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

    source::worx xtree
    Copyright © 2024-2025 c.holzheuer
    christoph.holzheuer@gmail.com

    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 2 of the License, or
    (at your option) any later version.

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

#include <xqitem.h>

#include <xqviewmodel.h>
#include <xqmaptor.h>
#include <QDateTime>
#include <xqitemtype.h>

#include <QDebug>


XQItem::XQItemFlagMap XQItem::s_ItemFlagMap
{
  { "NoItemFlags",           Qt::NoItemFlags },
  { "IsSelectable",          Qt::ItemIsSelectable },
  { "IsEditable",            Qt::ItemIsEditable },
  { "IsDragEnabled",         Qt::ItemIsDragEnabled },
  { "IsDropEnabled",         Qt::ItemIsDropEnabled },
  { "IsUserCheckable",       Qt::ItemIsUserCheckable },
  { "IsEnabled",             Qt::ItemIsEnabled },
  { "IsAutoTristate",        Qt::ItemIsAutoTristate },
  { "ItemNeverHasChildren",  Qt::ItemNeverHasChildren },
  { "IsUserTristate",        Qt::ItemIsUserTristate }
};

XQItem::XQItemDataRoleMap XQItem::s_ItemDataRoleMap
{
  {"ItemType", ItemTypeRole},
  {"Content",  ContentRole},
  {"RenderStyle", RenderStyleRole},
  {"EditorType", EditorTypeRole},
  {"ItemFlags", FlagsRole},
  {"UnitType", UnitTypeRole},
  {"ContentFormat", ContentFormatRole},
  {"FlagsRole", FlagsRole},
  {"Icon", IconRole},
  {"FixedChoices", FixedChoicesRole},
  {"DataNode", ContentNodeRole},
  {"SheetNode", SheetNodeRole}
};

// No bi-map needed here, qmap.key() is sufficient for the job
XQItem::XQRenderStyleMap XQItem::s_RenderStyleMap
{
  { "NoRenderStyle",     NoRenderStyle },
  { "HiddenStyle",       HiddenStyle },
  { "HeaderStyle",       HeaderStyle },
  { "PlainStyle",        PlainStyle },
  { "CheckBoxStyle",     CheckBoxStyle },
  { "ComboBoxStyle",     ComboBoxStyle },
  { "TreeHeaderStyle",   TreeHeaderStyle },
  { "CustomRenderStyle", CustomRenderStyle },
  { "PickerStyle",       PickerStyle },
  { "SpinBoxStyle",      SpinBoxStyle },
  { "ProgressBarStyle",  ProgressBarStyle},
  { "FormattedStyle",    FormattedStyle},
};

XQItem::XQEditorTypeMap XQItem::s_EditorTypeMap
{
  { "NoEditorType",     NoEditorType },
  { "LineEditType",     LineEditType },
  { "ComboBoxType",     ComboBoxType },
  { "PickerType",       PickerType },
  { "ProgressBarType",  ProgressBarType },
  { "SpinBoxType",      SpinBoxType},
  { "CustomEditorType", CustomEditorType}
};

XQItem::XQUnitTypeMap XQItem::s_UnitTypeMap
{
  { NoUnitType, "NoUnitType" },
  { Ampere,     "A" },
  { Volt,       "V" },
  { Ohm,        "Ohm" },
  { Farad,      "C" },
  { Watt,       "W" },
  { WattPeak,   "Wp" },
  { WattHour,   "Wh" },
  { Second,     "s" },
  { Percent,    "%" },
  { Hertz,      "Hz" },
  { Meter,      "m" },
  { Kg,         "kg" },
  { ISODate,    "ISODate" }, // fixme: ISO-Date is present, but has no Unit ?!?
};

XQItem::XQPrefixExponentMap XQItem::s_PrefixExponentMap
{
  { "p", -12 }, // pico
  { "n", -9 }, // nano
  { "µ", -6 }, // micro
  { "m", -3 }, // Milli
  { "" , 0 },  // No prefix means multiplier of 1
  //{ " ", 0 },  // No prefix means multiplier of 1
  { "k", 3 },  // Kilo
  { "M", 6 },  // Mega
  { "G", 9 },  // Giga
  { "T", 12 }, // Tera
  { "P", 15 }, // Peta
  { "E", 18 }, // Exa
  { "Z", 21 }, // Zetta
  { "Y", 24}, // Yotta
};



XQItem::XQItem()
  : XQItem{XQItemType::staticItemType()}
{

}

XQItem::XQItem( XQItemType* itemType )
    : QStandardItem{}
{
  setItemType( itemType );
}


XQItem::XQItem(XQItemType* itemType, const QString *content )
  : XQItem{ itemType }
{
  setContent(content);
}

// Warum beides?
XQItem::XQItem(XQItemType* itemType, const QString *content, const XQNodePtr& contentNode )
  : XQItem{ itemType, content }
{
  setContentNode(contentNode);
}


/*
XQItem::XQItem(const XQItem& other)
    : QStandardItem( other )
{
  // QStandardItem( other ) koopiert bereits
  // die data() struktur 
}

XQItem& XQItem::operator=(const XQItem& other)
{
  if( this != &other)
  {
    // kopiert data()
    this->QStandardItem::operator=( other );
  }
  return *this;
}
*/

//! firz

XQItem::~XQItem()
{

}


//! firz

XQItem* XQItem::clone() const
{
  //return new XQItem( *this );
  // this is used as invisible filling material
  //return new XQItem( "", XQItemType::StaticStyle );
  // __fix!
  return new XQItem();
}


//! false für ein ungültiges item. 'ungültig' heisst hier, dass nur ein
//! mockup-itemtype gesetzt ist.

bool XQItem::isValid() const
{
  XQItemType* dummyType = XQItemType::staticItemType();
  return QStandardItem::data( XQItem::ItemTypeRole ).value<XQItemType*>() != dummyType;
}


//! firz

XQNodePtr XQItem::contentNode() const
{
  return data( ContentNodeRole ).value<XQNodePtr>();
}


//! firz

void XQItem::setContentNode( const XQNodePtr& contentNode )
{
  QStandardItem::setData( QVariant::fromValue(contentNode), ContentNodeRole);
}


//! firz

XQNodePtr XQItem::sheetNode() const
{
  //
  return data( SheetNodeRole ).value<XQNodePtr>();
}

//! firz

void XQItem::setSheetNode(const XQNodePtr& sheetNode )
{
  QStandardItem::setData( QVariant::fromValue(sheetNode), SheetNodeRole);
}


//! firz

bool XQItem::hasAttribute( const QString& attribKey ) const
{
  return contentNode()->has_attribute( attribKey );
}


//! firz

const QString& XQItem::attribute( const QString& attribKey, const QString& defaultValue ) const
{
  if( !hasAttribute(attribKey ) )
    return defaultValue;
  return contentNode()->attribute( attribKey );
}


//! firz

bool XQItem::testAttribute( const QString& attribKey, const QString& attribValue ) const
{
  return contentNode()->test_attribute( attribKey, attribValue );
}


//! firz

XQItemType& XQItem::itemType() const
{
  XQItemType* itemTypePtr = QStandardItem::data( XQItem::ItemTypeRole ).value<XQItemType*>();
  return *itemTypePtr;
}

//! firz

void XQItem::setItemType( XQItemType* itemTypePtr )
{
  // der ItemType wird direkt hier gespeichert
  QStandardItem::setData( QVariant::fromValue(itemTypePtr), XQItem::ItemTypeRole );
}


//! firz

void XQItem::addFlag( Qt::ItemFlag newFlag )
{
  setFlags( flags() | newFlag );
}


//! firz

void XQItem::clearFlag( Qt::ItemFlag newFlag )
{
  setFlags( flags() & ~newFlag);
}

///
/// data() access shortcuts
///

//! firz

XQItem::RenderStyle XQItem::renderStyle() const
{
  return data( RenderStyleRole ).value<RenderStyle>();
}


//! firz

QString XQItem::renderStyleToString() const
{
  return XQItem::fetchRenderStyleToString( renderStyle() );
}

//! firz

void XQItem::setRenderStyle(RenderStyle renderStyle )
{
  setData( QVariant::fromValue(renderStyle), XQItem::RenderStyleRole );
  // Der RenderStyle wohnt im ItemType
  //itemType().replaceAttribute( this, RenderStyleRole, renderStyle );
}


XQItem::EditorType XQItem::editorType() const
{
  return data( EditorTypeRole ).value<EditorType>();
}


//! firz

QString XQItem::editorTypeToString() const
{
  return XQItem::fetchEditorTypeToString( editorType() );
}

//! firz

void XQItem::setEditorType(EditorType editorType)
{
  setData( QVariant::fromValue(editorType), XQItem::EditorTypeRole);
  // Der EditorType wohnt im ItemType
  //itemType().replaceAttribute( this, EditorTypeRole, editorType );
}


//! firz

XQItem::UnitType XQItem::unitType() const
{
  return data( XQItem::UnitTypeRole ).value<UnitType>();
}


//! firz

QString XQItem::unitTypeToString() const
{
  return XQItem::fetchUnitTypeToString( unitType() );
}


//! firz

void XQItem::setUnitType(UnitType unitType)
{
  setData( QVariant::fromValue(unitType), XQItem::UnitTypeRole);
}


//! firz

const QString& XQItem::content() const
{
  const QString* contentPtr = QStandardItem::data( XQItem::ContentRole ).value<const QString*>();
  if(contentPtr)
    return *contentPtr;

  static const QString s_dummyContent("-");

  return s_dummyContent;
}


//! firz

void XQItem::setContent( const QString* content )
{
  setData( QVariant::fromValue<const QString*>(content), XQItem::ContentRole );
}


//! firz

const QString& XQItem::contentKey() const
{
  return contentNode()->attributes().key_of( content() );
}

//! gibt den content-format string zurück

QString XQItem::contentFormat() const
{
  return data( XQItem::ContentFormatRole ).toString();
}


void XQItem::setContentFormat(const QString& contentFormat)
{
  setData( QVariant::fromValue(contentFormat), XQItem::ContentFormatRole);
}


//! gibt das read-only auswahl-model zurück (wenn dieses item als
//! combobox gerendert wird)

QStandardItemModel* XQItem::fixedChoices() const
{
  return data( XQItem::FixedChoicesRole ).value<QStandardItemModel*>();
}


//! erzeugt einen string aus den werten des read-only auswahl-models

QString XQItem::fixedChoicesToString() const
{
  QStandardItemModel* model = fixedChoices();
  if( !model || model->rowCount() == 0)
    return QString("()");

  QString result = "(";

  int rc = model->rowCount();
  for (int row = 0; row < rc; ++row)
  {
    const QString text = model->item(row)->text();
    result += text;
    if(row < rc-1)
      result += "|";
  }
  result += ")";

  return result;
}

//! setzt das auswahl-model für read-only comboboxes

void XQItem::setfixedChoices( QStandardItemModel* newModel )
{  
  setData( QVariant::fromValue(newModel), XQItem::FixedChoicesRole);
}

//! true, wenn 'ich' ein header item bin

bool XQItem::isHeaderStyle()
{
  return renderStyle() == XQItem::HeaderStyle;
}


//! gibt den namen der datarole zurück

QString XQItem::dataRoleName(int role)
{
  if( role < XQItem::NoRole && model() )
    return model()->roleNames()[role];
  return XQItem::fetchItemDataRoleName(role);
}

//! angespasste variante von qstandarditem::setData. geteilte attribute
//! werden vom xqitemtype geholt

QVariant XQItem::data(int role ) const
{
  //emitDataChanged()
  switch(role)
  {

    //
    // Die im ItemType ausgelagerten Daten werden
    // von da geholt.
    //

    case FlagsRole: // aka Qt::ItemDataRole(Qt::UserRole - 1),
    case IconRole:  // aka Qt::DecorationRole,
    case RenderStyleRole:
    case EditorTypeRole:
    case UnitTypeRole:
    case ContentFormatRole:
    case FixedChoicesRole:
    {
      return itemType().data(role);
    }

    // Das ist der Sonderfall, hier dereferenzieren wir den
    // Zeiger auf den QString* aus unserem XQNodePtr

    case Qt::DisplayRole :
    case Qt::EditRole :   
    case XQItem::ContentRole:
    {
      return content();
    }

    case Qt::ToolTipRole:
    {
      return content() + ":" + itemType().text() + ":" + renderStyleToString();
    }

    //
    // Die lokal verwalteten Resourcen werden über QStandardItem::data(role)
    // abgewickelt.
    //

    case ContentNodeRole:
    {
        // Das Node-Besitzer-Item wohnt in der ersten Spalte,
        // wenn wir also der  Node-Besitzer item sind ...
        if( column() == 0)
            return QStandardItem::data( XQItem::ContentNodeRole );

        // sonst: delegieren an den node-Besitzer
        QModelIndex pIndex = model()->index( row(), 0  );
        XQItem& firstItem =  xqItemFromIndex( pIndex );

        return firstItem.data( XQItem::ContentNodeRole );
    }

    case Qt::StatusTipRole:
    case Qt::WhatsThisRole:
    case Qt::SizeHintRole:


    case Qt::FontRole:
    case Qt::TextAlignmentRole:
    case Qt::BackgroundRole:
    case Qt::ForegroundRole:
    case Qt::CheckStateRole:
    case Qt::InitialSortOrderRole:

    default:
      break;

  }

  return QStandardItem::data(role);

}


void XQItem::setData(const QVariant& value, int role )
{
  //replaceAttribute( XQItem* item, XQItem::ItemDataRole role, const QVariant& newValue)

  //emitDataChanged()
  switch(role)
  {
    // das ist ein pointer auf den  original-string aus dem XML
    // ContentRole :
    // ItemTypeRole :
    case RenderStyleRole :
    case EditorTypeRole :
    case UnitTypeRole:
    case ContentFormatRole:
    case FlagsRole:
    case IconRole:
    case FixedChoicesRole:
      //qDebug() << " ---call type set Data: " << role << ": " << XQItem::fetchItemDataRoleName(role) << ":" << value.toString();
      itemType().replaceAttribute( this, value, role );
      break;

    case ContentNodeRole:
    case SheetNodeRole:

    case TypeKeyRole:
    case Qt::DisplayRole :
    case Qt::EditRole :
    // return the raw, unformatted data
    case ContentRole:

    default:
      QStandardItem::setData( value,role);

  }
}


XQItem& XQItem::fallBackDummyItem()
{
  static XQItem s_fallBackDummyItem;
  return s_fallBackDummyItem;
}

XQItem& XQItem::xqItemFromIndex(const QModelIndex& index)
{
  if (index.isValid())
  {
    const XQViewModel* mdl = dynamic_cast<const XQViewModel*>(index.model());
    if (mdl)
      return mdl->xqItemFromIndex(index);
  }

  return fallBackDummyItem();
}

int XQItem::fetchItemDataRole( const QString& dataRoleKey )
{
  if(!dataRoleKey.isEmpty() && s_ItemDataRoleMap.contains(dataRoleKey) )
    return s_ItemDataRoleMap[ dataRoleKey ];

  return NoRole;
}


QString XQItem::fetchItemDataRoleName( int dataRole )
{
  return s_ItemDataRoleMap.key(dataRole);
}


Qt::ItemFlag XQItem::fetchItemFlag( const QString& flagKey )
{
  if(!flagKey.isEmpty() && s_ItemFlagMap.contains(flagKey) )
    return Qt::ItemFlag( s_ItemFlagMap[ flagKey ] );
  return Qt::NoItemFlags;
}


QString XQItem::fetchItemFlagName( int flag )
{
  return s_ItemFlagMap.key(flag);
}


XQItem::RenderStyle XQItem::fetchRenderStyle(const QString& styleKey )
{
  if(!styleKey.isEmpty() && s_RenderStyleMap.contains(styleKey) )
    return s_RenderStyleMap[styleKey];
  return NoRenderStyle;
}


QString XQItem::fetchRenderStyleToString(XQItem::RenderStyle renderStyle )
{
  return s_RenderStyleMap.key(renderStyle);
}


XQItem::EditorType XQItem::fetchEditorType( const QString& editorTypeKey )
{
  if(!editorTypeKey.isEmpty() && s_EditorTypeMap.contains(editorTypeKey) )
    return s_EditorTypeMap[editorTypeKey];
  return NoEditorType;
}


QString XQItem::fetchEditorTypeToString( EditorType editorType )
{
  return s_EditorTypeMap.key(editorType);
}


XQItem::UnitType XQItem::fetchUnitType(const QString& unitTypeKey)
{
  return s_UnitTypeMap.key(unitTypeKey);
}


QString XQItem::fetchUnitTypeToString( UnitType unitType)
{
  return s_UnitTypeMap[unitType];
}