// Copyright 2018, University of Freiburg,
// Chair of Algorithms and Data Structures.
// Authors: Patrick Brosi <brosi@informatik.uni-freiburg.de>

#include <set>
#include "pfaedle/trgraph/StatGroup.h"
#include "util/geo/Geo.h"

using pfaedle::trgraph::StatGroup;
using pfaedle::trgraph::Node;
using pfaedle::router::NodeCandGroup;
using ad::cppgtfs::gtfs::Stop;

// _____________________________________________________________________________
StatGroup::StatGroup() {}

// _____________________________________________________________________________
void StatGroup::addStop(const Stop* s) { _stops.insert(s); }

// _____________________________________________________________________________
void StatGroup::addNode(trgraph::Node* n) { _nodes.insert(n); }

// _____________________________________________________________________________
void StatGroup::merge(StatGroup* other) {
  if (other == this) return;

  std::set<Node*> nds = other->getNodes();
  std::set<const Stop*> stops = other->getStops();

  for (auto on : nds) {
    on->pl().getSI()->setGroup(this);
    addNode(on);
  }

  for (auto* os : stops) {
    addStop(os);
  }
}

// _____________________________________________________________________________
const NodeCandGroup& StatGroup::getNodeCands(const Stop* s) const {
  return _stopNodePens.at(s);
}

// _____________________________________________________________________________
const std::set<Node*>& StatGroup::getNodes() const { return _nodes; }

// _____________________________________________________________________________
void StatGroup::remNode(trgraph::Node* n) {
  auto it = _nodes.find(n);
  if (it != _nodes.end()) _nodes.erase(it);
}

// _____________________________________________________________________________
std::set<Node*>& StatGroup::getNodes() { return _nodes; }

// _____________________________________________________________________________
const std::set<const Stop*>& StatGroup::getStops() const { return _stops; }

// _____________________________________________________________________________
double StatGroup::getPen(const Stop* s, trgraph::Node* n,
                         const trgraph::Normalizer& platformNorm,
                         double trackPen, double distPenFac,
                         double nonOsmPen) const {
  POINT p =
      util::geo::latLngToWebMerc<PFAEDLE_PRECISION>(s->getLat(), s->getLng());

  double distPen = util::geo::webMercMeterDist(p, *n->pl().getGeom());
  distPen *= distPenFac;

  std::string platform = platformNorm(s->getPlatformCode());

  if (!platform.empty() && !n->pl().getSI()->getTrack().empty() &&
      n->pl().getSI()->getTrack() == platform) {
    trackPen = 0;
  }

  if (n->pl().getSI()->isFromOsm()) nonOsmPen = 0;

  return distPen + trackPen + nonOsmPen;
}

// _____________________________________________________________________________
void StatGroup::writePens(const trgraph::Normalizer& platformNorm,
                          double trackPen, double distPenFac,
                          double nonOsmPen) {
  if (_stopNodePens.size()) return;  // already written
  for (auto* s : _stops) {
    for (auto* n : _nodes) {
      _stopNodePens[s].push_back(router::NodeCand{
          n, getPen(s, n, platformNorm, trackPen, distPenFac, nonOsmPen)});
    }
  }
}