#include "viewermainwindow.h"
#include "viewwidget.h"
#include "viewerinterfaceimpl.h"

#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>


namespace VCtrl
{

////////////////////////////////////////////////////////////////////////////////
TransparencyDialog::TransparencyDialog(QWidget *parent)
  : QDialog(parent, Qt::WindowSystemMenuHint | Qt::WindowTitleHint)
{
  setWindowTitle(tr("BgViewer - Set Global Transparency"));

  auto plabel = new QLabel(tr("Set transparency value:"));
  m_pSlider = new QSlider(Qt::Horizontal);
  m_pSlider->setMinimum(0);
  m_pSlider->setMaximum(100);
  m_pSlider->setValue(50);
  m_pSlider->setMinimumWidth(200);

  auto pButton = new QPushButton(tr("Apply"));
  connect(pButton, &QPushButton::clicked, this, &VCtrl::TransparencyDialog::accept);


  auto pLayout = new QHBoxLayout(this);
  pLayout->addWidget(plabel);
  pLayout->addWidget(m_pSlider);
  pLayout->addWidget(pButton);
  pLayout->setSizeConstraint(QLayout::SetFixedSize);
}

////////////////////////////////////////////////////////////////////////////////
CtrlMainWindow::CtrlMainWindow(QWidget *parent)
  : QWidget(parent)
{
  connect(&m_highlighterTimer, &QTimer::timeout,
          this, &CtrlMainWindow::onHighlighterTimerTimeout);
  setWindowTitle(tr("BgViewer"));
  // Remove minimize/maximize and close button
  setWindowFlags(Qt::Window | Qt::CustomizeWindowHint);

  new QGridLayout(this);
}


////////////////////////////////////////////////////////////////////////////////
void CtrlMainWindow::updateHighlightThreads(ViewWidget *pWidget)
{
  m_highlighterCounter[pWidget] = 6;
  if (!m_highlighterTimer.isActive())
    m_highlighterTimer.start(500);
}

////////////////////////////////////////////////////////////////////////////////
void CtrlMainWindow::onHighlighterTimerTimeout()
{
  auto it = m_highlighterCounter.begin();
  while (it != m_highlighterCounter.end())
  {
    ViewWidget *ww = it.key();
    ww->highlightBorder(it.value() % 2 == 0);
    it.value() = it.value() - 1;
    if (it.value() <= 0)
      it = m_highlighterCounter.erase(it);
    else
      ++it;
  }

  if (m_highlighterCounter.isEmpty())
    m_highlighterTimer.stop();
}


////////////////////////////////////////////////////////////////////////////////
void CtrlMainWindow::openView(ViewWidget *pViewWidget)
{
  openViews({pViewWidget});
}


////////////////////////////////////////////////////////////////////////////////
void CtrlMainWindow::openViews(const std::vector<ViewWidget *> &vecMainWindowSubWidgets)
{
  constexpr int maxViewsPerCol = 4;

  // Append where we stopped last time
  QGridLayout *gridLayout = static_cast<QGridLayout *>(layout());
  int row = gridLayout->count() / maxViewsPerCol, col = gridLayout->count() % maxViewsPerCol;

  // Add all requested ViewWidgets which are actually new
  for (auto &pWidget : vecMainWindowSubWidgets)
  {
    auto itm = gridLayout->itemAtPosition(row, col);
    if (itm && itm->widget() == pWidget)
      continue;
    gridLayout->addWidget(pWidget, row, col);
    pWidget->show();

    if (++col >= maxViewsPerCol)
    {
      col = 0;
      ++row;
    }
  }
}

void CtrlMainWindow::closeView(ViewWidget *pViewWidget)
{
  if (!pViewWidget)
    return;
  QGridLayout *gridLayout = dynamic_cast<QGridLayout *>(layout());
  std::vector<ViewWidget*> currentViews;
  currentViews.reserve(gridLayout->count());
  for (int idx = 0; idx < gridLayout->count(); idx++)
  {
    QLayoutItem *item = gridLayout->itemAt(idx);
    ViewWidget *vw = static_cast<ViewWidget*>(item->widget());
    if (vw != pViewWidget)
      currentViews.push_back(vw);
  }
  m_highlighterCounter.remove(pViewWidget);
  pViewWidget->close();

  delete gridLayout;
  setLayout(new QGridLayout);
  openViews(currentViews);
}


////////////////////////////////////////////////////////////////////////////////
void CtrlMainWindow::clearGridLayout()
{
  QGridLayout *gridLayout = dynamic_cast<QGridLayout *>(layout());
  for (int idx = 0; idx < gridLayout->count(); idx++)
  {
    QLayoutItem *item = gridLayout->itemAt(idx);
    item->widget()->hide();
  }
  m_highlighterCounter.clear();

  delete gridLayout;
  setLayout(new QGridLayout);
}
}