#include "script_timeline.h"
#include "ui_script_timeline.h"
#include "track_widget.h"
#include "tools.h"
#include "track_entry.h"
#include "track_content_widget.h"
#include "filter_track_widget.h"
#include "filter_background_widget.h"
#include "temporary_pointer_vector.h"

#include <LtsWidgets/lts_message_dialog.h>

#include <QMessageBox>
#include <QPixmap>
#include <QTimer>
#include <QTime>
#include <QRubberBand>
#include <QCursor>

#include <QDebug>


namespace LtsScriptTimeline
{

ScriptTimeline::ScriptTimeline(QWidget *parent)
  : QWidget(parent)
  , ui(new Ui::ScriptTimeline)
  , m_uniqueId(0)
  , m_scriptId(-1)
  , m_baseTrackWidgetWidth(150)
  , m_readonly(false)
  , m_time(0)
  , m_tools(new Tools(this))
  , m_mlmsMaster(nullptr)
  , m_ignoreChanges(false)
{
  ui->setupUi(this);

  this->setFocusPolicy(Qt::StrongFocus); // catch key events

  ui->indicator->setTools(m_tools);

  // initial timeline length = 5min (5*60)
  ui->trackScrollBar->setMinimum(0);
  ui->trackScrollBar->setMaximum(5 * 60);

  connect(ui->zoomSlider, &QSlider::valueChanged, this, &ScriptTimeline::slotZoomValueChanged);

  connect(ui->trackScrollBar, &QScrollBar::sliderReleased, this, &ScriptTimeline::slotScrollbarValueChanged);
  connect(ui->trackScrollBar, &QScrollBar::actionTriggered, this, &ScriptTimeline::slotScrollbarValueChanged);

  connect(ui->indicator, &Indicator::signalHandleResized,
          this, &ScriptTimeline::slotHeaderHandleResized);
  connect(ui->indicator, &Indicator::signalHeaderIndicatorTimeChanged,
          this, &ScriptTimeline::slotHeaderIndicatorTimeChanged);
  connect(ui->indicator, &Indicator::signalHeaderIndicatorTimeUserChanged,
          this, &ScriptTimeline::signalHeaderIndicatorTimeUserChanged);

  // SetNewScrollBarMaximum: get the 'most right' topic to get the end of the timeline (hacked)
  QTimer *t = new QTimer(this);
  t->setInterval(1500);
  connect(t, &QTimer::timeout,
          this, &ScriptTimeline::slotSetNewScrollBarMaximum);
  t->start();

//#warning TODO: !
  //ui->lblTime->setText(QTime::fromMSecsSinceStartOfDay(0).toString(QStringLiteral("HH:mm:ss")));

  slotZoomValueChanged(ui->zoomSlider->value());
}


ScriptTimeline::~ScriptTimeline()
{
  m_copyTopics.clear(); // otherwise it will crash due m_copyTopics.remove(static_cast<TrackWidget *>(obj)); in copyTopics()
  m_ignoreChanges = true;
  qDeleteAll(m_clipboard); // clear(); <= dangerous
  delete ui;
}


void ScriptTimeline::selectAll()
{
  const QList<TrackWidget *> vecTrackWidgets = getTrackWidgets();
  for (TrackWidget *tw : vecTrackWidgets)
  {
    TrackContentWidget *tcw = tw->getTrackContentWidget();
    tcw->selectAll();
  }
}


bool ScriptTimeline::checkNewLength(TrackEntry *te, int newLength)
{
  const QList<TrackWidget *> tws = getTrackWidgets();
  TrackContentWidget *tesTcw = nullptr;

  // find parent tcw of te
  for (TrackWidget *tw : tws)
  {
    const QVector<TrackEntry *> &tes = tw->getTrackContentWidget()->getTrackEntries();

    auto it = std::find_if(tes.begin(), tes.end(), [te](const TrackEntry * a)
    {
      return (a->m_topicId == te->m_topicId);
    });

    if (it == tes.end())
      continue;

    tesTcw = tw->getTrackContentWidget();
    break;
  }

  if (tesTcw == nullptr)
    return false;

  // the actual magic:
  TrackEntry newTe(te);
  newTe.m_length = newLength; // set new length of the copy of the te to try to see if there is a collision later
  return tesTcw->checkForCollisionsSimple(newTe); // note: new te and check te have the same id (because it was copied), so checkForCollisionsSimple will ignore the check with both topics (or more like "itself")
}


void ScriptTimeline::lockIndicator(bool lock)
{
  ui->indicator->lockIndicator(lock);
}


void ScriptTimeline::keyPressEvent(QKeyEvent *event)
{
  if (event->key() == Qt::Key_Delete)
  {
    slotDeleteSelectedTopics();
  }
  else if (QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) && event->key() == Qt::Key_C)
  {
    slotCopyTopics();
  }
  else if (QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) && event->key() == Qt::Key_V)
  {
    slotPasteTopics();
  }
  else if (QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) && event->key() == Qt::Key_X)
  {
    slotCutTopics();
  }
  else if (QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) && event->key() == Qt::Key_A)
  {
    selectAll();
  }
  else if (QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier) && event->key() == Qt::Key_S)
  {
    emit signalSave();
  }
  else
  {
    const QList<TrackWidget *> vecTrackWidgets = getTrackWidgets();
    for (auto w : vecTrackWidgets)
      w->keyPressEvent(event);
  }
}


void ScriptTimeline::mousePressEvent(QMouseEvent *event)
{
  if (event->buttons() != Qt::LeftButton)
    return;
  slotStartRubberband(event->pos());
}


void ScriptTimeline::mouseMoveEvent(QMouseEvent *)
{
  slotModifyRubberband();
}


void ScriptTimeline::mouseReleaseEvent(QMouseEvent *)
{
  const QList<TrackWidget *> vecTrackWidgets = getTrackWidgets();
  for (auto w : vecTrackWidgets)
    w->unselectAll();

  slotStopRubberband();
}


void ScriptTimeline::slotScroll(int incr)
{
  int oldValue = ui->trackScrollBar->value();
  ui->trackScrollBar->setValue(oldValue + incr);
  slotScrollbarValueChanged();
}


void ScriptTimeline::setReadonly(bool readonly)
{
  m_readonly = readonly;

  const QList<TrackWidget *> vecTrackWidgets = getTrackWidgets();
  for (TrackWidget *tw : vecTrackWidgets)
    tw->setReadonly(readonly);
}


void ScriptTimeline::clear()
{
  m_copyTopics.clear();

  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();

  //qDeleteAll(trackWidgetList);
  for (TrackWidget *tw : trackWidgetList)
    delete tw; //->deleteLater();  using deleteLater will make following calls think that these tws are still available..

  qDeleteAll(m_clipboard);
  m_clipboard.clear();

  m_uniqueId = 0;

  updateEverything();
}


void ScriptTimeline::slotSetNewScrollBarMaximum()
{
  int max = 5 * 60; // basis length of the script timeline

  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (const TrackWidget *tw : trackWidgetList)
  {
    const QVector<TrackEntry *> &trackEntries = tw->getTrackContentWidget()->getTrackEntries();

    for (const TrackEntry *te : trackEntries)
    {
      int maxTeTime = te->m_startTime + te->m_length;
      //qWarning() << "te" << te->topicId << "mexTeTime" << maxTeTime;

      if (maxTeTime > max)
      {
        max = maxTeTime + 5 * 60; // add 1 minute
      }
    }
  }

  //qWarning() << "ScriptTimeline::slotSetNewScrollBarMaximum: max" << max;
  ui->trackScrollBar->setMaximum(max);
  ui->trackScrollBar->setPageStep(60);
  m_tools->m_timelineLength = max;

  updateEverything();
}


void ScriptTimeline::setIndicatorTime(int time)
{
  ui->indicator->setIndicatorTime(time);
}


int ScriptTimeline::getCurrentScriptEndTime()
{
  int currEndTime = 0;
  const QList<TrackWidget *> listTrackWidgets = getTrackWidgets();
  for (const auto ltw : listTrackWidgets)
  {
    const auto cont = ltw->getTrackEntries();
    for (const auto pTE : cont)
    {
      int endTime = pTE->m_startTime + pTE->m_length;
      currEndTime = qMax(currEndTime, endTime);
    }
  }

  return currEndTime;
}


void ScriptTimeline::slotHeaderIndicatorTimeChanged(int time)
{
  m_time = time;

//#warning TODO: !
  //ui->lblTime->setText(QTime::fromMSecsSinceStartOfDay(time * 1000).toString(QStringLiteral("HH:mm:ss")));

  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (TrackWidget *tw : trackWidgetList)
    tw->setIndicatorTime(time);

  emit signalHeaderIndicatorTimeChanged(time);
}


void ScriptTimeline::slotHeaderHandleResized(int newSize)
{
  m_baseTrackWidgetWidth = newSize;

  updateEverything();

  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (TrackWidget *tw : trackWidgetList)
    tw->setBaseWidth(newSize);
}


void ScriptTimeline::slotDeleteTracks()
{
  int count = 0;

  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (const TrackWidget *tw : trackWidgetList)
  {
    if (tw->isSelected())
      count++;
  }

  if (count < 1)
  {
    QApplication::beep();
    return;
  }

  if (QMessageBox::question(this, tr("Delete selected tracks"), tr("Are you sure you want to delete all %1 tracks?").arg(count),
                            QMessageBox::Yes | QMessageBox::No) != QMessageBox::Yes) // replace with framework msg dlg
    return;

  for (TrackWidget *tw : trackWidgetList)
  {
    if (tw->isSelected())
      tw->deleteLater();
  }

  //ui->pbDeleteTracks->setEnabled(false); // nothing selected anymore
}


void ScriptTimeline::slotZoomValueChanged(int value)
{
  if (value < 1)
    value = 1; // prevent 0-div

  m_tools->m_zoomFactor = value;

  //#warning TODO: center the visible mid when zooming (in EventTimeline, too)

  updateEverything();
}



void ScriptTimeline::resizeEvent(QResizeEvent *event)
{
  QWidget::resizeEvent(event);

  {
    QPixmap p(QStringLiteral(":/style/portrait-mode.svg")); // TODO: do not reload svg on every resize
    int h = ui->trackScrollBar->height();
    QSize s(h, h); // 1:1
    ui->lbPortrait->setPixmap(p.scaled(s, Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
    ui->lbPortrait->setFixedSize(s);
  }
  {
    QPixmap p(QStringLiteral(":/style/landscape-mode.svg"));
    int h = ui->trackScrollBar->height();
    QSize s(h, h); // 1:1
    ui->lbLandscape->setPixmap(p.scaled(s, Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
    ui->lbLandscape->setFixedSize(s);
  }

  updateEverything();
}


void ScriptTimeline::slotUnselectAll()
{
  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (TrackWidget *tw : trackWidgetList)
    tw->unselectAll();
}


int ScriptTimeline::getFilterTrackEntryRealTime(TrackEntry *te)
{
  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (TrackWidget *tw : trackWidgetList)
  {
    for (FilterTrackWidget *ftw : tw->filterLines())
    {
      const QMap<int /*id*/, TrackContentWidget *> &filterContentWidgets = ftw->fbw()->filterContentWidgets();

      int foundMainTrackEntryId = -1;
      for (auto itFcw = filterContentWidgets.begin(); itFcw != filterContentWidgets.end(); ++itFcw)
      {
        const TrackContentWidget *tcw = itFcw.value();
        const QVector<TrackEntry *> &trackEntries = tcw->getTrackEntries();

        for (const TrackEntry *tempFilterTe : trackEntries)
        {
          if (tempFilterTe->m_topicId == te->m_topicId)
          {
            foundMainTrackEntryId = itFcw.key(); // filter's parent main widget found !!1
            break;
          }
        }
        if (foundMainTrackEntryId != -1)
          break;
      }

      if (foundMainTrackEntryId != -1)
      {
        const QVector<TrackEntry *> &trackEntries = tw->getTrackContentWidget()->getTrackEntries();
        for (const TrackEntry *mainTe : trackEntries)
        {
          if (mainTe->m_topicId == foundMainTrackEntryId)
            return mainTe->m_startTime + te->m_startTime;
        }
      }
    }
  }

  return -1;
}


QList<TrackWidget *> ScriptTimeline::getTrackWidgets() const
{
  return ui->trackScrollArea->findChildren<TrackWidget *>();
}


TrackEntry *ScriptTimeline::getTrackEntryWithFiltersAsEntries(int topicId)
{
  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (const TrackWidget *tw : trackWidgetList)
  {
    const QVector<TrackEntry *> trackEntries = tw->getTrackEntriesFiltersAsEntries();
    for (TrackEntry *te : qAsConst(trackEntries))
    {
      if (te->m_topicId == topicId)
        return te;
    }
  }

  return nullptr;
}


TrackEntry *ScriptTimeline::getTrackEntry(int topicId)
{
  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (const TrackWidget *tw : trackWidgetList)
  {
    const QVector<TrackEntry *> trackEntries = tw->getTrackEntries();
    for (TrackEntry *te : trackEntries)
    {
      if (te->m_topicId == topicId)
        return te;
    }
  }

  return nullptr;
}


QVector<TrackEntry *> ScriptTimeline::getTrackEntriesWithFiltersAsEntries(bool selectedEntriesOnly) const
{
  QVector<TrackEntry *> tes;
  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (TrackWidget *tw : trackWidgetList)
    tes += tw->getTrackEntriesFiltersAsEntries(selectedEntriesOnly);

  return tes;
}


QMap<QString, QVector<TrackEntry *> > ScriptTimeline::getTrackEntriesWithFilters(bool selectedEntriesOnly) const
{
  QMap<QString, QVector<TrackEntry *> > trackList;
  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (const TrackWidget *tw : trackWidgetList)
  {
    QString trackName(tw->trackName());
    const QVector<TrackEntry *> trackEntries = tw->getTrackEntriesWithFilters(selectedEntriesOnly);

    trackList.insert(trackName, trackEntries);
  }

  return trackList;
}


QVector<TrackEntry *> ScriptTimeline::getTrackEntries(bool selectedEntriesOnly) const
{
  QVector<TrackEntry *> tes;
  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (const TrackWidget *tw : trackWidgetList)
    tes += tw->getTrackEntries(selectedEntriesOnly);

  return tes;
}


bool ScriptTimeline::importTrackEntries(const QVector<LtsScriptTimeline::TrackEntry *> &importTes)
{
  // 1. calculate the length of all tes from importTes together
  int importLength = 0;
  for (TrackEntry *te : qAsConst(importTes))
  {
    int teLen = te->m_startTime + te->m_length;
    if (teLen > importLength)
      importLength = teLen;
  }


  // 2. get the time from when all topics should be moved to after the imported script
  const QVector<TrackEntry *> tes = getTrackEntries();
  int pasteTime = m_time;

  for (TrackEntry *te : qAsConst(tes))
  {
    int start = te->m_startTime;
    int sum = start + te->m_length;

    if (start < m_time
        && sum > m_time
        && pasteTime < sum)
    {
      pasteTime = sum;
    }
  }

  int diff = pasteTime - m_time; // because there (can) be space that is skipped (because of intersecting topics), this space has to be added, too


  // 3. move all tes at m_time and later by the sum length calculated by '1.' & '2.'
  for (TrackEntry *te : qAsConst(tes))
  {
    if (te->m_startTime >= m_time)
      te->m_startTime += importLength + diff;
  }


  // 4. set import tes start times by adding an offset (indicator_pos) and finally add it to the script
  QVector<LtsScriptTimeline::TrackEntry *> finalImportTes(importTes); // copy to make it editable! (NOTE: at this point the tes must not be deleted anymore as they are added to the script timeline) - which means that the temp vector must not discard

  for (TrackEntry *te : finalImportTes)
  {
    // 3.1 set start time
    te->m_startTime += pasteTime;

    // 3.1 finally add te
    if (!addTopic(te))
    {
      qCritical() << "could not add te #" << te->m_topicId;
      delete te; // that's okay because the temp vector must not discard anymore (so no double free)
    }
  }


  // 5. set new indicator time to show the user where the script really has been imported to (skipped all intersecting topics)
  m_time = pasteTime;
  setIndicatorTime(m_time);


  return true;
}


bool ScriptTimeline::addTopic(TrackEntry *te)
{
  if (te->m_topicId == 0)
    te->m_topicId = nextUniqueId();

  if (te->m_channelName.isEmpty())
    te->m_channelName = tr("Unnamed Track");

  te->isSet = true; // added = isSet

  // find (or create) track and add new entry to it
  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (TrackWidget *tw : trackWidgetList)
  {
    if (tw->trackName() == te->m_channelName)
    {
      m_ignoreChanges = true;
      bool result = tw->addTrackEntry(te, false);
      m_ignoreChanges = false;

      if (!result)
        return false;

      tw->updateMe();
      return true;
    }
  }

  // tw not found..
  return false;
}


QVector<TrackEntry *> ScriptTimeline::getSelectedEntriesWithFilterEntries() const
{
  QVector<TrackEntry *> tes;

  const QList<TrackWidget *> tws = getTrackWidgets();

  for (const TrackWidget *tw : qAsConst(tws))
    tes += tw->getTrackEntriesFiltersAsEntries(true);

  return tes;
}


QString ScriptTimeline::newTrackName() const
{
  QString newTrackName;
  int add = 1;
  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  bool newTrackNameFound = false;
  while (!newTrackNameFound)
  {
    newTrackNameFound = true;
    newTrackName = tr("New Track %1").arg(add);
    for (const TrackWidget *tw : trackWidgetList)
    {
      if (tw->trackName() == newTrackName)
      {
        // found the same name, start over
        add++;
        newTrackNameFound = false;
        break;
      }
    }
  }

  return newTrackName;
}


void ScriptTimeline::updateAllTracks()
{
  const QList<TrackWidget *> tws = getTrackWidgets();

  for (TrackWidget *tw : tws)
    tw->updateMe();
}


QVector<TrackEntry *> ScriptTimeline::getSelectedFilterEntries() const
{
  QVector<TrackEntry *> result;

  const QList<TrackWidget *> tws = getTrackWidgets();
  for (const TrackWidget *tw : qAsConst(tws))
  {
    result += tw->getSelectedFilterEntries();
  }

  return result;
}


void ScriptTimeline::slotDeleteSelectedTopics()
{
  int topicCount = 0;

  const QList<TrackWidget *> tws = getTrackWidgets();
  for (const TrackWidget *tw : qAsConst(tws))
  {
    topicCount += tw->getSelectedFilterEntries().count();

    TrackContentWidget *tcw = tw->getTrackContentWidget();
    topicCount += tcw->getSelectedEntries().count();
  }

  if (!topicCount)
  {
    QApplication::beep();
    return;
  }

  connect(new LtsWidgets::LtsMessageDialogNew(this, tr("Are you sure that you want to delete %1 topics?").arg(topicCount),
                                              QString(), LtsWidgets::Behaviour::Modal, LtsWidgets::Button::Yes | LtsWidgets::Button::No),
          &LtsWidgets::LtsMessageDialogNew::yes,
          this, [this]()
  {
    const QList<TrackWidget *> tws = getTrackWidgets();
    for (const TrackWidget *tw : qAsConst(tws))
    {
      // delete all selected filter topics
      const QVector<FilterTrackWidget *> &ftws = tw->filterLines();

      for (const FilterTrackWidget *ftw : qAsConst(ftws))
      {
        const FilterBackgroundWidget *fbw = ftw->fbw();
        const QMap<int /*id*/, TrackContentWidget *> &fcws = fbw->filterContentWidgets();

        for (TrackContentWidget *tcw: fcws)
          tcw->deleteSelectedTopics();
      }

      TrackContentWidget *tcw = tw->getTrackContentWidget();
      tcw->deleteSelectedTopics();
    }
  });
}


void ScriptTimeline::slotCutTopics()
{
  slotCopyTopics();

  const QList<TrackWidget *> tws = getTrackWidgets();
  for (const TrackWidget *tw : qAsConst(tws))
  {
    TrackContentWidget *tcw = tw->getTrackContentWidget();
    tcw->deleteSelectedTopics();
  }
}


void ScriptTimeline::slotCopyTopics()
{
  const QList<TrackWidget *> tws = getTrackWidgets();
  int firstTeTime = -1;


  // get firstTeTime first
  for (const TrackWidget *tw : qAsConst(tws))
  {
    TrackContentWidget *tcw = tw->getTrackContentWidget();

    const QVector<TrackEntry *> &selected = tcw->getSelectedEntries(); // filters can be ignored at this point, check (main) times only

    if (tcw->getSelectedEntries().isEmpty())
      continue;

    for (const TrackEntry *te : qAsConst(selected))
    {
      if (firstTeTime > te->m_startTime || firstTeTime == -1)
        firstTeTime = te->m_startTime;
    }
  }

  if (firstTeTime == -1) // not set = no selected topics
  {
    QApplication::beep();
    return;
  }

  // there is something to copy, clear old vector before
  m_copyTopics.clear();


  // finally copy with firstTeTime
  for (TrackWidget *tw : tws)
  {
    TrackContentWidget *tcw = tw->getTrackContentWidget();

    if (tcw->getSelectedEntries().isEmpty())
      continue;

    // for security reasons:
    connect(tw, &QObject::destroyed,
            this, [this](QObject *obj)
    {
      m_copyTopics.remove(static_cast<TrackWidget *>(obj));
    });

    m_copyTopics.insert(tw, TrackContentWidget::itemsToData(tw->getTrackEntriesWithFilters(true), firstTeTime, false));
  }
}


void ScriptTimeline::slotPasteTopics()
{
  if (m_copyTopics.isEmpty() || m_time < 0)
  {
    QApplication::beep();
    return;
  }

  // test if all tcws can paste there
  for (auto i = m_copyTopics.constBegin(); i != m_copyTopics.constEnd(); ++i)
  {
    const TrackWidget *tw = i.key();
    const QByteArray &data = i.value();

    TrackContentWidget *tcw = tw->getTrackContentWidget();
    int dummy = 0;
    const TemporaryPointerVector<TrackEntry *> tempTes(TrackContentWidget::dataToItems(data, dummy));
    if (!tcw->canPasteTopics(tempTes, 0, m_time))
    {
      new LtsWidgets::LtsMessageDialogNew(this, tr("Topics can't be pasted here as one or more topics intersects with another existing topic."));
      return;
    }
  }

  // paste now if not failed
  for (auto i = m_copyTopics.constBegin(); i != m_copyTopics.constEnd(); ++i)
  {
    TrackWidget *tw = i.key();
    TrackContentWidget *tcw = tw->getTrackContentWidget();
    const QByteArray &data = i.value();

    int dummy = 0;
    const TemporaryPointerVector<TrackEntry *> tempTes(TrackContentWidget::dataToItems(data, dummy));
    tcw->forcePasteTopics(tempTes, 0, m_time);
  }
}


void ScriptTimeline::slotMoveAll(int direction)
{
  int factor = 1;

  if (!QGuiApplication::keyboardModifiers().testFlag(Qt::ControlModifier))
    factor = 10;

  QList<TrackWidget *> tws = getTrackWidgets();

  // first test if all tcws can move
  for (TrackWidget *tw : qAsConst(tws))
  {
    TrackContentWidget *tcw = tw->getTrackContentWidget();
    if (!tcw->canMoveAll(direction * factor))
    {
      QApplication::beep();
      qWarning() << "cols and/or parls @" << tcw;
      return;
    }
  }

  // if not failed, finally move all
  for (TrackWidget *tw : qAsConst(tws))
  {
    TrackContentWidget *tcw = tw->getTrackContentWidget();
    tcw->forceMoveAll(direction * factor);
  }
}


static inline bool containsFailedTrackContentWidget(const QHash<TrackContentWidget *, bool> &mlmsTCWStates)
{
  auto end = mlmsTCWStates.end();
  for (auto it = mlmsTCWStates.begin(); it != end; ++it)
  {
    if (it.value() == false)
      return true;
  }
  return false;
}

TrackWidget *ScriptTimeline::addTrack(const QString &name, bool filtersAllowed)
{
  TrackWidget *tw = new TrackWidget(m_baseTrackWidgetWidth, m_readonly, m_tools, filtersAllowed);
  tw->setScriptTimeline(this);
  tw->setTrackName(name);

  ui->trackLayout->insertWidget(1, tw); // after indicator

  connect(tw, &TrackWidget::signalTrackEntrySelectionChanged,
          this, &ScriptTimeline::slotTrackEntrySelectionChanged);
  connect(tw, &TrackWidget::signalTrackEntryDeleted,
          this, &ScriptTimeline::signalTrackEntryDeleted);
  connect(tw, &TrackWidget::signalUnselectAll,
          this, &ScriptTimeline::slotUnselectAll);
  connect(tw, &TrackWidget::signalSelectTrack,
          this, &ScriptTimeline::slotSelectTrack);
  connect(tw, &TrackWidget::signalChangesMade,
          this, &ScriptTimeline::signalChangesMade);
  connect(tw, &TrackWidget::signalEditEntry,
          this, &ScriptTimeline::signalEditEntry);

  TrackContentWidget *tcw = tw->getTrackContentWidget();

  connect(tcw, &TrackContentWidget::signalStartRubberband,
          this, &ScriptTimeline::slotStartRubberband);
  connect(tcw, &TrackContentWidget::signalStopRubberband,
          this, &ScriptTimeline::slotStopRubberband);
  connect(tcw, &TrackContentWidget::signalEscapeRubberband,
          this, &ScriptTimeline::slotEscapeRubberband);
  connect(tcw, &TrackContentWidget::signalModifyRubberband,
          this, &ScriptTimeline::slotModifyRubberband);
  connect(tcw, &TrackContentWidget::signalSelectAllGlobal,
          this, &ScriptTimeline::selectAll);
  connect(tcw, &TrackContentWidget::signalCopyTopics,
          this, &ScriptTimeline::slotCopyTopics);
  connect(tcw, &TrackContentWidget::signalPasteTopics,
          this, &ScriptTimeline::slotPasteTopics);
  connect(tcw, &TrackContentWidget::signalCutTopics,
          this, &ScriptTimeline::slotCutTopics);
  connect(tcw, &TrackContentWidget::signalDeleteSelectedTopics,
          this, &ScriptTimeline::slotDeleteSelectedTopics);
  connect(tcw, &TrackContentWidget::signalSave,
          this, &ScriptTimeline::signalSave);
  connect(tcw, &TrackContentWidget::signalMoveAll,
          this, &ScriptTimeline::slotMoveAll);
  connect(tcw, &TrackContentWidget::signalScroll,
          this, &ScriptTimeline::slotScroll);



  connect(tcw, &TrackContentWidget::signalMultiLineMultiSelectionFailed, // can be sent by any tcw
          this, [this]()
  {
    TrackContentWidget *senderTcw = qobject_cast<TrackContentWidget *>(sender());

    if (senderTcw == nullptr)
      return;

    m_mlmsTCWStates.insert(senderTcw, false);

    const QList<TrackWidget *> tws = getTrackWidgets();

    for (TrackWidget *tw : tws)
    {
      // set all tcw's drags impossible
      TrackContentWidget *tcw = tw->getTrackContentWidget();
      tcw->setDragPossible(false); // NOTE: even on the sender
    }
  });


  connect(tcw, &TrackContentWidget::signalMultiLineMultiSelectionOkay, // can be sent by any tcw
          this, [this]()
  {
    // only set all tcw's drags possible again, every tcw has to have "drag possible" set to true
    // so last to call this okay slot will set

    TrackContentWidget *senderTcw = qobject_cast<TrackContentWidget *>(sender());

    if (senderTcw == nullptr)
      return;

    m_mlmsTCWStates.insert(senderTcw, true);

    if (containsFailedTrackContentWidget(m_mlmsTCWStates)) // any failed TCWs left? then stop
      return;

    // .. otherwise, finally, set all TCWs drag possible again

    const QList<TrackWidget *> tws = getTrackWidgets();

    for (TrackWidget *tw : tws)
    {
      TrackContentWidget *tcw = tw->getTrackContentWidget();

      if (tcw == senderTcw)
        continue;

      tcw->setDragPossible(true);
    }
  });


  connect(tcw, &TrackContentWidget::signalMultiLineMultiSelectionDone, // can only be sent by mlms master tcw
          this, [this](int dropPos)
  {
    TrackContentWidget *senderTcw = qobject_cast<TrackContentWidget *>(sender());

    if (senderTcw == nullptr)
      return;

//    if (senderTcw != m_mlmsMaster)
//      return;

    const QList<TrackWidget *> tws = getTrackWidgets();

    for (TrackWidget *tw : tws)
    {
      TrackContentWidget *tcw = tw->getTrackContentWidget();

      if (tcw == senderTcw)
        continue;

      if (containsFailedTrackContentWidget(m_mlmsTCWStates) || dropPos == -1) // any failed TCWs left? then stop
      {
        QApplication::beep();
        tcw->dragEnd();
      }
      else
        tcw->dragDrop(dropPos);//senderTcw->getDropPos());
    }

    m_mlmsMaster = nullptr;
    m_mlmsTCWStates.clear();
    m_ignoreChanges = false; // reactivate

    updateAllTracks();
  });


  connect(tcw, &TrackContentWidget::signalMultiLineMultiSelectionMove, // can only be sent by mlms master tcw
          this, [this](int x)
  {
    TrackContentWidget *senderTcw = qobject_cast<TrackContentWidget *>(sender());

    if (senderTcw == nullptr)
      return;

    // only the master sends, so, not needed
    if (senderTcw != m_mlmsMaster)
      return;

    const QList<TrackWidget *> tws = getTrackWidgets();

    for (TrackWidget *tw : tws)
    {
      TrackContentWidget *tcw = tw->getTrackContentWidget();

      if (tcw == senderTcw)
        continue;

      tcw->dragMove(x);
    }
  });


  connect(tcw, &TrackContentWidget::signalMultiLineMultiSelectionStart, // can only be sent by mlms master
          this, [this](int dragPosTime)
  {
    if (m_mlmsMaster != nullptr) // already started
      return;

    TrackContentWidget *senderTcw = qobject_cast<TrackContentWidget *>(sender());

    if (senderTcw == nullptr)
      return;

    m_mlmsMaster = senderTcw;
    m_ignoreChanges = true; // otherwise mlms mode will exit when selection is "altered in a bad way"

    const QList<TrackWidget *> tws = getTrackWidgets();

    for (TrackWidget *tw : tws)
    {
      TrackContentWidget *tcw = tw->getTrackContentWidget();

      if (tcw == senderTcw)
        continue;

      tcw->dragEnter(tcw->selectedItemsToData(dragPosTime));
    }
  });


  return tw;
}


void ScriptTimeline::slotEscapeRubberband()
{
  if (m_rubberbandAction.rubberBand == nullptr)
    return;

  m_rubberbandAction.rubberBand->deleteLater();
}


void ScriptTimeline::slotStopRubberband()
{
  if (m_rubberbandAction.rubberBand == nullptr)
    return;

  QRect geo(m_rubberbandAction.rubberBand->geometry());

  m_rubberbandAction.rubberBand->deleteLater();

  if (m_readonly)
    return;

  QPoint rubberbandLength = geo.topLeft() - geo.bottomRight();
  if (rubberbandLength.manhattanLength() <= 6) // don't do anything if cursor didn't move significantly much
    return;


  const QList<TrackWidget *> tws = getTrackWidgets();
  for (TrackWidget *tw : tws)
  {
    TrackContentWidget *tcw = tw->getTrackContentWidget();

    QRect tcwGeo(tcw->geometry());
    QPoint topLeft(tcw->mapTo(this, tcwGeo.topLeft()));
    QPoint bottomRight(tcw->mapTo(this, tcwGeo.bottomRight()));

    if (QRect(topLeft, bottomRight).intersects(geo))
    {
      QPoint tcwTL(tcw->mapFrom(this, geo.topLeft()));
      QPoint tcwBR(tcw->mapFrom(this, geo.bottomRight()));

      int fromPos = tcwTL.x();
      int toPos   = tcwBR.x();

      tcw->selectEntriesAtPositions(fromPos, toPos);
    }
  }
}


void ScriptTimeline::slotStartRubberband(const QPoint &)
{
  if (m_readonly)
    return;

  if (m_rubberbandAction.rubberBand == nullptr)
  {
    QPoint cursorPos(mapFromGlobal(QCursor::pos()));
    m_rubberbandAction.origin = cursorPos;
    m_rubberbandAction.rubberBand = new QRubberBand(QRubberBand::Rectangle, this);

    m_rubberbandAction.rubberBand->setGeometry(QRect(cursorPos, QSize()));
    m_rubberbandAction.rubberBand->show();
  }
}

void ScriptTimeline::slotModifyRubberband()
{
  if (!m_rubberbandAction.rubberBand)
    return;

  m_rubberbandAction.rubberBand->setGeometry(QRect(m_rubberbandAction.origin, mapFromGlobal(QCursor::pos())).normalized());
}


void ScriptTimeline::slotTrackEntrySelectionChanged(TrackEntry *)
{
  if (m_ignoreChanges)
    return;

  const QList<TrackWidget *> tws = getTrackWidgets();

  // activate mlms mode if more than 1 tw has selection(s)
  bool hasSelections = false;
  bool activateMultiLineMultiSelectionMode = false;
  for (const TrackWidget *tw : tws)
  {
    if (!hasSelections)
    {
      if (!tw->getSelectedEntries().isEmpty() || !tw->getSelectedFilterEntries().isEmpty())
        hasSelections = true;
    }
    else if (!tw->getSelectedEntries().isEmpty()) // here are selections, too
    {
      // more than 1 tw has selections, activate multi line multi selection mode !
      activateMultiLineMultiSelectionMode = true;
      break;
    }
  }

  // de-/activate mlms mode
  for (TrackWidget *tw : qAsConst(tws))
    tw->getTrackContentWidget()->setMultiLineMultiSelectionMode(activateMultiLineMultiSelectionMode);

  emit signalTrackEntrySelectionChanged(nullptr); // forward to subscribers
}


void ScriptTimeline::slotSelectTrack()
{
  const QList<TrackWidget *> trackWidgetList = getTrackWidgets();
  for (const TrackWidget *tw : trackWidgetList)
  {
    if (tw->isSelected())
    {
      //ui->pbDeleteTracks->setEnabled(true);
      return;
    }
  }

  //ui->pbDeleteTracks->setEnabled(false); // none selected, as the code comes here
}


void ScriptTimeline::updateEverything()
{
  //qWarning() << "updateEverything";

  // update tools' width
  TrackWidget *tw  = ui->trackScrollArea->findChild<TrackWidget *>(); // get one, unspecific tw (doesn't matter which, because they all have the same length)

  if (tw != nullptr)
    m_tools->m_paintWidth = tw->width();

  ui->indicator->updateMe();

  updateAllTracks();
  update();
}


void ScriptTimeline::slotScrollbarValueChanged()
{
  m_tools->m_scrollPos = ui->trackScrollBar->value();

  updateEverything();
}
} // namespace LtsScriptTimeline