#include <QFileSystemWatcher>
#include <QFile>

#include <QDebug>

#include "CCWakelineAbstraction.h"
#include "plugin.h"

/**
 * this is based on a solution from:
 * https://embeddeduse.com/2018/09/18/monitoring-sys-files-qfilesystemwatcher/
 *
 */

CCWakelineAbstraction::CCWakelineAbstraction(hwinf *dc, QObject *parent)
    : QObject(parent)
    , dc(dc)
{
    auto ccWakeMonitor = new QFileSystemWatcher(this);

    ccWakeMonitor->addPath("/sys/class/leds/wakeupctrl_cc/brightness");
    connect(ccWakeMonitor, &QFileSystemWatcher::fileChanged,
                this, &CCWakelineAbstraction::ccWakeChanged);

    qCritical() << "... init CCWakelineAbstraction";
}


void CCWakelineAbstraction::ccWakeChanged(const QString &path)
{
    QFile ccWakeFile(path);
     if (!ccWakeFile.open(QIODevice::ReadOnly)) {
         qWarning() << "ERROR: Could not open ccWakeFile file.";
         return;
     }
     auto ccWake = ccWakeFile.readAll();
     if (!ccWake.isEmpty()) {
         int state = ccWake.at(0);
         //qCritical() << "INFO: ccWake = " << state;
         switch (state) {
         case 0x30:  // '1'
             qCritical() << "INFO: ccWake -> sleep";
             this->dc->credit_switchWake(true); // switch 'sleep'
             break;
         case 0x31:  // '0'
             qCritical() << "INFO: ccWake -> wake";
             this->dc->credit_switchWake(false); // switch 'wake'
             break;
         }
     }
}