package net.minecraft.data.worldgen;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableList.Builder;
import net.minecraft.core.HolderGetter;
import net.minecraft.world.level.biome.Biome;
import net.minecraft.world.level.biome.Biomes;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.level.levelgen.Noises;
import net.minecraft.world.level.levelgen.SurfaceRules;
import net.minecraft.world.level.levelgen.VerticalAnchor;

public class SurfaceRuleData {
	private static final SurfaceRules.RuleSource AIR = makeStateRule(Blocks.AIR);
	private static final SurfaceRules.RuleSource BEDROCK = makeStateRule(Blocks.BEDROCK);
	private static final SurfaceRules.RuleSource WHITE_TERRACOTTA = makeStateRule(Blocks.DYED_TERRACOTTA.white());
	private static final SurfaceRules.RuleSource ORANGE_TERRACOTTA = makeStateRule(Blocks.DYED_TERRACOTTA.orange());
	private static final SurfaceRules.RuleSource TERRACOTTA = makeStateRule(Blocks.TERRACOTTA);
	private static final SurfaceRules.RuleSource RED_SAND = makeStateRule(Blocks.RED_SAND);
	private static final SurfaceRules.RuleSource RED_SANDSTONE = makeStateRule(Blocks.RED_SANDSTONE);
	private static final SurfaceRules.RuleSource STONE = makeStateRule(Blocks.STONE);
	private static final SurfaceRules.RuleSource DEEPSLATE = makeStateRule(Blocks.DEEPSLATE);
	private static final SurfaceRules.RuleSource DIRT = makeStateRule(Blocks.DIRT);
	private static final SurfaceRules.RuleSource PODZOL = makeStateRule(Blocks.PODZOL);
	private static final SurfaceRules.RuleSource COARSE_DIRT = makeStateRule(Blocks.COARSE_DIRT);
	private static final SurfaceRules.RuleSource MYCELIUM = makeStateRule(Blocks.MYCELIUM);
	private static final SurfaceRules.RuleSource GRASS_BLOCK = makeStateRule(Blocks.GRASS_BLOCK);
	private static final SurfaceRules.RuleSource CALCITE = makeStateRule(Blocks.CALCITE);
	private static final SurfaceRules.RuleSource GRAVEL = makeStateRule(Blocks.GRAVEL);
	private static final SurfaceRules.RuleSource SAND = makeStateRule(Blocks.SAND);
	private static final SurfaceRules.RuleSource SANDSTONE = makeStateRule(Blocks.SANDSTONE);
	private static final SurfaceRules.RuleSource PACKED_ICE = makeStateRule(Blocks.PACKED_ICE);
	private static final SurfaceRules.RuleSource SNOW_BLOCK = makeStateRule(Blocks.SNOW_BLOCK);
	private static final SurfaceRules.RuleSource MUD = makeStateRule(Blocks.MUD);
	private static final SurfaceRules.RuleSource POWDER_SNOW = makeStateRule(Blocks.POWDER_SNOW);
	private static final SurfaceRules.RuleSource ICE = makeStateRule(Blocks.ICE);
	private static final SurfaceRules.RuleSource WATER = makeStateRule(Blocks.WATER);
	private static final SurfaceRules.RuleSource LAVA = makeStateRule(Blocks.LAVA);
	private static final SurfaceRules.RuleSource NETHERRACK = makeStateRule(Blocks.NETHERRACK);
	private static final SurfaceRules.RuleSource SOUL_SAND = makeStateRule(Blocks.SOUL_SAND);
	private static final SurfaceRules.RuleSource SOUL_SOIL = makeStateRule(Blocks.SOUL_SOIL);
	private static final SurfaceRules.RuleSource BASALT = makeStateRule(Blocks.BASALT);
	private static final SurfaceRules.RuleSource BLACKSTONE = makeStateRule(Blocks.BLACKSTONE);
	private static final SurfaceRules.RuleSource WARPED_WART_BLOCK = makeStateRule(Blocks.WARPED_WART_BLOCK);
	private static final SurfaceRules.RuleSource WARPED_NYLIUM = makeStateRule(Blocks.WARPED_NYLIUM);
	private static final SurfaceRules.RuleSource NETHER_WART_BLOCK = makeStateRule(Blocks.NETHER_WART_BLOCK);
	private static final SurfaceRules.RuleSource CRIMSON_NYLIUM = makeStateRule(Blocks.CRIMSON_NYLIUM);
	private static final SurfaceRules.RuleSource ENDSTONE = makeStateRule(Blocks.END_STONE);
	private static final SurfaceRules.RuleSource CINNABAR = makeStateRule(Blocks.CINNABAR);
	private static final SurfaceRules.RuleSource SULFUR = makeStateRule(Blocks.SULFUR);

	private static SurfaceRules.RuleSource makeStateRule(final Block block) {
		return SurfaceRules.state(block.defaultBlockState());
	}

	public static SurfaceRules.RuleSource overworld(final HolderGetter<Biome> biomes) {
		return overworldLike(biomes, true, false, true);
	}

	public static SurfaceRules.RuleSource overworldLike(
		final HolderGetter<Biome> biomes, final boolean doPreliminarySurfaceCheck, final boolean bedrockRoof, final boolean bedrockFloor
	) {
		SurfaceRules.ConditionSource woodedBadlandsTop = SurfaceRules.yBlockCheck(VerticalAnchor.absolute(97), 2);
		SurfaceRules.ConditionSource badlandsTop = SurfaceRules.yBlockCheck(VerticalAnchor.absolute(256), 0);
		SurfaceRules.ConditionSource badlandsHeightCondition = SurfaceRules.yStartCheck(VerticalAnchor.absolute(63), -1);
		SurfaceRules.ConditionSource badlandsMid = SurfaceRules.yStartCheck(VerticalAnchor.absolute(74), 1);
		SurfaceRules.ConditionSource mangroveSwampPuddleLevel = SurfaceRules.yBlockCheck(VerticalAnchor.absolute(60), 0);
		SurfaceRules.ConditionSource swampPuddleLevel = SurfaceRules.yBlockCheck(VerticalAnchor.absolute(62), 0);
		SurfaceRules.ConditionSource aboveOverworldSeaLevel = SurfaceRules.yBlockCheck(VerticalAnchor.absolute(63), 0);
		SurfaceRules.ConditionSource notUnderwater = SurfaceRules.waterBlockCheck(-1, 0);
		SurfaceRules.ConditionSource aboveWater = SurfaceRules.waterBlockCheck(0, 0);
		SurfaceRules.ConditionSource notUnderDeepWater = SurfaceRules.waterStartCheck(-6, -1);
		SurfaceRules.ConditionSource hole = SurfaceRules.hole();
		SurfaceRules.ConditionSource frozenOcean = SurfaceRules.isBiome(biomes, Biomes.FROZEN_OCEAN, Biomes.DEEP_FROZEN_OCEAN);
		SurfaceRules.ConditionSource steep = SurfaceRules.steep();
		SurfaceRules.RuleSource grassOrDirtIfUnderwater = SurfaceRules.sequence(SurfaceRules.ifTrue(aboveWater, GRASS_BLOCK), DIRT);
		SurfaceRules.RuleSource sandOrSandstoneIfCeiling = SurfaceRules.sequence(SurfaceRules.ifTrue(SurfaceRules.ON_CEILING, SANDSTONE), SAND);
		SurfaceRules.RuleSource gravelOrStoneIfCeiling = SurfaceRules.sequence(SurfaceRules.ifTrue(SurfaceRules.ON_CEILING, STONE), GRAVEL);
		SurfaceRules.ConditionSource biomesWithSandAndSandstone = SurfaceRules.isBiome(biomes, Biomes.WARM_OCEAN, Biomes.BEACH, Biomes.SNOWY_BEACH);
		SurfaceRules.ConditionSource biomesWithSandAndVeryDeepSandstone = SurfaceRules.isBiome(biomes, Biomes.DESERT);
		SurfaceRules.RuleSource commonSurfaceAndUnderRules = SurfaceRules.sequence(
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.STONY_PEAKS),
				SurfaceRules.sequence(SurfaceRules.ifTrue(SurfaceRules.noiseCondition2d(Noises.CALCITE, -0.0125, 0.0125), CALCITE), STONE)
			),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.STONY_SHORE),
				SurfaceRules.sequence(SurfaceRules.ifTrue(SurfaceRules.noiseCondition2d(Noises.GRAVEL, -0.05, 0.05), gravelOrStoneIfCeiling), STONE)
			),
			SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.WINDSWEPT_HILLS), SurfaceRules.ifTrue(surfaceNoiseAbove(1.0), STONE)),
			SurfaceRules.ifTrue(biomesWithSandAndSandstone, sandOrSandstoneIfCeiling),
			SurfaceRules.ifTrue(biomesWithSandAndVeryDeepSandstone, sandOrSandstoneIfCeiling),
			SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.DRIPSTONE_CAVES), STONE)
		);
		SurfaceRules.RuleSource powderSnowUnderRule = SurfaceRules.ifTrue(
			SurfaceRules.noiseCondition2d(Noises.POWDER_SNOW, 0.45, 0.58), SurfaceRules.ifTrue(aboveWater, POWDER_SNOW)
		);
		SurfaceRules.RuleSource powderSnowSurfaceRule = SurfaceRules.ifTrue(
			SurfaceRules.noiseCondition2d(Noises.POWDER_SNOW, 0.35, 0.6), SurfaceRules.ifTrue(aboveWater, POWDER_SNOW)
		);
		SurfaceRules.RuleSource biomeUnderSurfaceRule = SurfaceRules.sequence(
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.FROZEN_PEAKS),
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(steep, PACKED_ICE),
					SurfaceRules.ifTrue(SurfaceRules.noiseCondition2d(Noises.PACKED_ICE, -0.5, 0.2), PACKED_ICE),
					SurfaceRules.ifTrue(SurfaceRules.noiseCondition2d(Noises.ICE, -0.0625, 0.025), ICE),
					SurfaceRules.ifTrue(aboveWater, SNOW_BLOCK)
				)
			),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.SNOWY_SLOPES),
				SurfaceRules.sequence(SurfaceRules.ifTrue(steep, STONE), powderSnowUnderRule, SurfaceRules.ifTrue(aboveWater, SNOW_BLOCK))
			),
			SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.JAGGED_PEAKS), STONE),
			SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.GROVE), SurfaceRules.sequence(powderSnowUnderRule, DIRT)),
			commonSurfaceAndUnderRules,
			SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.WINDSWEPT_SAVANNA), SurfaceRules.ifTrue(surfaceNoiseAbove(1.75), STONE)),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.WINDSWEPT_GRAVELLY_HILLS),
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(surfaceNoiseAbove(2.0), gravelOrStoneIfCeiling),
					SurfaceRules.ifTrue(surfaceNoiseAbove(1.0), STONE),
					SurfaceRules.ifTrue(surfaceNoiseAbove(-1.0), DIRT),
					gravelOrStoneIfCeiling
				)
			),
			SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.MANGROVE_SWAMP), MUD),
			DIRT
		);
		SurfaceRules.RuleSource biomeSurfaceRule = SurfaceRules.sequence(
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.FROZEN_PEAKS),
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(steep, PACKED_ICE),
					SurfaceRules.ifTrue(SurfaceRules.noiseCondition2d(Noises.PACKED_ICE, 0.0, 0.2), PACKED_ICE),
					SurfaceRules.ifTrue(SurfaceRules.noiseCondition2d(Noises.ICE, 0.0, 0.025), ICE),
					SurfaceRules.ifTrue(aboveWater, SNOW_BLOCK)
				)
			),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.SNOWY_SLOPES),
				SurfaceRules.sequence(SurfaceRules.ifTrue(steep, STONE), powderSnowSurfaceRule, SurfaceRules.ifTrue(aboveWater, SNOW_BLOCK))
			),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.JAGGED_PEAKS), SurfaceRules.sequence(SurfaceRules.ifTrue(steep, STONE), SurfaceRules.ifTrue(aboveWater, SNOW_BLOCK))
			),
			SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.GROVE), SurfaceRules.sequence(powderSnowSurfaceRule, SurfaceRules.ifTrue(aboveWater, SNOW_BLOCK))),
			commonSurfaceAndUnderRules,
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.WINDSWEPT_SAVANNA),
				SurfaceRules.sequence(SurfaceRules.ifTrue(surfaceNoiseAbove(1.75), STONE), SurfaceRules.ifTrue(surfaceNoiseAbove(-0.5), COARSE_DIRT))
			),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.WINDSWEPT_GRAVELLY_HILLS),
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(surfaceNoiseAbove(2.0), gravelOrStoneIfCeiling),
					SurfaceRules.ifTrue(surfaceNoiseAbove(1.0), STONE),
					SurfaceRules.ifTrue(surfaceNoiseAbove(-1.0), grassOrDirtIfUnderwater),
					gravelOrStoneIfCeiling
				)
			),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.OLD_GROWTH_PINE_TAIGA, Biomes.OLD_GROWTH_SPRUCE_TAIGA),
				SurfaceRules.sequence(SurfaceRules.ifTrue(surfaceNoiseAbove(1.75), COARSE_DIRT), SurfaceRules.ifTrue(surfaceNoiseAbove(-0.95), PODZOL))
			),
			SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.ICE_SPIKES), SurfaceRules.ifTrue(aboveWater, SNOW_BLOCK)),
			SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.MANGROVE_SWAMP), MUD),
			SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.MUSHROOM_FIELDS), MYCELIUM),
			grassOrDirtIfUnderwater
		);
		SurfaceRules.ConditionSource clayBand1 = SurfaceRules.noiseCondition2d(Noises.SURFACE, -0.909, -0.5454);
		SurfaceRules.ConditionSource clayBand2 = SurfaceRules.noiseCondition2d(Noises.SURFACE, -0.1818, 0.1818);
		SurfaceRules.ConditionSource clayBand3 = SurfaceRules.noiseCondition2d(Noises.SURFACE, 0.5454, 0.909);
		SurfaceRules.RuleSource mainRuleCloseToSurface = SurfaceRules.sequence(
			SurfaceRules.ifTrue(
				SurfaceRules.ON_FLOOR,
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(
						SurfaceRules.isBiome(biomes, Biomes.WOODED_BADLANDS),
						SurfaceRules.ifTrue(
							woodedBadlandsTop,
							SurfaceRules.sequence(
								SurfaceRules.ifTrue(clayBand1, COARSE_DIRT),
								SurfaceRules.ifTrue(clayBand2, COARSE_DIRT),
								SurfaceRules.ifTrue(clayBand3, COARSE_DIRT),
								grassOrDirtIfUnderwater
							)
						)
					),
					SurfaceRules.ifTrue(
						SurfaceRules.isBiome(biomes, Biomes.SWAMP),
						SurfaceRules.ifTrue(
							swampPuddleLevel,
							SurfaceRules.ifTrue(SurfaceRules.not(aboveOverworldSeaLevel), SurfaceRules.ifTrue(SurfaceRules.noiseCondition2d(Noises.SWAMP, 0.0), WATER))
						)
					),
					SurfaceRules.ifTrue(
						SurfaceRules.isBiome(biomes, Biomes.MANGROVE_SWAMP),
						SurfaceRules.ifTrue(
							mangroveSwampPuddleLevel,
							SurfaceRules.ifTrue(SurfaceRules.not(aboveOverworldSeaLevel), SurfaceRules.ifTrue(SurfaceRules.noiseCondition2d(Noises.SWAMP, 0.0), WATER))
						)
					)
				)
			),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.BADLANDS, Biomes.ERODED_BADLANDS, Biomes.WOODED_BADLANDS),
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(
						SurfaceRules.ON_FLOOR,
						SurfaceRules.sequence(
							SurfaceRules.ifTrue(badlandsTop, ORANGE_TERRACOTTA),
							SurfaceRules.ifTrue(
								badlandsMid,
								SurfaceRules.sequence(
									SurfaceRules.ifTrue(clayBand1, TERRACOTTA),
									SurfaceRules.ifTrue(clayBand2, TERRACOTTA),
									SurfaceRules.ifTrue(clayBand3, TERRACOTTA),
									SurfaceRules.bandlands()
								)
							),
							SurfaceRules.ifTrue(notUnderwater, SurfaceRules.sequence(SurfaceRules.ifTrue(SurfaceRules.ON_CEILING, RED_SANDSTONE), RED_SAND)),
							SurfaceRules.ifTrue(SurfaceRules.not(hole), ORANGE_TERRACOTTA),
							SurfaceRules.ifTrue(notUnderDeepWater, WHITE_TERRACOTTA),
							gravelOrStoneIfCeiling
						)
					),
					SurfaceRules.ifTrue(
						badlandsHeightCondition,
						SurfaceRules.sequence(
							SurfaceRules.ifTrue(aboveOverworldSeaLevel, SurfaceRules.ifTrue(SurfaceRules.not(badlandsMid), ORANGE_TERRACOTTA)), SurfaceRules.bandlands()
						)
					),
					SurfaceRules.ifTrue(SurfaceRules.UNDER_FLOOR, SurfaceRules.ifTrue(notUnderDeepWater, WHITE_TERRACOTTA))
				)
			),
			SurfaceRules.ifTrue(
				SurfaceRules.ON_FLOOR,
				SurfaceRules.ifTrue(
					notUnderwater,
					SurfaceRules.sequence(
						SurfaceRules.ifTrue(
							frozenOcean,
							SurfaceRules.ifTrue(hole, SurfaceRules.sequence(SurfaceRules.ifTrue(aboveWater, AIR), SurfaceRules.ifTrue(SurfaceRules.temperature(), ICE), WATER))
						),
						biomeSurfaceRule
					)
				)
			),
			SurfaceRules.ifTrue(
				notUnderDeepWater,
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(SurfaceRules.ON_FLOOR, SurfaceRules.ifTrue(frozenOcean, SurfaceRules.ifTrue(hole, WATER))),
					SurfaceRules.ifTrue(SurfaceRules.UNDER_FLOOR, biomeUnderSurfaceRule),
					SurfaceRules.ifTrue(biomesWithSandAndSandstone, SurfaceRules.ifTrue(SurfaceRules.DEEP_UNDER_FLOOR, SANDSTONE)),
					SurfaceRules.ifTrue(biomesWithSandAndVeryDeepSandstone, SurfaceRules.ifTrue(SurfaceRules.VERY_DEEP_UNDER_FLOOR, SANDSTONE))
				)
			),
			SurfaceRules.ifTrue(
				SurfaceRules.ON_FLOOR,
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.FROZEN_PEAKS, Biomes.JAGGED_PEAKS), STONE),
					SurfaceRules.ifTrue(SurfaceRules.isBiome(biomes, Biomes.WARM_OCEAN, Biomes.LUKEWARM_OCEAN, Biomes.DEEP_LUKEWARM_OCEAN), sandOrSandstoneIfCeiling),
					gravelOrStoneIfCeiling
				)
			)
		);
		Builder<SurfaceRules.RuleSource> builder = ImmutableList.builder();
		if (bedrockRoof) {
			builder.add(SurfaceRules.ifTrue(SurfaceRules.not(SurfaceRules.verticalGradient("bedrock_roof", VerticalAnchor.belowTop(5), VerticalAnchor.top())), BEDROCK));
		}

		if (bedrockFloor) {
			builder.add(SurfaceRules.ifTrue(SurfaceRules.verticalGradient("bedrock_floor", VerticalAnchor.bottom(), VerticalAnchor.aboveBottom(5)), BEDROCK));
		}

		SurfaceRules.RuleSource ruleAbovePreliminarySurface = SurfaceRules.ifTrue(SurfaceRules.abovePreliminarySurface(), mainRuleCloseToSurface);
		builder.add(doPreliminarySurfaceCheck ? ruleAbovePreliminarySurface : mainRuleCloseToSurface);
		builder.add(
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.SULFUR_CAVES),
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(SurfaceRules.noiseCondition3d(Noises.SULFUR_CAVE_GRADIENT, -0.4F, -0.1F), CINNABAR),
					SurfaceRules.ifTrue(SurfaceRules.noiseCondition3d(Noises.SULFUR_CAVE_GRADIENT, 0.0, 0.4F), SULFUR),
					SurfaceRules.ifTrue(SurfaceRules.noiseCondition3d(Noises.SULFUR_CAVE_GRADIENT, 0.4F), CINNABAR)
				)
			)
		);
		builder.add(SurfaceRules.ifTrue(SurfaceRules.verticalGradient("deepslate", VerticalAnchor.absolute(0), VerticalAnchor.absolute(8)), DEEPSLATE));
		return SurfaceRules.sequence((SurfaceRules.RuleSource[])builder.build().toArray(SurfaceRules.RuleSource[]::new));
	}

	public static SurfaceRules.RuleSource nether(final HolderGetter<Biome> biomes) {
		SurfaceRules.ConditionSource aboveNetherLavaLevel = SurfaceRules.yBlockCheck(VerticalAnchor.absolute(31), 0);
		SurfaceRules.ConditionSource aboveNetherLavaSurface = SurfaceRules.yBlockCheck(VerticalAnchor.absolute(32), 0);
		SurfaceRules.ConditionSource netherBandAroundLavaLevelBottom = SurfaceRules.yStartCheck(VerticalAnchor.absolute(30), 0);
		SurfaceRules.ConditionSource netherBandAroundLavaLevelTop = SurfaceRules.not(SurfaceRules.yStartCheck(VerticalAnchor.absolute(35), 0));
		SurfaceRules.ConditionSource closeToCeiling = SurfaceRules.yBlockCheck(VerticalAnchor.belowTop(5), 0);
		SurfaceRules.ConditionSource hole = SurfaceRules.hole();
		SurfaceRules.ConditionSource soulSandLayer = SurfaceRules.noiseCondition2d(Noises.SOUL_SAND_LAYER, -0.012);
		SurfaceRules.ConditionSource gravelLayer = SurfaceRules.noiseCondition2d(Noises.GRAVEL_LAYER, -0.012);
		SurfaceRules.ConditionSource patch = SurfaceRules.noiseCondition2d(Noises.PATCH, -0.012);
		SurfaceRules.ConditionSource netherrack = SurfaceRules.noiseCondition2d(Noises.NETHERRACK, 0.54);
		SurfaceRules.ConditionSource netherWart = SurfaceRules.noiseCondition2d(Noises.NETHER_WART, 1.17);
		SurfaceRules.ConditionSource netherStateSelector = SurfaceRules.noiseCondition2d(Noises.NETHER_STATE_SELECTOR, 0.0);
		SurfaceRules.RuleSource gravelPatch = SurfaceRules.ifTrue(
			patch, SurfaceRules.ifTrue(netherBandAroundLavaLevelBottom, SurfaceRules.ifTrue(netherBandAroundLavaLevelTop, GRAVEL))
		);
		return SurfaceRules.sequence(
			SurfaceRules.ifTrue(SurfaceRules.verticalGradient("bedrock_floor", VerticalAnchor.bottom(), VerticalAnchor.aboveBottom(5)), BEDROCK),
			SurfaceRules.ifTrue(SurfaceRules.not(SurfaceRules.verticalGradient("bedrock_roof", VerticalAnchor.belowTop(5), VerticalAnchor.top())), BEDROCK),
			SurfaceRules.ifTrue(closeToCeiling, NETHERRACK),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.BASALT_DELTAS),
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(SurfaceRules.UNDER_CEILING, BASALT),
					SurfaceRules.ifTrue(SurfaceRules.UNDER_FLOOR, SurfaceRules.sequence(gravelPatch, SurfaceRules.ifTrue(netherStateSelector, BASALT), BLACKSTONE))
				)
			),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.SOUL_SAND_VALLEY),
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(SurfaceRules.UNDER_CEILING, SurfaceRules.sequence(SurfaceRules.ifTrue(netherStateSelector, SOUL_SAND), SOUL_SOIL)),
					SurfaceRules.ifTrue(SurfaceRules.UNDER_FLOOR, SurfaceRules.sequence(gravelPatch, SurfaceRules.ifTrue(netherStateSelector, SOUL_SAND), SOUL_SOIL))
				)
			),
			SurfaceRules.ifTrue(
				SurfaceRules.ON_FLOOR,
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(SurfaceRules.not(aboveNetherLavaSurface), SurfaceRules.ifTrue(hole, LAVA)),
					SurfaceRules.ifTrue(
						SurfaceRules.isBiome(biomes, Biomes.WARPED_FOREST),
						SurfaceRules.ifTrue(
							SurfaceRules.not(netherrack),
							SurfaceRules.ifTrue(aboveNetherLavaLevel, SurfaceRules.sequence(SurfaceRules.ifTrue(netherWart, WARPED_WART_BLOCK), WARPED_NYLIUM))
						)
					),
					SurfaceRules.ifTrue(
						SurfaceRules.isBiome(biomes, Biomes.CRIMSON_FOREST),
						SurfaceRules.ifTrue(
							SurfaceRules.not(netherrack),
							SurfaceRules.ifTrue(aboveNetherLavaLevel, SurfaceRules.sequence(SurfaceRules.ifTrue(netherWart, NETHER_WART_BLOCK), CRIMSON_NYLIUM))
						)
					)
				)
			),
			SurfaceRules.ifTrue(
				SurfaceRules.isBiome(biomes, Biomes.NETHER_WASTES),
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(
						SurfaceRules.UNDER_FLOOR,
						SurfaceRules.ifTrue(
							soulSandLayer,
							SurfaceRules.sequence(
								SurfaceRules.ifTrue(
									SurfaceRules.not(hole), SurfaceRules.ifTrue(netherBandAroundLavaLevelBottom, SurfaceRules.ifTrue(netherBandAroundLavaLevelTop, SOUL_SAND))
								),
								NETHERRACK
							)
						)
					),
					SurfaceRules.ifTrue(
						SurfaceRules.ON_FLOOR,
						SurfaceRules.ifTrue(
							aboveNetherLavaLevel,
							SurfaceRules.ifTrue(
								netherBandAroundLavaLevelTop,
								SurfaceRules.ifTrue(
									gravelLayer, SurfaceRules.sequence(SurfaceRules.ifTrue(aboveNetherLavaSurface, GRAVEL), SurfaceRules.ifTrue(SurfaceRules.not(hole), GRAVEL))
								)
							)
						)
					)
				)
			),
			NETHERRACK
		);
	}

	public static SurfaceRules.RuleSource end() {
		return ENDSTONE;
	}

	public static SurfaceRules.RuleSource air() {
		return AIR;
	}

	private static SurfaceRules.ConditionSource surfaceNoiseAbove(final double threshold) {
		return SurfaceRules.noiseCondition2d(Noises.SURFACE, threshold / 8.25, Double.MAX_VALUE);
	}
}