/FileExtraction/Java_unseen/Wind-Development_WindSpigot/WindSpigot-Server/src/main/java/org/bukkit/craftbukkit/generator/CraftChunkData.java
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package org.bukkit.craftbukkit.generator;

import java.util.Arrays;

import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.generator.ChunkGenerator;
import org.bukkit.material.MaterialData;

/**
 * Data to be used for the block types and data in a newly generated chunk.
 */
public final class CraftChunkData implements ChunkGenerator.ChunkData {
	private final int maxHeight;
	private final char[][] sections;

	public CraftChunkData(World world) {
		this(world.getMaxHeight());
	}

	/* pp for tests */ CraftChunkData(int maxHeight) {
		if (maxHeight > 256) {
			throw new IllegalArgumentException("World height exceeded max chunk height");
		}
		this.maxHeight = maxHeight;
		// Minecraft hardcodes this to 16 chunk sections.
		sections = new char[16][];
	}

	@Override
	public int getMaxHeight() {
		return maxHeight;
	}

	@Override
	public void setBlock(int x, int y, int z, Material material) {
		setBlock(x, y, z, material.getId());
	}

	@Override
	public void setBlock(int x, int y, int z, MaterialData material) {
		setBlock(x, y, z, material.getItemTypeId(), material.getData());
	}

	@Override
	public void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, Material material) {
		setRegion(xMin, yMin, zMin, xMax, yMax, zMax, material.getId());
	}

	@Override
	public void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, MaterialData material) {
		setRegion(xMin, yMin, zMin, xMax, yMax, zMax, material.getItemTypeId(), material.getData());
	}

	@Override
	public Material getType(int x, int y, int z) {
		return Material.getMaterial(getTypeId(x, y, z));
	}

	@Override
	public MaterialData getTypeAndData(int x, int y, int z) {
		return getType(x, y, z).getNewData(getData(x, y, z));
	}

	@Override
	public void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, int blockId) {
		setRegion(xMin, yMin, zMin, xMax, yMax, zMax, blockId, (byte) 0);
	}

	@Override
	public void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, int blockId, int data) {
		// Clamp to sane values.
		if (xMin > 0xf || yMin >= maxHeight || zMin > 0xf) {
			return;
		}
		if (xMin < 0) {
			xMin = 0;
		}
		if (yMin < 0) {
			yMin = 0;
		}
		if (zMin < 0) {
			zMin = 0;
		}
		if (xMax > 0x10) {
			xMax = 0x10;
		}
		if (yMax > maxHeight) {
			yMax = maxHeight;
		}
		if (zMax > 0x10) {
			zMax = 0x10;
		}
		if (xMin >= xMax || yMin >= yMax || zMin >= zMax) {
			return;
		}
		char typeChar = (char) ((blockId << 4) | data);
		if (xMin == 0 && xMax == 0x10) {
			if (zMin == 0 && zMax == 0x10) {
				for (int y = yMin & 0xf0; y < yMax; y += 0x10) {
					char[] section = getChunkSection(y, true);
					if (y <= yMin) {
						if (y + 0x10 > yMax) {
							// First and last chunk section
							Arrays.fill(section, (yMin & 0xf) << 8, (yMax & 0xf) << 8, typeChar);
						} else {
							// First chunk section
							Arrays.fill(section, (yMin & 0xf) << 8, 0x1000, typeChar);
						}
					} else if (y + 0x10 > yMax) {
						// Last chunk section
						Arrays.fill(section, 0, (yMax & 0xf) << 8, typeChar);
					} else {
						// Full chunk section
						Arrays.fill(section, 0, 0x1000, typeChar);
					}
				}
			} else {
				for (int y = yMin; y < yMax; y++) {
					char[] section = getChunkSection(y, true);
					int offsetBase = (y & 0xf) << 8;
					int min = offsetBase | (zMin << 4);
					// Need to add zMax as it can be 16, which overlaps the y coordinate bits
					int max = offsetBase + (zMax << 4);
					Arrays.fill(section, min, max, typeChar);
				}
			}
		} else {
			for (int y = yMin; y < yMax; y++) {
				char[] section = getChunkSection(y, true);
				int offsetBase = (y & 0xf) << 8;
				for (int z = zMin; z < zMax; z++) {
					int offset = offsetBase | (z << 4);
					// Need to add xMax as it can be 16, which overlaps the z coordinate bits
					Arrays.fill(section, offset | xMin, offset + xMax, typeChar);
				}
			}
		}
	}

	@Override
	public void setBlock(int x, int y, int z, int blockId) {
		setBlock(x, y, z, blockId, (byte) 0);
	}

	@Override
	public void setBlock(int x, int y, int z, int blockId, byte data) {
		setBlock(x, y, z, (char) (blockId << 4 | data));
	}

	@Override
	public int getTypeId(int x, int y, int z) {
		if (x != (x & 0xf) || y < 0 || y >= maxHeight || z != (z & 0xf)) {
			return 0;
		}
		char[] section = getChunkSection(y, false);
		if (section == null) {
			return 0;
		} else {
			return section[(y & 0xf) << 8 | z << 4 | x] >> 4;
		}
	}

	@Override
	public byte getData(int x, int y, int z) {
		if (x != (x & 0xf) || y < 0 || y >= maxHeight || z != (z & 0xf)) {
			return (byte) 0;
		}
		char[] section = getChunkSection(y, false);
		if (section == null) {
			return (byte) 0;
		} else {
			return (byte) (section[(y & 0xf) << 8 | z << 4 | x] & 0xf);
		}
	}

	private void setBlock(int x, int y, int z, char type) {
		if (x != (x & 0xf) || y < 0 || y >= maxHeight || z != (z & 0xf)) {
			return;
		}
		char[] section = getChunkSection(y, true);
		section[(y & 0xf) << 8 | z << 4 | x] = type;
	}

	private char[] getChunkSection(int y, boolean create) {
		char[] section = sections[y >> 4];
		if (create && section == null) {
			sections[y >> 4] = section = new char[0x1000];
		}
		return section;
	}

	char[][] getRawChunkData() {
		return sections;
	}
}
