/*
 * This file is part of the Akonadi Mail example.
 *
 * Copyright 2009  Stephen Kelly <steveire@gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301  USA
 */

#include "mailmodel.h"

#include <kmime/kmime_message.h>

#include <boost/shared_ptr.hpp>

#include <KDebug>

typedef boost::shared_ptr<KMime::Message> MessagePtr;

using namespace Akonadi;

class MailModelPrivate
{
public:
  MailModelPrivate(MailModel *model)
    : q_ptr(model)
  {
    m_collectionHeaders << QLatin1String( "Folder" ) << QLatin1String( "Count" );
    m_itemHeaders << QLatin1String( "Subject" ) << QLatin1String( "From" ) << QLatin1String( "Date" );
  }
  Q_DECLARE_PUBLIC(MailModel)
  MailModel *q_ptr;

  QStringList m_itemHeaders;
  QStringList m_collectionHeaders;

};

MailModel::MailModel( ChangeRecorder *monitor, QObject *parent)
  : EntityTreeModel(monitor, parent), d_ptr(new MailModelPrivate(this))
{

}

MailModel::~MailModel()
{
   delete d_ptr;
}

QVariant MailModel::entityData(const Item &item, int column, int role) const
{
  if (!item.hasPayload<MessagePtr>())
  {
    kWarning() << "Not a message" << item.id() << item.remoteId() << item.mimeType();
    return QVariant();
  }
  const MessagePtr mail = item.payload<MessagePtr>();
  if (role == Qt::DisplayRole)
  {
    switch (column)
    {
    case 0:
      return mail->subject()->asUnicodeString();
    case 1:
      return mail->from()->asUnicodeString();
    case 2:
      return mail->date()->asUnicodeString();
    }
  } else if (role == Qt::ToolTipRole)
  {
    QString d;
    d.append(QString::fromLatin1("Subject: %1\n").arg(mail->subject()->asUnicodeString()));
    d.append(QString::fromLatin1("From: %1\n").arg(mail->from()->asUnicodeString()));
    d.append(QString::fromLatin1("Date: %1\n").arg(mail->date()->asUnicodeString()));
    return d;
  }
  return EntityTreeModel::entityData(item, column, role);
}

QVariant MailModel::entityData(const Collection &collection, int column, int role) const
{
  if (role == Qt::DisplayRole)
  {
    switch (column)
    {
    case 0:
      return EntityTreeModel::entityData(collection, column, role);
    case 1:
    {
      const QModelIndex index = EntityTreeModel::modelIndexForCollection( this, collection );
      Q_ASSERT( index.isValid() );
      return rowCount(index );
    }
    default:
      // Return a QString to pass modeltest.
      return QString();
  //     return QVariant();
    }
  }
  return EntityTreeModel::entityData(collection, column, role);
}

int MailModel::columnCount(const QModelIndex &index) const
{
  Q_UNUSED(index);
  return 3;
}

QVariant MailModel::entityHeaderData( int section, Qt::Orientation orientation, int role, HeaderGroup headerGroup ) const
{
  Q_D(const MailModel);

  if (orientation == Qt::Horizontal)
  {
    if (headerGroup == EntityTreeModel::CollectionTreeHeaders)
    {
      if (role == Qt::DisplayRole)
      {
        if (section >= d->m_collectionHeaders.size() )
          return QVariant();
        return d->m_collectionHeaders.at(section);
      }
    } else if (headerGroup == EntityTreeModel::ItemListHeaders)
    {
      if (role == Qt::DisplayRole)
      {
        if (section >= d->m_itemHeaders.size() )
          return QVariant();
        return d->m_itemHeaders.at(section);
      }
    }
  }
  return EntityTreeModel::entityHeaderData(section, orientation, role, headerGroup);
}