package net.minecraft.world.item;

import java.util.Map;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.world.item.context.BlockPlaceContext;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.phys.shapes.CollisionContext;
import org.jspecify.annotations.Nullable;

public class StandingAndWallBlockItem extends BlockItem {
	protected final Block wallBlock;
	private final Direction attachmentDirection;

	public StandingAndWallBlockItem(final Block block, final Block wallBlock, final Direction attachmentDirection, final Item.Properties properties) {
		super(block, properties);
		this.wallBlock = wallBlock;
		this.attachmentDirection = attachmentDirection;
	}

	protected boolean canPlace(final LevelReader level, final BlockState possibleState, final BlockPos pos) {
		return possibleState.canSurvive(level, pos);
	}

	@Nullable
	@Override
	protected BlockState getPlacementState(final BlockPlaceContext context) {
		BlockState wallState = this.wallBlock.getStateForPlacement(context);
		BlockState stateForPlacement = null;
		LevelReader level = context.getLevel();
		BlockPos pos = context.getClickedPos();

		for (Direction direction : context.getNearestLookingDirections()) {
			if (direction != this.attachmentDirection.getOpposite()) {
				BlockState possibleState = direction == this.attachmentDirection ? this.getBlock().getStateForPlacement(context) : wallState;
				if (possibleState != null && this.canPlace(level, possibleState, pos)) {
					stateForPlacement = possibleState;
					break;
				}
			}
		}

		return stateForPlacement != null && level.isUnobstructed(stateForPlacement, pos, CollisionContext.empty()) ? stateForPlacement : null;
	}

	@Override
	public void registerBlocks(final Map<Block, Item> map, final Item item) {
		super.registerBlocks(map, item);
		map.put(this.wallBlock, item);
	}
}