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#include "s60themeconvert.h"

#include <QtGui>

#include <QtWebKit>

static const int pictureSize = 256;

static const char* const msgPartNotInTdf = "  Warning: The .tdf file does not have a part for ";

static const char* const msgSvgNotFound = "  Fatal: Could not find part .svg ";

void dumpPartPictures(const QHash<QString, QPicture> &partPictures) {

    foreach (const QString &partKey, partPictures.keys()) {

        QPicture partPicture = partPictures.value(partKey);

        qDebug() << partKey << partPicture.boundingRect();

        QImage image(partPicture.boundingRect().size(), QImage::Format_ARGB32);

        image.fill(Qt::transparent);

        QPainter p(&image);

        partPicture.play(&p);

        image.save(partKey + QString::fromLatin1(".png"));

    }

}

void dumpColors(const QHash<QPair<QString, int>, QColor> &colors) {

    foreach (const QColor &color, colors.values()) {

        const QPair<QString, int> key = colors.key(color);

        qDebug() << key << color;

    }

}

class WebKitSVGRenderer : public QWebView

{

    Q_OBJECT

public:

    WebKitSVGRenderer(QWidget *parent = 0);

    QPicture svgToQPicture(const QString &svgFileName);

private slots:

    void loadFinishedSlot(bool ok);

private:

    QEventLoop m_loop;

    QPicture m_result;

};

WebKitSVGRenderer::WebKitSVGRenderer(QWidget *parent)

    : QWebView(parent)

{

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

    setFixedSize(pictureSize, pictureSize);

    QPalette pal = palette();

    pal.setColor(QPalette::Base, Qt::transparent);

    setPalette(pal);

}

QPicture WebKitSVGRenderer::svgToQPicture(const QString &svgFileName)

{

    load(QUrl::fromLocalFile(svgFileName));

    m_loop.exec();

    return m_result;

}

void WebKitSVGRenderer::loadFinishedSlot(bool ok)

{

    // crude error-checking

    if (!ok)

        qDebug() << "Failed loading " << qPrintable(url().toString());

    page()->mainFrame()->evaluateJavaScript(QString::fromLatin1(

        "document.rootElement.preserveAspectRatio.baseVal.align = SVGPreserveAspectRatio.SVG_PRESERVEASPECTRATIO_NONE;"

        "document.rootElement.style.width = '100%';"

        "document.rootElement.style.height = '100%';"

        "document.rootElement.width.baseVal.newValueSpecifiedUnits(SVGLength.SVG_LENGTHTYPE_PERCENTAGE, 100);"

        "document.rootElement.height.baseVal.newValueSpecifiedUnits(SVGLength.SVG_LENGTHTYPE_PERCENTAGE, 100);"

    ));

    m_result = QPicture(); // "Clear"

    QPainter p(&m_result);

    page()->mainFrame()->render(&p);

    p.end();

    m_result.setBoundingRect(QRect(0, 0, pictureSize, pictureSize));

    m_loop.exit();

}

QPair<QString, int> colorIdPair(const QString &colorID)

{

    QPair<QString, int> result;

    QString idText = colorID;

    idText.remove(QRegExp(QString::fromLatin1("[0-9]")));

    if (QS60Style::colorListKeys().contains(idText)) {

        QString idNumber = colorID;

        idNumber.remove(QRegExp(QString::fromLatin1("[a-zA-Z]")));

        result.first = idText;

        result.second = idNumber.toInt();

    }

    return result;

}

bool parseTdfFile(const QString &tdfFile,

        QHash<QString, QString> &partSvgs,

        QHash<QPair<QString, int>, QColor> &colors)

{

    QFile file(tdfFile);

    if (!file.open(QIODevice::ReadOnly))

        return false;

    const QLatin1String elementKey("element");

    const QLatin1String partKey("part");

    const QLatin1String elementIdKey("id");

    const QLatin1String layerKey("layer");

    const QLatin1String layerFileNameKey("filename");

    const QLatin1String layerColourrgbKey("colourrgb");

    const QString annoyingPrefix = QString::fromLatin1("S60_2_6%");

    QXmlStreamReader reader(&file);

    QString partId;

    QPair<QString, int> colorId;

    // Somebody with a sense of aesthetics may implement proper XML parsing, here.

    while (!reader.atEnd()) {

        const QXmlStreamReader::TokenType token = reader.readNext();

        switch (token) {

            case QXmlStreamReader::StartElement:

                if (reader.name() == elementKey || reader.name() == partKey) {

                    QString id = reader.attributes().value(elementIdKey).toString();

                    if (QS60Style::partKeys().contains(id))

                        partId = id;

                    else if (!id.isEmpty() && id.at(id.length()-1).isDigit())

                        colorId = colorIdPair(id);

                    else if (QS60Style::partKeys().contains(id.mid(annoyingPrefix.length())))

                        partId = id.mid(annoyingPrefix.length());

                } else if(reader.name() == layerKey) {

                    if (!partId.isEmpty()) {

                        const QString svgFile = reader.attributes().value(layerFileNameKey).toString();

                        partSvgs.insert(partId, svgFile);

                        partId.clear();

                    } else if (!colorId.first.isEmpty()) {

                        const QColor colorValue(reader.attributes().value(layerColourrgbKey).toString().toInt(NULL, 16));

                        colors.insert(colorId, colorValue);

                        colorId.first.clear();

                    }

                }

                break;

            case QXmlStreamReader::EndElement:

                if (reader.tokenString() == elementKey || reader.name() == partKey)

                    partId.clear();

                break;

            default:

                break;

        }

    }

    return true;

}

bool loadThemeFromTdf(const QString &tdfFile,

        QHash<QString, QPicture> &partPictures,

        QHash<QPair<QString, int>, QColor> &colors)

{

    QHash<QString, QString> parsedPartSvgs;

    QHash<QString, QPicture> parsedPartPictures;

    QHash<QPair<QString, int>, QColor> parsedColors;

    bool success = parseTdfFile(tdfFile, parsedPartSvgs, parsedColors);

    if (!success)

        return false;

    const QString tdfBasePath = QFileInfo(tdfFile).absolutePath();

    WebKitSVGRenderer renderer;

    foreach (const QString &partKey, QS60Style::partKeys()) {

        qDebug() << partKey;

        QString tdfFullName;

        if (parsedPartSvgs.contains(partKey)) {

            tdfFullName = tdfBasePath + QDir::separator() + parsedPartSvgs.value(partKey);

        } else {

            qWarning() << msgPartNotInTdf << partKey;

            tdfFullName = tdfBasePath + QDir::separator() + partKey + QLatin1String(".svg");

        }

        if (!QFile(tdfFullName).exists()) {

            qWarning() << msgSvgNotFound << QDir::toNativeSeparators(tdfFullName);

            return false;

        }

        const QPicture partPicture = renderer.svgToQPicture(tdfFullName);

        parsedPartPictures.insert(partKey, partPicture);

    }

//    dumpPartPictures(parsedPartPictures);

//    dumpColors(colors);

    partPictures = parsedPartPictures;

    colors = parsedColors;

    return true;

}

bool S60ThemeConvert::convertTdfToBlob(const QString &themeTdf, const QString &themeBlob)

{

    QHash<QString, QPicture> partPictures;

    QHash<QPair<QString, int>, QColor> colors;

    if (!::loadThemeFromTdf(themeTdf, partPictures, colors))

        return false;

    QS60Style style;

    style.setS60Theme(partPictures, colors);

    return style.saveS60ThemeToBlob(themeBlob);

}

bool parseDesignFile(const QString &designFile,

        QHash<QPair<QString, int>, QColor> &colors)

{

    const QLatin1String elementKey("element");

    const QLatin1String elementIdKey("id");

    const QLatin1String colorKey("defaultcolour_rgb");

    QFile file(designFile);

    if (!file.open(QIODevice::ReadOnly))

        return false;

    QXmlStreamReader reader(&file);

    QPair<QString, int> colorId;

    // Somebody with a sense of aesthetics may implement proper XML parsing, here.

    while (!reader.atEnd()) {

        const QXmlStreamReader::TokenType token = reader.readNext();

        switch (token) {

            case QXmlStreamReader::StartElement:

                if (reader.name() == elementKey) {

                    const QString colorString = reader.attributes().value(colorKey).toString();

                    if (!colorString.isEmpty()) {

                        const QString colorId = reader.attributes().value(elementIdKey).toString();

                        colors.insert(colorIdPair(colorId), colorString.toInt(NULL, 16));

                    }

                }

            default:

                break;

        }

    }

    return true;

}

bool loadDefaultTheme(const QString &themePath,

        QHash<QString, QPicture> &partPictures,

        QHash<QPair<QString, int>, QColor> &colors)

{

    const QDir dir(themePath);

    if (!dir.exists())

        return false;

    if (!parseDesignFile(themePath + QDir::separator() + QString::fromLatin1("defaultdesign.xml"), colors))

        return false;

    WebKitSVGRenderer renderer;

    foreach (const QString &partKey, QS60Style::partKeys()) {

        const QString partFileName = partKey + QLatin1String(".svg");		

        const QString partFile(dir.absolutePath() + QDir::separator() + partFileName);

        if (!QFile::exists(partFile)) {

            qWarning() << msgSvgNotFound << partFileName;

            return false;

        }

        const QPicture partPicture = renderer.svgToQPicture(partFile);

        partPictures.insert(partKey, partPicture);

    }

    return true;

}

bool S60ThemeConvert::convertDefaultThemeToBlob(const QString &themePath, const QString &themeBlob)

{

    QHash<QString, QPicture> partPictures;

    QHash<QPair<QString, int>, QColor> colors;

    if (!::loadDefaultTheme(themePath, partPictures, colors))

        return false;

    QS60Style style;

    style.setS60Theme(partPictures, colors);

    return style.saveS60ThemeToBlob(themeBlob);

}

#include "s60themeconvert.moc"