#include "settings.h"

Settings *Settings::_instance = 0;

Settings *Settings::getInstance() {

    if (_instance == 0) {
        _instance = new Settings();
        Q_CHECK_PTR(_instance);
    }
    return _instance;
}

Settings::Settings(QObject *parent) :
    QObject(parent)
{
    m_layersNumber = 0;
    m_ui = false;
}

// Read the dmx settings for dmx.xml At the moment we need:
// - The path to the medias folder tree
// - The number of sources/layers controlled by DMX
// - The first DMX channel of each source/layer
// - The universe to bind in OLA
// - Audio device id
// - Show the Ui or not
void Settings::readFromFile(QString file) {
    QFile* xmlFile = new QFile(file);
    if (!xmlFile->open(QIODevice::ReadOnly | QIODevice::Text)) {
        QMessageBox::critical(NULL,"Load XML File Problem",
                              QString("Couldn't open %1 to load settings").arg(file),
                              QMessageBox::Ok);
    // Instead exit give the oportunity to load another file or define the settings
     qCritical("Load XML File Problem");
     exit(1);
    }
    QXmlStreamReader* xmlReader = new QXmlStreamReader(xmlFile);
    while(!xmlReader->atEnd() && !xmlReader->hasError()) {
        QXmlStreamReader::TokenType token = xmlReader->readNext();
        if(token == QXmlStreamReader::StartDocument) {
            continue;
        }
        if(token == QXmlStreamReader::StartElement) {
            if(xmlReader->name() == "lmsAudio") {
                m_ui = xmlReader->attributes().value("ui").toLocal8Bit().toInt();
                m_layersNumber = xmlReader->attributes().value("layersNumber").toLocal8Bit().toInt();
                m_pathmedia = xmlReader->attributes().value("path").toLocal8Bit();
                continue;
            }
            if(xmlReader->name() == "audioDevice") {
                m_audioDeviceQty = xmlReader->attributes().value("devicesNumber").toLocal8Bit().toInt();
                for (uint i = 0; i < m_audioDeviceQty; i++)
                {
                    m_audioDeviceId[i] = xmlReader->attributes().value(QString("id%1").arg(i)).toLocal8Bit().toInt();
                }

            }
            if(xmlReader->name() == "layer") {
                dmxSetting temp;
                temp.address = xmlReader->attributes().value("dmx").toLocal8Bit().toInt() - 1;
                temp.universe = xmlReader->attributes().value("universe").toLocal8Bit().toInt();
                temp.layer = xmlReader->attributes().value("id").toLocal8Bit().toInt();
                m_settings.append(temp);
                if (!m_universe.contains(temp.universe)) {
                    m_universe.insert(temp.universe);
                }
            }
        }
    }
    if(xmlReader->hasError()) {
        QMessageBox::critical(NULL,"File xml Parse Error ", xmlReader->errorString(), QMessageBox::Ok);
        qWarning("File xml Parse Error %s", xmlReader->errorString().toLatin1().constData());
        // ToDo: manage this, open a dialog to load a new file.
    }
    xmlReader->clear();
    xmlFile->close();
    delete xmlReader;
    delete xmlFile;
    this->printSettings();
}

void Settings::printSettings() {
    qInfo() << "Settings read;\nShow Ui:" << m_ui << "Layers:" << m_layersNumber << "Path:" << m_pathmedia <<"Audio Device qty:" << m_audioDeviceQty;
    for (uint i = 0; i < m_audioDeviceQty; i++)
        qInfo() << "Audio device id:" << m_audioDeviceId[i];
    for (int i = 0; i < m_layersNumber; i++)
        qInfo() << "Layer:" << m_settings[i].layer << "Address:" << m_settings[i].address << "Universe:" << m_settings[i].universe;
}

void Settings::readFile() {
    readFromFile(DEFAULT_FILE);
}