/***************************************************************************

  BionxControl
  © 2025 -2026 christoph holzheuer
  christoph.holzheuer@gmail.com

  Using:

  mhs_can_drv.c
  © 2011 - 2023 by MHS-Elektronik GmbH & Co. KG, Germany
  Klaus Demlehner, klaus@mhs-elektronik.de
  @see www.mhs-elektronik.de

  Based on Bionx data type descriptions from:

  BigXionFlasher USB V 0.2.4 rev. 97
  © 2011-2013 by Thomas Koenig <info@bigxionflasher.org>
  @see www.bigxionflasher.org

  Bionx Bike Info
  © 2018 Thorsten Schmidt (tschmidt@ts-soft.de)
  @see www.ts-soft.de

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 3 of the License, or
  (at your option) any later version.
  @see https://github.com/bikemike/bionx-bikeinfo

 ***************************************************************************/


#include <QSlider>
#include <QLabel>
#include <QHBoxLayout>
#include <QWidget>
#include <QDebug>
#include <QPainter>
#include <QTimer>

#include <QVariantAnimation>
#include <QPropertyAnimation>
#include <QPainter>

#include <bcdeviceview.h>
#include <bcvaluedelegate.h>
#include <bcvalueslider.h>
#include <bctoggleswitch.h>

BCValueDelegate::BCValueDelegate(const BCValueList& valueList, BCDeviceView* view)
    : QStyledItemDelegate{view}, _valueList{valueList}, _view{view}
{

}


QWidget* BCValueDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex& index) const
{

  Q_UNUSED(option)
  Q_UNUSED(index)

  const BCValue& bcValue = *(_valueList[ index.row() ].get());

  BCValue::ValueRange params;
  bool hasData = bcValue.hasValuesForSlider( params );

  qDebug() << " --- Create Editor: " << bcValue.label() << " value: " << params.value << " min: " << params.min << " max: " << params.max << " ratio:" << bcValue.calcMinMaxRatio()*100.0 << '%';

  if( bcValue.isBoolean() )
  {
    auto* toggleSwitch = new BCToggleSwitch{parent};
    toggleSwitch->setChecked(bcValue.isChecked() );

    // Signal für sofortige Updates
    connect(toggleSwitch, &BCToggleSwitch::toggled, this, [this, toggleSwitch](bool checked)
    {
      qDebug() << "--- toggled: " << checked;
      // Commit data sofort bei Änderung
      emit const_cast<BCValueDelegate*>(this)->commitData(toggleSwitch);
    });

    return toggleSwitch;
  }


  if( !hasData )
    return nullptr;

  auto* valueSlider = new BCValueSlider{parent};
  valueSlider->setValueAndRange( params );
  // Signal für sofortige Updates
  connect(valueSlider, &BCValueSlider::valueChanged, this, [this, valueSlider]()
  {
    // Commit data sofort bei Änderung
    emit const_cast<BCValueDelegate*>(this)->commitData(valueSlider);
  });
  return valueSlider;
}

void BCValueDelegate::setEditorData(QWidget *editor, const QModelIndex& index) const
{
  Q_UNUSED(editor)
  Q_UNUSED(index)

  // tue nix.

}


void BCValueDelegate::updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
  Q_UNUSED(index)

  const BCValue& bcValue = *(_valueList[ index.row()].get());
  QRect editorRect = bcValue.isBoolean() ? adjustEditorRect(option.rect, 0, 6, -130, -6) : adjustEditorRect(option.rect, 0, 0, 8, 0);
  editor->setGeometry(editorRect);
}


void BCValueDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex& index) const
{
  if (index.column() != 1)
    return;

  QVariant reValue;

  const BCValue& bcValue = *(_valueList[index.row()].get());
  if (bcValue.isBoolean())
  {
    if (BCToggleSwitch* toggleSswitch = qobject_cast<BCToggleSwitch*>(editor))
      reValue = toggleSswitch->isChecked() ? 1 : 0;
  }
  else
  {
    if (BCValueSlider* slider = qobject_cast<BCValueSlider*>(editor))
      reValue = slider->value();
  }
 
  model->setData(index, reValue, Qt::EditRole);

}


void BCValueDelegate::paint(QPainter *painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
  int row = index.row();
  if( index.column() != 1  || row<0 || row >= _valueList.size() )
    return;

  QStyleOptionViewItem opt = option;
  initStyleOption(&opt, index);

  const BCValue& bcValue = *(_valueList[ index.row()].get());

  if( bcValue.isBoolean() )
  {
    paintBooleanValue( painter, opt, bcValue );    
  }
  else
  {
    // Standard-Zeichnen (Text, Hintergrund, Selection) durchführen
    QStyledItemDelegate::paint(painter, opt, index);
  }

  if( !bcValue.isReadOnly()  )
  {
    // Wir zeichnen boolean Values an toggle switches
    if (bcValue.isBoolean())
    {
      //paintPlainToggleSwitch(painter, opt, bcValue);    
    }     
    else
    {
      paintPlainSliderIndicator(painter, opt.rect, bcValue.calcMinMaxRatio());
    }
      
  }

  if(_rowOpacities.contains(row))
    paintHighlightRow(painter, opt,index.row());

}

void BCValueDelegate::paintBooleanValue( QPainter *painter, const QStyleOptionViewItem& option, const BCValue& bcValue ) const
{

  QRect textRect = option.rect.adjusted( 2,0,0,0);

  // 3. Den tatsächlichen Wert aus dem Model auslesen
  QString text = bcValue.rawValue() == 1 ? BCTags::Yes : BCTags::No;

// 3. Die korrekte Textfarbe ermitteln (extrem wichtig für die UX!)
// Wenn die Zeile markiert ist (Selected), muss der Text meist weiß sein,
// ansonsten schwarz (oder je nach System-Theme).
  QPalette::ColorRole textRole = (option.state & QStyle::State_Selected)
                               ? QPalette::HighlightedText
                               : QPalette::Text;

// 4. Den Text nativ durch den Style zeichnen lassen
  QApplication::style()->drawItemText(
    painter,
    textRect,
    Qt::AlignLeft | Qt::AlignVCenter,     // Ausrichtung innerhalb von textRect
    option.palette,                       // Farbpalette der View übernehmen
    option.state & QStyle::State_Enabled, // Prüfen, ob die Zelle klickbar/aktiv ist
    text,                                 // Der zu zeichnende String
    textRole                              // Die ermittelte Farb-Rolle
  );
 
}

QRect BCValueDelegate::adjustEditorRect( const QRect& rect, int x1, int y1, int x2, int y2 ) const
{
  return rect.adjusted
    (
      rect.width() - cTextBlockOffset + x1, // Von rechts: cTextBlockOffset (==130) px (Breite der Progress Bar)
      y1,                                   // Oben: kein Offset
      x2,                                   // Rechts: 8px Padding
      y2                                    // Unten: kein Offset
    );
}

// option.rect.adjusted(option.rect.width() - cTextBlockOffset,4,0,0);

/**
 * @brief Zeichnet der 'Sliderindicator', also den Anteil des Gesamtwerts als Fortschrittsbalken
 */

void BCValueDelegate::paintPlainSliderIndicator(QPainter* painter, const QRect& rect, double ratio )const
{
  QRect sliderRect =  adjustEditorRect( rect, 0, 0, -35, 0 );
  // Kleinen Slider-Indikator zeichnen
  painter->save();
  painter->setRenderHint(QPainter::Antialiasing);

  QRect barRect = sliderRect;

  int yOffset =  sliderRect.height()/2;
  barRect.setY( rect.y() + yOffset - 3 );
  barRect.setHeight( 6);

  // Mini Progress Bar: der Gesamtbereich
  painter->setPen(Qt::NoPen);
  painter->setBrush(QColor(0xE0E0E0));
  painter->drawRoundedRect(barRect, 4, 4);

  // Mini Progress Bar: der Wertebereich
  barRect.setWidth( ratio * barRect.width() );
  painter->setBrush(QColor(0x0078D4));
  painter->drawRoundedRect(barRect, 4, 4);

  painter->restore();
}

void BCValueDelegate::paintHighlightRow(QPainter* painter, const QStyleOptionViewItem& option, int row) const
{
  painter->save();
  painter->setRenderHint(QPainter::Antialiasing);
  qreal opacity =_rowOpacities.value(row);
  painter->setOpacity(opacity);
  // Margin von 2px
  const int m = 3;
  QRect itemRect = option.rect.adjusted(m,m,-m,-m);

  // Border (2px solid #2196F3)
  // oranger rahmen
  QPen borderPen( QColor(0xFF8C00), 1);
  painter->setPen(borderPen);
  painter->setBrush(Qt::NoBrush);

  // highlight background
  //QColor highlightColor = option.palette.highlight().color();
  //highlightColor.setAlphaF(0.3); // 0.0 bis 1.0 (float ist oft lesbarer)
  //painter->fillRect(option.rect, highlightColor);

  painter->drawRoundedRect(itemRect, 2, 2);

  painter->restore();

}


void BCValueDelegate::paintPlainToggleSwitch(QPainter* painter, const QStyleOptionViewItem& option, const BCValue& bcValue) const
{
  BCToggleSwitch::paintToggleIndicator(painter, option.rect, bcValue.isChecked(), 20, option.widget->palette());
}


/**
 * @brief Startet die Animation für die übergebene Zeile
 * @param row
 */

void BCValueDelegate::onHighlightRow(int row)
{
  // Alte Animation für diese Zeile stoppen falls vorhanden
  if (_rowAnimations.contains(row))
  {
    _rowAnimations[row]->stop();
    _rowAnimations[row]->deleteLater();
  }

  // QVariantAnimation ist flexibler als QPropertyAnimation
  auto* anim = new QVariantAnimation(this);
  anim->setDuration(800);
  anim->setStartValue(0.0);
  anim->setEndValue(1.0);

  // Custom Easing für Fade-in/out Effekt
  anim->setEasingCurve(QEasingCurve::OutQuad);

  connect(anim, &QVariantAnimation::valueChanged, this, [this, row](const QVariant& value)
  {
    qreal progress = value.toReal();
    qreal opacity;

    // Schnelles Fade-in (20%), langsames Fade-out (80%)
    if (progress < 0.2) {
      opacity = progress * 5.0; // 0->1 in 20%
    }
    else
    {
      opacity = 1.0 - ((progress - 0.2) / 0.8); // 1->0 in 80%
    }

   _rowOpacities[row] = opacity;
    updateRow(row);
  });

  connect(anim, &QVariantAnimation::finished, this, [this, row, anim]()
  {
    _rowOpacities.remove(row);
    _rowAnimations.remove(row);
    updateRow(row);
    anim->deleteLater();
  });

  _rowAnimations[row] = anim;
  anim->start(QAbstractAnimation::DeleteWhenStopped);
}


/**
 * @brief Stopt alle gerade laufenden Animationen
 */

void BCValueDelegate::clearAllHighlights()
{
  for(auto* anim : std::as_const(_rowAnimations))
  {
    anim->stop();
    anim->deleteLater();
  }
  _rowAnimations.clear();
  _rowOpacities.clear();

  if (_view)
    _view->viewport()->update();

}


/**
 * @brief Zeichnet die übegebene Zeile neu.
 * @param row
 */

void BCValueDelegate::updateRow(int row)
{
  if (_view && _view->model() && row >= 0)
  {
    QModelIndex idx = _view->model()->index(row,1);
    QRect rect = _view->visualRect(idx);
    if (!rect.isEmpty())
      _view->viewport()->update(rect);
  }
}