#include "lts_msec_date_time_edit.h"


namespace LtsWidgets
{

LtsMSecDateTimeEdit::LtsMSecDateTimeEdit(QWidget *parent)
  : QDateTimeEdit(parent)
{
  setWrapping(true);
  setDisplayFormat(QLatin1String("dd.MM.yy HH:mm:ss.zzz"));
  connect(this, &LtsMSecDateTimeEdit::editingFinished, this, &LtsMSecDateTimeEdit::onEditingFinished);
}

LtsMSecDateTimeEdit::LtsMSecDateTimeEdit(const QDateTime &dt, QWidget *parent)
  : QDateTimeEdit(dt, parent)
{
  setWrapping(true);
  setDisplayFormat(QLatin1String("dd.MM.yy HH:mm:ss.zzz"));
  connect(this, &LtsMSecDateTimeEdit::editingFinished, this, &LtsMSecDateTimeEdit::onEditingFinished);
}

LtsMSecDateTimeEdit::LtsMSecDateTimeEdit(const QDate &d, QWidget *parent)
  : QDateTimeEdit(d, parent)
{
  setWrapping(true);
  setDisplayFormat(QLatin1String("dd.MM.yy HH:mm:ss.zzz"));
  connect(this, &LtsMSecDateTimeEdit::editingFinished, this, &LtsMSecDateTimeEdit::onEditingFinished);
}

LtsMSecDateTimeEdit::LtsMSecDateTimeEdit(const QTime &t, QWidget *parent)
  : QDateTimeEdit(t, parent)
{
  setWrapping(true);
  setDisplayFormat(QLatin1String("dd.MM.yy HH:mm:ss.zzz"));
  connect(this, &LtsMSecDateTimeEdit::editingFinished, this, &LtsMSecDateTimeEdit::onEditingFinished);
}

void LtsMSecDateTimeEdit::stepBy(int steps)
{
  switch (currentSection()) {
  case QDateTimeEdit::MonthSection:
    QDateTimeEdit::setDateTime(dateTime().addMonths(steps));
    break;
  case QDateTimeEdit::YearSection:
    QDateTimeEdit::setDateTime(dateTime().addYears(steps));
    break;
  case QDateTimeEdit::DaySection:
    QDateTimeEdit::setDateTime(dateTime().addDays(steps));
    break;
  case QDateTimeEdit::HourSection:
    QDateTimeEdit::setDateTime(dateTime().addSecs(steps * 3600));
    break;
  case QDateTimeEdit::MinuteSection:
    QDateTimeEdit::setDateTime(dateTime().addSecs(steps * 60));
    break;
  case QDateTimeEdit::SecondSection:
    QDateTimeEdit::setDateTime(dateTime().addSecs(steps));
    break;
  case QDateTimeEdit::MSecSection:
    QDateTimeEdit::setDateTime(dateTime().addMSecs(steps * m_msecStepSize));
    break;
  case QDateTimeEdit::NoSection:
  case QDateTimeEdit::AmPmSection:
  case QDateTimeEdit::TimeSections_Mask:
  case QDateTimeEdit::DateSections_Mask:
  default:
    break;
  }
}

qint64 LtsMSecDateTimeEdit::msecsSinceEpoch() const
{
  return dateTime().toMSecsSinceEpoch() - (m_timezoneHoursOffset * 3600 * 1000); 
}

void LtsMSecDateTimeEdit::setTimezoneHoursOffset(int timezoneHoursOffset)
{
  qint64 b4 = msecsSinceEpoch();
  m_timezoneHoursOffset = timezoneHoursOffset; 
  setMsecsSinceEpoch(b4); 
}

void LtsMSecDateTimeEdit::setDateTime(const QDateTime &dateTime)
{
  
  setMsecsSinceEpoch(QDateTime::fromMSecsSinceEpoch(dateTime.toMSecsSinceEpoch(), Qt::TimeSpec::OffsetFromUTC, m_timezoneHoursOffset * 3600).toMSecsSinceEpoch());
}

void LtsMSecDateTimeEdit::setMsecsSinceEpoch(qint64 msecs)
{
  QDateTimeEdit::setDateTime(QDateTime::fromMSecsSinceEpoch(msecs, Qt::TimeSpec::OffsetFromUTC, m_timezoneHoursOffset * 3600));
}

int LtsMSecDateTimeEdit::msecStepSize() const
{
  return m_msecStepSize;
}

void LtsMSecDateTimeEdit::setMsecStepSize(int msecStepSize)
{
  m_msecStepSize = msecStepSize;
}

void LtsMSecDateTimeEdit::onEditingFinished()
{
  qint64 val = msecsSinceEpoch();
  if (val % m_msecStepSize == 0)
    return;
  val = (val + (m_msecStepSize/2) ) / m_msecStepSize * m_msecStepSize;
  setMsecsSinceEpoch(val);
}

}