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#include "qlowenergyprocess_p.h"

QT_BEGIN_NAMESPACE

Q_GLOBAL_STATIC(QLowEnergyProcess, processInstance)

/*!
 * Private constructor. Constructs the new QLowEnergyProcess, sets variables and connects
 * signal to a slot.
 */
QLowEnergyProcess::QLowEnergyProcess()
{
    m_process = new QProcess();
    connected = false;
    m_counter = 0;
    connect(m_process, SIGNAL(readyReadStandardOutput()), this, SLOT(replyRead()));
}

/*!
    Destroys the QLowEnergyProcess object.
*/
QLowEnergyProcess::~QLowEnergyProcess()
{
    delete m_process;
}

/*!
    Returns the instance of this clas. This class is a singleton class.
*/

QLowEnergyProcess *QLowEnergyProcess::instance()
{
    return processInstance();
}

/*!
    Returns the QProcess that this class is using.
*/
QProcess *QLowEnergyProcess::getProcess()
{

    return m_process;
}

/*!
    Slot that emits a signal replySend. This slot is connected with QProcess signal
    and it is called whenever something comes to output.
*/
void QLowEnergyProcess::replyRead()
{
    QByteArray result = m_process->readAll();
    QString back = QString::fromLocal8Bit(result.data());
    if (back.size() > 10)
        emit replySend(back);
}

/*!
    Starts the process with \a command. This method is used only when starting the
    process.

    \sa executeCommand()
*/
void QLowEnergyProcess::startCommand(const QString &command)
{
    m_process->start(command);
    if (!m_process->waitForStarted())
        qDebug() << "Could not start the process under the command: "<<command;
}

/*!
    Executes the \a command. This method is called after process started.

    \sa startCommand()
*/
void QLowEnergyProcess::executeCommand(const QString &command)
{
    m_process->write(command.toUtf8().constData());
}

/*!
    Terminate running process.
*/
void QLowEnergyProcess::endProcess()
{
    m_counter--;
    if (m_counter == 0) {
        executeCommand(QStringLiteral("disconnect"));
        executeCommand(QStringLiteral("\n"));
        connected = false;
        m_process->terminate();
    }
}

bool QLowEnergyProcess::isConnected() const
{
    return connected;
}

void QLowEnergyProcess::addConnection()
{
    m_counter++;
    connected = true;
}

QT_END_NAMESPACE