import net.dv8tion.jda.core.events.Event;

import net.dv8tion.jda.core.events.user.update.*;

asclass DynTalkBot2<A extends DynTalkBot2.ByServer> extends DynServerAwareDiscordBot<A> {

  switchable S myName = "Anonymous bot";

  transient bool useAGIBlueForDropPunctuation = true;

  transient bool preprocessAtSelfToMyName = true;

  transient bool dropPunctuation = true;

  transient bool ngbCommands = true;

  //transient bool perGuildAuth; // implementing

  L<Long> authorizedUsers = ll(547706854680297473); // stefan

  srecord ISaid(long channelID, long date, S text) {}

  void init {

    super.init();

    onPostedInChannel.add((channel, msg) -> {

      if (channel cast Channel) {

        Guild guild = channel.getGuild();

        if (guild == null) ret;

        ByServer bs = getByServer(guild);

        long channelID = channel.getIdLong();

        mapPut(bs.lastSaidInChannel, channelID, nu ISaid(+channelID, text := msg));

        change();

      }

    });

    // We leave it as null to force subclasses to set this

    // (avoids serializing bad instances)

    // makeByServer = () -> (A) new ByServer;

    dm_vmBus_onMessage_q discordGuildJoin(voidfunc(Map map) {

      ret unless map.get('module) == module();

      print("Got join");

      getByServer(getLong guildID(map), true)

        .onUserJoin(getLong userID(map), map);

    });

    onDiscordEvent(e -> {

      //print("Generic Discord event: " + e);

      if (e cast UserUpdateOnlineStatusEvent)

        getByServer(e.getGuild()).onOnlineStatusChange(e);

    });

  }

  class ByServer extends DynServerAwareDiscordBot.ByServer {

    L<Long> guildAuthorizedUsers;

    Map<Long, ISaid> lastSaidInChannel = synchroMap();

    DynTalkBot2 m2() { ret DynTalkBot2.this; } // for debugging

    // overridable

    void onUserJoin(long userID, O... _) {}

    void onOnlineStatusChange(UserUpdateOnlineStatusEvent e) {}

    @Override S answer(S input, Map map) {

      try answer super.answer(input, map); // server-aware stuff

      S answer = processLine(input, map);

      ret answer;

    }

    S dropMyPrefixOrNull(S s) {

      S sOld = s;

      s = dropPrefixICTrim_orNull(myPrefix(), s);

      if (s == null)

        print("no got prefix: " + quote(myPrefix()) + " / " + quote(sOld));

      ret s;

    }

    S processLine(S s, O... _) {

      s = preprocess(s, _);

      ret processSimplifiedLine(s, _);

    }

    S preprocess(S s, O... _) {

      print("Preprocessing: " + s);

      //pcall { print("mother: " + DynTalkBot2.this); }

      if (preprocessAtSelfToMyName && discordBotID != 0)

        s = replace(s, atSelf(), " " + myName + " ");

      if (dropPunctuation)

        s = dropPunctuation3_withAGIBlue(useAGIBlueForDropPunctuation, s);

      s = trim(simpleSpaces_noTok(s));

      print("simplified >> " + quote(s));

      ret s;

    }

    S myPrefix() {

      ret preprocessAtSelfToMyName ?

        (endsWithLetterOrDigit(myName) ? myName + " " : myName) :

        (dropPunctuation ? replace(atSelf(), "@", "") /* @ is killed by preprocessing */ : atSelf()) + " ";

    }

    // extend me

    S processSimplifiedLine(S input, O... _) {

      new Matches m;

      input = dropMyPrefixOrNull(input);

      if (input == null) null;

      if (ngbCommands) {

        if (eqicOneOf(input, "support channel", "support server", "support"))

          ret "Get support for me here: " + nextGenBotsDiscordInvite();

        if (eqicOneOf(input, "source", "sources", "source code"))

          ret snippetLink(programID());

      }

      if (swic_trim(input, "add master ", m)) {

        try answer checkAuth(_);

        setAdd(authorizedUsers, parseFirstLong(m.rest()));

        change();

        ret "Okidoki. Have " + n2(l(authorizedUsers), "master");

      }

      if (eqic(input, "masters"))

        ret empty(authorizedUsers) ? "I have no masters." : "My masters are: " + joinWithComma(map discordAtPlusID(authorizedUsers));

      if (swic_trim(input, "delete master ", m)) {

        try answer checkAuth(_);

        remove(authorizedUsers, parseFirstLong(m.rest()));

        change();

        ret "Okidoki. Have " + n2(l(authorizedUsers), "master");

      }

      if (eqic(input, "guild count")) {

        try answer checkAuth(_);

        ret renderGuildCount();

      }

      if (eqic(input, "guild names")) {

        try answer checkAuth(_);

        ret renderGuildNames();

      }

      null;

    }

    S renderGuildCount() {

      ret "Total guilds joined: " + guildCount + ". Live guilds: " + liveGuildCount();

    }

    S renderGuildNames() {

      ret lines(map(discord.getGuilds(), g -> g.getName()));

    }

    bool authed(O... _) {

      ret contains(authorizedUsers, optPar userID(_));

    }

    S checkAuth(O... _) {  

      long userID = longPar userID(_);

      bool result = authed(_);

      print("Auth-checking user ID: " + userID + " => " + result);

      if (!result) ret "You are not authorized";

      null;

    }

    S guildStructure() {

      ret structure_nullingInstancesOfClass(_getClass(module()), this);

    }

  } // end of class ByServer

  S serveGuildBackup(MessageChannel channel, Guild guild, S data) {

    if (guild == null) ret "Do this in a guild";

    if (containsDiscordToken(data)) ret "DISCORD TOKEN EXPOSED ALARM!! NOTIFY ADMINISTRATOR";

    S baseName = urlencode(jda_selfUserName(discord))

      + "-" + guild.getIdLong() + "-" + ymd_minus_hms();

    S zipName = baseName + ".zip";

    File zip = programFile("backups/" + zipName);

    createZipFileWithSingleTextFile(zip, baseName + ".txt", data);

    channel.sendMessage("Here's my latest brain contents for this guild.").addFile(zip).queue();

    null;

  }

  // use structure() on ByServer

  S serveGuildBackup(MessageChannel channel, Guild guild, ByServer bs) {

    ret serveGuildBackup(channel, guild, bs.guildStructure());

  }

  // e.g. for help texts

  S atSelfOrMyName() {

    ret preprocessAtSelfToMyName ? myName : atSelf();

  }

}