/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qdeclarativenearfield_p.h"
#include "qdeclarativendeffilter_p.h"
#include "qdeclarativendeftextrecord_p.h"
#include "qdeclarativendefurirecord_p.h"
#include "qdeclarativendefmimerecord_p.h"

#include <qndefmessage.h>
#include <qndefnfctextrecord.h>
#include <qndefnfcurirecord.h>

/*!
    \qmlclass NearField QDeclarativeNearField
    \brief The NearField element provides access to NDEF messages stored on NFC Forum tags.

    \ingroup connectivity-qml
    \inmodule QtConnectivity
    \since Mobility 1.2

    \sa NdefFilter
    \sa NdefRecord

    \sa QNearFieldManager
    \sa QNdefMessage
    \sa QNdefRecord

    The NearField element is part of the \bold {QtMobility.connectivity 1.2} module.

    The NearField element can be used to read NDEF messages from NFC Forum tags.  Set the \l filter
    and \l orderMatch properties to match the required NDEF messages.  Once an NDEF message is
    successfully read from a tag the \l messageRecords property is updated.

    \code
        NearField {
            filter: [ NdefFilter { type: "urn:nfc:wkt:U"; minimum: 1; maximum: 1 } ]
            orderMatch: false

            onMessageRecordsChanged: displayMessage()
        }
    \endcode
*/

/*!
    \qmlproperty list<NdefRecord> NearField::messageRecords
    \since Mobility 1.2

    This property contains the list of NDEF records in the last NDEF message read.
*/

/*!
    \qmlproperty list<NdefFilter> NearField::filter
    \since Mobility 1.2

    This property holds the NDEF filter constraints.  The \l messageRecords property will only be
    set to NDEF messages which match the filter.
*/

/*!
    \qmlproperty bool NearField::orderMatch
    \since Mobility 1.2

    This property indicates whether the order of records should be taken into account when matching
    messages.
*/

QDeclarativeNearField::QDeclarativeNearField(QObject *parent)
:   QObject(parent), m_orderMatch(false), m_componentCompleted(false), m_messageUpdating(false),
    m_manager(0), m_messageHandlerId(-1)
{
}

QDeclarativeListProperty<QDeclarativeNdefRecord> QDeclarativeNearField::messageRecords()
{
    return QDeclarativeListProperty<QDeclarativeNdefRecord>(this, 0,
                                                            &QDeclarativeNearField::append_messageRecord,
                                                            &QDeclarativeNearField::count_messageRecords,
                                                            &QDeclarativeNearField::at_messageRecord,
                                                            &QDeclarativeNearField::clear_messageRecords);

}

QDeclarativeListProperty<QDeclarativeNdefFilter> QDeclarativeNearField::filter()
{
    return QDeclarativeListProperty<QDeclarativeNdefFilter>(this, 0,
                                                            &QDeclarativeNearField::append_filter,
                                                            &QDeclarativeNearField::count_filters,
                                                            &QDeclarativeNearField::at_filter,
                                                            &QDeclarativeNearField::clear_filter);
}

bool QDeclarativeNearField::orderMatch() const
{
    return m_orderMatch;
}

void QDeclarativeNearField::setOrderMatch(bool on)
{
    if (m_orderMatch == on)
        return;

    m_orderMatch = on;
    emit orderMatchChanged();
}

void QDeclarativeNearField::componentComplete()
{
    m_componentCompleted = true;

    if (!m_filter.isEmpty())
        registerMessageHandler();
}

void QDeclarativeNearField::registerMessageHandler()
{
    if (!m_manager)
        m_manager = new QNearFieldManager(this);

    if (m_messageHandlerId != -1)
        m_manager->unregisterNdefMessageHandler(m_messageHandlerId);

    // no filter abort
    if (m_filter.isEmpty())
        return;

    QNdefFilter filter;
    filter.setOrderMatch(m_orderMatch);
    foreach (QDeclarativeNdefFilter *f, m_filter) {
        const QString type = f->type();
        uint min = f->minimum() < 0 ? UINT_MAX : f->minimum();
        uint max = f->maximum() < 0 ? UINT_MAX : f->maximum();

        if (type.startsWith(QLatin1String("urn:nfc:wkt:")))
            filter.appendRecord(QNdefRecord::NfcRtd, type.mid(12).toUtf8(), min, max);
        else if (type.startsWith(QLatin1String("urn:nfc:ext:")))
            filter.appendRecord(QNdefRecord::ExternalRtd, type.mid(12).toUtf8(), min, max);
        else if (type.startsWith(QLatin1String("urn:nfc:mime")))
            filter.appendRecord(QNdefRecord::Mime, type.mid(13).toUtf8(), min, max);
        else
            qWarning("Unknown NDEF record type %s", qPrintable(type));
    }

    m_messageHandlerId = m_manager->registerNdefMessageHandler(filter, this, SLOT(_q_handleNdefMessage(QNdefMessage)));
}

void QDeclarativeNearField::_q_handleNdefMessage(const QNdefMessage &message)
{
    m_messageUpdating = true;

    QDeclarativeListReference listRef(this, "messageRecords");

    listRef.clear();

    foreach (const QNdefRecord &record, message)
        listRef.append(qNewDeclarativeNdefRecordForNdefRecord(record));

    m_messageUpdating = false;

    emit messageRecordsChanged();
}

void QDeclarativeNearField::append_messageRecord(QDeclarativeListProperty<QDeclarativeNdefRecord> *list,
                                           QDeclarativeNdefRecord *record)
{
    QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object);
    if (!nearField)
        return;

    record->setParent(nearField);
    nearField->m_message.append(record);
    if (!nearField->m_messageUpdating)
        emit nearField->messageRecordsChanged();
}

int QDeclarativeNearField::count_messageRecords(QDeclarativeListProperty<QDeclarativeNdefRecord> *list)
{
    QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object);
    if (!nearField)
        return 0;

    return nearField->m_message.count();
}

QDeclarativeNdefRecord *QDeclarativeNearField::at_messageRecord(QDeclarativeListProperty<QDeclarativeNdefRecord> *list,
                                   int index)
{
    QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object);
    if (!nearField)
        return 0;

    return nearField->m_message.at(index);
}

void QDeclarativeNearField::clear_messageRecords(QDeclarativeListProperty<QDeclarativeNdefRecord> *list)
{
    QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object);
    if (nearField) {
        qDeleteAll(nearField->m_message);
        nearField->m_message.clear();
        if (!nearField->m_messageUpdating)
            emit nearField->messageRecordsChanged();
    }
}

void QDeclarativeNearField::append_filter(QDeclarativeListProperty<QDeclarativeNdefFilter> *list,
                                           QDeclarativeNdefFilter *filter)
{
    QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object);
    if (!nearField)
        return;

    filter->setParent(nearField);
    nearField->m_filter.append(filter);
    emit nearField->filterChanged();

    if (nearField->m_componentCompleted)
        nearField->registerMessageHandler();
}

int QDeclarativeNearField::count_filters(QDeclarativeListProperty<QDeclarativeNdefFilter> *list)
{
    QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object);
    if (!nearField)
        return 0;

    return nearField->m_filter.count();
}

QDeclarativeNdefFilter *QDeclarativeNearField::at_filter(QDeclarativeListProperty<QDeclarativeNdefFilter> *list,
                                   int index)
{
    QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object);
    if (!nearField)
        return 0;

    return nearField->m_filter.at(index);
}

void QDeclarativeNearField::clear_filter(QDeclarativeListProperty<QDeclarativeNdefFilter> *list)
{
    QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object);
    if (!nearField)
        return;

    qDeleteAll(nearField->m_filter);
    nearField->m_filter.clear();
    emit nearField->filterChanged();
    if (nearField->m_componentCompleted)
        nearField->registerMessageHandler();
}