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#include "bearercloud.h"

#include "cloud.h"

#include <QGraphicsTextItem>

#include <QTimer>

#include <QDateTime>

#include <QHostInfo>

#include <QDebug>

#include <math.h>

#ifndef M_PI

#define M_PI 3.14159265358979323846

#endif

//! [0]

BearerCloud::BearerCloud(QObject *parent)

:   QGraphicsScene(parent), timerId(0)

{

    setSceneRect(-300, -300, 600, 600);

    qsrand(QDateTime::currentDateTime().toTime_t());

    offset[QNetworkConfiguration::Active] = 2 * M_PI * qrand() / RAND_MAX;

    offset[QNetworkConfiguration::Discovered] = offset[QNetworkConfiguration::Active] + M_PI / 6;

    offset[QNetworkConfiguration::Defined] = offset[QNetworkConfiguration::Discovered] - M_PI / 6;

    offset[QNetworkConfiguration::Undefined] = offset[QNetworkConfiguration::Undefined] + M_PI / 6;

    thisDevice = new QGraphicsTextItem(QHostInfo::localHostName());

    thisDevice->setData(0, QLatin1String("This Device"));

    thisDevice->setPos(thisDevice->boundingRect().width() / -2,

                       thisDevice->boundingRect().height() / -2);

    addItem(thisDevice);

    qreal radius = Cloud::getRadiusForState(QNetworkConfiguration::Active);

    QGraphicsEllipseItem *orbit = new QGraphicsEllipseItem(-radius, -radius, 2*radius, 2*radius);

    orbit->setPen(QColor(Qt::green));

    addItem(orbit);

    radius = Cloud::getRadiusForState(QNetworkConfiguration::Discovered);

    orbit = new QGraphicsEllipseItem(-radius, -radius, 2*radius, 2*radius);

    orbit->setPen(QColor(Qt::blue));

    addItem(orbit);

    radius = Cloud::getRadiusForState(QNetworkConfiguration::Defined);

    orbit = new QGraphicsEllipseItem(-radius, -radius, 2*radius, 2*radius);

    orbit->setPen(QColor(Qt::darkGray));

    addItem(orbit);

    radius = Cloud::getRadiusForState(QNetworkConfiguration::Undefined);

    orbit = new QGraphicsEllipseItem(-radius, -radius, 2*radius, 2*radius);

    orbit->setPen(QColor(Qt::lightGray));

    addItem(orbit);

    connect(&manager, SIGNAL(configurationAdded(QNetworkConfiguration)),

            this, SLOT(configurationAdded(QNetworkConfiguration)));

    connect(&manager, SIGNAL(configurationRemoved(QNetworkConfiguration)),

            this, SLOT(configurationRemoved(QNetworkConfiguration)));

    connect(&manager, SIGNAL(configurationChanged(QNetworkConfiguration)),

            this, SLOT(configurationChanged(QNetworkConfiguration)));

    QTimer::singleShot(0, this, SLOT(updateConfigurations()));

}

//! [0]

BearerCloud::~BearerCloud()

{

}

void BearerCloud::cloudMoved()

{

    if (!timerId)

        timerId = startTimer(1000 / 25);

}

void BearerCloud::timerEvent(QTimerEvent *)

{

    QList<Cloud *> clouds;

    foreach (QGraphicsItem *item, items()) {

        if (Cloud *cloud = qgraphicsitem_cast<Cloud *>(item))

            clouds << cloud;

    }

    foreach (Cloud *cloud, clouds)

        cloud->calculateForces();

    bool cloudsMoved = false;

    foreach (Cloud *cloud, clouds)

        cloudsMoved |= cloud->advance();

    if (!cloudsMoved) {

        killTimer(timerId);

        timerId = 0;

    }

}

//! [2]

void BearerCloud::configurationAdded(const QNetworkConfiguration &config)

{

    const QNetworkConfiguration::StateFlags state = config.state();

    configStates.insert(state, config.identifier());

    const qreal radius = Cloud::getRadiusForState(state);

    const int count = configStates.count(state);

    const qreal angle = 2 * M_PI / count;

    Cloud *item = new Cloud(config);

    configurations.insert(config.identifier(), item);

    item->setPos(radius * cos((count-1) * angle + offset[state]),

                 radius * sin((count-1) * angle + offset[state]));

    addItem(item);

    cloudMoved();

}

//! [2]

//! [3]

void BearerCloud::configurationRemoved(const QNetworkConfiguration &config)

{

    foreach (const QNetworkConfiguration::StateFlags &state, configStates.uniqueKeys())

        configStates.remove(state, config.identifier());

    Cloud *item = configurations.take(config.identifier());

    item->setFinalScale(0.0);

    item->setDeleteAfterAnimation(true);

    cloudMoved();

}

//! [3]

//! [4]

void BearerCloud::configurationChanged(const QNetworkConfiguration &config)

{

    foreach (const QNetworkConfiguration::StateFlags &state, configStates.uniqueKeys())

        configStates.remove(state, config.identifier());

    configStates.insert(config.state(), config.identifier());

    cloudMoved();

}

//! [4]

//! [1]

void BearerCloud::updateConfigurations()

{

    QList<QNetworkConfiguration> allConfigurations = manager.allConfigurations();

    while (!allConfigurations.isEmpty())

        configurationAdded(allConfigurations.takeFirst());

    cloudMoved();

}

//! [1]