BCLib/src/main/java/ru/bclib/blocks/DoublePlantBlock.java

package ru.bclib.blocks;

import java.util.List;
import java.util.Random;

import com.google.common.collect.Lists;

import net.fabricmc.fabric.api.object.builder.v1.block.FabricBlockSettings;
import net.fabricmc.fabric.api.tool.attribute.v1.FabricToolTags;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.item.ItemEntity;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.enchantment.EnchantmentHelper;
import net.minecraft.world.item.enchantment.Enchantments;
import net.minecraft.world.level.BlockGetter;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.LevelAccessor;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.level.block.BonemealableBlock;
import net.minecraft.world.level.block.SoundType;
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.BooleanProperty;
import net.minecraft.world.level.block.state.properties.IntegerProperty;
import net.minecraft.world.level.material.Material;
import net.minecraft.world.level.storage.loot.LootContext;
import net.minecraft.world.level.storage.loot.parameters.LootContextParams;
import net.minecraft.world.phys.Vec3;
import net.minecraft.world.phys.shapes.CollisionContext;
import net.minecraft.world.phys.shapes.VoxelShape;
import ru.bclib.client.render.ERenderLayer;
import ru.bclib.interfaces.IRenderTypeable;
import ru.bclib.util.BlocksHelper;

public abstract class DoublePlantBlock extends BaseBlockNotFull implements IRenderTypeable, BonemealableBlock {
	private static final VoxelShape SHAPE = Block.box(4, 2, 4, 12, 16, 12);
	public static final IntegerProperty ROTATION = BlockProperties.ROTATION;
	public static final BooleanProperty TOP = BooleanProperty.create("top");
	
	public DoublePlantBlock() {
		super(FabricBlockSettings.of(Material.PLANT)
				.breakByTool(FabricToolTags.SHEARS)
				.breakByHand(true)
				.sound(SoundType.WET_GRASS)
				.noCollission());
		this.registerDefaultState(this.stateDefinition.any().setValue(TOP, false));
	}
	
	public DoublePlantBlock(int light) {
		super(FabricBlockSettings.of(Material.PLANT)
				.breakByTool(FabricToolTags.SHEARS)
				.breakByHand(true)
				.sound(SoundType.WET_GRASS)
				.lightLevel((state) -> state.getValue(TOP) ? light : 0)
				.noCollission());
		this.registerDefaultState(this.stateDefinition.any().setValue(TOP, false));
	}
	
	@Override
	protected void createBlockStateDefinition(StateDefinition.Builder<Block, BlockState> stateManager) {
		stateManager.add(TOP, ROTATION);
	}

	@Override
	public VoxelShape getShape(BlockState state, BlockGetter view, BlockPos pos, CollisionContext ePos) {
		Vec3 vec3d = state.getOffset(view, pos);
		return SHAPE.move(vec3d.x, vec3d.y, vec3d.z);
	}

	@Override
	public BlockBehaviour.OffsetType getOffsetType() {
		return BlockBehaviour.OffsetType.XZ;
	}

	@Override
	public boolean canSurvive(BlockState state, LevelReader world, BlockPos pos) {
		BlockState down = world.getBlockState(pos.below());
		BlockState up = world.getBlockState(pos.above());
		return state.getValue(TOP) ? down.getBlock() == this : isTerrain(down) && (up.getMaterial().isReplaceable());
	}
	
	public boolean canStayAt(BlockState state, LevelReader world, BlockPos pos) {
		BlockState down = world.getBlockState(pos.below());
		BlockState up = world.getBlockState(pos.above());
		return state.getValue(TOP) ? down.getBlock() == this : isTerrain(down) && (up.getBlock() == this);
	}

	protected abstract boolean isTerrain(BlockState state);
	
	@Override
	public BlockState updateShape(BlockState state, Direction facing, BlockState neighborState, LevelAccessor world, BlockPos pos, BlockPos neighborPos) {
		if (!canStayAt(state, world, pos)) {
			return Blocks.AIR.defaultBlockState();
		}
		else {
			return state;
		}
	}
	
	@Override
	public List<ItemStack> getDrops(BlockState state, LootContext.Builder builder) {
		if (state.getValue(TOP)) {
			return Lists.newArrayList();
		}
		
		ItemStack tool = builder.getParameter(LootContextParams.TOOL);
		if (tool != null && tool.getItem().is(FabricToolTags.SHEARS) || EnchantmentHelper.getItemEnchantmentLevel(Enchantments.SILK_TOUCH, tool) > 0) {
			return Lists.newArrayList(new ItemStack(this));
		}
		else {
			return Lists.newArrayList();
		}
	}
	
	@Override
	public ERenderLayer getRenderLayer() {
		return ERenderLayer.CUTOUT;
	}

	@Override
	public boolean isValidBonemealTarget(BlockGetter world, BlockPos pos, BlockState state, boolean isClient) {
		return true;
	}

	@Override
	public boolean isBonemealSuccess(Level world, Random random, BlockPos pos, BlockState state) {
		return true;
	}

	@Override
	public void performBonemeal(ServerLevel world, Random random, BlockPos pos, BlockState state) {
		ItemEntity item = new ItemEntity(world, pos.getX() + 0.5, pos.getY() + 0.5, pos.getZ() + 0.5, new ItemStack(this));
		world.addFreshEntity(item);
	}
	
	@Override
	public void setPlacedBy(Level world, BlockPos pos, BlockState state, LivingEntity placer, ItemStack itemStack) {
		int rot = world.random.nextInt(4);
		BlockState bs = this.defaultBlockState().setValue(ROTATION, rot);
		BlocksHelper.setWithoutUpdate(world, pos, bs);
		BlocksHelper.setWithoutUpdate(world, pos.above(), bs.setValue(TOP, true));
	}
}