/*
 # Copyright (c) 2009, 2010 - OpenSLX Project, Computer Center University of
 # Freiburg
 #
 # This program is free software distributed under the GPL version 2.
 # See http://openslx.org/COPYING
 #
 # If you have any feedback please consult http://openslx.org/feedback and
 # send your suggestions, praise, or complaints to feedback@openslx.org
 #
 # General information about OpenSLX can be found at http://openslx.org/
 # -----------------------------------------------------------------------------
 # clientConfigDialog.cpp
 #  - graphical interface
 #  - all configuration used by pvs/pvsgui is done here
 # -----------------------------------------------------------------------------
 */

#include <QtDebug>
#include "clientConfigDialog.h"
#include <cerrno>
#include <cstdlib>
#include <cstring>

// For getting the network interface list:
#ifdef __linux
# include <sys/ioctl.h>
# include <net/if.h>
#endif

using namespace std;

ClientConfigDialog::ClientConfigDialog(QWidget *parent) :
        QDialog(parent),
        _interfaceListModel(0)
{
    setupUi(this);
    connect(this, SIGNAL(accepted()), this, SLOT(writeSettings()));
    connect(radioButtonOtherRO, SIGNAL(clicked()), this,
            SLOT(checkPermissions()));
    connect(reloadInterfaceListButton, SIGNAL(clicked()), this, SLOT(reloadNetworkInterfaceList()));
    reloadNetworkInterfaceList();
    interfaceList->setModel(_interfaceListModel);
    interfaceList->setModelColumn(0);

}

ClientConfigDialog::~ClientConfigDialog()
{

}

////////////////////////////////////////////////////////////////////////////////
// Public

void ClientConfigDialog::open()
{
    readSettings();
    setVisible(true);
}

void ClientConfigDialog::readSettings()
{
    if (_settings.value("Display/location").isNull())
        comboBox->setCurrentIndex(1);
    else
        comboBox->setCurrentIndex(_settings.value("Display/location").toInt());

    if (_settings.value("Permissions/vnc_lecturer").toString() == "rw")
        radioButtonLecturerRW->setChecked(true);
    else if (_settings.value("Permissions/vnc_lecturer").toString() == "ro")
        radioButtonLecturerRO->setChecked(true);
    else
        radioButtonLecturerNO->setChecked(true);
    if (_settings.value("Permissions/vnc_other").toString() == "rw")
        radioButtonOtherRW->setChecked(true);
    else if (_settings.value("Permissions/vnc_other").toString() == "ro")
        radioButtonOtherRO->setChecked(true);
    else
        radioButtonOtherNO->setChecked(true);
    checkBoxAllowChat->setChecked(
        _settings.value("Permissions/allow_chat").toBool());
    checkBoxAllowFiletransfer->setChecked(_settings.value(
                                              "Permissions/allow_filetransfer").toBool());

    if(!_settings.value("Muticast/interface").isNull())
        interfaceList->setEditText(_settings.value("Multicast/interface").toString());

    qDebug("[%s] Setting read from: '%s'", metaObject()->className(),
           qPrintable(_settings.fileName()));
}

void ClientConfigDialog::writeSettings()
{
    _settings.setValue("Display/location", comboBox->currentIndex());
    if (radioButtonLecturerRW->isChecked())
        _settings.setValue("Permissions/vnc_lecturer", "rw");
    else if (radioButtonLecturerRO->isChecked())
        _settings.setValue("Permissions/vnc_lecturer", "ro");
    else
        _settings.setValue("Permissions/vnc_lecturer", "no");
    if (radioButtonOtherRW->isChecked())
        _settings.setValue("Permissions/vnc_other", "rw");
    else if (radioButtonOtherRO->isChecked())
        _settings.setValue("Permissions/vnc_other", "ro");
    else
        _settings.setValue("Permissions/vnc_other", "no");
    _settings.setValue("Permissions/allow_chat", checkBoxAllowChat->isChecked());
    _settings.setValue("Permissions/allow_filetransfer",
                       checkBoxAllowFiletransfer->isChecked());
    _settings.setValue("Multicast/interface", interfaceList->currentText());
    _settings.sync();
    emit configChanged();

    qDebug("[%s] Settings written to: '%s'.", metaObject()->className(),
           qPrintable(_settings.fileName()));
}

////////////////////////////////////////////////////////////////////////////////
// Private

void ClientConfigDialog::checkPermissions()
{
    if (radioButtonLecturerNO->isChecked() && radioButtonOtherRO->isChecked())
        radioButtonLecturerRO->setChecked(true);
}

void ClientConfigDialog::reloadNetworkInterfaceList()
{
#ifdef __linux
    static struct ifreq ifreqs[20];
    ifconf ifconfigs;
    memset(&ifconfigs, 0, sizeof(ifconfigs));
    ifconfigs.ifc_len = sizeof(ifreqs);
    ifconfigs.ifc_buf = (char*)&ifreqs;

    int nosock = socket(AF_INET, SOCK_STREAM, 0);
    if (nosock < 0)
    {
        qWarning() << "Could not get a socket descriptor:" << strerror(errno);
    }
    int retval;
    if ((retval = ioctl(nosock, SIOCGIFCONF, (char*)(&ifconfigs))) < 0)
    {
        qWarning() << "Could not  get the list of interfaces:" << strerror(errno);
        return;
    }

    QStringList interfaces;
    for(int i = 0; i < ifconfigs.ifc_len/sizeof(struct ifreq); i++)
    {
        char ifname[IFNAMSIZ + 1];
        strncpy(ifname, ifreqs[i].ifr_name, IFNAMSIZ);
        ifname[IFNAMSIZ] = '\0';
        interfaces << QString::fromLocal8Bit(ifname);
    }
    if(!_interfaceListModel)
        _interfaceListModel = new QStringListModel(interfaces, this);
    else
        _interfaceListModel->setStringList(interfaces);
#else
# warning "We have no way to get your system's network interface list. Some porting may be required."
#endif
}