/***************************************************************************
**
** Copyright (C) 2013 Research In Motion
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtBluetooth module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
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** accordance with the commercial license agreement provided with the
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
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**
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** $QT_END_LICENSE$
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****************************************************************************/


#include "qbluetoothtransferreply_qnx_p.h"
#include "qbluetoothaddress.h"

#include "qbluetoothtransferreply.h"

#include <QFuture>
#include <QFutureWatcher>
#include <QtConcurrentRun>

#include "qnx/ppshelpers_p.h"
#include <QSocketNotifier>
#include <QtCore/QVector>

#include <QtCore/private/qcore_unix_p.h>

#include <QTime>
#include <QDir>
#include <QCoreApplication>

static const QString agentPath(QStringLiteral("/accounts/1000/shared/misc/"));
static bool busy;

QT_BEGIN_NAMESPACE

QBluetoothTransferReplyQnx::QBluetoothTransferReplyQnx(QIODevice *input, const QBluetoothTransferRequest &request,
                                                       QBluetoothTransferManager *parent)
:   QBluetoothTransferReply(parent), tempfile(0), source(input),
    m_running(false), m_finished(false),
    m_error(QBluetoothTransferReply::NoError), m_errorStr()
{
    setRequest(request);
    setManager(parent);

    if (!input) {
        qCWarning(QT_BT_QNX) << "Invalid input device (null)";
        m_errorStr = QBluetoothTransferReply::tr("Invalid input device (null)");
        m_error = QBluetoothTransferReply::FileNotFoundError;
        m_finished = true;
        return;
    }

    ppsRegisterControl();
    //qsrand(QTime::currentTime().msec());
    //m_agent_path = agentPath;
    //m_agent_path.append(QString::fromLatin1("/%1").arg(qrand()));
    ppsRegisterForEvent(QStringLiteral("opp_update"), this);
    ppsRegisterForEvent(QStringLiteral("opp_complete"), this);
    ppsRegisterForEvent(QStringLiteral("opp_cancelled"), this);

    QMetaObject::invokeMethod(this, "start", Qt::QueuedConnection);
    m_running = true;
}

/*!
    Destroys the QBluetoothTransferReply object.
*/
QBluetoothTransferReplyQnx::~QBluetoothTransferReplyQnx()
{
    removeTempFile();
    delete tempfile;
    ppsUnregisterControl(this);
}

bool QBluetoothTransferReplyQnx::start()
{
    m_error = QBluetoothTransferReply::NoError;
    m_errorStr = QString();

    QFile *file = qobject_cast<QFile *>(source);

    if (!file){
        // Deleting temporary files in case of app crash
        QDir directory(agentPath);
        QString appName = QStringLiteral("Qt5OPP_tmp") + QCoreApplication::applicationName();
        if (directory.exists(appName) && !busy) {
            QFile file(agentPath + appName);
            file.remove();
        }
        else if (directory.exists(appName) && busy) {
            m_errorStr = QBluetoothTransferReply::tr("Resource busy.");
            m_error = QBluetoothTransferReply::ResourceBusyError;
            m_finished = true;
            m_running = false;
            emit QBluetoothTransferReply::error(m_error);
            emit finished(this);
            return false;
        }
        if (!source->isReadable()) {
            m_errorStr = QBluetoothTransferReply::tr("QIODevice cannot be read. "
                                                     "Make sure it is open for reading.");
            m_error = QBluetoothTransferReply::IODeviceNotReadableError;
            m_finished = true;
            m_running = false;
            emit QBluetoothTransferReply::error(m_error);
            emit finished(this);
            return false;
        }
        QString fileName = agentPath + QStringLiteral("Qt5OPP_tmp");
        tempfile = new QFile(fileName);
        tempfile->open(QIODevice::WriteOnly);

        QFutureWatcher<bool> *watcher = new QFutureWatcher<bool>();
        QObject::connect(watcher, SIGNAL(finished()), this, SLOT(copyDone()));
        QFuture<bool> results = QtConcurrent::run(QBluetoothTransferReplyQnx::copyToTempFile, tempfile, source);
        watcher->setFuture(results);
        busy = true;

    } else {
        if (!file->exists()) {
            m_errorStr = QBluetoothTransferReply::tr("Source file does not exist");
            m_error = QBluetoothTransferReply::FileNotFoundError;
            m_finished = true;
            m_running = false;
            emit QBluetoothTransferReply::error(m_error);
            emit finished(this);
            return false;
        }
        if (request().address().isNull()) {
            m_errorStr = QBluetoothTransferReply::tr("Invalid target address");
            m_error = QBluetoothTransferReply::HostNotFoundError;
            m_finished = true;
            m_running = false;
            emit QBluetoothTransferReply::error(m_error);
            emit finished(this);
            return false;
        }
        startOPP(file->fileName());
    }
    return true;
}

bool QBluetoothTransferReplyQnx::copyToTempFile(QIODevice *to, QIODevice *from)
{
    QVector<char> block(4096);
    int size;

    while ((size = from->read(block.data(), block.size())) > 0) {
        if (size != to->write(block.data(), size))
            return false;
    }

    return true;
}

void QBluetoothTransferReplyQnx::copyDone()
{
    startOPP(tempfile->fileName());
    QObject::sender()->deleteLater();
}

void QBluetoothTransferReplyQnx::startOPP(QString filename)
{
    qCDebug(QT_BT_QNX) << "Sending push object command"
                       << request().address().toString() << filename;
    ppsSendOpp("push_object", filename.toUtf8(), request().address(), this);
}

QBluetoothTransferReply::TransferError QBluetoothTransferReplyQnx::error() const
{
    return m_error;
}

QString QBluetoothTransferReplyQnx::errorString() const
{
    return m_errorStr;
}

void QBluetoothTransferReplyQnx::controlReply(ppsResult result)
{
    if (!result.errorMsg.isEmpty()) {
        m_errorStr = result.errorMsg;
        m_error = QBluetoothTransferReply::UnknownError;
        emit QBluetoothTransferReply::error(m_error);
        emit finished(this);
    }
}

void QBluetoothTransferReplyQnx::controlEvent(ppsResult result)
{
    if (result.msg == QStringLiteral("opp_cancelled")) {
        qCDebug(QT_BT_QNX) << "opp cancelled" << result.errorMsg << result.error;
        removeTempFile();
        if (m_running)
            return;
        m_finished = true;
        m_running = false;
//        bool ok;
//        int reason = result.dat.at(result.dat.indexOf(QStringLiteral("reason")) + 1).toInt(&ok);
//        if (ok) {
//            switch (reason) {
//            case 1: m_error = QBluetoothTransferReply::UserCanceledTransferError;
//            case 3: m_error = QBluetoothTransferReply::UserCanceledTransferError;
//            }
//        } else {
        m_errorStr = result.errorMsg;
        m_error = QBluetoothTransferReply::UnknownError;
        emit QBluetoothTransferReply::error(m_error);
//      }
        emit finished(this);
    } else if (result.msg == QStringLiteral("opp_update")) {
        bool ok;
        qint64 sentBytes = result.dat.at(result.dat.indexOf(QStringLiteral("sent")) + 1).toDouble(&ok);
        if (!ok) {
            qCWarning(QT_BT_QNX) << "Could not convert sent bytes";
            return;
        }
        qint64 totalBytes = result.dat.at(result.dat.indexOf(QStringLiteral("total")) + 1).toDouble(&ok);
        if (!ok) {
            qCWarning(QT_BT_QNX) << "Could not convert total bytes";
            return;
        }
        qCDebug(QT_BT_QNX) << "opp update" << sentBytes << totalBytes;
        emit transferProgress(sentBytes, totalBytes);
    } else if (result.msg == QStringLiteral("opp_complete")) {
        qCDebug(QT_BT_QNX) << "opp complete";
        removeTempFile();
        m_finished = true;
        m_running = false;
        emit finished(this);
    }
}

/*!
    Returns true if this reply has finished; otherwise returns false.
*/
bool QBluetoothTransferReplyQnx::isFinished() const
{
    return m_finished;
}

/*!
    Returns true if this reply is running; otherwise returns false.
*/
bool QBluetoothTransferReplyQnx::isRunning() const
{
    return m_running;
}

void QBluetoothTransferReplyQnx::abort()
{
    //not supported yet
}

void QBluetoothTransferReplyQnx::removeTempFile()
{
    if (tempfile) {
        if (tempfile->exists()) {
            tempfile->remove();
            busy = false;
        }
    }
}

#include "moc_qbluetoothtransferreply_qnx_p.cpp"

QT_END_NAMESPACE