/*
    This file is part of Akonadi.

    Copyright (c) 2010 Stephen Kelly <steveire@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.

    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.
*/

// READ THE README FILE

#include "itemviewerwidget.h"

#include <QItemSelectionModel>
#include <QItemSelectionRange>
#include <QStackedWidget>
#include <QVBoxLayout>

#include <AkonadiCore/entitytreemodel.h>

#include "messageviewer/viewer.h"
#include "Akonadi/Contact/ContactViewer"
#include "noteviewer.h"

using namespace Akonadi;

ItemViewerWidget::ItemViewerWidget(QItemSelectionModel *itemSelectionModel, QWidget *parent, Qt::WindowFlags f)
    : QWidget(parent, f)
    , m_itemSelectionModel(itemSelectionModel)
    , m_widgetStack(new QStackedWidget(this))
{
    QVBoxLayout *layout = new QVBoxLayout(this);
    layout->addWidget(m_widgetStack);

    m_widgetStack->addWidget(new QWidget(this));
    m_mailViewer = new MessageViewer::Viewer(this);
    m_contactViewer = new Akonadi::ContactViewer(this);
    m_noteViewer = new NoteViewer(this);
    m_widgetStack->addWidget(m_mailViewer);
    m_widgetStack->addWidget(m_contactViewer);
    m_widgetStack->addWidget(m_noteViewer);

    connect(itemSelectionModel, SIGNAL(selectionChanged(QItemSelection,QItemSelection)), SLOT(selectionChanged(QItemSelection,QItemSelection)));
}

void ItemViewerWidget::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
{
    Q_UNUSED(deselected);
    QModelIndex selectedIndex;
    for (const QItemSelectionRange &range : selected) {
        selectedIndex = range.topLeft();
        if (range.bottom() > selectedIndex.row()) {
            return;    // Somehow more than one selected row in the list.
        }
    }

    if (!selectedIndex.isValid()) {
        return;    // No meaningful selection.
    }

    QString mimeType = selectedIndex.data(EntityTreeModel::MimeTypeRole).toString();
    Akonadi::Item item = selectedIndex.data(EntityTreeModel::ItemRole).value<Akonadi::Item>();
    if (mimeType == QLatin1String("message/rfc822")) {
        m_widgetStack->setCurrentIndex(1);
        m_mailViewer->setMessageItem(item, MimeTreeParser::Force);
        return;
    }
    if (mimeType == QLatin1String("text/directory")) {
        m_widgetStack->setCurrentIndex(2);
        m_contactViewer->setItem(item);
        return;
    }
    if (mimeType == QLatin1String("text/x-vnd.akonadi.note")) {
        m_widgetStack->setCurrentIndex(3);
        m_noteViewer->setIndex(selectedIndex);
        return;
    }

    m_widgetStack->setCurrentIndex(0);
}
