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

 BionxControl
 Copyright © 2025 christoph holzheuer
 christoph.holzheuer@gmail.com

 Using:

 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

 mhs_can_drv.c 3.00
 © 2011 - 2015 by MHS-Elektronik GmbH & Co. KG, Germany
 Demlehner Klaus, info@mhs-elektronik.de
 @see www.mhs-elektronik.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 <QFile>
#include <QFileDialog>
#include <QTableView>

#include <QVBoxLayout>
#include <QPushButton>
#include <QMessageBox>
#include <QHeaderView>
#include <QStatusBar>
#include <bcvaluemanager.h>


using namespace Qt::StringLiterals;


BCValueManager::BCValueManager()
{

}

BCValueManager::~BCValueManager()
{
  // nothing to do here for now,
  // our models are autokilled.
}

std::optional<BCValueModel*> BCValueManager::getModel(const QString& key )
{
  if( _valueModels.contains( key) )
    return _valueModels[key];
  return std::nullopt;
}

void BCValueManager::loadXml()
{
  auto printAttrs = [](const QXmlStreamReader& xml)
  {
    QStringList parts;
    for (const auto &attr : xml.attributes()) {
      parts << attr.name().toString() + "=\"" + attr.value().toString() + "\"";
    }
    qDebug().noquote() << parts.join(" ");
  };
  /*
  QString fileName = QFileDialog::getOpenFileName(this, "XML öffnen", "", "XML Files (*.xml)");
  if (fileName.isEmpty())
    return;
  */

  QFile file(":/bikeinfo.xml");
  if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
  {
    // __fix throw
    QMessageBox::warning(nullptr, "Fehler", "Datei konnte nicht geöffnet werden.");
    return;
  }

  _xml.setDevice(&file);

  if (_xml.readNextStartElement())
  {
    if (_xml.name() != "Bike"_L1 )
      // fix throw
      _xml.raiseError(QObject::tr("The file is not an 'Bike' file."));
  }
  // ??
  Q_ASSERT(_xml.isStartElement() && _xml.name() == "Bike"_L1);

  while (!_xml.atEnd() && !_xml.hasError())
  {
    QXmlStreamReader::TokenType token = _xml.readNext();
    if (token == QXmlStreamReader::StartElement)
    {
      QString deviceType = _xml.attributes().value("Type"_L1).toString();
      qDebug() << " --- Device: " << _xml.name() << ": " << deviceType;
      printAttrs (_xml);
      const char* deviceKey = _xml.attributes().value("Type"_L1).toLatin1().constData();
      auto deviceID = _bcDeviceEnum.keyToValue64(deviceKey);
      //_currentDeviceID = BCDevice::ID( deviceID.value_or( BCDevice::ID::Invalid ) );
      _currentDeviceID = deviceID.has_value() ? BCDevice::ID( deviceID.value() ) : BCDevice::ID::Invalid;
      if(deviceID.has_value())
      {
        BCValueList parsedValues;
        readDevice( parsedValues );
        if( parsedValues.count() )
        {
          BCValueModel* valueModel = new BCValueModel( this );
          valueModel->setValueList(parsedValues);
          _valueModels.insert( deviceType, valueModel );
        }
      }

    }
  }

  /*
  if (xml.hasError())
  {
    QMessageBox::critical(nullptr, "Parsing Fehler", xml.errorString());
  }
  else
  {
    m_model->setDevices(parsedValues);
  }
  */

  // create & add new model to the model map

}

void BCValueManager::readDevice( BCValueList& parsedValues )
{
  auto printAttrs = [](const QXmlStreamReader& xml)
  {
    QStringList parts;
    for (const auto &attr : xml.attributes()) {
      parts << attr.name().toString() + "=\"" + attr.value().toString() + "\"";
    }
    qDebug().noquote() << parts.join(" ");
  };

  printAttrs (_xml);
  Q_ASSERT(_xml.isStartElement() && _xml.name() == "Device"_L1);
  qDebug() << " ---------------";


  //while (!_xml.atEnd() && !_xml.hasError())
  while( _xml.readNextStartElement() )
  {
    if( _xml.attributes().hasAttribute(BCTags::ID) )
    {
      //qDebug() << " --- found: " << _xml.name() << " : " << _xml.attributes().value(BCTags::ID);

      QString id = _xml.attributes().value(BCTags::ID).toString();
      BCValueParams params
      {
        .ID       = id,
        .Label    = _xml.attributes().value(BCTags::Label).toString(),
        .Default  = _xml.attributes().value(BCTags::Default).toString(),
        .Current  = _xml.attributes().value(BCTags::Current).toString(),
        .Enabled  = _xml.attributes().value(BCTags::Enabled).toString(),
        .UnitType = _xml.attributes().value(BCTags::UnitType).toString(),
        .Min      = _xml.attributes().value(BCTags::Min).toString(),
        .Max      = _xml.attributes().value(BCTags::Max).toString(),
        .Factor   = _xml.attributes().value(BCTags::Factor).toString()
      };

      // __fix! können ungültige werte erzeugt werden ?
      //BCValue newValue = BCValue::makeValue( _currentDeviceID, params );
      //if(newValue)
      //  parsedValues.push_back( newValue );
      parsedValues.push_back( makeValue( _currentDeviceID, params ) );
    }

    //printAttrs (_xml);
   _xml.skipCurrentElement();
  }
}


       // --- NEU: Speichern mit QXmlStreamWriter ---
void BCValueManager::saveXml()
{
  /*
  QString fileName = QFileDialog::getSaveFileName(this, "XML speichern", "", "XML Files (*.xml)");
  if (fileName.isEmpty()) return;

  QFile file(fileName);
  if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
      QMessageBox::warning(this, "Fehler", "Datei konnte nicht zum Schreiben geöffnet werden.");
      return;
    }

  QXmlStreamWriter xml(&file);
  xml.setAutoFormatting(true); // Sorgt für schöne Einrückungen (Tabs/Spaces)
  xml.writeStartDocument();
  xml.writeStartElement("devices");

         // Daten vom Model holen
  const QList<Device> &devices = m_model->getDevices();

  for (const Device &d : devices) {
      xml.writeStartElement("device");
      xml.writeAttribute("name", d.name);
      xml.writeAttribute("ip", d.ip);
      xml.writeEndElement(); // </device>
    }

  xml.writeEndElement(); // </devices>
  xml.writeEndDocument();

         // Prüfen ob alles geschrieben wurde
  if (file.error() != QFile::NoError) {
      QMessageBox::critical(this, "Fehler", "Fehler beim Schreiben der Datei.");
    } else {
      statusBar()->showMessage("Datei erfolgreich gespeichert!", 3000);
    }
 */
}



BCValue BCValueManager::makeValue( BCDevice::ID deviceID, const BCValueParams& params )
{

  auto setIfExists = [&]( QStringView source, optDouble& target )
  {
    if( !source.isEmpty() )
    {
      bool ok;
      double testVal = source.toDouble(&ok);
      if (ok)
        target = testVal;
    }
  };

  static QMetaEnum s_bcValueEnum{QMetaEnum::fromType<BC::ID>()};

  /*
    Wir brauchen:
      - eine gültige ID

  */
  BCValue newValue{};

  auto IDVal = s_bcValueEnum.keyToValue64( params.ID.toLatin1().constData() );
  if( IDVal.has_value() )
  {
    newValue = BCValue( deviceID, BC::ID( IDVal.value() ) );
    /*
    setIfExists( params.Factor, newValue.factor );
    setIfExists( params.Min, newValue.min );
    setIfExists( params.Max, newValue.max );
    */
    newValue.defaultValue.setValue( params.Label );
    newValue.value.setValue(  params.Current );
    newValue.label = params.Label;
  }

  return newValue;
}