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#include <qtest.h>
#include <QtTest/QtTest>
#include <QtDeclarative/qdeclarativeengine.h>
#include <QtDeclarative/qdeclarativeimageprovider.h>
#include <private/qdeclarativeimage_p.h>
#include <QImageReader>

// QDeclarativeImageProvider::request() is run in an idle thread where possible
// Be generous in our timeout.
#define TRY_WAIT(expr) \
    do { \
        for (int ii = 0; ii < 10; ++ii) { \
            if ((expr)) break; \
            QTest::qWait(100); \
        } \
        QVERIFY((expr)); \
    } while (false)


class tst_qdeclarativeimageprovider : public QObject
{
    Q_OBJECT
public:
    tst_qdeclarativeimageprovider()
    {
    }

private slots:
    void imageSource();
    void imageSource_data();
    void removeProvider();

private:
    QDeclarativeEngine engine;
};

class TestProvider : public QDeclarativeImageProvider
{
public:
    QImage request(const QString &id, QSize *size, const QSize& requested_size) {
        QImageReader io(SRCDIR "/data/" + id);
        if (size) *size = io.size();
        if (requested_size.isValid())
            io.setScaledSize(requested_size);
        return io.read();
    }
};

void tst_qdeclarativeimageprovider::imageSource_data()
{
    QTest::addColumn<QString>("source");
    QTest::addColumn<QString>("properties");
    QTest::addColumn<QSize>("size");
    QTest::addColumn<QString>("error");

    QTest::newRow("exists") << "image://test/exists.png" << "" << QSize(100,100) << "";
    QTest::newRow("scaled") << "image://test/exists.png" << "sourceSize: \"80x30\"" << QSize(80,30) << "";
    QTest::newRow("missing") << "image://test/no-such-file.png" << "" << QSize()
        << "file::2:1: QML Image: Failed to get image from provider: image://test/no-such-file.png";
    QTest::newRow("unknown provider") << "image://bogus/exists.png" << "" << QSize()
        << "file::2:1: QML Image: Failed to get image from provider: image://bogus/exists.png";

}
    
void tst_qdeclarativeimageprovider::imageSource()
{
    QFETCH(QString, source);
    QFETCH(QString, properties);
    QFETCH(QSize, size);
    QFETCH(QString, error);

    if (!error.isEmpty())
        QTest::ignoreMessage(QtWarningMsg, error.toUtf8());

    engine.addImageProvider("test", new TestProvider);
    QVERIFY(engine.imageProvider("test") != 0);

    QString componentStr = "import Qt 4.7\nImage { source: \"" + source + "\"; " + properties + " }";
    QDeclarativeComponent component(&engine);
    component.setData(componentStr.toLatin1(), QUrl::fromLocalFile(""));
    QDeclarativeImage *obj = qobject_cast<QDeclarativeImage*>(component.create());
    QVERIFY(obj != 0);

    TRY_WAIT(obj->status() == QDeclarativeImage::Loading);

    QCOMPARE(obj->source(), QUrl(source));

    if (error.isEmpty()) {
        TRY_WAIT(obj->status() == QDeclarativeImage::Ready);
        QCOMPARE(obj->width(), 100.0);
        QCOMPARE(obj->height(), 100.0);
        QCOMPARE(obj->pixmap().width(), size.width());
        QCOMPARE(obj->pixmap().height(), size.height());
        QCOMPARE(obj->fillMode(), QDeclarativeImage::Stretch);
        QCOMPARE(obj->progress(), 1.0);
    } else {
        TRY_WAIT(obj->status() == QDeclarativeImage::Error);
    }

    delete obj;
}

void tst_qdeclarativeimageprovider::removeProvider()
{
    engine.addImageProvider("test2", new TestProvider);
    QVERIFY(engine.imageProvider("test2") != 0);

    // add provider, confirm it works
    QString componentStr = "import Qt 4.7\nImage { source: \"image://test2/exists1.png\" }";
    QDeclarativeComponent component(&engine);
    component.setData(componentStr.toLatin1(), QUrl::fromLocalFile(""));
    QDeclarativeImage *obj = qobject_cast<QDeclarativeImage*>(component.create());
    QVERIFY(obj != 0);

    TRY_WAIT(obj->status() == QDeclarativeImage::Loading);
    TRY_WAIT(obj->status() == QDeclarativeImage::Ready);

    QCOMPARE(obj->width(), 100.0);

    // remove the provider and confirm
    QString error("file::2:1: QML Image: Failed to get image from provider: image://test2/exists2.png");

    QTest::ignoreMessage(QtWarningMsg, error.toUtf8());

    engine.removeImageProvider("test2");

    obj->setSource(QUrl("image://test2/exists2.png"));

    TRY_WAIT(obj->status() == QDeclarativeImage::Loading);
    TRY_WAIT(obj->status() == QDeclarativeImage::Error);

    delete obj;
}


QTEST_MAIN(tst_qdeclarativeimageprovider)

#include "tst_qdeclarativeimageprovider.moc"