#include "adcinterface.h"
#include <linux/input.h>
#include <QSocketNotifier>
#include <QFile>
#include <QDebug>

ADCInterface::ADCInterface(const QString &devName, QObject *parent) : QObject(parent),
    m_devName(devName),
    m_file(Q_NULLPTR),
    m_notfier(Q_NULLPTR)
{
    //    /dev/input/event2	sunxi-gpadc0
    //    /dev/input/event3	sunxi-gpadc1
    //    /dev/input/event4	sunxi-gpadc2
    //    /dev/input/event5	sunxi-gpadc3
    if(m_devName.contains("/dev/input/event"))
    {
        m_index = m_devName.right(1).toInt()-2;;
    }
}

ADCInterface::~ADCInterface()
{
    if(m_file && m_file->isOpen())
    {
        m_file->close();

    }
}

void ADCInterface::open(bool bOpen)
{
    QString cmd=QString("echo gpadc%1,%2> /sys/class/gpadc/status")
            .arg(adcIndex())
            .arg(bOpen);

    qDebug()<< cmd;
    system(cmd.toLocal8Bit().constData());
}

bool ADCInterface::open()
{
    bool bRet = false;
    if(m_file != Q_NULLPTR)
    {
        return !bRet;
    }
    open(true);
    m_file = new QFile(m_devName, this);
    if(m_file->open(QFile::ReadWrite| QFile::Unbuffered))
    {
        m_notfier = new QSocketNotifier(m_file->handle(), QSocketNotifier::Read, this);
        QSocketNotifier *notifier = new QSocketNotifier(m_file->handle(), QSocketNotifier::Read, this);
        connect(notifier, &QSocketNotifier::activated, this, [=](){
            union LED_EVENT{
                input_event e;
                char buf[200];
            };
            LED_EVENT data;
            m_file->read(data.buf, sizeof(input_event));
            if(data.e.type == EV_MSC)
            {
                emit readRead(data.e.value);
            }
        });
    }
}

void ADCInterface::close()
{
    open(false);
    if(m_file)
    {
        m_file->close();
        delete m_file;
        delete m_notfier;
    }
}

int ADCInterface::adcIndex()
{
    return m_index;
}