package net.minecraft.world.level.levelgen.feature.rootplacers;

import com.mojang.datafixers.Products.P3;
import com.mojang.serialization.Codec;
import com.mojang.serialization.codecs.RecordCodecBuilder.Instance;
import com.mojang.serialization.codecs.RecordCodecBuilder.Mu;
import java.util.Optional;
import java.util.function.BiConsumer;
import net.minecraft.core.BlockPos;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.tags.FluidTags;
import net.minecraft.util.RandomSource;
import net.minecraft.util.valueproviders.IntProvider;
import net.minecraft.world.level.LevelSimulatedReader;
import net.minecraft.world.level.block.state.BlockBehaviour;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.properties.BlockStateProperties;
import net.minecraft.world.level.levelgen.feature.TreeFeature;
import net.minecraft.world.level.levelgen.feature.configurations.TreeConfiguration;
import net.minecraft.world.level.levelgen.feature.stateproviders.BlockStateProvider;

public abstract class RootPlacer {
	public static final Codec<RootPlacer> CODEC = BuiltInRegistries.ROOT_PLACER_TYPE.byNameCodec().dispatch(RootPlacer::type, RootPlacerType::codec);
	protected final IntProvider trunkOffsetY;
	protected final BlockStateProvider rootProvider;
	protected final Optional<AboveRootPlacement> aboveRootPlacement;

	protected static <P extends RootPlacer> P3<Mu<P>, IntProvider, BlockStateProvider, Optional<AboveRootPlacement>> rootPlacerParts(Instance<P> instance) {
		return instance.group(
			IntProvider.CODEC.fieldOf("trunk_offset_y").forGetter(rootPlacer -> rootPlacer.trunkOffsetY),
			BlockStateProvider.CODEC.fieldOf("root_provider").forGetter(rootPlacer -> rootPlacer.rootProvider),
			AboveRootPlacement.CODEC.optionalFieldOf("above_root_placement").forGetter(rootPlacer -> rootPlacer.aboveRootPlacement)
		);
	}

	public RootPlacer(IntProvider trunkOffset, BlockStateProvider rootProvider, Optional<AboveRootPlacement> aboveRootPlacement) {
		this.trunkOffsetY = trunkOffset;
		this.rootProvider = rootProvider;
		this.aboveRootPlacement = aboveRootPlacement;
	}

	protected abstract RootPlacerType<?> type();

	public abstract boolean placeRoots(
		LevelSimulatedReader level,
		BiConsumer<BlockPos, BlockState> blockSetter,
		RandomSource random,
		BlockPos pos,
		BlockPos trunkOrigin,
		TreeConfiguration treeConfig
	);

	protected boolean canPlaceRoot(LevelSimulatedReader level, BlockPos pos) {
		return TreeFeature.validTreePos(level, pos);
	}

	protected void placeRoot(
		LevelSimulatedReader level, BiConsumer<BlockPos, BlockState> blockSetter, RandomSource random, BlockPos pos, TreeConfiguration treeConfig
	) {
		if (this.canPlaceRoot(level, pos)) {
			blockSetter.accept(pos, this.getPotentiallyWaterloggedState(level, pos, this.rootProvider.getState(random, pos)));
			if (this.aboveRootPlacement.isPresent()) {
				AboveRootPlacement aboveRootPlacement = (AboveRootPlacement)this.aboveRootPlacement.get();
				BlockPos blockPos = pos.above();
				if (random.nextFloat() < aboveRootPlacement.aboveRootPlacementChance() && level.isStateAtPosition(blockPos, BlockBehaviour.BlockStateBase::isAir)) {
					blockSetter.accept(blockPos, this.getPotentiallyWaterloggedState(level, blockPos, aboveRootPlacement.aboveRootProvider().getState(random, blockPos)));
				}
			}
		}
	}

	protected BlockState getPotentiallyWaterloggedState(LevelSimulatedReader level, BlockPos pos, BlockState state) {
		if (state.hasProperty(BlockStateProperties.WATERLOGGED)) {
			boolean bl = level.isFluidAtPosition(pos, fluidState -> fluidState.is(FluidTags.WATER));
			return state.setValue(BlockStateProperties.WATERLOGGED, bl);
		} else {
			return state;
		}
	}

	public BlockPos getTrunkOrigin(BlockPos pos, RandomSource random) {
		return pos.above(this.trunkOffsetY.sample(random));
	}
}