import javax.imageio.*;
import java.awt.image.*;
import java.awt.event.*;
import java.awt.*;
import java.security.NoSuchAlgorithmException;
import java.security.MessageDigest;
import java.lang.management.*;
import java.lang.ref.*;
import java.lang.reflect.*;
import java.net.*;
import java.io.*;
import javax.swing.table.*;
import javax.swing.text.*;
import javax.swing.event.*;
import javax.swing.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.*;
import java.util.regex.*;
import java.util.List;
import java.util.zip.*;
import java.util.*;


public class main {
  public static void main(String[] args) throws Exception {
    makeAndroid3("Bot receiving bot.");
  }
  
  static synchronized String answer(String s, List<String> history) {
    Matches m = new Matches();
    
    if (match3("please start bot * with data *.", s, m)) {
      String botID = formatSnippetID(unquote(m.m[0]));
      String dataID = formatSnippetID(unquote(m.m[1]));
      return doIt(botID, dataID);
    }
      
    if (match3("please start bot * with no data.", s, m)) {
      String botID = formatSnippetID(unquote(m.m[0]));
      return doIt(botID, null);
    }
      
    if (match3("please start bot from data *.", s, m)) {
      String dataID = formatSnippetID(unquote(m.m[0]));
      String title = getSnippetTitle(dataID);
      if (!find3("zip of #*", title, m))
        fail("Bot ID not found in title: " + quote(title));
      String botID = formatSnippetID(unquote(m.m[0]));
      return doIt(botID, dataID);
    }
      
    return null;
  }
  
  static String doIt(String botID, String dataID) {
    print("Killing " + botID);
    killProgramID(botID);
    
    if (dataID == null) {
      print("Clearing data directory for " + botID);
      backupAndCleanProgramDir(botID);
    } else {
      print("Unpacking " + dataID + " for " + botID);
      unpackProgramData(botID, dataID);
    }
    
    print("Starting " + botID);
    nohupJavax("" + parseSnippetID(botID));
    
    return "All done.";
  }
  
  static void unpackProgramData(String botID, String dataID) {
    // TODO: check if the same data is there already,
    // then skip all this.
    
    if (sameSnippetID(dataID, "#1001471"))
      dataID = null;
    
    backupAndCleanProgramDir(botID);
    if (dataID != null)
      zip2dir(loadLibrary(dataID), new File(userHome()), "JavaX-Data/" + formatSnippetID(botID));
  }

static void nohupJavax(String javaxargs) {
  javaxargs = javaxargs.trim();
  if (javaxargs.startsWith("#")) javaxargs = javaxargs.substring(1);
  String snippetID = javaTok(javaxargs).get(1);
  int idx = javaxargs.indexOf(' ');
  String args = idx < 0 ? "" : javaxargs.substring(idx+1).trim();
  
  String line;
  if (args.length() != 0)
    line = format3("please start program * with arguments *", snippetID, args);
  else
    line = format3("please start program *", snippetID);
  String answer = sendToLocalBotOpt("A pre-spun VM.", line);
  if (match3("ok", answer)) {
    print("OK, used pre-spun VM.");
  } else {
    if (answer != null)
      print("> " + answer);
    print("Using standard nohup.");
    classicNohupJavax(javaxargs);
  }
}

static void backupAndCleanProgramDir(String progID) {
  progID = formatSnippetID(progID);
  File dir = getProgramDir(progID);
  if (!dir.exists()) return;
  File backupDir;
  long date;
  do {
    date = now();
    backupDir = new File(userHome(), "JavaX-Backup/" + progID + "/" + date);
  } while (backupDir.exists());
  
  mkdirsForFile(backupDir);
  dir.renameTo(backupDir);
  print("Moved " + dir.getAbsolutePath() + " to " + backupDir.getAbsolutePath());
}

  static void zip2dir(File inZip, File outDir) {
    zip2dir(inZip, outDir, "");
  }
  
  static void zip2dir(File inZip, File outDir, String prefix) { try {
 
    if (prefix.length() != 0 && !prefix.endsWith("/")) prefix += "/";
    
    ZipFile zipFile = new ZipFile(inZip);
    Enumeration entries = zipFile.entries();
    while (entries.hasMoreElements()) {
      ZipEntry entry = (ZipEntry) entries.nextElement(); 
      
      if (entry.isDirectory()) continue; // We care about files only, really. Directories are made on the fly anyway.
      
      if (!entry.getName().startsWith(prefix)) continue;
      
      File outFile = new File(outDir, entry.getName());
      System.out.println("Unzipping " + entry.getName() + " to " + outFile.getAbsolutePath());
      
      stream2file(zipFile.getInputStream(entry), outFile);
    }
    zipFile.close();
  
} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
  


static boolean sameSnippetID(String a, String b) {
  return a != null && b != null && parseSnippetID(a) == parseSnippetID(b);
}

static boolean killProgramID(String idToKill) {
  print("Killing program " + idToKill);
  boolean killedAnything = false;
  for (ProgramScan.Program p : quickBotScan()) {
    if (p.helloString.startsWith("This is a JavaX VM")
      && isVMRunningProgram(p.port, idToKill)) {
      print("Killing port " + p.port + " (program id: " + idToKill + ")");
      killPortAndWait(p.port);
      killedAnything = true;
    }
  }
  return killedAnything;
}




  static abstract class DialogIO {
    abstract boolean isStillConnected();
    abstract String readLineNoBlock();
    abstract boolean waitForLine();
    abstract void sendLine(String line);
    abstract boolean isLocalConnection();
    abstract Socket getSocket();
    abstract void close();
    
    String readLine() {
      waitForLine();
      return readLineNoBlock();
    }
    
    String ask(String s, Object... args) {
      if (args.length != 0) s = format3(s, args);
      sendLine(s);
      return readLine();
    }
    
    String askLoudly(String s, Object... args) {
      if (args.length != 0) s = format3(s, args);
      print("> " + s);
      sendLine(s);
      String answer = readLine();
      print("< " + answer);
      return answer;
    }
  }
  
  static abstract class DialogHandler {
    abstract void run(DialogIO io);
  } // Dialog classes


static class Android3 {
  String greeting;
  boolean publicOverride; // optionally set this in client
  int startPort = 5000; // optionally set this in client
  Responder responder;
  boolean console = true;
  boolean daemon = false;
  
  // set by system
  int port;
  DialogHandler handler;
  ServerSocket server;
  
  Android3(String greeting) {
  this.greeting = greeting;}
  Android3() {}
  
  synchronized void dispose() {
    if (server == null) return;
    try {
      server.close();
    } catch (IOException e) {
      print("[internal] " + e);
    }
    server = null;
  }
}

static abstract class Responder {
  abstract String answer(String s, List<String> history);
}

static Android3 makeAndroid3(final String greeting) {
  return makeAndroid3(new Android3(greeting));
}

static String makeAndroid3_callStaticAnswerMethod(String s, List<String> history) {
  String answer = (String) callOpt(getMainClass(), "answer", s, history);
  if (answer == null)
    answer = (String) callOpt(getMainClass(), "answer", s);
  return answer;
}

static Android3 makeAndroid3(final Android3 a) {
  if (a.responder == null)
    a.responder = new Responder() {
      String answer(String s, List<String> history) {
        return makeAndroid3_callStaticAnswerMethod(s, history);
      }
    };
   
  print(a.greeting);
  a.handler = makeAndroid3_makeDialogHandler(a);
  a.port = a.daemon
    ? startDialogServerOnPortAboveDaemon(a.startPort, a.handler)
    : startDialogServerOnPortAbove(a.startPort, a.handler);
  a.server = startDialogServer_serverSocket;

  if (a.console && makeAndroid3_consoleInUse()) a.console = false;
  
  if (a.console) {
    // Console handling stuff
    print("You may also type on this console.");
    Thread _t_0 = new Thread() {
public void run() {
try {

      List<String> history = new ArrayList<String>();
      String line;
      while ((line = readLine()) != null) {
        if ("bye".equals(line)) {
          print("> bye stranger");
          history = new ArrayList<String>();
        } else {
          history.add(line);
          history.add(makeAndroid3_getAnswer(line, history, a)); // prints answer on console too
        }
      }
    } catch (Exception _e) {
  throw _e instanceof RuntimeException ? (RuntimeException) _e : new RuntimeException(_e); } }
};
_t_0.start();
  }
  
  record(a);
  return a;
}

static DialogHandler makeAndroid3_makeDialogHandler(final Android3 a) {
  return new DialogHandler() {
public void run(final DialogIO io) {

    if (!a.publicOverride && !(publicCommOn() || io.isLocalConnection())) {
      io.sendLine("Sorry, not allowed");
      return;
    }
    
    String dialogID = randomID(8);
    
    io.sendLine(a.greeting + " / Your ID: " + dialogID);
    
    List<String> history = new ArrayList<String>();
    
    while (io.isStillConnected()) {
      if (io.waitForLine()) {
        final String line = io.readLineNoBlock();
        String s = dialogID + " at " + now() + ": " + quote(line);
        print(s);
        if ("bye".equals(line)) {
          io.sendLine("bye stranger");
          return;
        }
        Matches m = new Matches();
        history.add(line);
        String answer;
        if (match3("this is a continuation of talk *", s, m)
          || match3("hello bot! this is a continuation of talk *", s, m)) {
          dialogID = unquote(m.m[0]);
          answer = "ok";
        } else
          answer = makeAndroid3_getAnswer(line, history, a);
        history.add(answer);
        io.sendLine(answer);
        //appendToLog(logFile, s);
      }
    }
  
}};
}

static String makeAndroid3_getAnswer(String line, List<String> history, Android3 a) {
  String answer;
  try {
    answer = makeAndroid3_fallback(line, history, a.responder.answer(line, history));
  } catch (Throwable e) {
    e = getInnerException(e);
    e.printStackTrace();
    answer = e.toString();
  }
  print("> " + shorten(answer, 500));
  return answer;
}

static String makeAndroid3_fallback(String s, List<String> history, String answer) {
  // Now we only do the safe thing instead of VM inspection - give out our process ID
  if (answer == null && match3("what is your pid", s))
    return getPID();
    
  if (answer == null && match3("what is your program id", s)) // should be fairly safe, right?
    return getProgramID();
    
  if (answer == null) answer = "?";
  if (answer.indexOf('\n') >= 0 || answer.indexOf('\r') >= 0)
    answer = quote(answer);
  return answer;
}

static boolean makeAndroid3_consoleInUse() {
  for (Object o : record_list)
    if (o instanceof Android3 && ((Android3) o).console)
      return true;
  return false;
}


  static String quote(String s) {
    if (s == null) return "null";
    return "\"" + s.replace("\\", "\\\\").replace("\"", "\\\"").replace("\r", "\\r").replace("\n", "\\n") + "\"";
  }
  
  static String quote(long l) {
    return quote("" + l);
  }


  static class Matches { String[] m; }
  
  static boolean find3(String pat, String s) {
    return find3(pat, s, null);
  }
  
  static boolean find3(String pat, String s, Matches matches) {
    List<String> tokpat = parse3(pat), toks = parse3(s);
    String[] m = find2(tokpat, toks);
    //print(structure(tokpat) + " on " + structure(toks) + " => " + structure(m));
    if (m == null)
      return false;
    else {
      if (matches != null) matches.m = m;
      return true;
    }
  }
static boolean match3(String pat, String s) {
    return match3(pat, s, null);
  }
  
  static boolean match3(String pat, String s, Matches matches) {
    if (s == null) return false;
    List<String> tokpat = parse3(pat), toks = parse3(s);
    String[] m = match2(tokpat, toks);
    //print(structure(tokpat) + " on " + structure(toks) + " => " + structure(m));
    if (m == null)
      return false;
    else {
      if (matches != null) matches.m = m;
      return true;
    }
  }

static String getSnippetTitle(String id) { try {
 
  return loadPage(new URL("http://tinybrain.de:8080/tb-int/getfield.php?id=" + parseSnippetID(id) + "&field=title"));

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

static File loadLibrary(String snippetID) {
  return loadBinarySnippet(snippetID);
}

static void print() {
  System.out.println();
}

static void print(Object o) {
  System.out.println(o);
}

static void print(long i) {
  System.out.println(i);
}

  public static String unquote(String s) {
    if (s.startsWith("[")) {
      int i = 1;
      while (i < s.length() && s.charAt(i) == '=') ++i;
      if (i < s.length() && s.charAt(i) == '[') {
        String m = s.substring(1, i);
        if (s.endsWith("]" + m + "]"))
          return s.substring(i+1, s.length()-i-1);
      }
    }
    
    if (s.startsWith("\"") && s.endsWith("\"") && s.length() > 1) {
      String st = s.substring(1, s.length()-1);
      StringBuilder sb = new StringBuilder(st.length());
  
      for (int i = 0; i < st.length(); i++) {
        char ch = st.charAt(i);
        if (ch == '\\') {
          char nextChar = (i == st.length() - 1) ? '\\' : st
                  .charAt(i + 1);
          // Octal escape?
          if (nextChar >= '0' && nextChar <= '7') {
              String code = "" + nextChar;
              i++;
              if ((i < st.length() - 1) && st.charAt(i + 1) >= '0'
                      && st.charAt(i + 1) <= '7') {
                  code += st.charAt(i + 1);
                  i++;
                  if ((i < st.length() - 1) && st.charAt(i + 1) >= '0'
                          && st.charAt(i + 1) <= '7') {
                      code += st.charAt(i + 1);
                      i++;
                  }
              }
              sb.append((char) Integer.parseInt(code, 8));
              continue;
          }
          switch (nextChar) {
          case '\\':
              ch = '\\';
              break;
          case 'b':
              ch = '\b';
              break;
          case 'f':
              ch = '\f';
              break;
          case 'n':
              ch = '\n';
              break;
          case 'r':
              ch = '\r';
              break;
          case 't':
              ch = '\t';
              break;
          case '\"':
              ch = '\"';
              break;
          case '\'':
              ch = '\'';
              break;
          // Hex Unicode: u????
          case 'u':
              if (i >= st.length() - 5) {
                  ch = 'u';
                  break;
              }
              int code = Integer.parseInt(
                      "" + st.charAt(i + 2) + st.charAt(i + 3)
                              + st.charAt(i + 4) + st.charAt(i + 5), 16);
              sb.append(Character.toChars(code));
              i += 5;
              continue;
          }
          i++;
        }
        sb.append(ch);
      }
      return sb.toString();      
    } else
      return s; // return original
  }

  static RuntimeException fail() {
    throw new RuntimeException("fail");
  }
  
  static RuntimeException fail(Object msg) {
    throw new RuntimeException(String.valueOf(msg));
  }

static String _userHome;
static String userHome() {
  if (_userHome == null) {
    if (isAndroid())
      _userHome = "/storage/sdcard0/";
    else
      _userHome = System.getProperty("user.home");
    //System.out.println("userHome: " + _userHome);
  }
  return _userHome;
}


public static long parseSnippetID(String snippetID) {
  return Long.parseLong(shortenSnippetID(snippetID));
}

static String formatSnippetID(String id) {
  return "#" + parseSnippetID(id);
}

static String formatSnippetID(long id) {
  return "#" + id;
}

static boolean isVMRunningProgram(int vmPort, String progID) {
  progID = "" + parseSnippetID(progID);
  String s = sendToLocalBot(vmPort, "which programs are you running (ids only)");
  Matches m = new Matches();
  if (match3("these: *", s, m)) {
    List<String> l = (List) unstructure(unquote(m.m[0]));
    if (l.contains(progID))
      return true;
  }
  return false;
}

// closes the input stream too.
static void stream2file(InputStream in, File out) { try {
 
  mkdirsForFile(out);
  FileOutputStream fos = new FileOutputStream(out);
  copyStream(in, fos);
  in.close();
  fos.close();

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

static void killPortAndWait(int port) {
  killPortAndWait("localhost", port);
}

static void killPortAndWait(String ip, int port) {
  print("Sending kill switch to " + ip + ":" + port);
  DialogIO io = talkTo(ip, port);
  io.sendLine("kill!");
  try {
    // wait until it is closed from other side
    String s;
    while ((s = io.readLine()) != null)
      print(port + "< " + s);
  } catch (Exception e) {}
  io.close(); // never throws exceptions
}

static String sendToLocalBotOpt(String bot, String text) {
  if (bot == null) return null;
  DialogIO channel = findBot(bot);
  if (channel == null) {
    print(quote(bot) + " not found, skipping send: " + quote(text));
    return null;
  }
  try {
    channel.readLine();
    print(bot + "> " + text);
    channel.sendLine(text);
    String s = channel.readLine();
    print(bot + "< " + s);
    return s;
  } catch (Throwable e) {
    e.printStackTrace();
    return null;
  } finally {
    channel.close();
  }
}

static File getProgramDir() {
  return programDir();
}

static File getProgramDir(String snippetID) {
  return programDir(snippetID);
}

  static String format3(String pat, Object... args) {
    if (args.length == 0) return pat;
    
    List<String> tok = javaTokPlusPeriod(pat);
    int argidx = 0;
    for (int i = 1; i < tok.size(); i += 2)
      if (tok.get(i).equals("*"))
        tok.set(i, format3_formatArg(argidx < args.length ? args[argidx++] : "null"));
    return join(tok);
  }
  
  static String format3_formatArg(Object arg) {
    if (arg == null) return "null";
    if (arg instanceof String) return quote((String) arg);
    return quote(structure(arg));
  }
  


// We dropped the "***" support here (use match3 for that)

static String[] find2(List<String> pat, List<String> tok) {
  for (int idx = 0; idx < tok.size(); idx += 2) {
    String[] result = find2(pat, tok, idx);
    if (result != null) return result;
  }
  return null;
}

static String[] find2(List<String> pat, List<String> tok, int idx) {
  if (idx+pat.size() > tok.size())
    return null;
  List<String> result = new ArrayList<String>();
  for (int i = 1; i < pat.size(); i += 2) {
    String p = pat.get(i), t = tok.get(idx+i);
    if ("*".equals(p))
      result.add(t);
    else if (!p.equalsIgnoreCase(t))
      return null;
  }
  return toStringArray(result);
}


  static Object callOpt(Object o, String method, Object... args) {
    try {
      if (o instanceof Class) {
        Method m = callOpt_findStaticMethod((Class) o, method, args, false);
        if (m == null) return null;
        m.setAccessible(true);
        return m.invoke(null, args);
      } else {
        Method m = callOpt_findMethod(o, method, args, false);
        if (m == null) return null;
        m.setAccessible(true);
        return m.invoke(o, args);
      }
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  static Method callOpt_findStaticMethod(Class c, String method, Object[] args, boolean debug) {
    Class _c = c;
    while (c != null) {
      for (Method m : c.getDeclaredMethods()) {
        if (debug)
          System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
        if (!m.getName().equals(method)) {
          if (debug) System.out.println("Method name mismatch: " + method);
          continue;
        }

        if ((m.getModifiers() & Modifier.STATIC) == 0 || !callOpt_checkArgs(m, args, debug))
          continue;

        return m;
      }
      c = c.getSuperclass();
    }
    return null;
  }

  static Method callOpt_findMethod(Object o, String method, Object[] args, boolean debug) {
    Class c = o.getClass();
    while (c != null) {
      for (Method m : c.getDeclaredMethods()) {
        if (debug)
          System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
        if (m.getName().equals(method) && callOpt_checkArgs(m, args, debug))
          return m;
      }
      c = c.getSuperclass();
    }
    return null;
  }

  private static boolean callOpt_checkArgs(Method m, Object[] args, boolean debug) {
    Class<?>[] types = m.getParameterTypes();
    if (types.length != args.length) {
      if (debug)
        System.out.println("Bad parameter length: " + args.length + " vs " + types.length);
      return false;
    }
    for (int i = 0; i < types.length; i++)
      if (!(args[i] == null || isInstanceX(types[i], args[i]))) {
        if (debug)
          System.out.println("Bad parameter " + i + ": " + args[i] + " vs " + types[i]);
        return false;
      }
    return true;
  }



static Class getMainClass() { try {
 
  return Class.forName("main");

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

static Throwable getInnerException(Throwable e) {
  while (e.getCause() != null)
    e = e.getCause();
  return e;
}


static class ProgramScan {
  static int threads = isWindows() ? 500 : 10;
  static int timeout = 5000; // hmm...
  static String ip = "127.0.0.1";
  static int quickScanFrom = 10000, quickScanTo = 10999;
  
  static class Program {
    int port;
    String helloString;
    
    Program(int port, String helloString) {
  this.helloString = helloString;
  this.port = port;}
  }
  
  static List<Program> scan() { try {
 
    return scan(1, 65535);
  
} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
  
  static List<Program> scan(int fromPort, int toPort) {
    return scan(fromPort, toPort, new int[0]);
  }
  
  static List<Program> scan(int fromPort, int toPort, int[] preferredPorts) { try {
 
    Set<Integer> preferredPortsSet = new HashSet<Integer>(asList(preferredPorts));
    String name = toPort < 10000 ? "bot" : "program";
    final ExecutorService es = Executors.newFixedThreadPool(threads);
    print(firstToUpper(name) + "-scanning " + ip + " with timeout " + timeout + " ms in " + threads + " threads.");
    startTiming();
    List<Future<Program>> futures = new ArrayList<Future<Program>>();
    for (int port : preferredPorts)
      futures.add(checkPort(es, ip, port, timeout));
    for (int port = fromPort; port <= toPort; port++)
      if (!preferredPortsSet.contains(port))
        futures.add(checkPort(es, ip, port, timeout));
    es.shutdown();
    List<Program> programs = new ArrayList<Program>();
    for (final Future<Program> f : futures) {
      Program p = f.get();
      if (p != null)
        programs.add(p);
    }
    stopTiming();
    print("Found " + programs.size() + " " + name + "(s) on " + ip);
    return programs;
  
} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

  static Future<Program> checkPort(final ExecutorService es, final String ip, final int port, final int timeout) {
    return es.submit(new Callable<Program>() {
        @Override public Program call() {
          try {
            Socket socket = new Socket();
            socket.setSoTimeout(timeout);
            socket.connect(new InetSocketAddress(ip, port), timeout);
            print("Connected to " + ip + ":" + port);
            BufferedReader in = new BufferedReader(
              new InputStreamReader(socket.getInputStream(), "UTF-8"));
            String hello = in.readLine();
            socket.close();
            return new Program(port, hello);
          } catch (Exception ex) {
            return null;
          }
        }
     });
  }
  
  static List<Program> quickScan() {
    return scan(quickScanFrom, quickScanTo);
  }
  
  static List<Program> quickBotScan() {
    return quickBotScan(new int[0]);
  }
  
  static List<Program> quickBotScan(int[] preferredPorts) {
    return scan(4990, 5999, preferredPorts);
  }
} // ProgramScan

static List<ProgramScan.Program> quickBotScan() {
  return ProgramScan.quickBotScan();
}

static List<ProgramScan.Program> quickBotScan(int[] preferredPorts) {
  return ProgramScan.quickBotScan(preferredPorts);
}

static List<ProgramScan.Program> quickBotScan(String searchPattern) {
  List<ProgramScan.Program> l = new ArrayList<ProgramScan.Program>();
  for (ProgramScan.Program p : ProgramScan.quickBotScan())
    if (indexOfIgnoreCase(p.helloString, searchPattern) == 0)
      l.add(p);
  return l;
}


static boolean publicCommOn() {
  return "1".equals(loadTextFile(new File(userHome(), ".javax/public-communication")));
}

static List<Object> record_list = synchroList();

static void record(Object o) {
  record_list.add(o);
}

// try to get our current process ID
static String getPID() {
  String name = ManagementFactory.getRuntimeMXBean().getName();
  return name.replaceAll("@.*", "");
}


static String programID;

static String getProgramID() {
  return programID;
}

  static AtomicInteger dialogServer_clients = new AtomicInteger();
  static boolean dialogServer_printConnects;
  
  static Set<String> dialogServer_knownClients = synchroTreeSet();
  
  static int startDialogServerOnPortAbove(int port, DialogHandler handler) {
    while (!startDialogServerIfPortAvailable(port, handler))
      ++port;
    return port;
  }
  
  static int startDialogServerOnPortAboveDaemon(int port, DialogHandler handler) {
    while (!startDialogServerIfPortAvailable(port, handler, true))
      ++port;
    return port;
  }
  
  static void startDialogServer(int port, DialogHandler handler) {
    if (!startDialogServerIfPortAvailable(port, handler))
      fail("Can't start dialog server on port " + port);
  }
  
  static boolean startDialogServerIfPortAvailable(int port, final DialogHandler handler) {
    return startDialogServerIfPortAvailable(port, handler, false);
  }
  
  static ServerSocket startDialogServer_serverSocket;
    
  static boolean startDialogServerIfPortAvailable(int port, final DialogHandler handler, boolean daemon) {
    ServerSocket serverSocket = null;
    try {
      serverSocket = new ServerSocket(port);
    } catch (IOException e) {
      // probably the port number is used - let's assume there already is a chat server.
      return false;
    }
    final ServerSocket _serverSocket = serverSocket;
    startDialogServer_serverSocket = serverSocket;

    Thread thread = new Thread("Socket accept port " + port) { public void run() {
     try {
      while (true) {
        try {
          final Socket s = _serverSocket.accept();
          
          String client = s.getInetAddress().toString();
          if (!dialogServer_knownClients.contains(client)) {
            print("connect from " + client + " - clients: " + dialogServer_clients.incrementAndGet());
            dialogServer_knownClients.add(client);
          }
          
          String threadName = "Handling client " + s.getInetAddress();

          Thread t2 = new Thread(threadName) {
           public void run() {
            try {
              final Writer w = new OutputStreamWriter(s.getOutputStream(), "UTF-8");
              final BufferedReader in = new BufferedReader(
                new InputStreamReader(s.getInputStream(), "UTF-8"));
              DialogIO io = new DialogIO() {
                String line;
                boolean buff;
                
                Socket getSocket() { return s; }
                
                void close() {
                  try {
                    s.close();
                  } catch (IOException e) {
                    // whatever
                  }
                }
                
                // local means localhost - todo: test
                boolean isLocalConnection() {
                  return s.getInetAddress().isLoopbackAddress();
                }
                
                boolean isStillConnected() {
                  return !(buff || s.isClosed());
                }
                
                String readLineNoBlock() {
                  String l = line;
                  line = null;
                  return l;
                }
                
                boolean waitForLine() { try {
 
                  if (line != null) return true;
                  //print("Readline");
                  line = in.readLine();
                  //print("Readline done: " + line);
                  if (line == null) buff = true;
                  return line != null;
                
} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
                
                void sendLine(String line) { try {
 
                  w.write(line + "\n");
                  w.flush();
                
} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
              };
              
              try {
                handler.run(io);
              } finally {
                s.close();
              }
            } catch (IOException e) {
              print("[internal] " + e);
            } finally {
              //print("client disconnect - " + dialogServer_clients.decrementAndGet() + " remaining");
            }
           }
          }; // Thread t2
          t2.setDaemon(true); // ?
          t2.start();
        } catch (SocketTimeoutException e) {
        }
      }   
     } catch (IOException e) {
       print("[internal] " + e);
     }
    }};
    if (daemon) thread.setDaemon(true);
    thread.start();
   
    print("Dialog server on port " + port + " started."); 
    return true;
  }

  static List<String> parse3(String s) {
    return dropPunctuation(javaTokPlusPeriod(s));
  }


static BufferedReader readLine_reader;

static String readLine() { try {
 
  if (readLine_reader == null)
    readLine_reader = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
  String s = readLine_reader.readLine();
  if (s != null)
    print(s);
  return s;

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

static String randomID(int length) {
  return makeRandomID(length);
}

static boolean isAndroid() { return System.getProperty("java.vendor").toLowerCase().indexOf("android") >= 0; }

static void classicNohupJavax(String javaxargs) { try {
 
  int x = latestInstalledJavaX();
  File xfile = new File(userHome(), ".javax/x" + Math.max(x, 26) + ".jar");
  if (!xfile.isFile()) {
    String url = "http://tinybrain.de/x26.jar";
    byte[] data = loadBinaryPage(url);
    if (data.length < 1000000)
      fail("Could not load " + url);
    saveBinaryFile(xfile.getPath(), data);
  }
  String jarPath = xfile.getPath();
  if (javaxargs.startsWith("#")) javaxargs = javaxargs.substring(1);
  nohup("java -jar " + (isWindows() ? winQuote(jarPath) : bashQuote(jarPath)) + " " + javaxargs);

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

public static void mkdirsForFile(File file) {
  File dir = file.getParentFile();
  if (dir != null) // is null if file is in current dir
    dir.mkdirs();
}


// match2 matches multiple "*" (matches a single token) wildcards and zero or one "..." wildcards (matches multiple tokens)

static String[] match2(List<String> pat, List<String> tok) {
  // standard case (no ...)
  int i = pat.indexOf("...");
  if (i < 0) return match2_match(pat, tok);
  
  pat = new ArrayList<String>(pat); // We're modifying it, so copy first
  pat.set(i, "*");
  while (pat.size() < tok.size()) {
    pat.add(i, "*");
    pat.add(i+1, ""); // doesn't matter
  }
  
  return match2_match(pat, tok);
}

static String[] match2_match(List<String> pat, List<String> tok) {
  List<String> result = new ArrayList<String>();
  if (pat.size() != tok.size()) {
    /*if (debug)
      print("Size mismatch: " + structure(pat) + " vs " + structure(tok));*/
    return null;
  }
  for (int i = 1; i < pat.size(); i += 2) {
    String p = pat.get(i), t = tok.get(i);
    /*if (debug)
      print("Checking " + p + " against " + t);*/
    if ("*".equals(p))
      result.add(t);
    else if (!p.equalsIgnoreCase(t))
      return null;
  }
  return result.toArray(new String[result.size()]);
}


static long now_virtualTime;
static long now() {
  return now_virtualTime != 0 ? now_virtualTime : System.currentTimeMillis();
}


// replacement for class JavaTok
// maybe incomplete, might want to add floating point numbers
// todo also: extended multi-line strings

static List<String> javaTok(String s) {
  List<String> tok = new ArrayList<String>();
  int l = s.length();
  
  int i = 0;
  while (i < l) {
    int j = i;
    char c; String cc;
    
    // scan for whitespace
    while (j < l) {
      c = s.charAt(j);
      cc = s.substring(j, Math.min(j+2, l));
      if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
        ++j;
      else if (cc.equals("/*")) {
        do ++j; while (j < l && !s.substring(j, Math.min(j+2, l)).equals("*/"));
        j = Math.min(j+2, l);
      } else if (cc.equals("//")) {
        do ++j; while (j < l && "\r\n".indexOf(s.charAt(j)) < 0);
      } else
        break;
    }
    
    tok.add(s.substring(i, j));
    i = j;
    if (i >= l) break;
    c = s.charAt(i); // cc is not needed in rest of loop body
    cc = s.substring(i, Math.min(i+2, l));

    // scan for non-whitespace
    if (c == '\'' || c == '"') {
      char opener = c;
      ++j;
      while (j < l) {
        if (s.charAt(j) == opener) {
          ++j;
          break;
        } else if (s.charAt(j) == '\\' && j+1 < l)
          j += 2;
        else
          ++j;
      }
    } else if (Character.isJavaIdentifierStart(c))
      do ++j; while (j < l && Character.isJavaIdentifierPart(s.charAt(j)));
    else if (Character.isDigit(c))
      do ++j; while (j < l && Character.isDigit(s.charAt(j)));
    else if (cc.equals("[[")) {
      do ++j; while (j+1 < l && !s.substring(j, j+2).equals("]]"));
      j = Math.min(j+2, l);
    } else
      ++j;

    tok.add(s.substring(i, j));
    i = j;
  }
  
  if ((tok.size() % 2) == 0) tok.add("");
  return tok;
}


static File loadBinarySnippet(String snippetID) { try {
 
  long id = parseSnippetID(snippetID);
  File f = DiskSnippetCache_getLibrary(id);
  if (f == null) {
    byte[] data = loadDataSnippetImpl(snippetID);
    DiskSnippetCache_putLibrary(id, data);
    f = DiskSnippetCache_getLibrary(id);
  }
  return f;

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

  public static String loadPageSilently(String url) {
    try {
      return loadPageSilently(new URL(loadPage_preprocess(url)));
    } catch (IOException e) { throw new RuntimeException(e); }
  }

  public static String loadPageSilently(URL url) {
    try {
      return loadPage(url.openConnection(), url);
    } catch (IOException e) { throw new RuntimeException(e); }
  }

  static String loadPage_preprocess(String url) {  
    if (url.startsWith("tb/"))
      url = "tinybrain.de:8080/" + url;
    if (url.indexOf("://") < 0)
      url = "http://" + url;
    return url;
  }
  
  public static String loadPage(String url) {
    try {
      return loadPage(new URL(loadPage_preprocess(url)));
    } catch (IOException e) { throw new RuntimeException(e); }
  }
  
  public static String loadPage(URL url) {
    try {
      System.out.println("Loading: " + url.toExternalForm());
      return loadPage(url.openConnection(), url);
    } catch (IOException e) { throw new RuntimeException(e); }
  }

  public static String loadPage(URLConnection con, URL url) throws IOException {
    String contentType = con.getContentType();
    if (contentType == null)
      throw new IOException("Page could not be read: " + url);
    //Log.info("Content-Type: " + contentType);
    String charset = loadPage_guessCharset(contentType);
    Reader r = new InputStreamReader(con.getInputStream(), charset);
    StringBuilder buf = new StringBuilder();
    while (true) {
      int ch = r.read();
      if (ch < 0)
        break;
      //Log.info("Chars read: " + buf.length());
      buf.append((char) ch);
    }
    return buf.toString();
  }
  
  static String loadPage_guessCharset(String contentType) {
    Pattern p = Pattern.compile("text/html;\\s+charset=([^\\s]+)\\s*");
    Matcher m = p.matcher(contentType);
    /* If Content-Type doesn't match this pre-conception, choose default and hope for the best. */
    return m.matches() ? m.group(1) : "ISO-8859-1";
  }


static String shorten(String s, int max) {
  return s.length() <= max ? s : s.substring(0, Math.min(s.length(), max)) + "...";
}

static String shortenSnippetID(String snippetID) {
  if (snippetID.startsWith("#"))
    snippetID = snippetID.substring(1);
  String httpBlaBla = "http://tinybrain.de/";
  if (snippetID.startsWith(httpBlaBla))
    snippetID = snippetID.substring(httpBlaBla.length());
  return snippetID;
}

static int length(Object[] array) {
  return array == null ? 0 : array.length;
}

static String sendToLocalBot(String bot, String text) {
  DialogIO channel = findBot(bot);
  if (channel == null)
    fail(quote(bot) + " not found");
  try {
    channel.readLine();
    print(bot + "> " + text);
    channel.sendLine(text);
    String s = channel.readLine();
    print(bot + "< " + s);
    return s;
  } catch (Throwable e) {
    e.printStackTrace();
    return null;
  } finally {
    channel.close();
  }
}

static String sendToLocalBot(int port, String text) {
  DialogIO channel = talkTo(port);
  try {
    channel.readLine();
    print(port + "> " + text);
    channel.sendLine(text);
    String s = channel.readLine();
    print(port + "< " + s);
    return s;
  } catch (Throwable e) {
    e.printStackTrace();
    return null;
  } finally {
    if (channel != null)
      channel.close();
  }
}

static String programID() {
  return getProgramID();
}

static String[] toStringArray(List<String> list) {
  return list.toArray(new String[list.size()]);
}

static String[] toStringArray(Object o) {
  if (o instanceof String[])
    return (String[]) o;
  else if (o instanceof List)
    return toStringArray((List<String>) o);
  else
    throw fail("Not a list or array: " + structure(o));
}


static Map<String, Integer> findBot_cache = new TreeMap<String, Integer>();
static int findBot_timeout = 5000;

static DialogIO findBot(String searchPattern) {
  Integer port = findBot_cache.get(searchPattern);
  if (port != null) try {
    DialogIO io = talkTo("localhost", port);
    io.waitForLine(/*findBot_timeout*/); // TODO: implement
    String line = io.readLineNoBlock();
    if (indexOfIgnoreCase(line, searchPattern) == 0) {
      call(io, "pushback", line); // put hello string back in
      return io;
    }
  } catch (Exception e) {
    e.printStackTrace();
  }
  
  for (ProgramScan.Program p : quickBotScan())
    if (indexOfIgnoreCase(p.helloString, searchPattern) == 0) { // strict matching - start of hello string only, but case-insensitive
      findBot_cache.put(searchPattern, p.port);
      return talkTo("localhost", p.port);
    }
  return null;
}

static <A> Set<A> synchroTreeSet() {
  return Collections.synchronizedSet(new TreeSet<A>());
}


static int latestInstalledJavaX() {
  File[] files = new File(userHome(), ".javax").listFiles();
  int v = 0;
  if (files != null) for (File f : files) {
    Matcher m = Pattern.compile("x(\\d\\d\\d?)\\.jar").matcher(f.getName());
    if (m.matches())
      v = Math.max(v, Integer.parseInt(m.group(1)));
  }
  return v;
}


static DialogIO talkTo(int port) {
  return talkTo("localhost", port);
}

static DialogIO talkTo(String ip, int port) { try {
 
  final Socket s = new Socket(ip, port);    
  print("Talking to " + ip + ":" + port);

  final Writer w = new OutputStreamWriter(s.getOutputStream(), "UTF-8");
  final BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream(), "UTF-8"));
  return new DialogIO() {
    String line;
    boolean buff;
    
    boolean isLocalConnection() {
      return s.getInetAddress().isLoopbackAddress();
    }
    
    boolean isStillConnected() {
      return !(buff || s.isClosed());
    }
    
    String readLineNoBlock() {
      String l = line;
      line = null;
      return l;
    }
    
    boolean waitForLine() { try {
 
      if (line != null) return true;
      //print("Readline");
      line = in.readLine();
      //print("Readline done: " + line);
      if (line == null) buff = true;
      return line != null;
    
} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
    
    void sendLine(String line) { try {
 
      w.write(line + "\n");
      w.flush();
    
} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
    
    void close() {
      try {
        s.close();
      } catch (IOException e) {
        // whatever
      }
    }
    
    Socket getSocket() {
      return s;
    }
    
    void pushback(String l) {
      if (line != null)
        fail();
      line = l;
    }
  };

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

static <A> List<A> synchroList() {
  return Collections.synchronizedList(new ArrayList<A>());
}

static <A> List<A> synchroList(List<A> l) {
  return Collections.synchronizedList(l);
}


static class DynamicObject {
  String className;
  Map<String, Object> fieldValues = new TreeMap<String, Object>();
}

// actually it's now almost the same as jsonDecode :)
static Object unstructure(String text) {
  final List<String> tok = javaTok(text);
  
  class X {
    int i = 1;

    Object parse() {
      String t = tok.get(i);
      if (t.startsWith("\"")) {
        String s = unquote(tok.get(i));
        i += 2;
        return s;
      }
      if (t.equals("{"))
        return parseMap();
      if (t.equals("["))
        return parseList();
      if (t.equals("null")) {
        i += 2; return null;
      }
      if (t.equals("false")) {
        i += 2; return false;
      }
      if (t.equals("true")) {
        i += 2; return true;
      }
      if (isInteger(t)) {
        i += 2; return Long.parseLong(t);
      }
      if (isJavaIdentifier(t)) {
        Class c = findClass(t);
        DynamicObject dO = null;
        Object o = null;
        if (c != null)
          o = nuObject(c);
        else {
          dO = new DynamicObject();
          dO.className = t;
        }
        i += 2;
        if (i < tok.size() && tok.get(i).equals("(")) {
          consume("(");
          while (!tok.get(i).equals(")")) {
            // It's like parsing a map.
            //Object key = parse();
            //if (tok.get(i).equals(")"))
            //  key = onlyField();
            String key = unquote(tok.get(i));
            i += 2;
            consume("=");
            Object value = parse();
            if (o != null)
              set(o, key, value);
            else
              dO.fieldValues.put(key, value);
            if (tok.get(i).equals(",")) i += 2;
          }
          consume(")");
        }
        return o != null ? o : dO;
      }
      throw new RuntimeException("Unknown token " + (i+1) + ": " + t);
    }
    
    Object parseList() {
      consume("[");
      List list = new ArrayList();
      while (!tok.get(i).equals("]")) {
        list.add(parse());
        if (tok.get(i).equals(",")) i += 2;
      }
      consume("]");
      return list;
    }
    
    Object parseMap() {
      consume("{");
      Map map = new TreeMap();
      while (!tok.get(i).equals("}")) {
        String key = unquote(tok.get(i));
        i += 2;
        consume("=");
        Object value = parse();
        map.put(key, value);
        if (tok.get(i).equals(",")) i += 2;
      }
      consume("}");
      return map;
    }
    
    void consume(String s) {
      if (!tok.get(i).equals(s)) {
        String prevToken = i-2 >= 0 ? tok.get(i-2) : "";
        String nextTokens = join(tok.subList(i, Math.min(i+4, tok.size())));
        fail(quote(s) + " expected: " + prevToken + " " + nextTokens + " (" + i + "/" + tok.size() + ")");
      }
      i += 2;
    }
  }
  
  return new X().parse();
}

static File programDir() {
  return programDir(getProgramID());
}

static File programDir(String snippetID) {
  return new File(userHome(), "JavaX-Data/" + formatSnippetID(snippetID));
}


// extended over Class.isInstance() to handle primitive types
static boolean isInstanceX(Class type, Object arg) {
  if (type == boolean.class) return arg instanceof Boolean;
  if (type == int.class) return arg instanceof Integer;
  if (type == long.class) return arg instanceof Long;
  if (type == float.class) return arg instanceof Float;
  if (type == short.class) return arg instanceof Short;
  if (type == char.class) return arg instanceof Character;
  if (type == byte.class) return arg instanceof Byte;
  return type.isInstance(arg);
}

public static void copyStream(InputStream in, OutputStream out) throws IOException {
  byte[] buf = new byte[65536];
  while (true) {
    int n = in.read(buf);
    if (n <= 0) return;
    out.write(buf, 0, n);
  }
}

/** possibly improvable */
public static String bashQuote(String text) {
  if (text == null) return null;
  return "\"" + text
    .replace("\\", "\\\\")
    .replace("\"", "\\\"")
    .replace("\n", "\\n")
    .replace("\r", "\\r") + "\"";
}


/** possibly improvable */
public static String winQuote(String text) {
  if (text == null) return null;
  return "\"" + text
    .replace("\\", "\\\\")
    .replace("\"", "\\\"")
    .replace("\n", "\\n")
    .replace("\r", "\\r") + "\"";
}


public static boolean isWindows() {
  return System.getProperty("os.name").contains("Windows");
}

public static File nohup(String cmd) throws IOException {
  File outFile = File.createTempFile("nohup_" + nohup_sanitize(cmd), ".out");
  nohup(cmd, outFile, false);
  return outFile;
}

static String nohup_sanitize(String s) {
  return s.replaceAll("[^a-zA-Z0-9\\-_]", "");
}

/** outFile takes stdout and stderr. */
public static void nohup(String cmd, File outFile, boolean append) throws IOException {
  String command = nohup_makeNohupCommand(cmd, outFile, append);

  File scriptFile = File.createTempFile("_realnohup", isWindows() ? ".bat" : "");
  System.out.println("[Nohup] " + command);
  try {
    //System.out.println("[RealNohup] Script file: " + scriptFile.getPath());
    saveTextFile(scriptFile.getPath(), command);
    String[] command2;
    if (isWindows())
      command2 = new String[] {"cmd", "/c", "start", "/b", scriptFile.getPath() };
    else
      command2 = new String[] {"/bin/bash", scriptFile.getPath() };
      
    Process process = Runtime.getRuntime().exec(command2);
    try {
      process.waitFor();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }
    int value = process.exitValue();
    //System.out.println("exit value: " + value);
  } finally {
    if (!isWindows())
      scriptFile.delete();
  }
}

public static String nohup_makeNohupCommand(String cmd, File outFile, boolean append) {
  mkdirsForFile(outFile);

  String command;
  if (isWindows())
    command = cmd + (append ? " >>" : " >") + winQuote(outFile.getPath()) + " 2>&1";
  else
    command = "nohup " + cmd + (append ? " >>" : " >") + bashQuote(outFile.getPath()) + " 2>&1 &";
  return command;
}


static List<String> dropPunctuation(List<String> tok) {
  tok = new ArrayList<String>(tok);
  for (int i = 1; i < tok.size(); i += 2) {
    String t = tok.get(i);
    if (t.length() == 1 && !Character.isLetter(t.charAt(0)) && !Character.isDigit(t.charAt(0)) && !t.equals("*")) {
      tok.set(i-1, tok.get(i-1) + tok.get(i+1));
      tok.remove(i);
      tok.remove(i);
      i -= 2;
    }
  }
  return tok;
}

// javaTok extended with "..." token.

static List<String> javaTokPlusPeriod(String s) {
  List<String> tok = new ArrayList<String>();
  int l = s.length();
  
  int i = 0;
  while (i < l) {
    int j = i;
    char c; String cc;
    
    // scan for whitespace
    while (j < l) {
      c = s.charAt(j);
      cc = s.substring(j, Math.min(j+2, l));
      if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
        ++j;
      else if (cc.equals("/*")) {
        do ++j; while (j < l && !s.substring(j, Math.min(j+2, l)).equals("*/"));
        j = Math.min(j+2, l);
      } else if (cc.equals("//")) {
        do ++j; while (j < l && "\r\n".indexOf(s.charAt(j)) < 0);
      } else
        break;
    }
    
    tok.add(s.substring(i, j));
    i = j;
    if (i >= l) break;
    c = s.charAt(i); // cc is not needed in rest of loop body
    cc = s.substring(i, Math.min(i+2, l));

    // scan for non-whitespace
    if (c == '\'' || c == '"') {
      char opener = c;
      ++j;
      while (j < l) {
        if (s.charAt(j) == opener) {
          ++j;
          break;
        } else if (s.charAt(j) == '\\' && j+1 < l)
          j += 2;
        else
          ++j;
      }
    } else if (Character.isJavaIdentifierStart(c))
      do ++j; while (j < l && (Character.isJavaIdentifierPart(s.charAt(j)) || s.charAt(j) == '\'')); // for things like "this one's"
    else if (Character.isDigit(c))
      do ++j; while (j < l && Character.isDigit(s.charAt(j)));
    else if (cc.equals("[[")) {
      do ++j; while (j+1 < l && !s.substring(j, j+2).equals("]]"));
      j = Math.min(j+2, l);
    } else if (s.substring(j, Math.min(j+3, l)).equals("..."))
      j += 3;
    else
      ++j;

    tok.add(s.substring(i, j));
    i = j;
  }
  
  if ((tok.size() % 2) == 0) tok.add("");
  return tok;
}


  
  // Data files are immutable, use centralized cache
public static File DiskSnippetCache_getLibrary(long snippetID) throws IOException {
  File file = new File(getGlobalCache(), "data_" + snippetID + ".jar");
  return file.exists() ? file : null;
}

public static void DiskSnippetCache_putLibrary(long snippetID, byte[] data) throws IOException {
  saveBinaryFile(new File(getGlobalCache(), "data_" + snippetID).getPath() + ".jar", data);
}

static byte[] loadDataSnippetImpl(String snippetID) throws IOException {
  byte[] data;
  try {
    URL url = new URL("http://eyeocr.sourceforge.net/filestore/filestore.php?cmd=serve&file=blob_"
      + parseSnippetID(snippetID) + "&contentType=application/binary");
    System.err.println("Loading library: " + url);
    try {
      data = loadBinaryPage(url.openConnection());
    } catch (IOException e) {
      url = new URL("http://data.tinybrain.de/blobs/"
        + parseSnippetID(snippetID));
      System.err.println("Loading library: " + url);
      data = loadBinaryPage(url.openConnection());
    }
    System.err.println("Bytes loaded: " + data.length);
  } catch (FileNotFoundException e) {
    throw new IOException("Binary snippet #" + snippetID + " not found or not public");
  }
  return data;
}

  public static String loadTextFile(String fileName) {
    try {
      return loadTextFile(fileName, null);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String loadTextFile(String fileName, String defaultContents) throws IOException {
    if (!new File(fileName).exists())
      return defaultContents;

    FileInputStream fileInputStream = new FileInputStream(fileName);
    InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, "UTF-8");
    return loadTextFile(inputStreamReader);
  }
  
  public static String loadTextFile(File fileName) {
    try {
      return loadTextFile(fileName, null);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  public static String loadTextFile(File fileName, String defaultContents) throws IOException {
    try {
      return loadTextFile(fileName.getPath(), defaultContents);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String loadTextFile(Reader reader) throws IOException {
    StringBuilder builder = new StringBuilder();
    try {
      char[] buffer = new char[1024];
      int n;
      while (-1 != (n = reader.read(buffer)))
        builder.append(buffer, 0, n);
        
    } finally {
      reader.close();
    }
    return builder.toString();
  }

static byte[] loadBinaryPage(String url) throws IOException {
  return loadBinaryPage(new URL(url).openConnection());
}

public static byte[] loadBinaryPage(URLConnection con) throws IOException {
  //setHeaders(con);
  ByteArrayOutputStream buf = new ByteArrayOutputStream();
  InputStream inputStream = con.getInputStream();
  int n = 0;
  while (true) {
    int ch = inputStream.read();
    if (ch < 0)
      break;
    buf.write(ch);
    if (++n % 100000 == 0)
      System.err.println("  " + n + " bytes loaded.");
  }
  inputStream.close();
  return buf.toByteArray();
}


  /** writes safely (to temp file, then rename) */
  public static void saveBinaryFile(String fileName, byte[] contents) throws IOException {
    File file = new File(fileName);
    File parentFile = file.getParentFile();
    if (parentFile != null)
      parentFile.mkdirs();
    String tempFileName = fileName + "_temp";
    FileOutputStream fileOutputStream = new FileOutputStream(tempFileName);
    fileOutputStream.write(contents);
    fileOutputStream.close();
    if (file.exists() && !file.delete())
      throw new IOException("Can't delete " + fileName);

    if (!new File(tempFileName).renameTo(file))
      throw new IOException("Can't rename " + tempFileName + " to " + fileName);
  }

  static void saveBinaryFile(File fileName, byte[] contents) {
    try {
      saveBinaryFile(fileName.getPath(), contents);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  public static String join(String glue, Iterable<String> strings) {
    StringBuilder buf = new StringBuilder();
    Iterator<String> i = strings.iterator();
    if (i.hasNext()) {
      buf.append(i.next());
      while (i.hasNext())
        buf.append(glue).append(i.next());
    }
    return buf.toString();
  }
  
  public static String join(String glue, String[] strings) {
    return join(glue, Arrays.asList(strings));
  }
  
  public static String join(Iterable<String> strings) {
    return join("", strings);
  }
  
  public static String join(String[] strings) {
    return join("", strings);
  }


static String makeRandomID(int length) {
  Random random = new Random();
  char[] id = new char[length];
  for (int i = 0; i < id.length; i++)
    id[i] = (char) ((int) 'a' + random.nextInt(26));
  return new String(id);
}

static String structure(Object o) {
  return structure(o, 0);
}

// leave to false, unless unstructure() breaks
static boolean structure_allowShortening = false;
  
static String structure(Object o, int stringSizeLimit) {
  if (o == null) return "null";
  String name = o.getClass().getName();
  
  StringBuilder buf = new StringBuilder();
  
  if (o instanceof Collection) { // TODO: store the type (e.g. HashSet/TreeSet)
    for (Object x : (Collection) o) {
      if (buf.length() != 0) buf.append(", ");
      buf.append(structure(x, stringSizeLimit));
    }
    return "[" + buf + "]";
  }
  
  if (o instanceof Map) {
    for (Object e : ((Map) o).entrySet()) {
      if (buf.length() != 0) buf.append(", ");
      buf.append(structure(((Map.Entry) e).getKey(), stringSizeLimit));
      buf.append("=");
      buf.append(structure(((Map.Entry) e).getValue(), stringSizeLimit));
    }
    return "{" + buf + "}";
  }
  
  if (o.getClass().isArray()) {
    int n = Array.getLength(o);
    for (int i = 0; i < n; i++) {
      if (buf.length() != 0) buf.append(", ");
      buf.append(structure(Array.get(o, i), stringSizeLimit));
    }
    return "array{" + buf + "}";
  }

  if (o instanceof String)
    return quote(stringSizeLimit != 0 ? shorten((String) o, stringSizeLimit) : (String) o);
  
  // Need more cases? This should cover all library classes...
  if (name.startsWith("java.") || name.startsWith("javax."))
    return String.valueOf(o);
    
  String shortName = o.getClass().getName().replaceAll("^main\\$", "");
  
  int numFields = 0;
  String fieldName = "";
  if (shortName.equals("DynamicObject")) {
    shortName = (String) get(o, "className");
    Map<String, Object> fieldValues = (Map) get(o, "fieldValues");
    
    for (String _fieldName : fieldValues.keySet()) {
      fieldName = _fieldName;
      Object value = fieldValues.get(fieldName);
      if (value != null) {
        if (buf.length() != 0) buf.append(", ");
        buf.append(fieldName + "=" + structure(value, stringSizeLimit));
      }
      ++numFields;
   }
  } else {
    // regular class
    // TODO: go to superclasses too
    Field[] fields = o.getClass().getDeclaredFields();
    for (Field field : fields) {
      if ((field.getModifiers() & Modifier.STATIC) != 0)
        continue;
      Object value;
      try {
        field.setAccessible(true);
        value = field.get(o);
      } catch (Exception e) {
        value = "?";
      }
      
      fieldName = field.getName();
      
      // put special cases here...
  
      if (value != null) {
        if (buf.length() != 0) buf.append(", ");
        buf.append(fieldName + "=" + structure(value, stringSizeLimit));
      }
      ++numFields;
    }
  }
  
  String b = buf.toString();
  
  if (numFields == 1 && structure_allowShortening)
    b = b.replaceAll("^" + fieldName + "=", ""); // drop field name if only one
  String s = shortName;
  if (buf.length() != 0)
    s += "(" + b + ")";
  return s;
}

// works on lists and strings and null

static int indexOfIgnoreCase(Object a, Object b) {
  if (a == null) return -1;
  if (a instanceof String) {
     Matcher m = Pattern.compile((String) b, Pattern.CASE_INSENSITIVE + Pattern.LITERAL).matcher((String) a);
     if (m.find()) return m.start(); else return -1;
  }
  if (a instanceof List) {
    for (int i = 0; i < ((List) a).size(); i++) {
      Object o = ((List) a).get(i);
      if (o != null && ((String) o).equalsIgnoreCase((String) b))
        return i;
    }
    return -1;
  }
  throw fail("Unknown type: " + a);
}

static boolean isJavaIdentifier(String s) {
  if (s.length() == 0 || !Character.isJavaIdentifierStart(s.charAt(0)))
    return false;
  for (int i = 1; i < s.length(); i++)
    if (!Character.isJavaIdentifierPart(s.charAt(i)))
      return false;
  return true;
}

// currently finds only inner classes of class "main"
// returns null on not found
// this is the simple version that is not case-tolerant
static Class findClass(String name) {
  try {
    return Class.forName("main$" + name);
  } catch (ClassNotFoundException e) {
    return null;
  }
}

static Object nuObject(Class c, Object... args) { try {
 
  Constructor m = nuObject_findConstructor(c, args);
  m.setAccessible(true);
  return m.newInstance(args);

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

static Constructor nuObject_findConstructor(Class c, Object... args) {
  for (Constructor m : c.getDeclaredConstructors()) {
    if (!nuObject_checkArgs(m.getParameterTypes(), args, false))
      continue;
    return m;
  }
  throw new RuntimeException("Constructor with " + args.length + " matching parameter(s) not found in " + c.getName());
}

 static boolean nuObject_checkArgs(Class[] types, Object[] args, boolean debug) {
    if (types.length != args.length) {
      if (debug)
        System.out.println("Bad parameter length: " + args.length + " vs " + types.length);
      return false;
    }
    for (int i = 0; i < types.length; i++)
      if (!(args[i] == null || isInstanceX(types[i], args[i]))) {
        if (debug)
          System.out.println("Bad parameter " + i + ": " + args[i] + " vs " + types[i]);
        return false;
      }
    return true;
  }

static File getGlobalCache() {
  File file = new File(userHome(), ".tinybrain/snippet-cache");
  file.mkdirs();
  return file;
}


static Object process(String processorID, Object in) {
  return process(processorID, in, "in");
}

static Object process(String processorID, Object in, String outVar) {
  try {
    Class processor = hotwire(processorID);
    set(processor, "in", in);
    call(processor, "main", new Object[] {new String[0]});
    return get(processor, outVar);
  } catch (Exception e) {
    throw new RuntimeException("Error in #" + parseSnippetID(processorID), e);
  }
}

  /** writes safely (to temp file, then rename) */
  public static void saveTextFile(String fileName, String contents) throws IOException {
    File file = new File(fileName);
    File parentFile = file.getParentFile();
    if (parentFile != null)
      parentFile.mkdirs();
    String tempFileName = fileName + "_temp";
    if (contents != null) {
      FileOutputStream fileOutputStream = new FileOutputStream(tempFileName);
      OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream, "UTF-8");
      PrintWriter printWriter = new PrintWriter(outputStreamWriter);
      printWriter.print(contents);
      printWriter.close();
    }
    
    if (file.exists() && !file.delete())
      throw new IOException("Can't delete " + fileName);

    if (contents != null)
      if (!new File(tempFileName).renameTo(file))
        throw new IOException("Can't rename " + tempFileName + " to " + fileName);
  }
  
  public static void saveTextFile(File fileName, String contents) {
    try {
      saveTextFile(fileName.getPath(), contents);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }


  static Object call(Object o, String method, Object... args) {
    try {
      if (o instanceof Class) {
        Method m = call_findStaticMethod((Class) o, method, args, false);
        m.setAccessible(true);
        return m.invoke(null, args);
      } else {
        Method m = call_findMethod(o, method, args, false);
        m.setAccessible(true);
        return m.invoke(o, args);
      }
    } catch (Exception e) {
      throw e instanceof RuntimeException ? (RuntimeException) e : new RuntimeException(e);
    }
  }

  static Method call_findStaticMethod(Class c, String method, Object[] args, boolean debug) {
    Class _c = c;
    while (c != null) {
      for (Method m : c.getDeclaredMethods()) {
        if (debug)
          System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
        if (!m.getName().equals(method)) {
          if (debug) System.out.println("Method name mismatch: " + method);
          continue;
        }

        if ((m.getModifiers() & Modifier.STATIC) == 0 || !call_checkArgs(m, args, debug))
          continue;

        return m;
      }
      c = c.getSuperclass();
    }
    throw new RuntimeException("Method '" + method + "' (static) with " + args.length + " parameter(s) not found in " + _c.getName());
  }

  static Method call_findMethod(Object o, String method, Object[] args, boolean debug) {
    Class c = o.getClass();
    while (c != null) {
      for (Method m : c.getDeclaredMethods()) {
        if (debug)
          System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
        if (m.getName().equals(method) && call_checkArgs(m, args, debug))
          return m;
      }
      c = c.getSuperclass();
    }
    throw new RuntimeException("Method '" + method + "' (non-static) with " + args.length + " parameter(s) not found in " + o.getClass().getName());
  }

  private static boolean call_checkArgs(Method m, Object[] args, boolean debug) {
    Class<?>[] types = m.getParameterTypes();
    if (types.length != args.length) {
      if (debug)
        System.out.println("Bad parameter length: " + args.length + " vs " + types.length);
      return false;
    }
    for (int i = 0; i < types.length; i++)
      if (!(args[i] == null || isInstanceX(types[i], args[i]))) {
        if (debug)
          System.out.println("Bad parameter " + i + ": " + args[i] + " vs " + types[i]);
        return false;
      }
    return true;
  }



  static void set(Object o, String field, Object value) {
    if (o instanceof Class) set((Class) o, field, value);
    else try {
      Field f = set_findField(o.getClass(), field);
      f.setAccessible(true);
      f.set(o, value);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  
  static void set(Class c, String field, Object value) {
    try {
      Field f = set_findStaticField(c, field);
      f.setAccessible(true);
      f.set(null, value);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  
  static Field set_findField(Class<?> c, String field) {
    for (Field f : c.getDeclaredFields())
      if (f.getName().equals(field))
        return f;
    throw new RuntimeException("Field '" + field + "' not found in " + c.getName());
  }
  
  static Field set_findStaticField(Class<?> c, String field) {
    for (Field f : c.getDeclaredFields())
      if (f.getName().equals(field) && (f.getModifiers() & Modifier.STATIC) != 0)
        return f;
    throw new RuntimeException("Static field '" + field + "' not found in " + c.getName());
  }

static boolean isInteger(String s) {
  return Pattern.matches("\\-?\\d+", s);
}

static Object get(Object o, String field) {
  if (o instanceof Class) return get((Class) o, field);
  try {
    Field f = get_findField(o.getClass(), field);
    f.setAccessible(true);
    return f.get(o);
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}

static Object get(Class c, String field) {
  try {
    Field f = get_findStaticField(c, field);
    f.setAccessible(true);
    return f.get(null);
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}

static Field get_findStaticField(Class<?> c, String field) {
  for (Field f : c.getDeclaredFields())
    if (f.getName().equals(field) && (f.getModifiers() & Modifier.STATIC) != 0)
      return f;
  throw new RuntimeException("Static field '" + field + "' not found in " + c.getName());
}

static Field get_findField(Class<?> c, String field) {
  for (Field f : c.getDeclaredFields())
    if (f.getName().equals(field))
      return f;
  throw new RuntimeException("Field '" + field + "' not found in " + c.getName());
}

  // compile JavaX source, load classes & return main class
  // src can be a snippet ID or actual source code
  
  static Class<?> hotwire(String src) {
    try {
      Class j = getJavaX();
      
      synchronized(j) { // hopefully this goes well...
        List<File> libraries = new ArrayList<File>();
        File srcDir = (File) call(j, "transpileMain", src, libraries);
        if (srcDir == null)
          fail("transpileMain returned null (src=" + quote(src) + ")");
        
        Object androidContext = get(j, "androidContext");
        if (androidContext != null)
          return (Class) call(j, "loadx2android", srcDir, src);
          
        File classesDir = (File) call(j, "TempDirMaker_make");
        String javacOutput = (String) call(j, "compileJava", srcDir, libraries, classesDir);
        System.out.println(javacOutput);
        
        URL[] urls = new URL[libraries.size()+1];
        urls[0] = classesDir.toURI().toURL();
        for (int i = 0; i < libraries.size(); i++)
          urls[i+1] = libraries.get(i).toURI().toURL();
  
        // make class loader
        URLClassLoader classLoader = new URLClassLoader(urls);
    
        // load & return main class
        Class<?> theClass = classLoader.loadClass("main");
        
        call(j, "setVars", theClass, isSnippetID(src) ? src: null);
        
        if (isSnippetID(src))
          callOpt(j, "addInstance", src, theClass);
  
        return theClass;
      }
    } catch (Exception e) {
      throw e instanceof RuntimeException ? (RuntimeException) e : new RuntimeException(e);
    }
  }

static Class __javax;

static Class getJavaX() {
  return __javax;
}

  public static boolean isSnippetID(String s) {
    try {
      parseSnippetID(s);
      return true;
    } catch (RuntimeException e) {
      return false;
    }
  }

static String firstToUpper(String s) {
  if (s.length() == 0) return s;
  return Character.toUpperCase(s.charAt(0)) + s.substring(1);
}

static <A> ArrayList<A> asList(A[] a) {
  return new ArrayList<A>(Arrays.asList(a));
}

static ArrayList<Integer> asList(int[] a) {
  ArrayList<Integer> l = new ArrayList<Integer>();
  for (int i : a) l.add(i);
  return l;
}

static <A> ArrayList<A> asList(Set<A> s) {
  return new ArrayList<A>(s);
}

static long startTiming_startTime;
static void startTiming() {
  startTiming_startTime = now();
}

static void stopTiming() {
  long end = now();
  print("Time: " + (end-startTiming_startTime) + " ms");
}
}