/*
  Copyright (C) 2010 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.net,
     Author Tobias Koenig <tokoe@kdab.com>

  This library is free software; you can redistribute it and/or modify it
  under the terms of the GNU Library General Public License as published by
  the Free Software Foundation; either version 2 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 Library General Public
  License for more details.

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

#include "sendmdnhandler.h"

#include "interfaces/mailinterfaces.h"
#include "kernel/mailkernel.h"
#include "util/mailutil.h"
#include "mdnadvicedialog.h"

#include <messagecomposer/helper/messagefactory.h>
#include <messagecomposer/sender/messagesender.h>
#include <messagecore/helpers/messagehelpers.h>
#include <messageviewer/settings/globalsettings.h>

#include <Akonadi/Collection>
#include <Akonadi/Item>
#include <Akonadi/KMime/MessageFlags>

#include <QQueue>
#include <QTimer>

using namespace MailCommon;

class SendMdnHandler::Private
{
public:
    Private( SendMdnHandler *qq, IKernel *kernel )
        : q( qq ), mKernel( kernel )
    {
    }

    void handleMessages();

    SendMdnHandler *q;
    IKernel *mKernel;
    QQueue<Akonadi::Item> mItemQueue;
    QTimer mTimer;
};

void SendMdnHandler::Private::handleMessages()
{
    while ( !mItemQueue.isEmpty() ) {
        Akonadi::Item item = mItemQueue.dequeue();

#if 0
        // should we send an MDN?
        if ( MessageViewer::GlobalSettings::notSendWhenEncrypted() &&
             message()->encryptionState() != KMMsgNotEncrypted &&
             message()->encryptionState() != KMMsgEncryptionStateUnknown ) {
            return;
        }
#else
        kDebug() << "AKONADI PORT: Disabled code in  " << Q_FUNC_INFO;
#endif

        const Akonadi::Collection collection = item.parentCollection();
        if ( collection.isValid() &&
             ( CommonKernel->folderIsSentMailFolder( collection ) ||
               CommonKernel->folderIsTrash( collection ) ||
               CommonKernel->folderIsDraftOrOutbox( collection ) ||
               CommonKernel->folderIsTemplates( collection ) ) ) {
            continue;
        }

        const KMime::Message::Ptr message = MessageCore::Util::message( item );
        if ( !message ) {
            continue;
        }

        const QPair<bool, KMime::MDN::SendingMode> mdnSend =
                MDNAdviceHelper::instance()->checkAndSetMDNInfo( item, KMime::MDN::Displayed );
        if ( mdnSend.first ) {
            const int quote =  MessageViewer::GlobalSettings::self()->quoteMessage();

            MessageComposer::MessageFactory factory( message, Akonadi::Item().id() );
            factory.setIdentityManager( mKernel->identityManager() );
            factory.setFolderIdentity( MailCommon::Util::folderIdentity( item ) );

            const KMime::Message::Ptr mdn =
                    factory.createMDN( KMime::MDN::ManualAction, KMime::MDN::Displayed, mdnSend.second, quote );
            if ( mdn ) {
                if ( !mKernel->msgSender()->send( mdn ) ) {
                    kDebug() << "Sending failed.";
                }
            }
        }
    }
}

SendMdnHandler::SendMdnHandler( IKernel *kernel, QObject *parent )
    : QObject( parent ), d( new Private( this, kernel ) )
{
    d->mTimer.setSingleShot( true );
    connect( &d->mTimer, SIGNAL(timeout()), this, SLOT(handleMessages()) );
}

SendMdnHandler::~SendMdnHandler()
{
    delete d;
}

void SendMdnHandler::setItem( const Akonadi::Item &item )
{
    if ( item.hasFlag( Akonadi::MessageFlags::Seen ) ) {
        return;
    }

    d->mTimer.stop();

    d->mItemQueue.enqueue( item );

    if ( MessageViewer::GlobalSettings::self()->delayedMarkAsRead() &&
         MessageViewer::GlobalSettings::self()->delayedMarkTime() != 0 ) {
        d->mTimer.start( MessageViewer::GlobalSettings::self()->delayedMarkTime() * 1000 );
        return;
    }

    d->handleMessages();
}

#include "moc_sendmdnhandler.cpp"