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!7

set flag DynModule. // for transpilation

set flag dm_evalJava_withModule_debug.
set flag veryQuickJava3_debug.

cmodule2 GazelleMultiBot > DynGazelleBot {
  switchable int maxEvalResultLength = oneMegabyte_int();
  switchable double evalTimeout = 30.0;
  switchable long botProcessed; // timestamp of last post processed by bots
  switchable int maxBotAnswerLength = 100000;
  transient new L<Bot> bots;
  Map<Long, GazellePost> allPosts = syncTreeMap();
  transient Map<Long, O> loadedCodePosts = syncTreeMap();
  transient new O couldntLoadCode;

  transient Lock codeLoadLock = lock();

  set flag NoNanoHTTPD.
  !include #1029545 // API for Eleu

  class Bot {
    S name;
    
    *() {}
    *(S *name) {}
    *(S *name, IVF1<GazellePost> *handlePost) {}
    
    swappable void handlePost(GazellePost post) {}
    
    GazelleBotCred cred() { ret GazelleBotCred(_user, _botToken, name); }
    
    void postReply(GazellePost post, S text, S type, S title default null) {
      gazelle_createPost(cred(), text, type, refs := post.id, +title);
    }
  }

  srecord CreatePost(L params) {}
  
  start {
    dm_useLocalMechListCopies();
    
    grabLoop.handlePosts = posts -> {
      dm_mediumRefreshTranspiler();
      
      grabLoop.handlePosts_base(posts);
      
      for (GazellePost post : posts)
        setField(botProcessed := max(botProcessed, post.modified));
    };
    
    // legacy conversion to sort allPosts
    setField_noCheck(allPosts := asSyncTreeMap(allPosts));

    bots.add(new Bot("Math Bot", post -> {
      if (post.creating) ret;
      gazelle_mathBot1_handlePost_2(_user, _botToken, post);
    }));
    
    bots.add(new Bot("Code Safety Checker") {
      void handlePost(GazellePost post) {
        if (post.creating) ret;
        if (eqic(post.type, "JavaX Code"))
          gazelle_createPost(cred(), codeSafetyCheckResult(post.text), "Code Safety", refs := post.id);
      }
    });
    
    bots.add(new Bot("Safe Code Runner") {
      void handlePost(GazellePost post) {
        if (post.creating) ret;
        if (eqic(post.type, "JavaX Code")) {
          S code = post.text;
          if (isCodeSafe(code)) {
            code = prepareCode(code, post);
            //S out = shorten(maxEvalResultLength, runCode(code));
            S text, type = "Code Result", title = "";
            try {
              O result = evalCode(code, post);
              if (result cast CreatePost) {
                O[] params = toObjectArray(result.params);
                text = (S) optPar text(params);
                type = (S) optPar type(params, type);
                title = (S) optPar title(params);
              } else
                text = str_shortenSynthetic(result);
            } catch print e {
              text = getStackTrace(e);
            }
            gazelle_createPost(cred(), text, type, +title, refs := post.id);
          }
        }
      }
    });
    
    bots.add(new Bot("Run Code On All Posts") {
      void handlePost(GazellePost post) {
        if (post.creating) ret;
        if (eqic(post.type, "Instruction") && match("Please run this code on all posts", post.text)) {
          long ref = gazelle_firstPostRef(post.id);
          if (ref == 0) ret;
          
          S code = gazelle_text(ref);
          if (!isCodeSafe(code)) ret;
          
          S code2 = "ret func(S post) { " + code + " };";
          O function = evalCode(code2);
          
          new LS lines;
          S out = shorten(maxEvalResultLength, runCode(code));
          for (GazellePost post2 : cloneValues(allPosts)) {
            lines.add("Post " + post2.id + " (" + quote(shorten(20, post2.text)) + "): " + shorten(80, runFunc(() -> callF(function, post2.text))));
          }

          gazelle_createPost(cred(), lines(lines), "Code Result", refs := post.id);
        }
      }
    });
    
    bots.add(new Bot("Mark identifiers safe") {
      void handlePost(GazellePost post) {
        if (post.creating) ret;
        if (/*eqic(post.type, "Instruction")
          &&*/ post.creator.isMaster
          && match("Mark safe", post.text)) {
          S text = getPost(first(post.postRefs)).text;
          LS ids = tok_identifiersInOrder(regexpFirstGroupIC("Unknown identifiers: (.+)", text));
          print("Marking safe: " + ids);
          postReply(post, markSafe(ids), "Marked safe");
        }
      }
    });
    
    bots.add(new Bot("Post Deleter") {
      void handlePost(GazellePost post) {
        if (post.creating) ret;
        if (eqic(post.type, "Instruction")
          && post.creator.isMaster
          && match("Delete mentioned posts", post.text)) {
            long ref = gazelle_firstPostRef(post.id);
            if (ref == 0) ret;
            S text = gazelle_text(ref);
            L<Long> postIDs = allToLong(regexpAllFirstGroups(gazelle_postMentionRegexp(), text));
            print("Deleting posts: " + postIDs);
            if (nempty(postIDs)) {
              Map result = gazelle_deletePosts(cred(), postIDs);
              postReply(post, str(result), "Deletion result");
            } else
              postReply(post, "No mentioned posts found", "Deletion result");
        }
      }
    });
    
    bots.add(new Bot("Detector Runner") {
      void handlePost(GazellePost post) {
        if (post.creating) ret;
        ret unless eqic(post.type, "Instruction")
          && match("Please run detector", post.text);
          
        try {
          long detectorID = post.refWithTagOrFail("detector");
          long posExamplesID = post.refWithTagOrFail("positive examples");
          long negExamplesID = post.refWithTagOrFail("negative examples");
        
          S code = getPost(detectorID).text;
          LS posExamples = tlft(getPost(posExamplesID).text);
          LS negExamples = tlft(getPost(negExamplesID).text);
          LPair<S, Bool> examples = trueFalseBPairs(posExamples, negExamples);
          if (!isCodeSafe(code)) fail("Detector code not safe");
  
          IF1<S, O> detector = proxy IF1(evalCode(code));
          new LS good;
          new LS bad;
          new Scorer scorer;
          long time = sysNow();
          evalWithTimeoutOrFail(evalTimeout, r {
            for (Pair<S, Bool> example : examples) {
              S result = runFunc(() -> detector.get(example.a));
              bool ok = eq(result, str(example.b));
              scorer.add(ok);
              S line = (ok ? "OK" : example.b ? "False negative" : "False positive")
                  + " (" + shorten(10, result) + "): " + example.a;
              (ok ? good : bad).add(line);
            }
          });            
          time = sysNow()-time;

          S text = "Detector code:\n\n" + indentx(code) + "\n\n"
            + n2(good, "correct answer") + ", " + n2(bad, "bad answer") + ". Runtime: " + n2(time) + " ms\n\n"
            + or2(trim(lines(concatLists(bad, ll(""), good))), "No errors");
          S title = "Score for detector " + detectorID + ": " + scorer;
          
          gazelle_createPost(cred(), text, "Detector Score", +title,
            refs := joinWithSpace(ll(post.id, detectorID, posExamplesID, negExamplesID)),
            refTags := linesLL_rtrim("", "detector", "positive examples", "negative examples"));
        } catch e {
          postReply(post, getStackTrace(e), "Error");
        }
      }
    });
  }
  
  void handlePost(GazellePost post) {
    allPosts.put(post.id, post);
    change();
    loadedCodePosts.remove(post.id);
    if (post.modified > botProcessed) {
      print("modified: " + post.modified + "/" + botProcessed);
      for (Bot bot : bots) pcall {
        bot.handlePost(post);
      }
    }
  }

  // if post != null, store transpilation
  O evalCode(S code, GazellePost post default null) {
    printWithIndent("CODE> ", code);
    veryQuickJava_transpiled.set(post != null ? "" : null); // request transpilation
    try {
      ret dm_javaEvalWithTimeout(evalTimeout, code);
    } finally {
      if (post != null) {
        S java = veryQuickJava_transpiled!;
        print("Transpilation for " + post.id + ": " + shorten(java));
        saveTextFile(transpilationFile(post.id), nullOnEmpty(java));
      }
    }
  }

  // assumes code is safety-checked
  S runCode(S code) {
    printWithIndent("CODE> ", code);
    ret runFunc(() -> str_shortenSynthetic(dm_javaEval(code)));
  }

  // run IF0 with timeout, exception to string, convert result to string
  S runFunc(IF0 f) {
    ret str_shortenSynthetic(evalWithTimeoutOrException(evalTimeout, func {
      try {
        ret str_shortenSynthetic(f!);
      } catch e {
        ret getStackTrace(e);
      }
    }));
  }
  
  L<GazellePost> repliesTo(GazellePost post) {
    ret filter(values(allPosts), p -> contains(p.postRefs, post.id));
  }
  
  L<GazellePost> repliesWithTag(GazellePost post, S tag) {
    Pair<Long, S> pair = pair(post.id, upper(tag));
    ret filter(repliesTo(post), p -> contains(mapPairsB toUpper(p.taggedRefs()), pair));
  }
  
  GazellePost getPost(long id) {
    ret allPosts.get(id);
  }
  
  S getPostText(long id) {
    ret getPost(id).text;
  }
  
  Cl<GazellePost> getAllPosts() {
    ret values(allPosts);
  }

  CreatePost createPost(O... _) {
    ret new CreatePost(asList(_));
  }
  
  CodeSafetyChecker codeSafetyChecker() {
    new CodeSafetyChecker checker;
    checker.init();
    checker.markSafe("getAllPosts");
    ret checker;
  }
  
  S codeSafetyCheckResult(S code) {
    CodeSafetyChecker checker = codeSafetyChecker();
    checker.checkCode(code);
    ret checker.verbalCheckResult();
  }
  
  bool isCodeSafe(S code) {
    CodeSafetyChecker checker = codeSafetyChecker();
    checker.checkCode(code);
    ret checker.isSafe();
  }

  S prepareCode(S code, GazellePost post) {
    code = tok_addReturn(code);
    
    // define implicit vars and functions

    // post = text of parent post
    if (containsJavaToken(code, "post")) {
      long ref = gazelle_firstPostRef(post.id);
      if (ref != 0)
        code = "S post = " + quote(gazelle_text(ref)) + ";\n" + code;
    }
    
    // post = text of grandparent post
    if (containsJavaToken(code, "post2")) {
      long ref = gazelle_firstPostRef(gazelle_firstPostRef(post.id));
      if (ref != 0)
        code = "S post2 = " + quote(gazelle_text(ref)) + ";\n" + code;
    }
    
    if (containsJavaToken(code, "getAllPosts"))
      code = [[
        embedded Cl<GazellePost> getAllPosts() {
          ret (Cl) quickImport(dm_call(dm_current_generic(), "getAllPosts"));
        }
      ]] + code;

    if (containsJavaToken(code, "createPost"))
      code = [[
        embedded O createPost(O... _) {
          ret dm_call(dm_current_generic(), "createPost", _);
        }
      ]] + code;

    // optimize gazelle_text
    if (containsJavaToken(code, "gazelle_text")) {
      code = [[
        embedded S gazelle_text(long id) {
          ret (S) dm_call(dm_current_generic(), "getPostText", id);
        }
      ]] + code;
    }
    
    ret code;
  }

  O html(IWebRequest req) {
    new Matches m;
    
    if (startsWith(req.uri(), "/chatBotReply/", m) && isInteger(m.rest())) {
      long postID = parseLong(m.rest());
      GazellePost post = getPost(postID);
      if (post == null) ret serve404("Post " + postID + " not found");
      O code = codeForPost(post);
      if (code == couldntLoadCode) ret serve500("Couldn't load code for post");
      S q = req.params().get("q"); // user input
      if (empty(q)) ret "";
      ret serveJSON(litorderedmap(answer := shorten(maxBotAnswerLength, evalWithTimeoutOrFail(evalTimeout,
        () -> strOrEmpty(callF(code, q))))));
    }
    
    if (startsWith(req.uri(), "/transpilation/", m) && isInteger(m.rest())) {
      long postID = parseLong(m.rest());
      GazellePost post = getPost(postID);
      if (post == null) ret serve404("Post " + postID + " not found");
      S src = loadTextFile(transpilationFile(post.id));
      if (empty(src))
        src = "No transpilation found for post " + postID + "." + 
          (!post.isJavaXCode() ? "Code is not a code post." : "Please try \"Touch post\" and wait a few seconds");
      else pcall {
        src = javaPrettyPrint(src);
      }
      ret serveText(src);
    }
    ret "Bot here";
  }

  O codeForPost(GazellePost post) {
    lock codeLoadLock;
    O code = loadedCodePosts.get(post.id);
    if (code == null) {
      try {
        S codeText = post.text;
        if (!isCodeSafe(codeText)) fail("Code is not safe");
        codeText = prepareCode(codeText, null);
        code = evalCode(codeText, post);
      } catch print e {
        code = couldntLoadCode;
      }
      loadedCodePosts.put(post.id, code);
    }
    ret code;
  }

  File transpilationFile(long postID) {
    ret programFile("Post-Transpilations/" + postID + ".java");
  }
}