/**
  * @RDE_HEADER@
  * Proxy Model for hiding empty tracks and sorting tracks by name plus having the "Markers" track always at the top
  * $Id: $
  * $HeadURL: $
  * $Author: $
  *
  * Created by Mike Lennart Wille, SLTE, 2022-06-22
  */

#include "tln_timeline_proxy_model.h"
#include "tln_timeline_model.h"


namespace Timeline
{
TimelineProxyModel::TimelineProxyModel()
  : QSortFilterProxyModel()
{
  //setDynamicSortFilter(true);
  setRecursiveFilteringEnabled(true); // if child gets items for the first time then also show the parent so that the child becomes visible ;)
}


void TimelineProxyModel::toggleShowAllRows()
{
  m_forceShowAllRows = !m_forceShowAllRows;
  invalidateFilter();
}


bool TimelineProxyModel::filterAcceptsRow(int source_row, const QModelIndex &source_parent) const
{
  if (m_forceShowAllRows)
    return true;

  auto index = sourceModel()->index(source_row, 1, source_parent);
  auto index2 = sourceModel()->index(source_row, 0, source_parent);

  if (index.data(Qt::UserRole).toInt() == 666) // always show markers
  {
    return true;
  }

  int trackId = index.data().toInt();

  // TODO: correct solution instead of accessing the TimelineModel directly and depending on it??
  if (m_modelCachedPointer == nullptr)
    m_modelCachedPointer = qobject_cast<TimelineModel *>(sourceModel());

  try
  {
    const Track &t = m_modelCachedPointer->track(trackId);
    return t.hasItems();
  }
  catch (...)
  {
    Q_ASSERT(false);
    return true; // bail
  }
}


bool TimelineProxyModel::lessThan(const QModelIndex &source_left, const QModelIndex &source_right) const
{
  //qWarning() << "lessThan";

  // Qt doc: "Returns true if [..] source_left is less than [..] source_right, otherwise returns false."
  // NOTE: only eItems is supported

 //qWarning() << "lessThan marker source_left" << source_left.data(Qt::UserRole).toInt() << " "<<  source_left.data(Qt::DisplayRole).toString();
  //qWarning() << "lessThan marker source_right" << source_right.data(Qt::UserRole).toInt() << " "<<  source_right.data(Qt::DisplayRole).toString();

  // markers
  if (source_left.data(Qt::UserRole).toInt() == 1)
  {
    return true;
  }
  if (source_right.data(Qt::UserRole).toInt() == 1)
  {
    return false;
  }
  //Number compare
  bool okL = false;
  bool okR = false;
  int intL = source_left.data().toInt(&okL);
  int intR = source_right.data().toInt(&okR);
  if (okL && okR)
    return intL < intR;
  //String Compare
  return QString::compare(source_left.data().toString(), source_right.data().toString()) < 0;

  //return QSortFilterProxyModel::lessThan(source_left, source_right);
}
} // namespace Timeline