/*
    This file is part of Akonadi.

    Copyright (c) 2012 Volker Krause <vkrause@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.

    This program 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 General Public License for more details.

    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 "instanceselector.h"
#include "ui_instanceselector.h"

#include <KDebug>
#include <KLocale>

#include <akonadi/private/protocol_p.h>

#include <QApplication>
#include <QDBusConnection>
#include <QDBusConnectionInterface>
#include <QStandardItemModel>

InstanceSelector::InstanceSelector( const QString& remoteHost, QWidget* parent, Qt::WindowFlags flags )
  : KDialog( parent, flags ),
    ui( new Ui::InstanceSelector ),
    m_remoteHost( remoteHost ),
    mWindow( 0 )
{
  ui->setupUi(mainWidget());

  setButtons(Ok|Close);
  setButtonIcon(Ok, KIcon("network-connect"));
  setButtonText(Ok, i18n("Connect"));

  const QStringList insts = instances();
  kDebug() << "Found running Akonadi instances:" << insts;
  if ( insts.size() <= 1 ) {
    m_instance = QString::fromUtf8( qgetenv("AKONADI_INSTANCE") );
    if ( insts.size() == 1 && m_instance.isEmpty() )
      m_instance = insts.first();
    accept();
  } else {
    QStandardItemModel *model = new QStandardItemModel( this );
    foreach ( const QString &inst, insts ) {
      QStandardItem *item = new QStandardItem;
      item->setText( inst.isEmpty() ? i18n("<global>") : inst );
      item->setData( inst, Qt::UserRole );
      model->appendRow( item );
    }
    connect( ui->listView, SIGNAL(doubleClicked(QModelIndex)), this, SLOT(accept()) );
    ui->listView->setModel( model );
    show();
  }
}

InstanceSelector::~InstanceSelector()
{
  delete mWindow;
}

void InstanceSelector::accept()
{
  if ( ui->listView->model() ) { // there was something to select
    const QModelIndexList selection = ui->listView->selectionModel()->selectedRows();
    if ( selection.size() != 1 )
      return;
    m_instance = selection.first().data(Qt::UserRole).toString();
  }
  QDialog::accept();

  qputenv( "AKONADI_INSTANCE", m_instance.toUtf8() );
  MainWindow *mWindow = new MainWindow;
  if ( !m_remoteHost.isEmpty() )
    mWindow->setWindowTitle( i18n( "Remote Akonadi Console (%1)", m_remoteHost ) );
  else if ( !m_instance.isEmpty() )
    mWindow->setWindowTitle( i18n( "Akonadi Console (Instance: %1)", m_instance ) );
  mWindow->show();
}

void InstanceSelector::reject()
{
  QDialog::reject();
  QApplication::quit();
}

QStringList InstanceSelector::instances()
{
  const QStringList allServices = QDBusConnection::sessionBus().interface()->registeredServiceNames();
  QStringList insts;
  foreach ( const QString &service, allServices ) {
    if ( !service.startsWith( QLatin1String(AKONADI_DBUS_CONTROL_SERVICE_LOCK) ) )
      continue;
    insts.push_back(service.mid( qstrlen(AKONADI_DBUS_CONTROL_SERVICE_LOCK) + 1) );
  }
  return insts;
}