content: package org.allaymc.server.block.component;
  
  import org.allaymc.api.block.BlockBehavior;
  import org.allaymc.api.block.data.BlockFace;
  import org.allaymc.api.block.data.BlockTags;
  import org.allaymc.api.block.dto.Block;
  import org.allaymc.api.block.dto.PlayerInteractInfo;
  import org.allaymc.api.block.type.BlockState;
  import org.allaymc.api.block.type.BlockType;
  import org.allaymc.api.block.type.BlockTypes;
  import org.allaymc.api.entity.Entity;
  import org.allaymc.api.entity.damage.DamageContainer;
  import org.allaymc.api.entity.interfaces.EntityLiving;
  import org.allaymc.api.world.Dimension;
  import org.joml.Vector3ic;
  
  import static org.allaymc.api.block.property.type.BlockPropertyTypes.AGE_16;
  
  /**
   * @author daoge_cmd
   */
  public class BlockCactusBaseComponentImpl extends BlockBaseComponentImpl {
      public BlockCactusBaseComponentImpl(BlockType<? extends BlockBehavior> blockType) {
          super(blockType);
      }
  
      @Override
      public boolean place(Dimension dimension, BlockState blockState, Vector3ic placeBlockPos, PlayerInteractInfo placementInfo) {
          if (!canGrowHere(dimension, placeBlockPos, true)) {
              return false;
          }
  
          return dimension.setBlockState(placeBlockPos.x(), placeBlockPos.y(), placeBlockPos.z(), blockState, placementInfo);
      }
  
      @Override
      public void onCollideWithEntity(Block block, Entity entity) {
          if (entity instanceof EntityLiving living) {
              living.attack(DamageContainer.contact(0.5f));
          }
      }
  
      @Override
      public void onNeighborUpdate(Block block, Block neighbor, BlockFace face) {
          if (!canGrowHere(block.getDimension(), block.getPosition(), true)) {
              block.breakBlock();
          }
      }
  
      @Override
      public void onRandomUpdate(Block block) {
          var dimension = block.getDimension();
          var age = block.getPropertyValue(AGE_16);
          if (age < AGE_16.getMax()) {
              block = block.setPropertyValue(AGE_16, age + 1);
          } else if (age == AGE_16.getMax()) {
              block = block.setPropertyValue(AGE_16, 0);
              if (canGrowHere(dimension, block.getPosition(), false)) {
                  for (var y = 1; y < 3; y++) {
                      var upperBlock = block.offsetPos(0, y, 0);
                      var blockType = upperBlock.getBlockType();
                      if (blockType == BlockTypes.AIR) {
                          dimension.setBlockState(upperBlock.getPosition(), BlockTypes.CACTUS.getDefaultState());
                          break;
                      } else if (blockType != BlockTypes.CACTUS) {
                          break;
                      }
                  }
              }
          }
  
          dimension.setBlockState(block.getPosition(), block.getBlockState());
      }
  
      /**
       * Check if cactus can live/grow here.
       *
       * @param dimension the dimension that the cactus is in
       * @param pos       the pos of the cactus
       * @param recursive whether to check the block below recursively
       * @return {@code true} if cactus can live/grow here, {@code false} otherwise
       */
      protected boolean canGrowHere(Dimension dimension, Vector3ic pos, boolean recursive) {
          for (var face : BlockFace.getHorizontalBlockFaces()) {
              if (dimension.getBlockState(face.offsetPos(pos)).getBlockType() != BlockTypes.AIR) {
                  return false;
              }
          }
  
          var downBlockType = dimension.getBlockState(BlockFace.DOWN.offsetPos(pos)).getBlockType();
          if (recursive && downBlockType == BlockTypes.CACTUS) {
              return canGrowHere(dimension, BlockFace.DOWN.offsetPos(pos), true);
          }
  
          return downBlockType.hasBlockTag(BlockTags.SAND);
      }
  
      @Override
      public boolean canRandomUpdate() {
          return true;
      }
  }
  