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!7

set flag DynModule. // for transpilation

cmodule2 GazelleMultiBot > DynGazelleBot {
  switchable int maxEvalResultLength = oneMegabyte_int();
  switchable double evalTimeout = 60.0;
  switchable long botProcessed; // timestamp of last post processed by bots
  transient new L<Bot> bots;
  Map<Long, GazellePost> allPosts = syncTreeMap();

  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) {
      gazelle_createPost(cred(), text, type, refs := post.id);
    }
  }
  
  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 = tok_addReturn(code);
            
            // define implicit vars and functions
            
            if (containsJavaToken(code, "post")) {
              long ref = gazelle_firstPostRef(post.id);
              if (ref != 0)
                code = "S post = " + quote(gazelle_text(ref)) + ";\n" + code;
            }
            
            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;

            printWithIndent("CODE> ", code);
            
            S out = shorten(maxEvalResultLength, runCode(code));
            gazelle_createPost(cred(), out, "Code Result", 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 = dm_javaEval(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));
            } else
              postReply(post, "No mentioned posts found");
        }
      }
    });
    
  }
  
  void handlePost(GazellePost post) {
    allPosts.put(post.id, post);
    change();
    if (post.modified > botProcessed) {
      print("modified: " + post.modified + "/" + botProcessed);
      for (Bot bot : bots) pcall {
        bot.handlePost(post);
      }
    }
  }

  // assumes code is safety-checked
  S runCode(S code) {
    ret runFunc(() -> str_shortenSynthetic(dm_javaEval(code)));
  }
  
  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);
  }
  
  Cl<GazellePost> getAllPosts() {
    ret values(allPosts);
  }
  
  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();
  }
}