/*
  This file is part of KTnef.

  Copyright (C) 2002 Michael Goffioul <kdeprint@swing.be>
  Copyright (c) 2012 Allen Winter <winter@kde.org>

  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.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software Foundation,
  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/

#include "attachpropertydialog.h"
#include "qwmf.h"

#include <KTNEF/KTNEFAttach>
#include <KTNEF/KTNEFProperty>
#include <KTNEF/KTNEFPropertySet>
#include <KTNEF/KTNEFDefs>

#include <KApplication>
#include <KDebug>
#include <KFileDialog>
#include <KLocalizedString>
#include <KMessageBox>
#include <KMimeType>

#include <QBuffer>
#include <QDataStream>
#include <QLabel>
#include <QTreeWidget>

AttachPropertyDialog::AttachPropertyDialog( QWidget *parent )
  : KDialog( parent ),
    mAttach(0)
{
  setButtons( User1|Close );
  setDefaultButton( Close );
  setButtonText(User1, i18n("Save..."));
  setModal( true );
  QWidget *mainWidget = new QWidget( this );
  mUI.setupUi( mainWidget );
  mUI.mProperties->setHeaderHidden( true );
  setMainWidget( mainWidget );
  connect(this, SIGNAL(user1Clicked()), this, SLOT(slotSave()));
  readConfig();
}

AttachPropertyDialog::~AttachPropertyDialog()
{
  writeConfig();
}

void AttachPropertyDialog::readConfig()
{
  KConfigGroup group( KGlobal::config(), "AttachPropertyDialog" );
  const QSize size = group.readEntry( "Size", QSize(500, 400) );
  if ( size.isValid() ) {
    resize( size );
  }
}

void AttachPropertyDialog::writeConfig()
{
  KConfigGroup group( KGlobal::config(), "AttachPropertyDialog" );
  group.writeEntry( "Size", size() );
  group.sync();
}


void AttachPropertyDialog::setAttachment( KTNEFAttach *attach )
{
  QString s = attach->fileName().isEmpty() ?
                attach->name() :
                attach->fileName();
  mUI.mFilename->setText( QLatin1String("<b>") + s + QLatin1String("</b>") );
  setWindowTitle( i18nc( "@title:window", "Properties for Attachment %1", s ) );
  mUI.mDisplay->setText( attach->displayName() );
  mUI.mMime->setText( attach->mimeTag() );
  s.setNum( attach->size() );
  s.append( i18n(" bytes") );
  mUI.mSize->setText( s );
  KMimeType::Ptr mimetype = KMimeType::mimeType( attach->mimeTag() );
  QPixmap pix = loadRenderingPixmap( attach, kapp->palette().color( QPalette::Background ) );
  if ( !pix.isNull() ) {
    mUI.mIcon->setPixmap( pix );
  } else {
    mUI.mIcon->setPixmap( mimetype->iconName() );
  }
  mUI.mDescription->setText( mimetype->comment() );
  s.setNum( attach->index() );
  mUI.mIndex->setText( s );

  formatPropertySet( attach, mUI.mProperties );
  mAttach = attach;
}

void AttachPropertyDialog::slotSave()
{
  saveProperty( mUI.mProperties, mAttach, this );
  accept();
}

void AttachPropertyDialog::formatProperties( const QMap<int,KTNEFProperty*>& props, QTreeWidget *lv,
                       QTreeWidgetItem *item, const QString &prefix )
{
  for ( QMap<int,KTNEFProperty*>::ConstIterator it = props.begin(); it != props.end(); ++it ) {
    QTreeWidgetItem *newItem = 0;
    if ( lv ) {
      newItem = new QTreeWidgetItem( lv, QStringList( ( *it )->keyString() ) );
    } else if ( item ) {
      newItem = new QTreeWidgetItem( item, QStringList( ( *it )->keyString() ) );
    } else {
      kWarning() << "formatProperties() called with no listview and no item";
      return;
    }

    QVariant value = ( *it )->value();
    if ( value.type() == QVariant::List ) {
      newItem->setExpanded( true );
      newItem->setText( 0,
                        newItem->text( 0 ) +
                        QLatin1String(" [") + QString::number( value.toList().count() ) + QLatin1Char(']') );
      int i = 0;
      for ( QList<QVariant>::ConstIterator lit = value.toList().constBegin();
            lit != value.toList().constEnd(); ++lit, ++i ) {
        new QTreeWidgetItem( newItem,
                             QStringList()
                               << QLatin1Char( '[' )  + QString::number( i ) + QLatin1Char( ']' )
                               << QString( KTNEFProperty::formatValue( *lit ) ) );
      }
    } else if ( value.type() == QVariant::DateTime ) {
      newItem->setText( 1, value.toDateTime().toString() );
    } else {
      newItem->setText( 1, ( *it )->valueString() );
      newItem->setText( 2, prefix + QLatin1Char('_') + QString::number( it.key() ) );
    }
  }
}

void AttachPropertyDialog::formatPropertySet( KTNEFPropertySet *pSet, QTreeWidget *lv )
{
  formatProperties( pSet->properties(), lv, 0, QLatin1String("prop") );
  QTreeWidgetItem *item =
    new QTreeWidgetItem( lv,
                         QStringList( i18nc( "@label", "TNEF Attributes" ) ) );
  item->setExpanded( true );
  formatProperties( pSet->attributes(), 0, item, QLatin1String("attr") );
}

void AttachPropertyDialog::saveProperty( QTreeWidget *lv, KTNEFPropertySet *pSet, QWidget *parent )
{
  QList<QTreeWidgetItem *> list = lv->selectedItems();
  if ( list.isEmpty() || !list.first() ) {
    KMessageBox::error(
      parent,
      i18nc( "@info",
             "Must select an item first." ) );
    return;
  }

  QTreeWidgetItem *item = list.first();
  if ( item->text( 2 ).isEmpty() ) {
    KMessageBox::error(
      parent,
      i18nc( "@info",
             "The selected item cannot be saved because it has an empty tag." ) );
  } else {
    QString tag = item->text( 2 );
    int key = tag.mid( 5 ).toInt();
    QVariant prop = ( tag.startsWith( QLatin1String( "attr_" ) ) ?
                        pSet->attribute( key ) :
                        pSet->property( key ) );
    QString filename = KFileDialog::getSaveFileName( tag, QString(), parent );
    if ( !filename.isEmpty() ) {
      QFile f( filename );
      if ( f.open( QIODevice::WriteOnly ) ) {
        switch ( prop.type() ) {
        case QVariant::ByteArray:
          f.write( prop.toByteArray().data(), prop.toByteArray().size() );
          break;
        default:
        {
          QTextStream t( &f );
          t << prop.toString();
          break;
        }
        }
        f.close();
      } else {
        KMessageBox::error(
          parent,
          i18nc( "@info",
                 "Unable to open file for writing, check file permissions." ) );
      }
    }
  }
}

QPixmap AttachPropertyDialog::loadRenderingPixmap( KTNEFPropertySet *pSet, const QColor &bgColor )
{
  QPixmap pix;
  QVariant rendData = pSet->attribute( attATTACHRENDDATA );
  QVariant wmf = pSet->attribute( attATTACHMETAFILE );

  if ( !rendData.isNull() && !wmf.isNull() ) {
    // Get rendering size
    QByteArray qb = rendData.toByteArray();
    QBuffer rendBuffer( &qb );
    rendBuffer.open( QIODevice::ReadOnly );
    QDataStream rendStream( &rendBuffer );
    rendStream.setByteOrder( QDataStream::LittleEndian );
    quint16 type, w, h;
    rendStream >> type >> w >> w; // read type and skip 4 bytes
    rendStream >> w >> h;
    rendBuffer.close();

    if ( type == 1 && w > 0 && h > 0 ) {
      // Load WMF data
      QWinMetaFile wmfLoader;
      QByteArray qb = wmf.toByteArray();
      QBuffer wmfBuffer( &qb );
      wmfBuffer.open( QIODevice::ReadOnly );
      if ( wmfLoader.load( wmfBuffer ) ) {
        pix.scaled( w, h, Qt::KeepAspectRatio );
        pix.fill( bgColor );
        wmfLoader.paint( &pix );
      }
      wmfBuffer.close();
    }
  }
  return pix;
}