/**
  * Converting positions relative to the training area
  * $Id$
  * $HeadURL$
  * $Author$
  * Created by Philipp Dassow, NLST, 21-04-2018
  */

#include "position_converter.h"

#include <AssetManagement/asm_dtc.h>
#include <ExerciseManagement/exm_dtc.h>
#include <QMutex>

namespace OcSituationServer
{

PositionConverter::PositionConverter(MainHandler *m_mainHandler)
  : m_mainHandler(m_mainHandler)
  , m_baseCoord(LtsCoordTrans::UtmCoordinate())
  , m_asmDtc(AssetManagement::Interface::Dtc::create(m_mainHandler->dds()->dds()))
  , m_exmDtc(ExerciseManagement::Interface::Dtc::create(m_mainHandler->dds()->dds()))
  , m_logger(getLogger("PositionConverter"))
{
  m_exmDtc->enableExercise();
  m_asmDtc->enableTrainingArea();
}

LtsCoordTrans::UtmCoordinate PositionConverter::baseCoordinate()
{
  initCoordConversion();
  return m_baseCoord;
}

bool PositionConverter::initCoordConversion()
{
  static QMutex mutex;
  QMutexLocker l(&mutex);

  if (!m_exmDtc)
    return true;

  if (!m_exmDtc->waitForHistoricalDataExercise(15000))
  {
    ERROR_LOG(m_logger) << "Error initializing ExerciseManagement DTC";
    return false;
  }
  const auto ex = m_exmDtc->exercise(m_mainHandler->exerciseId());
  if (ex.id() <= 0)
  {
    ERROR_LOG(m_logger) << "Can not retrieve exercise information for id " << m_mainHandler->exerciseId();
    return false;
  }
  if (!m_asmDtc->waitForHistoricalDataTrainingArea(10000))
  {
    ERROR_LOG(m_logger) << "Error initializing AssetManagement DTC";
    return false;
  }
  const auto ta = m_asmDtc->trainingArea(ex.trainingAreaId());
  if (ta.id() <= 0)
  {
    ERROR_LOG(m_logger) << "Can not retrieve training are information for id " << ex.trainingAreaId();
    return false;
  }

  // calc tetra base point from training area center
  const LtsCoordTrans::UtmCoordinate bottomLeft(LtsCoordTrans::UtmCoordinate::fromGeographic(ta.bottomLeft().lon(), ta.bottomLeft().lat()));
  const QPointF mid(bottomLeft.geographic(ta.width() / 2, ta.height() / 2));

  // our center point is NNxYY 00000 00000 by definition
  // (we can also use current ta center but the it's hard to debug the coordinates in Tetra LogViewer)
  const QString mgrs(LtsCoordTrans::mgrsFromGeographic(mid.x(), mid.y(), -1) + QStringLiteral("00000000000000"));

  // now we've the correct tetra base point
  m_baseCoord = LtsCoordTrans::UtmCoordinate::fromMgrs(mgrs);

  m_asmDtc.reset();
  m_exmDtc.reset();
  return true;
}

} // namespace OcSituationServer