#include "statnode.hh"

StatNode::Stat StatNode::print(unsigned int depth, Stat newstat, bool silent) const
{
  if(!silent) {
    cout<<string(depth, ' ');
    cout<<name<<": "<<endl;
  }
  Stat childstat;
  childstat.queries += s.queries;
  childstat.noerrors += s.noerrors;
  childstat.nxdomains += s.nxdomains;
  childstat.servfails += s.servfails;
  childstat.drops += s.drops;
  childstat.bytes += s.bytes;
  childstat.hits += s.hits;

  if(children.size()>1024 && !silent) {
    cout<<string(depth, ' ')<<name<<": too many to print"<<endl;
  }
  for(const children_t::value_type& child :  children) {
    childstat=child.second.print(depth+8, childstat, silent || children.size()>1024);
  }
  if(!silent || children.size()>1)
    cout<<string(depth, ' ')<<childstat.queries<<" queries, " << 
      childstat.noerrors<<" noerrors, "<< 
      childstat.nxdomains<<" nxdomains, "<< 
      childstat.servfails<<" servfails, "<< 
      childstat.drops<<" drops, "<<
      childstat.bytes<<" bytes, "<<
      childstat.hits<<" hits"<<endl;

  newstat+=childstat;

  return newstat;
}

void StatNode::visit(const visitor_t& visitor, Stat& newstat, unsigned int depth) const
{
  Stat childstat(s);

  for (const auto& child : children) {
    child.second.visit(visitor, childstat, depth+8);
  }

  visitor(this, s, childstat);

  newstat += childstat;
}

void StatNode::submit(const DNSName& domain, int rcode, unsigned int bytes, bool hit, const std::optional<ComboAddress>& remote, size_t samplingRate)
{
  //  cerr<<"FIRST submit called on '"<<domain<<"'"<<endl;
  std::vector<string> tmp = domain.getRawLabels();
  if (tmp.empty()) {
    return;
  }

  auto last = tmp.end() - 1;
  children[*last].submit(last, tmp.begin(), "", rcode, bytes, remote, 1, hit, samplingRate);
}

static uint64_t adjustForSampling(uint32_t count, size_t samplingRate)
{
  if (samplingRate > 0) {
    return count * samplingRate;
  }
  return count;
}


/* www.powerdns.com. ->
   .                 <- fullnames
   com.
   powerdns.com
   www.powerdns.com. 
*/

void StatNode::submit(std::vector<string>::const_iterator end, std::vector<string>::const_iterator begin, const std::string& domain, int rcode, unsigned int bytes, const std::optional<ComboAddress>& remote, unsigned int count, bool hit, size_t samplingRate)
{
  //  cerr<<"Submit called for domain='"<<domain<<"': ";
  //  for(const std::string& n :  labels) 
  //    cerr<<n<<".";
  //  cerr<<endl;
  if (name.empty()) {

    name=*end;
    //    cerr<<"Set short name to '"<<name<<"'"<<endl;
  }
  else {
    //    cerr<<"Short name was already set to '"<<name<<"'"<<endl;
  }

  if (end == begin) {
    if (fullname.empty()) {
      size_t needed = name.size() + 1 + domain.size();
      if (fullname.capacity() < needed) {
        fullname.reserve(needed);
      }
      fullname = name;
      fullname.append(".");
      fullname.append(domain);
      labelsCount = count;
    }
    //    cerr<<"Hit the end, set our fullname to '"<<fullname<<"'"<<endl<<endl;
    s.queries += adjustForSampling(1U, samplingRate);
    s.bytes += adjustForSampling(bytes, samplingRate);
    if (rcode < 0) {
      s.drops += adjustForSampling(1U, samplingRate);
    }
    else if (rcode == RCode::NoError) {
      s.noerrors += adjustForSampling(1U, samplingRate);
    }
    else if (rcode == RCode::ServFail) {
      s.servfails += adjustForSampling(1U, samplingRate);
    }
    else if (rcode == RCode::NXDomain) {
      s.nxdomains += adjustForSampling(1U, samplingRate);
    }

    if (remote) {
      s.remotes[*remote]++;
    }

    if (hit) {
      s.hits += adjustForSampling(1U, samplingRate);
    }
  }
  else {
    if (fullname.empty()) {
      size_t needed = name.size() + 1 + domain.size();
      if (fullname.capacity() < needed) {
        fullname.reserve(needed);
      }
      fullname = name;
      fullname.append(".");
      fullname.append(domain);
      labelsCount = count;
    }
    //    cerr<<"Not yet end, set our fullname to '"<<fullname<<"', recursing"<<endl;
    --end;
    children[*end].submit(end, begin, fullname, rcode, bytes, remote, count+1, hit, samplingRate);
  }
}
