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#include <QtGui>

#include <QtWebKit>

#include <qgeopositioninfosource.h>

#include <qnmeapositioninfosource.h>

#include <qgeosatelliteinfosource.h>

#include <qnetworksession.h>

#include <qnetworkconfigmanager.h>

#include "satellitedialog.h"

#include "mapwindow.h"

QTM_USE_NAMESPACE

// Use the special 'localhost' key for the Google Maps key

const QString GMAPS_STATICMAP_URL_TEMPLATE =  "http://maps.google.com/staticmap?center=%1,%2&zoom=14&size=%3x%4&map type=mobile&markers=%1,%2&key=ABQIAAAAnfs7bKE82qgb3Zc2YyS-oBT2yXp_ZAY8_ufC3CFXhHIE1NvwkxSySz_REpPq-4WZA27OwgbtyR3VcA&sensor=false";

MapWindow::MapWindow(QWidget *parent, Qt::WFlags flags)

        : QMainWindow(parent, flags),

        loading(false),

        usingLogFile(false),

        location(0),

        waitingForFix(false)

{

    webView = new QWebView(this);

    webView->setMaximumSize(640, 480);

    posLabel = new QLabel(this);

    posLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);

    headingAndSpeedLabel = new QLabel(this);

    headingAndSpeedLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);

    dateTimeLabel = new QLabel(this);

    dateTimeLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);

    location = QGeoPositionInfoSource::createDefaultSource(this);

    if (!location) {

        QNmeaPositionInfoSource *nmeaSource = new QNmeaPositionInfoSource(QNmeaPositionInfoSource::SimulationMode, this);

        QFile *logFile = new QFile(QApplication::applicationDirPath()

                                   + QDir::separator() + "nmealog.txt", this);

        nmeaSource->setDevice(logFile);

        location = nmeaSource;

        usingLogFile = true;

    }

    location->setUpdateInterval(5000);

    connect(location, SIGNAL(positionUpdated(QGeoPositionInfo)),

            this, SLOT(positionUpdated(QGeoPositionInfo)));

    connect(webView, SIGNAL(loadStarted()), this, SLOT(loadStarted()));

    connect(webView, SIGNAL(loadFinished(bool)), this, SLOT(loadFinished(bool)));

    QWidget *mainWidget = new QWidget;

    QVBoxLayout *layout = new QVBoxLayout(mainWidget);

    layout->addWidget(webView, 1);

    QVBoxLayout *labelLayout = new QVBoxLayout();

    labelLayout->addWidget(posLabel);

    labelLayout->addWidget(headingAndSpeedLabel);

    labelLayout->addWidget(dateTimeLabel);

    layout->addLayout(labelLayout, 0);

    layout->setSizeConstraint(QLayout::SetMaximumSize);

    int maxHeight = webView->maximumSize().height();

    maxHeight += posLabel->size().height();

    maxHeight += headingAndSpeedLabel->size().height();

    maxHeight += dateTimeLabel->size().height();

    setMaximumHeight(maxHeight);

    int maxWidth = webView->maximumWidth();

    maxWidth = qMin(maxWidth, posLabel->maximumWidth());

    maxWidth = qMin(maxWidth, headingAndSpeedLabel->maximumWidth());

    maxWidth = qMin(maxWidth, dateTimeLabel->maximumWidth());

    setMaximumWidth(maxWidth);

    setCentralWidget(mainWidget);

#if !defined(Q_OS_SYMBIAN)

    resize(300, 300);

#endif

    setWindowTitle(tr("Google Maps Demo"));

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

}

MapWindow::~MapWindow()

{

    location->stopUpdates();

    session->close();

}

void MapWindow::delayedInit()

{

    if (usingLogFile) {

        QMessageBox::information(this, tr("Fetch Google Maps"),

                                 tr("No GPS support detected, using GPS data from a sample log file instead."));

    } else {

        waitForFix();

        location->stopUpdates();

    }

    // Set Internet Access Point

    QNetworkConfigurationManager manager;

    const bool canStartIAP = (manager.capabilities()

                              & QNetworkConfigurationManager::CanStartAndStopInterfaces);

    // Is there default access point, use it

    QTM_PREPEND_NAMESPACE(QNetworkConfiguration) cfg = manager.defaultConfiguration();

    if (!cfg.isValid() || (!canStartIAP && cfg.state() != QTM_PREPEND_NAMESPACE(QNetworkConfiguration)::Active)) {

        QMessageBox::information(this, tr("Fetch Google Maps"), tr(

                                     "Available Access Points not found."));

        return;

    }

    session = new QTM_PREPEND_NAMESPACE(QNetworkSession)(cfg, this);

    session->open();

    session->waitForOpened(-1);

    connect(location, SIGNAL(updateTimeout()), this, SLOT(waitForFix()));

    location->startUpdates();

}

// Brings up a satellite strength dialog box until a position fix is received.

// This will also start the position updates if they are not already started.

void MapWindow::waitForFix() {

    if (waitingForFix)

        return;

    waitingForFix = true;

    QGeoSatelliteInfoSource *satellite = QGeoSatelliteInfoSource::createDefaultSource(this);

    if (satellite) {

        SatelliteDialog *dialog = new SatelliteDialog(this,

                30,

                SatelliteDialog::ExitOnFixOrCancel,

                SatelliteDialog::OrderByPrnNumber,

                SatelliteDialog::ScaleToMaxPossible);

        dialog->connectSources(location, satellite);

        location->startUpdates();

        satellite->startUpdates();

        dialog->exec();

        satellite->stopUpdates();

        delete dialog;

        delete satellite;

    }

    waitingForFix = false;

}

void MapWindow::start()

{

    location->startUpdates();

}

void MapWindow::positionUpdated(const QGeoPositionInfo &info)

{

    QString heading = "?";

    QString speed = "?";

    if (info.hasAttribute(QGeoPositionInfo::Direction))

        heading = QString("%1%2").arg(info.attribute(QGeoPositionInfo::Direction)).arg(QChar(0x00b0));

    if (info.hasAttribute(QGeoPositionInfo::GroundSpeed))

        speed = QString::number(info.attribute(QGeoPositionInfo::GroundSpeed) * 3.6, 'f', 1);

    posLabel->setText(tr("Position: %1").arg(info.coordinate().toString()));

    headingAndSpeedLabel->setText(tr("Bearing %1, travelling at %2 km/h").arg(heading).arg(speed));

    dateTimeLabel->setText(tr("(Last update: %1)").

                           arg(info.timestamp().toLocalTime().time().toString()));

    if (!loading) {

        // Google Maps does not provide maps larger than 640x480

        int width = qMin(webView->width(), 640);

        int height = qMin(webView->height(), 480);

        if ((width == 0) || (height == 0))

            return;

        QString url = GMAPS_STATICMAP_URL_TEMPLATE

                      .arg(QString::number(info.coordinate().latitude()))

                      .arg(QString::number(info.coordinate().longitude()))

                      .arg(QString::number(width))

                      .arg(QString::number(height));

        webView->load(url);

    }

}

void MapWindow::loadStarted()

{

    loading = true;

    webView->setUpdatesEnabled(false);

}

void MapWindow::loadFinished(bool)

{

    loading = false;

    webView->setUpdatesEnabled(true);

}