package org.bukkit.craftbukkit;

import org.bukkit.ChunkSnapshot;
import org.bukkit.block.Biome;
import org.bukkit.craftbukkit.block.CraftBlock;


/**
 * Represents a static, thread-safe snapshot of chunk of blocks
 * Purpose is to allow clean, efficient copy of a chunk data to be made, and then handed off for processing in another thread (e.g. map rendering)
 */
public class CraftChunkSnapshot implements ChunkSnapshot
{
	private final int x, z;
	private final String worldname;
	private final short[][] blockids; /* Block IDs, by section */
	private final byte[][] blockdata;
	private final byte[][] skylight;
	private final byte[][] emitlight;
	private final boolean[] empty;
	private final int[] hmap; // Height map
	private final long captureFulltime;
	private final net.minecraft.world.biome.BiomeGenBase[] biome;
	private final double[] biomeTemp;
	private final double[] biomeRain;

	CraftChunkSnapshot(int x, int z, String wname, long wtime, short[][] sectionBlockIDs, byte[][] sectionBlockData, byte[][] sectionSkyLights, byte[][] sectionEmitLights, boolean[] sectionEmpty, int[] hmap, net.minecraft.world.biome.BiomeGenBase[] biome, double[] biomeTemp, double[] biomeRain)
	{
		this.x = x;
		this.z = z;
		this.worldname = wname;
		this.captureFulltime = wtime;
		this.blockids = sectionBlockIDs;
		this.blockdata = sectionBlockData;
		this.skylight = sectionSkyLights;
		this.emitlight = sectionEmitLights;
		this.empty = sectionEmpty;
		this.hmap = hmap;
		this.biome = biome;
		this.biomeTemp = biomeTemp;
		this.biomeRain = biomeRain;
	}

	public int getX()
	{
		return x;
	}

	public int getZ()
	{
		return z;
	}

	public String getWorldName()
	{
		return worldname;
	}

	public final int getBlockTypeId(int x, int y, int z)
	{
		return blockids[y >> 4][((y & 0xF) << 8) | (z << 4) | x];
	}

	public final int getBlockData(int x, int y, int z)
	{
		int off = ((y & 0xF) << 7) | (z << 3) | (x >> 1);
		return (blockdata[y >> 4][off] >> ((x & 1) << 2)) & 0xF;
	}

	public final int getBlockSkyLight(int x, int y, int z)
	{
		int off = ((y & 0xF) << 7) | (z << 3) | (x >> 1);
		return (skylight[y >> 4][off] >> ((x & 1) << 2)) & 0xF;
	}

	public final int getBlockEmittedLight(int x, int y, int z)
	{
		int off = ((y & 0xF) << 7) | (z << 3) | (x >> 1);
		return (emitlight[y >> 4][off] >> ((x & 1) << 2)) & 0xF;
	}

	public final int getHighestBlockYAt(int x, int z)
	{
		return hmap[z << 4 | x];
	}

	public final Biome getBiome(int x, int z)
	{
		return CraftBlock.biomeBaseToBiome(biome[z << 4 | x]);
	}

	public final double getRawBiomeTemperature(int x, int z)
	{
		return biomeTemp[z << 4 | x];
	}

	public final double getRawBiomeRainfall(int x, int z)
	{
		return biomeRain[z << 4 | x];
	}

	public final long getCaptureFullTime()
	{
		return captureFulltime;
	}

	public final boolean isSectionEmpty(int sy)
	{
		return empty[sy];
	}
}