/*!
 *
 * Copyright (c) 2019-2019 Diality Inc. - All Rights Reserved.
 * \copyright                                                       \n
 *          THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM,  \n
 *          IN PART OR IN WHOLE,                                    \n
 *          WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER. \n
 *
 * \file    filehandler.cpp
 * \date    2019/09/30
 * \author  Behrouz NematiPour
 *
 */
#include "filehandler.h"

#include <sys/mount.h>
//Qt
#include <QDebug>
#include <QFileInfo>

// Project

using namespace Storage;
FileHandler::FileHandler(QObject *parent) : QObject(parent)
{
    connect(&fsWatcher, SIGNAL(directoryChanged(QString)),
            this      ,   SLOT(directoryChanged(QString)));
}

bool FileHandler::init()
{
    fsWatcher.addPath("/dev/");
    return true;
}

void FileHandler::directoryChanged(const QString &vPath)
{
    Q_UNUSED(vPath)
    bool available = false;
    QString device = "";
    if ( ! _mounted ) {
        for (int a = 'a'; a <= 'z'; a++) {
            device = QString("/dev/sd%1%2").arg(QChar(a)).arg(QChar('1'));
            if (QFileInfo::exists(device)) {
                available = true;
                break;
            }
            umount(device.toLatin1().constData());
        }
    }
    if (available) {
        if ( ! _mounted ) {
            if ( mountUsb(device) ) {
                _mounted = true;
            } else {
                qDebug() << tr("1 - USB drive %1 can't be mounted").arg(_usbMount);
            }
        }
    } else {
        umount(_usbMount);
        _mounted = false;
        qDebug() << tr("2 - USB drive %1 can't be mounted").arg(_usbMount);
        return;
    }
    emit usbStatusChanged(available);
}

bool FileHandler::mountUsb(QString device)
{
    int result = mount(device.toLatin1().constData(), _usbMount, _usbfsys, 0, "");
    if (result == 0) {
         qDebug() << tr("USB flash drive %1 has been mounted to %2").arg(device).arg(_usbMount);
    } else {
        return false;
    }
    return true;
}