/**
 * @RDE_HEADER@
 * Helper Class, which manages a progress Dialog with two states.
 * $Id$
 * $HeadURL$
 * $Author$
 *
 * Created by Mike Wille, SLSE, 2016-06-20
 */

#include "lts_progress_dialog_helper.h"

#include "lts_frameless_dialog.h"

#include <QCoreApplication>
#include <QHBoxLayout>
#include <QLabel>
#include <QProgressBar>
#include <QPushButton>
#include <QTimer>


namespace LtsWidgets
{

LtsProgressDialogHelper::LtsProgressDialogHelper(QWidget *parent)
  : QObject(parent)
  , m_waitDlg(nullptr) // save mem
  , m_parentWidget(parent)
  , m_textLabel(nullptr)
{}


LtsProgressDialogHelper::~LtsProgressDialogHelper()
{
  delete m_waitDlg;
}


void LtsProgressDialogHelper::setCustomText(const QString &customText)
{
  if (m_waitDlg == nullptr || m_textLabel == nullptr)
    return;

  if (customText.isEmpty())
    m_textLabel->setText(tr("Waiting for server reply..."));
  else
    m_textLabel->setText(customText);
}

void LtsProgressDialogHelper::setParentWidget(QWidget *newParent)
{
  m_parentWidget = newParent;
  if (m_waitDlg)
  {
    m_waitDlg->setParent(newParent);
    QTimer::singleShot(0, m_waitDlg.data(), &LtsFramelessDialog::onUpdateGeometry);
  }
}

void LtsProgressDialogHelper::slotShowWaitForReplyWindow()
{
  if (m_waitDlg)
    m_waitDlg->deleteLater(); //delete m_waitDlg; // when there is already an instance
  m_waitDlg = new LtsFramelessDialog(m_parentWidget, Behaviour::Modal);

  QHBoxLayout *l = new QHBoxLayout(m_waitDlg);

  QProgressBar *pb = new QProgressBar(m_waitDlg);
  pb->setMaximum(0);
  pb->setValue(-1);

  l->addWidget(pb);

  m_textLabel = new QLabel(m_waitDlg);
  setCustomText();
  l->addWidget(m_textLabel);

  m_waitDlg->setLayout(l);
  m_waitDlg->show();
  m_waitDlg->raise(); // TODO: needed when StyOnTop is active ?

  //QCoreApplication::processEvents(); // do not look glitched if dds hangs
}


void LtsProgressDialogHelper::slotStopWaitForReplyWindow(const ReplyResult &replyResult, const QString &replyString)
{
  if (m_waitDlg == nullptr)
  {
    // TODO: debug/warning that there is no wait dlg..
    return;
  }

  //qDeleteAll(m_waitDlg->children()); // delete the layout and it's children
  m_waitDlg->deleteLater(); // the easiest way
  m_waitDlg = nullptr;

  // .. a new layout, telling the reply result
  QString resultText = tr("Unknown result (%1)!").arg((int)replyResult);

  switch (replyResult)
  {
    case ReplyResult::Close:
    {
      return; // say nothing, just close
    }

    case ReplyResult::Success:
    {
      resultText = tr("Operation was successful");
      break;
    }

    case ReplyResult::Failure:
    {
      resultText = tr("Operation has failed!\nReason: '%1'").arg(replyString);
      break;
    }

    case ReplyResult::TimeOut:
    {
      resultText = tr("Operation has timed out and could not be processed! Please try again later");
      break;
    }
  }

  m_waitDlg = new LtsFramelessDialog(m_parentWidget, Behaviour::Modal);

  QVBoxLayout *newLayout = new QVBoxLayout(m_waitDlg);
  newLayout->addWidget(new QLabel(resultText, m_waitDlg));

  QPushButton *btn = new QPushButton(tr("OK"),m_waitDlg);
  connect(btn, &QPushButton::clicked,
          this, &LtsProgressDialogHelper::accept); // TODO: or close?

  newLayout->addWidget(btn);

  m_waitDlg->setLayout(newLayout);
  m_waitDlg->show();

  //QCoreApplication::processEvents(); // do not look glitched if dds hangs
}


void LtsProgressDialogHelper::accept()
{
  m_waitDlg->accept();
  m_waitDlg->deleteLater();
  m_waitDlg = nullptr;
  emit accepted();
}

} // namespace LtsWidgets