#include <QDebug>
#include <QStringList>
#include <stdio.h>
#include <sys/types.h>
#include <ifaddrs.h>
#include <netinet/in.h>
#include <string.h>
#include <arpa/inet.h>
#include "config.h"

#define GROUP_GENERAL   "General"
#define GROUP_MODELINES "Modelines"
#define GROUP_SPECIFIC  "SpecificSettings"
#define DISPLAY_KEY     "display"
#define DISPLAY_DEFAULT ":0"
#define IFACE_KEY       "interface"
#define IFACE_DEFAULT   "eth0"

Config * Config::Instance = NULL;

//_____________________________________________________________________________


Config::Config()
{
    // Defaults
    display = ":0";
    interface = "eth0";
}

//_____________________________________________________________________________


void Config::loadSettings(QString _file)
{
    // Open setting file
    settingsPath = _file;
    QSettings settings(settingsPath, QSettings::NativeFormat);

    // Get general information
    settings.beginGroup(GROUP_GENERAL);
    display = settings.value(DISPLAY_KEY, DISPLAY_DEFAULT).toString();
    interface = settings.value(IFACE_KEY, IFACE_DEFAULT).toString();
    settings.endGroup();


    /* Check for ip specific settings */
    // Get local ip
    QString IPV4 = getIPV4ofInterface(interface);

    // Find any information saved about this ip
    settings.beginGroup(GROUP_SPECIFIC);
    if ( settings.contains(IPV4) )
        ipSpecificXConf = settings.value(IPV4).toStringList();
    settings.endGroup();


    /* Get the "must-have-modelines" */

    int size = settings.beginReadArray(GROUP_MODELINES);
    for (int i = 0; i < size; ++i) {
        settings.setArrayIndex(i);
        qDebug()<< settings.value("Modeline").toString();
        modeLines.append(settings.value("Modeline").toString());
    }
    settings.endArray();



//    // Get all keys in this group (Keys are modenames)
//    QStringList modeKeys = settings.allKeys();

//    // Get the modeline for each key
//    for (QStringList::const_iterator i = modeKeys.constBegin(); i != modeKeys.constEnd(); ++i)
//    {
//      qDebug()<< "found" << *i;
//        // Prepend the name and save in list
//        modeLines.insert(*i, settings.value(*i).toStringList());
//    }
//    settings.endGroup();

}

//_____________________________________________________________________________


QString Config::getIPV4ofInterface(QString _if) const
{
    struct ifaddrs * ifAddrStruct=NULL;
    struct ifaddrs * ifa=NULL;
    void * tmpAddrPtr=NULL;
    QString result;

    getifaddrs(&ifAddrStruct);

    // Iterate through the adresses.
    for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next)
    {
        // If the address is IP V4 and the interface is _if
        if (ifa ->ifa_addr->sa_family==AF_INET && ( strcmp(ifa->ifa_name, _if.toUtf8().constData()) == 0) )
        {
            // Get the IP
            tmpAddrPtr=&((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;

            // convert to readable form
            char addressBuffer[INET_ADDRSTRLEN];
            inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
            result = addressBuffer;
        }
    }

    // clean up
    if (ifAddrStruct!=NULL)
        freeifaddrs(ifAddrStruct);

    return result;
}