import java.io.*;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;



import org.jnbt.*;

public class test
{
    static byte[] ref;
    static boolean[][][] picked = new boolean[16][16][128];
    static MCObjWriter out = new MCObjWriter();
    static int count;
    public static ArrayList<String> list = new ArrayList<String>();

    public static void main(String[] args) throws IOException
    {
        File f = new File("C:\\Users\\adam\\AppData\\Roaming\\.minecraft\\saves\\World1");
        next(f);
        Collections.sort(list);
        File outfile = new File("objtest.obj");
        for(String thing : list)
        {
            if (count > 300)
                break;
            picked = new boolean[16][16][128];
            FileInputStream i;
            try {
                i = new FileInputStream(new File(thing));
            } catch (FileNotFoundException e) {
                break;
            }
            Tag t = Tag.readFrom(i);
            int xoffset = (Integer) t.findTagByName("xPos").getValue();
            int zoffset = (Integer) t.findTagByName("zPos").getValue();
            xoffset*=16;
            zoffset*=16;
            t = t.findTagByName("Blocks");
            byte[] blocks = (byte[]) t.getValue();
            ref = blocks;
            Byte current;




            for (int y = 0; y < 128; y++)
            {
                for (int z = 0; z < 16; z++)
                {
                    for(int x = 0; x < 16; x++)
                    {
                        current = blocks[y + (z*128 + (x*128*16))];

                        if(current == 0 || current == 18 || current == 9)
                        {
                            if((x!=0) && blocks[y + (z*128 + ((x-1)*128*16))] != 0 && draw(x-1,y,z))
                                out.add(x-1 + xoffset, y, z + zoffset, blocks[y + (z*128 + ((x-1)*128*16))]);
                            if((z!=0) && blocks[y + ((z-1)*128 + ((x)*128*16))] != 0 && draw(x,y,z-1))
                                out.add(x + xoffset, y, z-1 + zoffset, blocks[y + ((z-1)*128 + ((x)*128*16))]);
                            if((y!=0) && blocks[y-1 + ((z)*128 + ((x)*128*16))] != 0 && draw(x,y-1,z))
                                out.add(x + xoffset, y-1, z + zoffset, blocks[y-1 + ((z)*128 + ((x)*128*16))]);

                            if((x!=15) && blocks[y + (z*128 + ((x+1)*128*16))] != 0 && draw(x+1,y,z))
                                out.add(x+1 + xoffset, y, z + zoffset, blocks[y + (z*128 + ((x+1)*128*16))]);
                            if((z!=15) && blocks[y + ((z+1)*128 + ((x)*128*16))] != 0 && draw(x,y,z+1))
                                out.add(x + xoffset, y, z+1 + zoffset, blocks[y + ((z+1)*128 + ((x)*128*16))]);
                            if((y!=127) && blocks[y+1 + ((z)*128 + ((x)*128*16))] != 0 && draw(x,y+1,z))
                                out.add(x + xoffset, y+1, z + zoffset, blocks[y+1 + ((z)*128 + ((x)*128*16))]);
                        }

                    }
                    //System.out.println("");
                }
                //System.out.println("\n\n\n\n");
            }
            System.out.println("done! " + ++count);
        }
        out.write(outfile);
        System.out.println("completely done!");
    }

    public static boolean draw(int x, int y,int z)
    {
        if(!picked[x][z][y])
        {
            picked[x][z][y] = true;
            return true;
        }
        return false;
    }

    public static void next(File current)
    {
        if(current.isDirectory())
        {
            for(String s : current.list())
            {
                next(new File(current.getAbsolutePath() + "\\" + s));
            }
        }
        else
        {
            if (current.toString().endsWith(".dat"))
                list.add(current.toString());
        }
        return;
    }
}