import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.security.SecureRandom;

public class InputFileMaker {

	private static final String AB = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_______________________________________________________________";
	private static SecureRandom rnd = new SecureRandom();

	public static void main(String[] args) {
		new InputFileMaker();
	}

	public InputFileMaker(){
		String oldFileName = "ChangeLogOriginal.txt";
	      String tmpFileName = "tmp_ChangeLog.txt";

	      BufferedReader br = null;
	      BufferedWriter bw = null;
	      try {
	         br = new BufferedReader(new FileReader(oldFileName));
	         bw = new BufferedWriter(new FileWriter(tmpFileName));
	         String line;
	         while ((line = br.readLine()) != null) {
	            if (line.contains("=>")){
	               line = this.getNewLine(line);
	            }
	            bw.write(line+"\n");
	         }
	      } catch (Exception e) {
	         return;
	      } finally {
	         try {
	            if(br != null)
	               br.close();
	         } catch (IOException e) {
	            e.printStackTrace();
	         }
	         try {
	            if(bw != null)
	               bw.close();
	         } catch (IOException e) {
	            e.printStackTrace();
	         }
	      }
	}

	public String getNewLine(String line){
		StringBuilder ret = new StringBuilder(line);
		String key = this.getKey(line);
		if(key == null || key.contains("net.minecraft") || key.contains("optifine")){
			return line;
		}
		for(int i = 0; i<key.length(); i++){
			ret.deleteCharAt(ret.length()-1);
		}
		ret.append("	VanadiaSecurity_");
		ret.append(this.randomString(20));
		ret.append(key);
		return ret.toString();
	}

	public String getKey(String line){
		line = line.replaceAll("	", "");
		String[] tab = line.split("=>");
		if(tab.length < 2 || line.contains("Package: ")){
			return null;
		}
		return tab[1];
	}

	String randomString(int len){
		   StringBuilder sb = new StringBuilder( len );
		   for( int i = 0; i < len; i++ )
		      sb.append( AB.charAt( rnd.nextInt(AB.length()) ) );
		   return sb.toString();
	}
}