/**
  * @RDE_HEADER@
  * replaces the original header of the view - offers a user-movable position mark
  * $Id$
  * $HeadURL$
  * $Author$
  * Created by Mike Wille, SLSE, 2014-10-01
  */

#include "TimelineWidget.h"
#include "TimelineHeaderView.h"

#include <QPainter>
#include <QPainterPath>
#include <QPen>
#include <QPoint>
#include <QRect>
#include <QGuiApplication>


namespace LtsTimelineClassic
{

TimelineHeaderView::TimelineHeaderView(QWidget *parent)
  : QHeaderView(Qt::Horizontal, parent)
  , m_posMarkTime(0)
  , m_paintingRange(rect()) // has to be reset @ slotSectionResized
  , m_liveTime(0)
{
  setSectionsClickable(true);

  setStretchLastSection(true); // so that the whole viewport is filled with the last section (Event Section)

  connect(this, &TimelineHeaderView::sectionResized,
          this, &TimelineHeaderView::slotSectionResized);
  // now wait for slotSectionResized (which is definitly going to be called)
}

#define GET_LOGGER NGL::NGLLoggerBootstrap::getNGLRootLogger().getNGLLogger("Timeline.HeaderView")

void TimelineHeaderView::setPosMarkTime(qint64 time)
{
  m_posMarkTime = time;
  refreshData(); // new value, now recalc and show on view
}

void TimelineHeaderView::setLiveTime(qint64 time)
{
  m_liveTime = time;
  refreshData(); // new value, now recalc and show on view
}

void TimelineHeaderView::setPosMarkPos()
{
  //QRect sectionRect(0, 0, sectionSize(1), 0);

  if (m_posMarkTime > 0) // must be a valid time
  {
    int posMarkPos = EventTools::getEventPosition(m_posMarkTime);//, sectionRect);
    emit signalSetPosMarkPos(posMarkPos);
    refreshData();
  }
}

void TimelineHeaderView::refreshData()
{
  if (EventTools::getTimelineMin() > 0 && EventTools::getTimelineMax() > 1)
  {
    updateSection(1);
    updateSection(0); // because this section is often drawn on when position is very low
  }
}

void TimelineHeaderView::slotSectionResized(int logicalIndex, int oldSize, int newSize)
{
  (void)oldSize;

  if (logicalIndex == 1)
    m_paintingRange = QRect(0, 0, newSize, height());

  refreshData();
}

void TimelineHeaderView::paintSection(QPainter *painter, const QRect &rect, int logicalIndex) const
{
  painter->save(); // otherwise we can not draw.... dunno what paintSection does wrong
  QHeaderView::paintSection(painter, rect, logicalIndex);
  painter->restore(); // s.a.

  // draw posMark
  if (logicalIndex == 1)
  {
    int h = (rect.height() / 3);
    int y = rect.height() - h;
    int w = h;

    //QRect sectionRect(sectionPosition(1), 0, sectionSize(1), 0);

    painter->save();
    painter->setClipping(true);

    if (m_posMarkTime != 0) // if user changed posMark to a valid value
    {
      double posMark = EventTools::getEventPosition(m_posMarkTime);//, sectionRect);
      int x = /*sectionPosition(1)*/ + posMark;

      if (x >= sectionPosition(1))
      {
        painter->setPen(QPen(QGuiApplication::palette().color(QPalette::Inactive, QPalette::Highlight)));
        painter->setBrush(QGuiApplication::palette().highlight());

        QPolygon pol;
        pol.append(QPoint(x + (-w / 2), y + 0)); // p1
        pol.append(QPoint(x + 0,        y + h)); // p2
        pol.append(QPoint(x + (w / 2),  y + 0)); // p3
        pol.append(QPoint(x + (-w / 2), y + 0)); // p1

        QPainterPath path;
        path.moveTo(x, y);
        path.addPolygon(pol);

        painter->drawPath(path);
      }
    }


    if (m_liveTime != 0)
    {
      int posLive = EventTools::getEventPosition(m_liveTime);//, sectionRect);
      int x = posLive;

      if (x >= sectionPosition(1))
      {
        painter->setPen(QPen(QColor("green")));
        painter->setBrush(QBrush(QColor("green")));

        QPolygon pol;
        pol.append(QPoint(x + (-w / 2), y + 0)); // p1
        pol.append(QPoint(x + 0,        y + h)); // p2
        pol.append(QPoint(x + (w / 2),  y + 0)); // p3
        pol.append(QPoint(x + (-w / 2), y + 0)); // p1

        QPainterPath path;
        path.moveTo(x, y);
        path.addPolygon(pol);

        painter->drawPath(path);
      }
    }

    painter->restore();
  }
}

}