!747

m {
  static new Map<S, S> cache; // "122" (or "t123") to md5
  static long lastUpdate;
  
  p {
    readLocally("cache lastUpdate");
    Android3 android = new Android3("Boss Bot.");
    android.startPort = 4990;
    makeAndroid3(android);
  }
  
  static synchronized S answer(S s) {
    new Matches m;
    
    if (match3("get cache size", s))
      return cache.size() + " entries";
      
    if (match3("when was your last update", s))
      return "" + lastUpdate;
      
    if (match3("please update", s)) {
      update();
      return "OK, done.";
    }
    
    if (match3("get md5 of *", s, m)) {
      S md5 = cache.get("" + parseSnippetID(unquote(m.m[0])));
      return md5 != null ? format3("MD5: *", md5) : "Snippet not found.";
    }
    
    if (match3("get text of *", s, m) || match3("get text for *", s, m)) {
      S snippetID = "" + parseSnippetID(unquote(m.m[0]));
      S md5 = cache.get(snippetID);
      if (md5 == null) ret "Snippet not found.";
      S text = "";
      if (!md5.equals("-"))
        text = loadText(snippetID, md5);
      ret format3("Text: *", text);
    }
    
    if (match3("get transpilation of *", s, m) || match3("get transpilation for *", s, m)) {
      S snippetID = "t" + parseSnippetID(unquote(m.m[0]));
      S md5 = cache.get(snippetID);
      if (md5 == null) ret "Transpilation not found.";
      S text = "";
      if (!md5.equals("-"))
        text = loadText(snippetID, md5);
      ret format3("Text: *", text);
    }
    
    ret null;
  }
  
  static synchronized void update() {
    S s = loadPage("http://tinybrain.de:8080/tb-int/all-md5s.php?withtranspiled=1");
    cache.clear();
    for (S line : toLinesFullTrim(s)) {
      S[] tok = line.split(":");
      if (tok.length != 2)
        fail("huch: " + structure(tok));
      S snippetID = tok[0];
      S md5 = tok[1];
      cache.put(snippetID, md5);
    }
    saveLocally("cache");
    lastUpdate = now();
    saveLocally("lastUpdate");
  }
  
  static File getTextFile(S snippetID, S md5) {
    return new File(programDir(), snippetID + "-" + md5 + ".txt");
  }
  
  static synchronized S loadText(S snippetID, S md5) {
    File f = getTextFile(snippetID, md5);
    if (f.exists()) return loadTextFile(f);
    S text = loadTextFromSite(snippetID, md5);
    saveTextFile(f, text);
    return text;
  }
  
  static S loadTextFromSite(S snippetID, S md5) {
    S url;
    if (snippetID.startsWith("t"))
      url = "http://tinybrain.de:8080/tb-int/get-transpiled.php?raw=1&withlibs=1&id=" + snippetID.substring(1);
    else
      url = "http://tinybrain.de:8080/tb/get-version-raw.php?id=" + parseSnippetID(snippetID) + "&md5=" + urlencode(md5);
    
    // TODO: try a few times :)
    return loadPage(url);
  }
}