/**
  * @RDE_HEADER@
  * AreaModel
  * $Id$
  * $HeadURL$
  * $Author$
  * Created by Norbert Thoden, NLE, 2020-06-29
  */

#include "tgt_area_model.h"
#include "tgt_common.h"

#include <LtsUtilsCore/variant_operators.h>
#include <LtsCoordTrans/lts_coord_trans.h>
#include <ParticipantManagement/ppm_translation.h>

#include <QApplication> // pixelMetric
#include <QBuffer>

namespace TargetManagement
{

//---------------------------------
// AreaModel
//---------------------------------
AreaModel::AreaModel(QObject *parent)
  : BaseClass(
{
  tr("Id"),
  tr("Name"),

  // main config
  tr("Center"),
  tr("Width"),
  tr("Height"),
},
parent)
, m_logger(getLogger("AreaModel"))
{}


bool AreaModel::initModel(const std::shared_ptr<TargetManagement::Interface::Dtc> &tgtDtc)
{
  m_tgt_dtc = tgtDtc;

  // insert Model
  const QMap<qint32, TargetManagement::ShootbackArea> areas = m_tgt_dtc->shootbackAreas();
  INFO_LOG(m_logger) << "initModel - #AreaModel: " << areas.size();

  connect(m_tgt_dtc.get(), &Interface::Dtc::shootbackAreaChanged,
          this, &AreaModel::onShootbackAreaChanged);

  auto cb = [this](const TargetManagement::ShootbackArea & d) { onShootbackAreaChanged(d, DataModification::eAdded); };
  m_tgt_dtc->shootbackAreas(cb);

  // updateColumnFilter
  connect(this, &AreaModel::rowsInserted, this, &AreaModel::updateColumnFilter);
  connect(this, &AreaModel::rowsRemoved,  this, &AreaModel::updateColumnFilter);
  connect(this, &AreaModel::modelReset,   this, &AreaModel::updateColumnFilter);
  // in case of changing value like hitsToKill:
  connect(this, &AreaModel::dataChanged,  this, &AreaModel::updateColumnFilter);
  updateColumnFilter();

  return true;
}

QVariant AreaModel::headerData(int section, Qt::Orientation orientation, int role) const
{
  if (role == LtsWidgets::LtsColumnFilterProxyModel::ComboboxFilterRole &&
      orientation == Qt::Horizontal)
  {
    // a few QSet<QString> ==>
    const auto processString = [](const QSet<QString> &usedXYCont) -> QVariant
    {
      LtsWidgets::ComboboxFilterContent cfc;
      cfc.data.reserve(usedXYCont.size());
      LtsWidgets::ComboboxFilterData cfd;

      for (const QString &value : usedXYCont)
      {
        cfd.data = value;
        cfd.text = value;
        cfc.data.push_back(cfd);
      }
      cfc.sortItems = true;
      return cfc.toVariant();
    };

    if (section == Name)
      return processString(m_usedNames);
  }
  return BaseClass::headerData(section, orientation, role);
}

QVariant AreaModel::data(const QModelIndex &index, int role) const
{
  INFO_LOG(m_logger) << LOGFUNCTION << " role=" << role
                     << " index = " << index.column();

  if (!indexIsValid(index))
    return QVariant();
  if (role != Qt::DisplayRole &&
      role != Qt::DecorationRole &&
      role != Qt::BackgroundRole &&
      role != Qt::ToolTipRole &&
      role != LtsWidgets::LtsColumnFilterProxyModel::ComboboxFilterRole)
    return QVariant();

  const TargetManagement::ShootbackArea &shootbackArea = m_vecData.at(index.row());

  if (role == Qt::BackgroundRole)
  {
    if ((index.column() == Center) &&
        ((shootbackArea.position().lat() <= 0) || (shootbackArea.position().lon() <= 0)))
      return getWarningBackgroundRole();                          // orange
    if (index.column() == Width && shootbackArea.width() <= 0)
      return getWarningBackgroundRole();                          // orange
    if (index.column() == Height && shootbackArea.height() <= 0)
      return getWarningBackgroundRole();                          // orange
  }
  else

    if (role == LtsWidgets::LtsColumnFilterProxyModel::ComboboxFilterRole)
    {
      if (index.column() == Name)
        return QString::fromStdString(shootbackArea.name());
    }

  switch (index.column())
  {
  case Id:
    return shootbackArea.id();
  case Name:
    return QString::fromStdString(shootbackArea.name());
  case Center:
  {
    const Core::GeoPosition2D &pos = shootbackArea.position();
    return LtsCoordTrans::mgrsFromGeographic(pos.lon(), pos.lat());
  }
  case Width:
    return shootbackArea.width();
  case Height:
    return shootbackArea.height();
  } // switch

  return QVariant();
}

void AreaModel::onShootbackAreaChanged(const TargetManagement::ShootbackArea &data,
                                       const DataModification modType)
{
  BaseClass::onDataChanged(data, modType);
  emit signalAreaNamesChanged();
}

void AreaModel::updateColumnFilter()
{
  m_usedNames.clear();
  for (const ShootbackArea &item : qAsConst(m_vecData))
    m_usedNames.insert(QString::fromStdString(item.name()));
}


// --------------------------------------------------------
// AreaProxyModel
// --------------------------------------------------------
void AreaProxyModel::setSourceModel(QAbstractItemModel *sourceModel)
{
  m_sourceModel = qobject_cast<AreaModel *>(sourceModel);
  BaseClass::setSourceModel(sourceModel);
}

bool AreaProxyModel::lessThan(const QModelIndex &source_left, const QModelIndex &source_right) const
{
  if (!m_sourceModel ||
      source_left.column() != source_right.column() ||
      source_left.row() < 0 || source_left.row() >= m_sourceModel->m_vecData.size() ||
      source_right.row() < 0 || source_right.row() >= m_sourceModel->m_vecData.size()
     )
    return BaseClass::lessThan(source_left, source_right);

  const TargetManagement::ShootbackArea &left = m_sourceModel->m_vecData.at(source_left.row());
  const TargetManagement::ShootbackArea &right = m_sourceModel->m_vecData.at(source_right.row());
  switch (source_left.column())
  {
  case AreaModel::Columns::Id:
    return left.id() < right.id();
  case AreaModel::Columns::Name:
    return left.name() < right.name();
  case AreaModel::Columns::Width:
    return left.width() < right.width();
  case AreaModel::Columns::Height:
    return left.height() < right.height();

  case AreaModel::Columns::Center:
    // QString compare
    return LtsUtils::lessThan(source_left.data(), source_right.data());
  }
  return BaseClass::lessThan(source_left, source_right);
}


} // namespace TargetManagement