package net.minecraft.world.level.block;

import com.mojang.serialization.MapCodec;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.tags.BlockTags;
import net.minecraft.util.RandomSource;
import net.minecraft.world.item.context.BlockPlaceContext;
import net.minecraft.world.level.BlockGetter;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.level.LightLayer;
import net.minecraft.world.level.ScheduledTickAccess;
import net.minecraft.world.level.block.state.BlockBehaviour;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.StateDefinition;
import net.minecraft.world.level.block.state.properties.BlockStateProperties;
import net.minecraft.world.level.block.state.properties.IntegerProperty;
import net.minecraft.world.level.pathfinder.PathComputationType;
import net.minecraft.world.phys.shapes.CollisionContext;
import net.minecraft.world.phys.shapes.VoxelShape;
import org.jspecify.annotations.Nullable;

/**
 * Access widened by fabric-transitive-access-wideners-v1 to accessible
 */
public class SnowLayerBlock extends Block {
	public static final MapCodec<SnowLayerBlock> CODEC = simpleCodec(SnowLayerBlock::new);
	public static final int MAX_HEIGHT = 8;
	public static final IntegerProperty LAYERS = BlockStateProperties.LAYERS;
	private static final VoxelShape[] SHAPES = Block.boxes(8, height -> Block.column(16.0, 0.0, height * 2));
	public static final int HEIGHT_IMPASSABLE = 5;

	@Override
	public MapCodec<SnowLayerBlock> codec() {
		return CODEC;
	}

	/**
	 * Access widened by fabric-transitive-access-wideners-v1 to accessible
	 */
	public SnowLayerBlock(final BlockBehaviour.Properties properties) {
		super(properties);
		this.registerDefaultState(this.stateDefinition.any().setValue(LAYERS, 1));
	}

	@Override
	protected boolean isPathfindable(final BlockState state, final PathComputationType type) {
		return type == PathComputationType.LAND ? (Integer)state.getValue(LAYERS) < 5 : false;
	}

	@Override
	protected VoxelShape getShape(final BlockState state, final BlockGetter level, final BlockPos pos, final CollisionContext context) {
		return SHAPES[state.getValue(LAYERS)];
	}

	@Override
	protected VoxelShape getCollisionShape(final BlockState state, final BlockGetter level, final BlockPos pos, final CollisionContext context) {
		return SHAPES[state.getValue(LAYERS) - 1];
	}

	@Override
	protected VoxelShape getBlockSupportShape(final BlockState state, final BlockGetter level, final BlockPos pos) {
		return SHAPES[state.getValue(LAYERS)];
	}

	@Override
	protected VoxelShape getVisualShape(final BlockState state, final BlockGetter level, final BlockPos pos, final CollisionContext context) {
		return SHAPES[state.getValue(LAYERS)];
	}

	@Override
	protected boolean useShapeForLightOcclusion(final BlockState state) {
		return true;
	}

	@Override
	protected float getShadeBrightness(final BlockState state, final BlockGetter level, final BlockPos pos) {
		return state.getValue(LAYERS) == 8 ? 0.2F : 1.0F;
	}

	@Override
	protected boolean canSurvive(final BlockState state, final LevelReader level, final BlockPos pos) {
		BlockState belowState = level.getBlockState(pos.below());
		if (belowState.is(BlockTags.CANNOT_SUPPORT_SNOW_LAYER)) {
			return false;
		} else {
			return belowState.is(BlockTags.SUPPORT_OVERRIDE_SNOW_LAYER)
				? true
				: Block.isFaceFull(belowState.getCollisionShape(level, pos.below()), Direction.UP) || belowState.is(this) && (Integer)belowState.getValue(LAYERS) == 8;
		}
	}

	@Override
	protected BlockState updateShape(
		final BlockState state,
		final LevelReader level,
		final ScheduledTickAccess ticks,
		final BlockPos pos,
		final Direction directionToNeighbour,
		final BlockPos neighbourPos,
		final BlockState neighbourState,
		final RandomSource random
	) {
		return !state.canSurvive(level, pos)
			? Blocks.AIR.defaultBlockState()
			: super.updateShape(state, level, ticks, pos, directionToNeighbour, neighbourPos, neighbourState, random);
	}

	@Override
	protected void randomTick(final BlockState state, final ServerLevel level, final BlockPos pos, final RandomSource random) {
		if (level.getBrightness(LightLayer.BLOCK, pos) > 11) {
			dropResources(state, level, pos);
			level.removeBlock(pos, false);
		}
	}

	@Override
	protected boolean canBeReplaced(final BlockState state, final BlockPlaceContext context) {
		int layers = (Integer)state.getValue(LAYERS);
		if (!context.getItemInHand().is(this.asItem()) || layers >= 8) {
			return layers == 1;
		} else {
			return context.replacingClickedOnBlock() ? context.getClickedFace() == Direction.UP : true;
		}
	}

	@Nullable
	@Override
	public BlockState getStateForPlacement(final BlockPlaceContext context) {
		BlockState state = context.getLevel().getBlockState(context.getClickedPos());
		if (state.is(this)) {
			int layers = (Integer)state.getValue(LAYERS);
			return state.setValue(LAYERS, Math.min(8, layers + 1));
		} else {
			return super.getStateForPlacement(context);
		}
	}

	@Override
	protected void createBlockStateDefinition(final StateDefinition.Builder<Block, BlockState> builder) {
		builder.add(LAYERS);
	}
}