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package makamys.lodmod.renderer;
import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Path;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import makamys.lodmod.LODMod;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.texture.TextureMap;
import net.minecraft.entity.Entity;
import net.minecraft.nbt.CompressedStreamTools;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.world.chunk.Chunk;
import net.minecraftforge.common.util.Constants.NBT;
public class LODRegion {
private LODChunk[][] data = new LODChunk[32][32];
int regionX, regionZ;
public LODRegion(int regionX, int regionZ) {
this.regionX = regionX;
this.regionZ = regionZ;
for(int i = 0; i < 32; i++) {
for(int j = 0; j < 32; j++) {
data[i][j] = new LODChunk(regionX * 32 + i, regionZ * 32 + j);
}
}
}
public LODRegion(int regionX, int regionZ, NBTTagCompound nbt) {
this.regionX = regionX;
this.regionZ = regionZ;
NBTTagList list = nbt.getTagList("chunks", NBT.TAG_COMPOUND);
List<String> stringTable = Arrays.asList(nbt.getString("stringTable").split("\\n"));
int idx = 0;
for(int i = 0; i < 32; i++) {
for(int j = 0; j < 32; j++) {
data[i][j] = new LODChunk(list.getCompoundTagAt(idx++), stringTable);
if(data[i][j].hasChunkMeshes()) {
LODMod.renderer.setVisible(data[i][j], true);
}
}
}
}
public static LODRegion load(Path saveDir, int regionX, int regionZ) {
if(!LODMod.disableChunkMeshes && LODMod.saveMeshes) {
File saveFile = getSavePath(saveDir, regionX, regionZ).toFile();
if(saveFile.exists()) {
try {
NBTTagCompound nbt = CompressedStreamTools.readCompressed(new FileInputStream(saveFile));
return new LODRegion(regionX, regionZ, nbt);
} catch (Exception e) {
e.printStackTrace();
}
}
}
return new LODRegion(regionX, regionZ);
}
private static Path getSavePath(Path saveDir, int regionX, int regionZ) {
return saveDir.resolve("lod").resolve(regionX + "," + regionZ + ".lod");
}
public void save(Path saveDir) {
if(LODMod.disableChunkMeshes && LODMod.saveMeshes) return;
try {
File saveFile = getSavePath(saveDir, regionX, regionZ).toFile();
saveFile.getParentFile().mkdirs();
NBTTagCompound oldNbt = null;
NBTTagList oldList = null;
List<String> oldStringTable = null;
if(saveFile.exists()) {
oldNbt = CompressedStreamTools.readCompressed(new FileInputStream(saveFile));
oldList = oldNbt.getTagList("chunks", NBT.TAG_COMPOUND);;
oldStringTable = Arrays.asList(oldNbt.getString("stringTable").split("\\n"));
}
NBTTagCompound nbt = new NBTTagCompound();
nbt.setByte("V", (byte)0);
nbt.setString("stringTable", String.join("\n", (List<String>) ((TextureMap)Minecraft.getMinecraft().getTextureManager().getTexture(TextureMap.locationBlocksTexture)).mapUploadedSprites.keySet().stream().collect(Collectors.toList())));
NBTTagList list = new NBTTagList();
int idx = 0;
for(int i = 0; i < 32; i++) {
for(int j = 0; j < 32; j++) {
list.appendTag(data[i][j].saveToNBT(oldNbt == null ? null : oldList.getCompoundTagAt(idx++),
oldNbt == null? null : oldStringTable));
}
}
nbt.setTag("chunks", list);
new Thread(
new Runnable() {
@Override
public void run() {
try {
CompressedStreamTools.writeCompressed(nbt, new FileOutputStream(saveFile));
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public LODChunk getChunkAbsolute(int chunkXAbs, int chunkZAbs) {
return getChunk(chunkXAbs - regionX * 32, chunkZAbs - regionZ * 32);
}
public LODChunk getChunk(int x, int z) {
if(x >= 0 && x < 32 && z >= 0 && z < 32) {
return data[x][z];
} else {
return null;
}
}
public LODChunk putChunk(Chunk chunk) {
int relX = chunk.xPosition - regionX * 32;
int relZ = chunk.zPosition - regionZ * 32;
if(relX >= 0 && relX < 32 && relZ >= 0 && relZ < 32) {
data[relX][relZ].receiveChunk(chunk);
return data[relX][relZ];
}
return null;
}
public boolean tick(Entity player) {
int visibleChunks = 0;
for(int i = 0; i < 32; i++) {
for(int j = 0; j < 32; j++) {
LODChunk chunk = data[i][j];
if(chunk != null) {
chunk.tick(player);
if(chunk.visible) {
visibleChunks++;
}
}
}
}
return visibleChunks > 0;
}
public void destroy(Path saveDir) {
save(saveDir);
for(int i = 0; i < 32; i++) {
for(int j = 0; j < 32; j++) {
LODChunk chunk = data[i][j];
if(chunk != null) {
chunk.destroy();
}
}
}
}
public double distanceTaxicab(Entity entity) {
double centerX = ((regionX * 32) + 16) * 16;
double centerZ = ((regionZ * 32) + 16) * 16;
return Math.max(Math.abs(centerX - entity.posX), Math.abs(centerZ - entity.posZ));
}
@Override
public String toString() {
return "LODRegion(" + regionX + ", " + regionZ + ")";
}
}
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