!747

m {
  static new MultiMap<S, S> map;
  static boolean fancyOpening = true;
  static float mirrorChance = 0.0f; // 0.1f;
  
  !include #1001296 // MultiMap
  
  p {
    readLocally("map");
    makeAndroid3("Leo Bot at " + getComputerID() + ".");
  }
  
  static S lookup(S s) {
    L<S> results = map.get(s);
    if (results.isEmpty()) return s;
    return new Random().nextFloat() <= mirrorChance ? s : oneOf(results);
  }
  
  static synchronized S answer(S input, L<S> history) {
    if (input.startsWith("!")) {
      history = (L) unstructure(input.substring(1));
      input = history.get(history.size()-1);
    }

    if (history.size() == 1) { // ignore contents of first line actually
      S output = "hallo";
      if (fancyOpening)
        output = lookup(output);
      return output;
    } else {
      S ninput = normalize(input);
      S lastInput = history.size() >= 3 ? normalize(history.get(history.size()-3)) : null;
      S lastOutput = normalize(history.get(history.size()-2));
      
      // inner/cross learning algorithm
      
      map.put(lastOutput, ninput);
      if (lastInput != null && !lastInput.equals(lastOutput))
        map.put(lastInput, ninput);
        
      saveLocally("map");
      return lookup(input);
    }
  }
  
  static S normalize(S s) {
    //L<S> tok = dropPunctuation(javaTok(s));
    // TODO
    return s.intern();
  }
}