/*
  Copyright (C) 2019-2025  Selwin van Dijk

  This file is part of signalbackup-tools.

  signalbackup-tools is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  signalbackup-tools is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with signalbackup-tools.  If not, see <https://www.gnu.org/licenses/>.
*/

#include "signalbackup.ih"
#include "htmlicontypes.h"

std::string SignalBackup::decodeStatusMessage(std::string const &body, long long int expiration, long long int type, std::string const &contactname, IconType *icon) const
{

  // std::cout << "DECODING: " << std::endl << "  " << body << std::endl << "  " << expiration << std::endl
  //           << "  " << type << std::endl << "  " << contactname << std::endl;
  // std::cout << Types::isGroupUpdate(type) << std::endl;
  // std::cout << Types::isGroupV2(type) << std::endl;


  // old style group updates (v1)
  if (Types::isGroupUpdate(type) && !Types::isGroupV2(type))
  {
    if (Types::isOutgoing(type))
      return "You updated the group.";

    std::string result = contactname + " updated the group.";

    GroupContext statusmsg(body);

    std::string members;
    auto field4 = statusmsg.getField<4>();
    if (field4.size())
    {
      for (unsigned int k = 0; k < field4.size(); ++k)
      {
        // get name from members string
        SqliteDB::QueryResults res;
        if (d_database.containsTable("recipient")) [[likely]] // dbv >= 24
          d_database.exec("SELECT COALESCE(" + (d_database.tableContainsColumn("recipient", "nickname_joined_name") ? "NULLIF(recipient.nickname_joined_name, ''),"s : ""s) +
                          "NULLIF(recipient." + d_recipient_system_joined_name + ", ''), " +
                          (d_database.tableContainsColumn("recipient", "profile_joined_name") ? "NULLIF(recipient.profile_joined_name, ''),"s : ""s) +
                          "NULLIF(recipient." + d_recipient_profile_given_name + ", ''), " +
                          "NULLIF(recipient." + d_recipient_e164 + ", ''), NULLIF(recipient." + d_recipient_aci + ", ''), recipient._id) AS 'name'"
                          " FROM recipient WHERE " + d_recipient_e164 + " = ?", field4[k], &res);
        else
          d_database.exec("SELECT COALESCE(recipient_preferences.system_display_name, recipient_preferences.signal_profile_name) AS 'name' FROM recipient_preferences WHERE recipient_preferences.recipient_ids = ?", field4[k], &res);

        std::string name = field4[k];
        if (res.rows() == 1 && res.columns() == 1 && res.valueHasType<std::string>(0, "name"))
          name = res.getValueAs<std::string>(0, "name");

        members += name;
        if (k < field4.size() - 1)
          members += ", ";
      }
    }
    if (!members.empty())
      result += "\n" + members + " joined the group.";

    std::string title = statusmsg.getField<3>().value_or(std::string());
    if (!title.empty())
    {
      result += (!members.empty() ? ' ' : '\n');
      result += "Group name is now '" + title + "'.";
    }
    return result;
  } // GROUPUPDATE && !GROUP_V2





  // SOME NON-GROUP TYPES (_can_ still occur in group)

  if (Types::isGroupQuit(type))
  {
    if (Types::isOutgoing(type))
      return "You left the group.";
    return contactname + " left the group.";
  }

  if (Types::isIncomingVideoCall(type))
    return "Incoming video call";
  if (Types::isOutgoingVideoCall(type))
    return "Outgoing video call";
  if (Types::isMissedVideoCall(type))
    return "Missed video call";
  if (Types::isIncomingCall(type))
    return "Incoming voice call";
  if (Types::isOutgoingCall(type))
    return "Outgoing voice call";
  if (Types::isMissedCall(type))
    return "Missed voice call";
  if (Types::isGroupCall(type))
    return "Group call";

  if (Types::isJoined(type))
    return contactname + " is on Signal!";
  if (Types::isExpirationTimerUpdate(type))
  {
    expiration /= 1000; // from milli to seconds (the group update expiration timer is in seconds)
    if (expiration <= 0)
    {
      if (Types::isOutgoing(type))
        return "You disabled disappearing messages.";
      return contactname + " disabled disappearing messages.";
    }

    std::string time;
    if (expiration < 60) // less than full minute
      time = bepaald::toString(expiration) + " second" + (expiration > 1 ? "s" : "");
    else if (expiration < 60 * 60) // less than full hour
      time = bepaald::toString(expiration / 60) + " minute" + ((expiration / 60) > 1 ? "s" : "");
    else if (expiration < 24 * 60 * 60) // less than full day
      time = bepaald::toString(expiration / (60 * 60)) + " hour" + ((expiration / (60 * 60)) > 1 ? "s" : "");
    else if (expiration < 7 * 24 * 60 * 60) // less than full week
      time = bepaald::toString(expiration / (24 * 60 * 60)) + " day" + ((expiration / (24 * 60 * 60)) > 1 ? "s" : "");
    else // show expiration in number of weeks
      time = bepaald::toString(expiration / (7 * 24 * 60 * 60)) + " week" + ((expiration / (7 * 24 * 60 * 60)) > 1 ? "s" : "");

    if (Types::isOutgoing(type))
      return "You set the disappearing message timer to " + time;
    return contactname + " set the disappearing message timer to " + time;
  }
  if (Types::isIdentityUpdate(type))
    return "Your safety number with " + contactname + " has changed.";
  if (Types::isIdentityVerified(type))
  {
    if (Types::isOutgoing(type))
      return "You marked your safety number with " + contactname + " verified";
    return "You marked your safety number with " + contactname + " verified from another device";
  }
  if (Types::isIdentityDefault(type))
  {
    if (Types::isOutgoing(type))
      return "You marked your safety number with " + contactname + " unverified";
    return "You marked your safety number with " + contactname + " unverified from another device";
  }
  if (Types::isNumberChange(type))
  {
    if (Types::isOutgoing(type))
      return "You changed your phone number."; // doesnt exist
    return contactname + " changed their phone number.";
  }
  if (Types::isDonationRequest(type))
  {
    return "Like this new feature? Help support Signal with a one-time donation.";
  }
  if (Types::isEndSession(type))
  {
    if (Types::isOutgoing(type))
      return "You reset the secure session.";
    return contactname + " reset the secure session.";
  }
  if (Types::isProfileChange(type))
  {
    return decodeProfileChangeMessage(body, contactname);
  }
  if (Types::isMessageRequestAccepted(type))
  {
    return "You accepted the message request";
  }







  /*    GROUP_V2 UPDATES    */

  if (Types::isGroupUpdate(type) && Types::isGroupV2(type)) // see app/src/test/java/org/thoughtcrime/securesms/database/model/GroupsV2UpdateMessageProducerTest.java
  {

    //std::cout << body << std::endl;
    DecryptedGroupV2Context groupv2ctx(body);
    //groupv2ctx.print();
    std::string statusmsg;

    if (groupv2ctx.getField<2>().has_value())
    {
      DecryptedGroupChange groupchange = groupv2ctx.getField<2>().value();
      //std::cout << bepaald::bytesToHexString(groupchange.data(), groupchange.size()) << std::endl;
      //groupchange.print();

      // invite link changed:
      if (groupchange.getField<15>().has_value())
      {
        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEGAPHONE;

        // new value: 0 unknown, 1 any, 2 member, 3 admin, 4 unsatisfiable
        int accesscontrol = groupchange.getField<15>().value();

        // get editor
        std::string editoruuid;
        if (groupchange.getField<1>().has_value())
        {
          auto [uuid, uuid_size] = groupchange.getField<1>().value();
          editoruuid = bepaald::toLower(bepaald::bytesToHexString(uuid, uuid_size, true));
          editoruuid.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
        }

        // previous accesscontrol: 0 unknown, 1 any, 2 member, 3 admin, 4 unsatisfiable
        int old_accesscontrol = 0;
        if (groupv2ctx.getField<4>().has_value() &&
            groupv2ctx.getField<4>().value().getField<5>().has_value() &&
            groupv2ctx.getField<4>().value().getField<5>().value().getField<3>().has_value())
          old_accesscontrol = groupv2ctx.getField<4>().value().getField<5>().value().getField<3>().value();

        if (editoruuid == d_selfuuid)
        {
          if (accesscontrol == 4)
            return "You turned off the group link.";
          if (accesscontrol == 3)
          {
            if (old_accesscontrol == 1)
              return "You turned on admin approval for the group link.";
            else
              return "You turned on the group link with admin approval on.";
          }
          if (accesscontrol == 1)
          {
            if (old_accesscontrol == 3)
              return "You turned off admin approval for the group link.";
            else
              return "You turned on the group link with admin approval off.";
          }
        }

        std::string editorname = editoruuid.empty() ? editoruuid : getNameFromUuid(editoruuid);
        if (editorname.empty())
        {
          if (accesscontrol == 4)
            return "The group link has been turned off.";
          if (accesscontrol == 3)
          {
            if (old_accesscontrol == 1)
              return "The admin approval for the group link has been turned on.";
            else
              return "The group link has been turned on with admin approval on.";
          }
          if (accesscontrol == 1)
          {
            if (old_accesscontrol == 3)
              return "The admin approval for the group link has been turned off.";
            else
              return "The group link has been turned on with admin approval off.";
          }
        }
        else
        {
          if (accesscontrol == 4)
            return editorname + " turned off the group link.";
          if (accesscontrol == 3)
          {
            if (old_accesscontrol == 1)
              return editorname + " turned on admin approval for the group link.";
            else
              return editorname + " turned on the group link with admin approval on.";
          }
          if (accesscontrol == 1)
          {
            if (old_accesscontrol == 3)
              return editorname + " turned off admin approval for the group link.";
            else
              return editorname + " turned on the group link with admin approval off.";
          }
          // if (accesscontrol...
        }

      }


      // for accepting invites: check DecryptedGroupChange<1>: (editor)
      // and                          DecryptedGroupChange<9>[]:DecryptedMember<1>: uuid (promotePendingMembers)
      //
      // if editor == self
        //   if (promotependingmembers contains self)
        //     "You accepted the invitation to the group."
        //   else
        //     "You added invited member Bob."
        // else
        //   if (promotependingmembers contains self)
        //     "Bob added you to the group." (or if editor is unknown: "You joined the group.");
        //   else if (promotependingmembers contains editor)
        //     "Bob accepted an invitation to the group."
      //   else
      //     "Bob added invited member Alice." (or if editor is unknown: "Alice joined the group.");

      if (groupchange.getField<1>().has_value() &&
          groupchange.getField<9>().size())
      {
        // editor
        auto [uuid, uuid_size] = groupchange.getField<1>().value();
        std::string uuidstr = bepaald::toLower(bepaald::bytesToHexString(uuid, uuid_size, true));
        uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');

        std::vector<std::string> promotedmemberuuids;
        for (unsigned int i = 0; i < groupchange.getField<9>().size(); ++i)
        {
          DecryptedMember dm = groupchange.getField<9>()[i];
          if (dm.getField<1>().has_value())
          {
            auto [tmpuuid, tmpuuid_size] = dm.getField<1>().value();
            std::string pmus = bepaald::toLower(bepaald::bytesToHexString(tmpuuid, tmpuuid_size, true));
            pmus.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
            promotedmemberuuids.emplace_back(pmus);
          }
        }

        if (bepaald::contains(promotedmemberuuids, uuidstr)) // the editor is promoted -> someone accepted an invite
        {
          if (icon && *icon == IconType::NONE)
            *icon = IconType::MEMBER_APPROVED;

          if (uuidstr == d_selfuuid)
            return "You accepted the invitation to the group.";
          else
          {
            std::string promotedmember = getNameFromUuid(uuidstr);
            if (!promotedmember.empty())
              return promotedmember + " accepted an invitation to the group.";
            else
              return "A new member accepted an invitation to the group.";
          }
        }
        else // the editor is not one of the promoted members
        {
          if (icon && *icon == IconType::NONE)
            *icon = IconType::MEMBER_ADD;
          if (uuidstr == d_selfuuid)
          {
            if (promotedmemberuuids.size() == 1)
            {
              std::string promotedmember = getNameFromUuid(promotedmemberuuids[0]);
              if (!promotedmember.empty())
                return "You added invited member " + promotedmember;
              else
                return "You added an invited member";
            }
            else
              return "You added " + bepaald::toString(promotedmemberuuids.size()) + "invited members";
          }
          else if (bepaald::contains(promotedmemberuuids, d_selfuuid)) // you were not editor, but were promoted
          {
            std::string editorname = getNameFromUuid(uuidstr);
            if (!editorname.empty())
              return editorname + "added you to the group.";
            else
              return "You joined the group.";
          }
          else // you were not editor AND not the promoted member
          {
            std::string editorname = getNameFromUuid(uuidstr);
            if (!editorname.empty())
            {
              if (promotedmemberuuids.size() == 1)
              {
                std::string promotedmember = getNameFromUuid(promotedmemberuuids[0]);
                if (!promotedmember.empty())
                  return editorname + " added invited member " + promotedmember + ".";
                else
                  return editorname + " added an invited member.";
              }
              else
                return editorname + " added " + bepaald::toString(promotedmemberuuids.size()) + " invited members.";
            }
            else
            {
              if (promotedmemberuuids.size() == 1)
              {
                std::string promotedmember = getNameFromUuid(promotedmemberuuids[0]);
                if (!promotedmember.empty())
                  return promotedmember + " joined the group.";
                else
                  return "An invited member joined the group.";
              }
              else
                return bepaald::toString(promotedmemberuuids.size()) + " members joined the group.";
            }
          }
        }
      }

      // if this is revision 0, and no previous state is given, and new title is -> creataed new group
      if (!groupv2ctx.getField<4>().has_value() && // no previous state
          (groupv2ctx.getField<1>().has_value() &&
           groupv2ctx.getField<1>().value().getField<2>().has_value() && groupv2ctx.getField<1>().value().getField<2>().value() == 0))
      {
        auto [uuid, uuid_size] = groupchange.getField<1>().value();
        std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
        uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');

        if (Types::isOutgoing(type))
        {
          if (icon && *icon == IconType::NONE)
            *icon = IconType::MEMBERS;
          return "You created the group.";
        }
        //else
        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEMBER_ADD;
        return contactname + " added you to the group.";
      }

      // check group title changed
      if (groupchange.getField<10>().has_value() &&
          groupchange.getField<10>().value().getField<1>().has_value())
      {
        statusmsg += (Types::isOutgoing(type) ? "You" : contactname) + " changed the group name to \"" + groupchange.getField<10>().value().getField<1>().value() + "\".";
        if (icon)
          *icon = IconType::PENCIL;
      }

      // check group description changed
      if (groupchange.getField<20>().has_value()/* && groupchange.getField<20>().value().getField<1>().has_value()*/)
      {
        statusmsg += (!statusmsg.empty() ? "\n" : "") + (Types::isOutgoing(type) ? "You" : contactname) + " changed the group description.";
        if (icon)
          *icon = IconType::PENCIL;
      }

      // check group avatar changed
      if (groupchange.getField<11>().has_value()/* && groupchange.getField<11>().value().getField<1>().has_value()*/)
      {
        statusmsg += (!statusmsg.empty() ? "\n" : "") + (Types::isOutgoing(type) ? "You" : contactname) + " changed the group avatar.";
        if (icon && *icon == IconType::NONE)
          *icon = IconType::AVATAR_UPDATE;
      }

      // check group timer changed : THIS TIMER IS IN SECONDS (message.expires_in, for non-group messages is in milliseconds)
      if (groupchange.getField<12>().has_value()/* && groupchange.getField<12>().value().getField<1>().has_value()*/)
      {
        uint32_t newexp = groupchange.getField<12>().value().getField<1>().value_or(0);
        std::string time;
        if (newexp == 0)
          time = "Off";
        else if (newexp < 60) // less than full minute
          time = bepaald::toString(newexp) + " second" + (newexp > 1 ? "s" : "");
        else if (newexp < 60 * 60) // less than full hour
          time = bepaald::toString(newexp / 60) + " minute" + ((newexp / 60) > 1 ? "s" : "");
        else if (newexp < 24 * 60 * 60) // less than full day
          time = bepaald::toString(newexp / (60 * 60)) + " hour" + ((newexp / (60 * 60)) > 1 ? "s" : "");
        else if (newexp < 7 * 24 * 60 * 60) // less than full week
          time = bepaald::toString(newexp / (24 * 60 * 60)) + " day" + ((newexp / (24 * 60 * 60)) > 1 ? "s" : "");
        else // show newexp in number of weeks
          time = bepaald::toString(newexp / (7 * 24 * 60 * 60)) + " week" + ((newexp / (7 * 24 * 60 * 60)) > 1 ? "s" : "");
        statusmsg += (!statusmsg.empty() ? "\n" : "") + (Types::isOutgoing(type) ? "You" : contactname) + " set the disappearing message timer to " + time + ".";
        if (icon && *icon == IconType::NONE)
          *icon = (newexp == 0) ? IconType::TIMER_DISABLE : IconType::TIMER_UPDATE;
      }

      // check new member:
      if (groupchange.getField<3>().size())
      {
        // get editor of this group change
        std::string editoruuid;
        if (groupchange.getField<1>().has_value())
        {
          auto [uuid, uuid_size] = groupchange.getField<1>().value();
          editoruuid = bepaald::bytesToHexString(uuid, uuid_size, true);
          editoruuid.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
        }

        auto newmembers = groupchange.getField<3>();
        for (unsigned int i = 0; i < newmembers.size(); ++i)
        {
          auto [uuid, uuid_size] = newmembers[i].getField<1>().value_or(std::make_pair(nullptr, 0)); // bytes
          std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
          uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');


          if (uuidstr == editoruuid) // you can't add yourself to the group, if this happens
          {                          // you joined via invite link (without approval)
            statusmsg += (Types::isOutgoing(type) ? "You" : contactname) + " joined the group via the group link";
            if (icon && *icon == IconType::NONE)
              *icon = IconType::MEMBER_APPROVED;
          }
          else
          {
            statusmsg += (Types::isOutgoing(type) ? "You" : contactname) + " added " + getNameFromUuid(uuidstr) + ".";
            if (icon && *icon == IconType::NONE)
              *icon = IconType::MEMBER_ADD;
          }
        }
      }

      // check members left:
      auto deletedmembers = groupchange.getField<4>();
      for (unsigned int i = 0; i < deletedmembers.size(); ++i) // I dont know how this can be more than size() == 1
      {
        auto [uuid, uuid_size] = deletedmembers[i]; // bytes
        std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
        uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
        statusmsg += (!statusmsg.empty() ? "\n" : "") + (Types::isOutgoing(type) ? "You" : contactname) + " removed " + getNameFromUuid(uuidstr) + ".";
        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEMBER_REMOVE;
      }

      // check memberrole change
      auto memberrolechanges = groupchange.getField<5>();
      for (unsigned int i = 0; i < memberrolechanges.size(); ++i) // I dont know how this can be more than size() == 1
      {
        DecryptedModifyMemberRole mr = memberrolechanges[i];

        std::string uuidstr;
        if (mr.getField<1>().has_value())
        {
          auto [uuid, uuid_size] = mr.getField<1>().value();
          uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
          uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
        }
        /*
          message Member {
          enum Role {
          UNKNOWN       = 0;
          DEFAULT       = 1;
          ADMINISTRATOR = 2;
          }*/
        int newrole = mr.getField<2>().value_or(0);

        if (newrole == 2)
          statusmsg += (!statusmsg.empty() ? "\n" : "") + (Types::isOutgoing(type) ? "You" : contactname) + " made " + getNameFromUuid(uuidstr) + " an admin.";
        else
          statusmsg += (!statusmsg.empty() ? "\n" : "") + (Types::isOutgoing(type) ? "You" : contactname) + " revoked admin privileges from " + getNameFromUuid(uuidstr) + ".";
        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEGAPHONE;
      }

      // // check members left:
      // auto deletedmembers = groupchange.getField<4>();
      // for (unsigned int i = 0; i < deletedmembers.size(); ++i) // I dont know how this can be more than size() == 1
      // {
      //   auto [uuid, uuid_size] = deletedmembers[i]; // bytes
      //   std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
      //   uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
      //   statusmsg += (!statusmsg.empty() ? "\n" : "") + (Types::isOutgoing(type) ? "You" : contactname) + " removed " + getNameFromUuid(uuidstr) + ".";
      // }

      // field 19 == newInviteLinkPassword
      if (groupchange.getField<19>().has_value() && groupchange.getField<1>().has_value())
      {
        auto [uuid, uuid_size] = groupchange.getField<1>().value();
        std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
        uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');

        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEGAPHONE;

        // field 15 == newInviteLinkAccess (== always 1 (== admin approval off) on creation?)
        if (!groupchange.getField<15>().has_value())
          statusmsg +=  (Types::isOutgoing(type) ? "You" : getNameFromUuid(uuidstr)) + " reset the group link.";
        else
        {
          int accesscontrol = groupchange.getField<15>().value();
          statusmsg += (Types::isOutgoing(type) ? "You" : getNameFromUuid(uuidstr)) + " turned on the group link with admin approval " +
            (accesscontrol == 3 ? "on." : "off."); // never 3/on at creation
        }
      }

      // Field 21 'newIsAnnouncementGroup'
      if (groupchange.getField<21>().has_value())
      {
        std::string uuidstr;
        if (groupchange.getField<1>().has_value())
        {
          auto [uuid, uuid_size] = groupchange.getField<1>().value();
          uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
          uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
        }

        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEGAPHONE;
        /*
          enum EnabledState {
          UNKNOWN  = 0;
          ENABLED  = 1;
          DISABLED = 2;
          }
        */
        int enabledstate = groupchange.getField<21>().value();
        if (enabledstate == 2)
        {
          if (uuidstr.empty())
            statusmsg += "The group settings were changed to allow all members to send messages.";
          else
            statusmsg += (Types::isOutgoing(type) ? "You" : getNameFromUuid(uuidstr)) + " changed the group settings to allow all members to send messages.";
        }
        else
        {
          if (uuidstr.empty())
            statusmsg += "The group settings were changed to only allow all admins to send messages.";
          else
            statusmsg += (Types::isOutgoing(type) ? "You" : getNameFromUuid(uuidstr)) + " changed the group settings to only allow admins to send messages.";
        }
      }

      // Field 13 'newAttributeAccess' : who can edit group info
      if (groupchange.getField<13>().has_value() && groupchange.getField<1>().has_value())
      {
        auto [uuid, uuid_size] = groupchange.getField<1>().value();
        std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
        uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');

        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEGAPHONE;
        /*
          UNKNOWN       = 0;
          ANY           = 1;
          MEMBER        = 2;
          ADMINISTRATOR = 3;
          UNSATISFIABLE = 4;
        */
        int accesscontrol = groupchange.getField<13>().value();
        statusmsg += (Types::isOutgoing(type) ? "You" : getNameFromUuid(uuidstr)) + " changed who can edit group info to \"" +
          (accesscontrol == 3 ? "Only admins" : "All members") + "\".";
      }

      // Field 14 'newmemberaccess' : who can edit group membership
      if (groupchange.getField<14>().has_value() && groupchange.getField<1>().has_value())
      {
        auto [uuid, uuid_size] = groupchange.getField<1>().value();
        std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
        uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');

        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEGAPHONE;
        /*
          UNKNOWN       = 0;
          ANY           = 1;
          MEMBER        = 2;
          ADMINISTRATOR = 3;
          UNSATISFIABLE = 4;
        */
        int accesscontrol = groupchange.getField<14>().value();
        statusmsg += (Types::isOutgoing(type) ? "You" : getNameFromUuid(uuidstr)) + " changed who can edit group membership to \"" +
          (accesscontrol == 3 ? "Only admins" : "All members") + "\".";
      }

      // Field 16 'requesting member' : want to join
      if (groupchange.getField<16>().size() && groupchange.getField<1>().has_value())
      {
        auto [uuid, uuid_size] = groupchange.getField<1>().value();
        std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
        uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');

        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEMBERS;

        // if field 17 'deletereqestingmembers' is also present (and same uuid as reqesting member?)
        // the memebrs has cancelled their request.
        std::string cancelleduuidstr;
        if (groupchange.getField<17>().size())
        {
          auto [cancelleduuid, cancelleduuid_size] = groupchange.getField<17>()[0];
          cancelleduuidstr = bepaald::bytesToHexString(cancelleduuid, cancelleduuid_size, true);
          cancelleduuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
        }

        if (cancelleduuidstr == uuidstr)
        {
          statusmsg += (statusmsg.empty() ? "" : " ") +
            getNameFromUuid(uuidstr) + " requested and cancelled their request to join via the group link.";
        }
        else
        {
          // field 16 is (vector of) requesting members (= [uuid, profilekey, timestamp]).
          // But all that's needed is the uuid and we have that from <1> already
          statusmsg += (statusmsg.empty() ? "" : " ") +
            getNameFromUuid(uuidstr) + " requested to join via the group link.";
        }
      }

      // Field 18 'approved member' : added after request
      if (groupchange.getField<18>().size() && groupchange.getField<1>().has_value())
      {
        auto [uuid, uuid_size] = groupchange.getField<1>().value();
        std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
        uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');

        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEMBER_APPROVED;

        auto const &approved_members = groupchange.getField<18>();
        for (unsigned int i = 0; i < approved_members.size(); ++i)
        {
          if (!approved_members[i].getField<1>().has_value())
            continue;
          auto [uuid2, uuid_size2] = approved_members[i].getField<1>().value();
          std::string uuidstr2 = bepaald::bytesToHexString(uuid2, uuid_size2, true);
          uuidstr2.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
          std::string newmem = getNameFromUuid(uuidstr2);
          if (!newmem.empty())
            statusmsg += (statusmsg.empty() ? "" : " ") +
              (Types::isOutgoing(type) ? "You" : getNameFromUuid(uuidstr)) + " approved a request to join the group from " + newmem + ".";
        }
      }

      // field 22 'new banned member' , when combined with 17 ('delete reqeusting members) : request denied
      if (groupchange.getField<22>().size() && groupchange.getField<1>().has_value())
      {
        auto [uuid, uuid_size] = groupchange.getField<1>().value();
        std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
        uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');

        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEMBER_REJECTED;

        DecryptedBannedMember decryptedbannedmember = groupchange.getField<22>()[0];
        std::string banneduuidstr;
        if (decryptedbannedmember.getField<1>().has_value())
        {
          auto [banneduuid, banneduuid_size] = decryptedbannedmember.getField<1>().value();
          banneduuidstr = bepaald::bytesToHexString(banneduuid, banneduuid_size, true);
          banneduuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
        }

        // if field 17 'deletereqestingmembers' is also present (and same uuid as reqesting member?)
        // the members request was denied
        std::string cancelleduuidstr;
        if (groupchange.getField<17>().size())
        {
          auto [cancelleduuid, cancelleduuid_size] = groupchange.getField<17>()[0];
          cancelleduuidstr = bepaald::bytesToHexString(cancelleduuid, cancelleduuid_size, true);
          cancelleduuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
        }

        if (cancelleduuidstr == banneduuidstr)
        {
          statusmsg += (statusmsg.empty() ? "" : " ") +
            getNameFromUuid(uuidstr) + " denied a request to join the group from " + getNameFromUuid(banneduuidstr);
        }
        else // non-requesting member was banned???
        {
        }
      }

      // if groupchange has editor, but nothing else : editor added you to the group:
      if (groupchange.getField<1>().has_value() &&
          !(groupchange.getField<2>().has_value() ||
            groupchange.getField<3>().size() ||
            groupchange.getField<4>().size() ||
            groupchange.getField<5>().size() ||
            groupchange.getField<6>().size() ||
            groupchange.getField<7>().size() ||
            groupchange.getField<8>().size() ||
            groupchange.getField<9>().size() ||
            groupchange.getField<10>().has_value() ||
            groupchange.getField<11>().has_value() ||
            groupchange.getField<12>().has_value() ||
            groupchange.getField<13>().has_value() ||
            groupchange.getField<14>().has_value() ||
            groupchange.getField<15>().has_value() ||
            groupchange.getField<16>().size() ||
            groupchange.getField<17>().size() ||
            groupchange.getField<18>().size() ||
            groupchange.getField<19>().has_value() ||
            groupchange.getField<20>().has_value() ||
            groupchange.getField<21>().has_value() ||
            groupchange.getField<22>().size() ||
            groupchange.getField<23>().size() ||
            groupchange.getField<24>().size()))
      {
        auto [uuid, uuid_size] = groupchange.getField<1>().value();
        std::string uuidstr = bepaald::bytesToHexString(uuid, uuid_size, true);
        uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');

        statusmsg = getNameFromUuid(uuidstr) + " added you to the group.";
        if (icon && *icon == IconType::NONE)
          *icon = IconType::MEMBER_ADD;
      }
    }


    // maybe someone was invited, check for pending memebers...
    if (groupv2ctx.getField<3>().has_value() &&
        groupv2ctx.getField<3>().value().getField<8>().size())
    {
      std::vector<std::pair<std::string, std::string>> invitedmembers; // <invited_uuid, invited_by_uuid>

      for (unsigned int i = 0; i < groupv2ctx.getField<3>().value().getField<8>().size(); ++i)
      {
        DecryptedPendingMember pm(groupv2ctx.getField<3>().value().getField<8>()[i]);
        //pm.print();
        if (pm.getField<1>().has_value())
        {
          auto [inv_uuid, inv_uuid_size] = pm.getField<1>().value();
          std::string invited_uuidstr = bepaald::toLower(bepaald::bytesToHexString(inv_uuid, inv_uuid_size, true));
          invited_uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
          std::string invited_by_uuidstr;
          if (pm.getField<3>().has_value())
          {
            auto [inv_by_uuid, inv_by_uuid_size] = pm.getField<3>().value();
            invited_by_uuidstr = bepaald::toLower(bepaald::bytesToHexString(inv_by_uuid, inv_by_uuid_size, true));
            invited_by_uuidstr.insert(8, 1, '-').insert(13, 1, '-').insert(18, 1, '-').insert(23, 1, '-');
          }
          invitedmembers.emplace_back(std::pair<std::string, std::string>{invited_uuidstr, invited_by_uuidstr});
        }
      }

      if (icon && *icon == IconType::NONE)
        *icon = IconType::MEMBER_ADD;

      if (invitedmembers.size() > 1) // multiple members were invited
      {
        // not done yet
      }
      else // one member was invited
      {
        if (invitedmembers[0].second == d_selfuuid) // invited by you
        {
          std::string invitedname = getNameFromUuid(invitedmembers[0].first);
          if (!invitedname.empty())
            return "You invited " + invitedname + " to the group.";
          else
            return "You invited 1 person to the group.";
        }
        else if (invitedmembers[0].first == d_selfuuid) // you were the one invited
        {
          std::string invitedbyname = getNameFromUuid(invitedmembers[0].second);
          if (!invitedbyname.empty())
            return invitedbyname + " invited you to the group.";
          else
            return "You were invited to the group.";
        }
        else // someone was invited by someone (but neither were you)
        {
          std::string invitedbyname = getNameFromUuid(invitedmembers[0].second);
          if (!invitedbyname.empty())
            return invitedbyname + " invited 1 person to the group.";
          else
            return "1 person was invited to the group.";
        }
      }

    }



    if (statusmsg.empty())
    {
      // std::cout << "" << std::endl;
      // std::cout << "  ********" << std::endl;
      // std::cout << body << std::endl;
      // //groupv2ctx.print();
      // groupv2ctx.getField<2>().value().print();
      // std::cout << "  ********" << std::endl;
      // std::cout << "" << std::endl;
      return "(group V2 update)";
    }
    return statusmsg;
  }

  if (type == Types::GV1_MIGRATION_TYPE)
  {
    if (body.empty())
    {
      if (icon && *icon == IconType::NONE)
        *icon = IconType::MEGAPHONE;
      return "This group was updated to a New Group.";
    }

    std::string b;
    // parse body, get number of id's before '|': if one
    //b = "A member couldn't be added to the New Group and has been invited to join."
    // if N
    //b = "N members couldn't be added to the New Group and have been invited to join."
    // parse body, get number of id's after '|': if one
    //b = "A member couldn't be added to the New Group and has been removed.";
    // if N
    //b = "N members couldn't be added to the New Group and have been removed.";
    unsigned int middlepos = body.find('|');
    int membersinvited = std::count(body.begin(), body.begin() + middlepos, ',') + (middlepos == 0 ? 0 : 1);
    int membersremoved = std::count(body.begin() + middlepos + 1, body.end(), ',') + (middlepos == body.size() - 1 ? 0 : 1);
    if (membersinvited == 1)
      b = "A member couldn't be added to the New Group and has been invited to join.";
    else if (membersinvited > 1)
      b = bepaald::toString(membersinvited) + " members couldn't be added to the New Group and have been invited to join.";
    if (membersremoved == 1)
      b = (b.empty() ? std::string() : "\n") + "A member couldn't be added to the New Group and has been removed.";
    else if (membersremoved > 1)
      b = (b.empty() ? "" : "\n") + bepaald::toString(membersremoved) + " members couldn't be added to the New Group and have been removed.";

    if (membersinvited >= 1 && membersremoved == 0)
    {
      if (icon && *icon == IconType::NONE)
        *icon = IconType::MEMBER_ADD;
    }
    else if (membersinvited == 0 && membersremoved >= 1)
    {
      if (icon && *icon == IconType::NONE)
        *icon = IconType::MEMBER_REMOVE;
    }
    else // membersinvited >= 1 && membersremoved >= 1, // never seen this... don't know...
    {
      if (icon && *icon == IconType::NONE)
        *icon = IconType::MEGAPHONE; //MEMBERS;
    }

    return b;
  }

  return body;
}


std::string SignalBackup::decodeStatusMessage(std::pair<std::shared_ptr<unsigned char []>, size_t> const &body, long long int expiration,
                                              long long int type, std::string const &contactname, IconType *icon) const
{
  // get GroupV2Context from MessageExtras, pass it as a base64string to decodestatusmessage
  MessageExtras me(body);
  auto field1 = me.getField<1>();
  if (field1.has_value()) // GV2UpdateDescription
  {
    auto field1_1 = field1->getField<1>();
    if (field1_1.has_value())
    {
      return decodeStatusMessage(field1_1->getDataString(), expiration, type, contactname, icon);

    }
  }
  else
  {
    auto field3 = me.getField<3>(); // ProfileChangeDetails
    if (field3.has_value())
      return decodeProfileChangeMessage(field3->getDataString(), contactname);
  }
  return std::string();
}

/*

type & 0x1f == 14 CHANGE_NUMBER_TYPE

689:app/src/main/res/values/strings.xml:1437:    <string name="MessageRecord_s_changed_their_phone_number">%1$s changed their phone number.</string>
701:app/src/main/res/values/strings.xml:3982:    <string name="ChangeNumber__your_phone_number_has_changed_to_s">Your phone number has been changed to %1$s</string>
*/