	#endif

	if (HAND_SWAY > 0.001) {
		gl_Position.x += HAND_SWAY * (sin(frametime * 0.86)) / 256.0;
		gl_Position.y += HAND_SWAY * (cos(frametime * 1.5)) / 64.0;
	}

	#if DOF == 1
		//gl_Position.x += pow2(1.0 - (gl_Position.x + 1.0) * 0.5);
	#endif

	#ifdef OVERDRAW
		gl_Position.xy *= 0.6666666666666;
	#endif
}

#endif