// The online bot LOVES to be online.

!747

m {

  // -1, 0, +1

  static new AtomicInteger online;

  static new AtomicLong nextCheck;

  static S lastProblem;

  p {

    makeAndroid("Online bot! " + getStatus(), stringfunc { answer(s) });

    while (true) {

      check();

      long seconds = online.get() > 0 ? 60 : 2;

      nextCheck.set(now() + seconds*1000);

      sleep(Math.max(nextCheck.get()-now(), 0));

    }

  }

  // We should add a timeout I guess? Although, if actually offline,

  // it doesn't block, so it's probably ok unless the net or the

  // server is currently very slow.

  static synchronized void check() {

    int oldValue = online.get();

    Throwable problem = checkIfHttpServerIsOnline("tinybrain.de");

    int value = problem == null ? 1 : -1;

    if (problem == null)

      lastProblem = null;

    else if (!problem.toString().equals(lastProblem)) {

      print(problem);

      lastProblem = problem.toString();

    }

    online.set(value);

    if (value != oldValue)

      print(getStatus());

  }

  static synchronized S answer(S s) {

    if (match3("are we online?", s))

      return getStatus();

    if (match3("check again", s)) {

      print("Checking...");

      check();

      return getStatus();

    }

    return null;

  }

  static S getStatus() {

    int i = online.get();

    long checkSeconds = (nextCheck.get()-now())/1000;

    S checkTime = checkSeconds >= 0 ? "(Next check in " + checkSeconds + " seconds.)" : "";

    if (i < 0) return "We are: OFFLINE. " + checkTime;

    else if (i > 0) return "We are: ONLINE. " + checkTime;

    else return "Online status check in progress.";

  }

}