package com.seibel.lod.objects;

import com.seibel.lod.util.*;

import javax.xml.crypto.Data;
import java.util.Arrays;

public class SingleLevelContainer implements LevelContainer
{
	public final byte detailLevel;
	public final int size;

	public final long[][] dataContainer;

	public SingleLevelContainer(byte detailLevel)
	{
		this.detailLevel = detailLevel;
		size = 1 << (LodUtil.REGION_DETAIL_LEVEL - detailLevel);
		dataContainer = new long[size][size];
	}

	public void clear(int posX, int posZ)
	{
		posX = LevelPosUtil.getRegionModule(detailLevel, posX);
		posZ = LevelPosUtil.getRegionModule(detailLevel, posZ);
		dataContainer[posX][posZ] = DataPointUtil.EMPTY_DATA;
	}

	public boolean addData(long data, int posX, int posZ, int index)
	{
		posX = LevelPosUtil.getRegionModule(detailLevel, posX);
		posZ = LevelPosUtil.getRegionModule(detailLevel, posZ);
		dataContainer[posX][posZ] = data;
		return true;
	}

	public boolean addSingleData(long newData, int posX, int posZ)
	{
		posX = LevelPosUtil.getRegionModule(detailLevel, posX);
		posZ = LevelPosUtil.getRegionModule(detailLevel, posZ);
		dataContainer[posX][posZ] = newData;
		return true;
	}

	public long getData(int posX, int posZ, int index)
	{
		posX = LevelPosUtil.getRegionModule(detailLevel, posX);
		posZ = LevelPosUtil.getRegionModule(detailLevel, posZ);
		//Improve this using a thread map to long[]
		return dataContainer[posX][posZ];
	}

	public long getSingleData(int posX, int posZ)
	{
		posX = LevelPosUtil.getRegionModule(detailLevel, posX);
		posZ = LevelPosUtil.getRegionModule(detailLevel, posZ);
		//Improve this using a thread map to long[]
		return dataContainer[posX][posZ];
	}

	public byte getDetailLevel()
	{
		return detailLevel;
	}

	public LevelContainer expand()
	{
		return new SingleLevelContainer((byte) (getDetailLevel() - 1));
	}

	public SingleLevelContainer(byte[] inputData)
	{
		int tempIndex;
		int index = 0;
		long newData;
		detailLevel = inputData[index];
		index++;
		size = (int) Math.pow(2, LodUtil.REGION_DETAIL_LEVEL - detailLevel);
		this.dataContainer = new long[size][size];
		for (int x = 0; x < size; x++)
		{
			for (int z = 0; z < size; z++)
			{
				newData = 0;
				if (inputData[index] == 0)
					index++;
				else if (index + 7 >= inputData.length)
					break;
				else
				{
					for (tempIndex = 0; tempIndex < 8; tempIndex++)
						newData += (((long) inputData[index + tempIndex]) & 0xff) << (8 * tempIndex);
					index = index + 8;
				}
				dataContainer[x][z] = newData;

			}
		}
	}

	public void updateData(LevelContainer lowerLevelContainer, int posX, int posZ)
	{
		//We reset the array
		long[] dataToMerge = ThreadMapUtil.getSingleUpdateArray();

		int childPosX;
		int childPosZ;
		long data;
		posX = LevelPosUtil.getRegionModule(detailLevel, posX);
		posZ = LevelPosUtil.getRegionModule(detailLevel, posZ);
		for (int x = 0; x <= 1; x++)
		{
			for (int z = 0; z <= 1; z++)
			{
				childPosX = 2 * posX + x;
				childPosZ = 2 * posZ + z;
				dataToMerge[2 * x + z] = ((SingleLevelContainer) lowerLevelContainer).getSingleData(childPosX, childPosZ);
			}
		}
		data = DataPointUtil.mergeSingleData(dataToMerge);
		addSingleData(data, posX, posZ);
	}

	public int getMaxVerticalData(){
		return 1;
	}

	public boolean doesItExist(int posX, int posZ)
	{
		posX = LevelPosUtil.getRegionModule(detailLevel, posX);
		posZ = LevelPosUtil.getRegionModule(detailLevel, posZ);
		//Improve this using a thread map to long[]
		return DataPointUtil.doesItExist(getSingleData(posX, posZ));
	}

	public byte[] toDataString()
	{
		int index = 0;
		int tempIndex;
		byte[] tempData = new byte[1 + (size * size * 8)];
		tempData[index] = detailLevel;
		index++;
		for (int x = 0; x < size; x++)
		{
			for (int z = 0; z < size; z++)
			{
				if (dataContainer[x][z] == 0)
				{
					tempData[index] = 0;
					index++;
				} else
				{
					for (tempIndex = 0; tempIndex < 8; tempIndex++)
						tempData[index + tempIndex] = (byte) (dataContainer[x][z] >>> (8 * tempIndex));
					index += 8;
				}
			}
		}
		return Arrays.copyOfRange(tempData, 0, index);
	}

	@Override
	public String toString()
	{
		StringBuilder stringBuilder = new StringBuilder();
		stringBuilder.append(detailLevel);
		return stringBuilder.toString();
	}
}