package net.minecraft.world.level.levelgen.structure.pieces;

import com.google.common.collect.Lists;
import java.util.List;
import net.minecraft.util.RandomSource;
import net.minecraft.world.level.levelgen.structure.BoundingBox;
import net.minecraft.world.level.levelgen.structure.StructurePiece;
import net.minecraft.world.level.levelgen.structure.StructurePieceAccessor;
import org.jetbrains.annotations.Nullable;

public class StructurePiecesBuilder implements StructurePieceAccessor {
	private final List<StructurePiece> pieces = Lists.<StructurePiece>newArrayList();

	@Override
	public void addPiece(StructurePiece piece) {
		this.pieces.add(piece);
	}

	@Nullable
	@Override
	public StructurePiece findCollisionPiece(BoundingBox box) {
		return StructurePiece.findCollisionPiece(this.pieces, box);
	}

	@Deprecated
	public void offsetPiecesVertically(int offset) {
		for (StructurePiece structurePiece : this.pieces) {
			structurePiece.move(0, offset, 0);
		}
	}

	@Deprecated
	public int moveBelowSeaLevel(int seaLevel, int minY, RandomSource random, int amount) {
		int i = seaLevel - amount;
		BoundingBox boundingBox = this.getBoundingBox();
		int j = boundingBox.getYSpan() + minY + 1;
		if (j < i) {
			j += random.nextInt(i - j);
		}

		int k = j - boundingBox.maxY();
		this.offsetPiecesVertically(k);
		return k;
	}

	/** @deprecated */
	public void moveInsideHeights(RandomSource random, int minY, int maxY) {
		BoundingBox boundingBox = this.getBoundingBox();
		int i = maxY - minY + 1 - boundingBox.getYSpan();
		int j;
		if (i > 1) {
			j = minY + random.nextInt(i);
		} else {
			j = minY;
		}

		int k = j - boundingBox.minY();
		this.offsetPiecesVertically(k);
	}

	public PiecesContainer build() {
		return new PiecesContainer(this.pieces);
	}

	public void clear() {
		this.pieces.clear();
	}

	public boolean isEmpty() {
		return this.pieces.isEmpty();
	}

	public BoundingBox getBoundingBox() {
		return StructurePiece.createBoundingBox(this.pieces.stream());
	}
}