package net.minecraft.world.level.block;

import com.mojang.serialization.MapCodec;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.Direction.Axis;
import net.minecraft.util.Mth;
import net.minecraft.util.RandomSource;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.context.BlockPlaceContext;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.LevelAccessor;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.level.ScheduledTickAccess;
import net.minecraft.world.level.block.entity.BlockEntity;
import net.minecraft.world.level.block.state.BlockBehaviour;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.StateDefinition.Builder;
import net.minecraft.world.level.block.state.properties.BlockStateProperties;
import net.minecraft.world.level.block.state.properties.DoubleBlockHalf;
import net.minecraft.world.level.block.state.properties.EnumProperty;
import net.minecraft.world.level.material.Fluids;
import org.jspecify.annotations.Nullable;

public class DoublePlantBlock extends VegetationBlock {
	public static final MapCodec<DoublePlantBlock> CODEC = simpleCodec(DoublePlantBlock::new);
	public static final EnumProperty<DoubleBlockHalf> HALF = BlockStateProperties.DOUBLE_BLOCK_HALF;

	@Override
	public MapCodec<? extends DoublePlantBlock> codec() {
		return CODEC;
	}

	public DoublePlantBlock(final BlockBehaviour.Properties properties) {
		super(properties);
		this.registerDefaultState(this.stateDefinition.any().setValue(HALF, DoubleBlockHalf.LOWER));
	}

	@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
	) {
		DoubleBlockHalf half = state.getValue(HALF);
		if (directionToNeighbour.getAxis() != Axis.Y
			|| half == DoubleBlockHalf.LOWER != (directionToNeighbour == Direction.UP)
			|| neighbourState.is(this) && neighbourState.getValue(HALF) != half) {
			return half == DoubleBlockHalf.LOWER && directionToNeighbour == Direction.DOWN && !state.canSurvive(level, pos)
				? Blocks.AIR.defaultBlockState()
				: super.updateShape(state, level, ticks, pos, directionToNeighbour, neighbourPos, neighbourState, random);
		} else {
			return Blocks.AIR.defaultBlockState();
		}
	}

	@Nullable
	@Override
	public BlockState getStateForPlacement(final BlockPlaceContext context) {
		BlockPos pos = context.getClickedPos();
		Level level = context.getLevel();
		return pos.getY() < level.getMaxY() && level.getBlockState(pos.above()).canBeReplaced(context) ? super.getStateForPlacement(context) : null;
	}

	@Override
	public void setPlacedBy(final Level level, final BlockPos pos, final BlockState state, @Nullable final LivingEntity by, final ItemStack itemStack) {
		BlockPos abovePos = pos.above();
		level.setBlock(abovePos, copyWaterloggedFrom(level, abovePos, this.defaultBlockState().setValue(HALF, DoubleBlockHalf.UPPER)), 3);
	}

	@Override
	protected boolean canSurvive(final BlockState state, final LevelReader level, final BlockPos pos) {
		if (state.getValue(HALF) != DoubleBlockHalf.UPPER) {
			return super.canSurvive(state, level, pos);
		} else {
			BlockState belowState = level.getBlockState(pos.below());
			return belowState.is(this) && belowState.getValue(HALF) == DoubleBlockHalf.LOWER;
		}
	}

	public static void placeAt(final LevelAccessor level, final BlockState state, final BlockPos lowerPos, @Block.UpdateFlags final int updateType) {
		BlockPos upperPos = lowerPos.above();
		level.setBlock(lowerPos, copyWaterloggedFrom(level, lowerPos, state.setValue(HALF, DoubleBlockHalf.LOWER)), updateType);
		level.setBlock(upperPos, copyWaterloggedFrom(level, upperPos, state.setValue(HALF, DoubleBlockHalf.UPPER)), updateType);
	}

	public static BlockState copyWaterloggedFrom(final LevelReader level, final BlockPos pos, final BlockState state) {
		return state.hasProperty(BlockStateProperties.WATERLOGGED) ? state.setValue(BlockStateProperties.WATERLOGGED, level.isWaterAt(pos)) : state;
	}

	@Override
	public BlockState playerWillDestroy(final Level level, final BlockPos pos, final BlockState state, final Player player) {
		if (!level.isClientSide()) {
			if (player.preventsBlockDrops()) {
				preventDropFromBottomPart(level, pos, state, player);
			} else {
				dropResources(state, level, pos, null, player, player.getMainHandItem());
			}
		}

		return super.playerWillDestroy(level, pos, state, player);
	}

	@Override
	public void playerDestroy(
		final Level level, final Player player, final BlockPos pos, final BlockState state, @Nullable final BlockEntity blockEntity, final ItemStack destroyedWith
	) {
		super.playerDestroy(level, player, pos, Blocks.AIR.defaultBlockState(), blockEntity, destroyedWith);
	}

	protected static void preventDropFromBottomPart(final Level level, final BlockPos pos, final BlockState state, final Player player) {
		DoubleBlockHalf part = state.getValue(HALF);
		if (part == DoubleBlockHalf.UPPER) {
			BlockPos bottomPos = pos.below();
			BlockState bottomState = level.getBlockState(bottomPos);
			if (bottomState.is(state.getBlock()) && bottomState.getValue(HALF) == DoubleBlockHalf.LOWER) {
				BlockState blockState = bottomState.getFluidState().is(Fluids.WATER) ? Blocks.WATER.defaultBlockState() : Blocks.AIR.defaultBlockState();
				level.setBlock(bottomPos, blockState, 35);
				level.levelEvent(player, 2001, bottomPos, Block.getId(bottomState));
			}
		}
	}

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

	@Override
	protected long getSeed(final BlockState state, final BlockPos pos) {
		return Mth.getSeed(pos.getX(), pos.below(state.getValue(HALF) == DoubleBlockHalf.LOWER ? 0 : 1).getY(), pos.getZ());
	}
}