// TODO: hdr

#include "lts_notification_ctl.h"

#include <QToolButton>
#include <QImage>
#include <QPainter>
#include <QIcon>
#include <QColor>
#include <QDebug>


namespace LtsNotification
{

LtsNotificationController::LtsNotificationController(const QString &identifier)
  : QObject()
  , m_count(0)
  , m_identifier(QStringLiteral("LtsNotification%1").arg(identifier))
{}


LtsNotificationController::~LtsNotificationController()
{
  qDeleteAll(m_notiList);
}


void LtsNotificationController::setIcon(const QIcon& icon)
{
  m_icon = icon;

  setAllIcons();
}


void LtsNotificationController::setCount(const int count)
{
  m_count = count;

  setAllIcons();
}
/*!
 * \brief LtsNotificationController::setBackground
 * \param r red
 * \param g green
 * \param b yellow
 * \author Niklas Schmidt
 * \details If all params(r,g,b) are -1, than reset Stylesheet = non stylesheet
 */
//TODO: Extra function resetBackground instead of -1 params
void LtsNotificationController::setBackground(const int r, const int g, const int b)
{

  for (QToolButton *tb : qAsConst(m_notiList))
  {

    QString stylesheet;

    if(r == -1 && g == -1 && b == -1)
      stylesheet = QStringLiteral("");
    else
     stylesheet = QStringLiteral("QToolButton {background-color: rgb(") +
        QString::number(r) + QStringLiteral(",") +
        QString::number(g) + QStringLiteral(",") +
        QString::number(b) + QStringLiteral(");}");

    tb->setStyleSheet(stylesheet);
  }
}

void LtsNotificationController::setEnabled(bool enable)
{
  m_enable = enable;

  setAllIcons();
}


void LtsNotificationController::setAction(const std::function<void(void)> &action)
{
  m_action = action;
}


void LtsNotificationController::setToolTip(const QString &toolTip)
{
  m_toolTip = toolTip;

  for (QToolButton *tb : qAsConst(m_notiList))
  {
    tb->setToolTip(toolTip);
    tb->setIconSize(QSize(30,30));
  }
}


void LtsNotificationController::setAllIcons()
{
  if (m_icon.isNull())
    return;

  // prepare new Icon (add count), then set to all ToolButtons
  QIcon icon = modifyIcon(m_icon);

  for (QToolButton *tb : qAsConst(m_notiList))
  {
    tb->setIcon(icon);
    tb->setIconSize(QSize(30,30));
    tb->setEnabled(m_enable);
  }
}


#define SIZE 40

QIcon LtsNotificationController::modifyIcon(const QIcon &icon) // TODO: automatic advanced scope ??!
{
  /* FIXME: it is impossible to check if QIcon is valid, so calling modifyIcon will start
   * a painter on an invalid QPixmap (hence the QIcon) which produces error messages in
   * the log file & stdout.
   */

  if (m_count < 1) // do not draw '0' on it..
    return icon;

  QPixmap iconImage(icon.pixmap(SIZE * 8 / 10, SIZE * 8 / 10));
  QPainter painter(&iconImage);

  painter.save();
  painter.setRenderHints(QPainter::TextAntialiasing | QPainter::Antialiasing | QPainter::HighQualityAntialiasing | QPainter::SmoothPixmapTransform);

  QFont f;
  f.setFamily(QStringLiteral("Monospace"));
  f.setPointSize(16);
  f.setBold(true);
  painter.setFont(f);

  QColor color(Qt::red);
  painter.setBrush(color);
  painter.setPen(QPen(color, 3.1));
  painter.drawText(QRect(0, 0, 30, 30), QString::number(m_count)); // TODO: working version of this: , QTextOption(Qt::AlignRight | Qt::AlignBottom));
  painter.restore();

  return iconImage;
}


QToolButton *LtsNotificationController::createWidget()
{
  QToolButton *b = new QToolButton();
  b->setToolButtonStyle(Qt::ToolButtonIconOnly);
  b->setObjectName(m_identifier);
  //qWarning() << "object name" << b->objectName() << "==" << m_identifier;

  // FIXME: variable sizes !!  LtsDragIcon ?
  b->setMinimumSize(SIZE, SIZE);
  b->setMaximumSize(SIZE, SIZE);

  connect(b, &QToolButton::destroyed,
          this, &LtsNotificationController::slotNotiWidgetDestroyed);
  connect(b, &QToolButton::clicked,
          this, [this](){ if (m_action) m_action(); }); // TODO: FIXME: BAD, BAD HACK?!

  if (!m_icon.isNull())
    b->setIcon(modifyIcon(m_icon));

  b->setToolTip(m_toolTip);

  m_notiList.append(b);
  return b;
}


void LtsNotificationController::slotNotiWidgetDestroyed(QObject *obj)
{
  m_notiList.removeAll(static_cast<QToolButton*>(obj)); // no qobject_cast for destroyed objects
}

} // namespace LtsNotification