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#include <QMetaEnum>
#include <QMetaMethod>
#include <QMetaObject>
#include <QMetaProperty>
#include <QMetaType>
#include <QtTest/QtTest>
#include <private/qquickwebengineview_p.h>
#include <private/qquickwebengineloadrequest_p.h>
// FIXME: Implement!
// #include <qquickwebenginenavigationrequest_p.h>

class tst_publicapi : public QObject {
    Q_OBJECT
private Q_SLOTS:
    void publicAPI();
};

static QList<const QMetaObject *> typesToCheck = QList<const QMetaObject *>()
    << &QQuickWebEngineView::staticMetaObject
    << &QQuickWebEngineLoadRequest::staticMetaObject
    // << &QQuickWebEngineNavigationRequest::staticMetaObject
    ;

static QStringList expectedAPI = QStringList()
    << "QQuickWebEngineView.AcceptRequest --> NavigationRequestAction"
    << "QQuickWebEngineView.IgnoreRequest --> NavigationRequestAction"
    << "QQuickWebEngineView.LoadStartedStatus --> LoadStatus"
    << "QQuickWebEngineView.LoadStoppedStatus --> LoadStatus"
    << "QQuickWebEngineView.LoadSucceededStatus --> LoadStatus"
    << "QQuickWebEngineView.LoadFailedStatus --> LoadStatus"
    << "QQuickWebEngineView.NoErrorDomain --> ErrorDomain"
    << "QQuickWebEngineView.InternalErrorDomain --> ErrorDomain"
    << "QQuickWebEngineView.ConnectionErrorDomain --> ErrorDomain"
    << "QQuickWebEngineView.CertificateErrorDomain --> ErrorDomain"
    << "QQuickWebEngineView.HttpErrorDomain --> ErrorDomain"
    << "QQuickWebEngineView.FtpErrorDomain --> ErrorDomain"
    << "QQuickWebEngineView.DnsErrorDomain --> ErrorDomain"
    << "QQuickWebEngineView.LinkClickedNavigation --> NavigationType"
    << "QQuickWebEngineView.FormSubmittedNavigation --> NavigationType"
    << "QQuickWebEngineView.BackForwardNavigation --> NavigationType"
    << "QQuickWebEngineView.ReloadNavigation --> NavigationType"
    << "QQuickWebEngineView.FormResubmittedNavigation --> NavigationType"
    << "QQuickWebEngineView.OtherNavigation --> NavigationType"
    << "QQuickWebEngineView.title --> QString"
    << "QQuickWebEngineView.url --> QUrl"
    << "QQuickWebEngineView.icon --> QUrl"
    << "QQuickWebEngineView.canGoBack --> bool"
    << "QQuickWebEngineView.canGoForward --> bool"
    << "QQuickWebEngineView.inspectable --> bool"
    << "QQuickWebEngineView.loading --> bool"
    << "QQuickWebEngineView.loadProgress --> int"
    << "QQuickWebEngineView.titleChanged() --> void"
    << "QQuickWebEngineView.navigationHistoryChanged() --> void"
    << "QQuickWebEngineView.loadingChanged(QQuickWebEngineLoadRequest*) --> void"
    << "QQuickWebEngineView.loadProgressChanged() --> void"
    << "QQuickWebEngineView.javaScriptConsoleMessage(int,QString,int,QString) --> void"
    << "QQuickWebEngineView.urlChanged() --> void"
    << "QQuickWebEngineView.iconChanged() --> void"
    << "QQuickWebEngineView.linkHovered(QUrl) --> void"
    << "QQuickWebEngineView.navigationRequested(QQuickWebEngineNavigationRequest*) --> void"
    << "QQuickWebEngineView.loadHtml(QString,QUrl,QUrl) --> void"
    << "QQuickWebEngineView.loadHtml(QString,QUrl) --> void"
    << "QQuickWebEngineView.loadHtml(QString) --> void"
    << "QQuickWebEngineView.goBack() --> void"
    << "QQuickWebEngineView.goForward() --> void"
    << "QQuickWebEngineView.stop() --> void"
    << "QQuickWebEngineView.reload() --> void"
    << "QQuickWebEngineLoadRequest.url --> QUrl"
    << "QQuickWebEngineLoadRequest.status --> QQuickWebEngineView::LoadStatus"
    << "QQuickWebEngineLoadRequest.errorString --> QString"
    << "QQuickWebEngineLoadRequest.errorDomain --> QQuickWebEngineView::ErrorDomain"
    << "QQuickWebEngineLoadRequest.errorCode --> int"
    << "QQuickWebEngineNavigationRequest.url --> QUrl"
    << "QQuickWebEngineNavigationRequest.mouseButton --> int"
    << "QQuickWebEngineNavigationRequest.keyboardModifiers --> int"
    << "QQuickWebEngineNavigationRequest.action --> QQuickWebEngineView::NavigationRequestAction"
    << "QQuickWebEngineNavigationRequest.navigationType --> QQuickWebEngineView::NavigationType"
    << "QQuickWebEngineNavigationRequest.actionChanged() --> void"
    ;

static bool isCheckedEnum(const QByteArray &typeName)
{
    QList<QByteArray> tokens = typeName.split(':');
    if (tokens.size() == 3) {
        QByteArray &enumClass = tokens[0];
        QByteArray &enumName = tokens[2];
        foreach (const QMetaObject *mo, typesToCheck) {
            if (mo->className() != enumClass)
                continue;
            for (int i = mo->enumeratorOffset(); i < mo->enumeratorCount(); ++i)
                if (mo->enumerator(i).name() == enumName)
                    return true;
        }
    }
    return false;
}

static bool isCheckedClass(const QByteArray &typeName)
{
    foreach (const QMetaObject *mo, typesToCheck) {
        QByteArray moTypeName(mo->className());
        if (moTypeName == typeName || moTypeName + "*" == typeName)
            return true;
    }
    return false;
}

static void checkKnownType(const QByteArray &typeName)
{
    if ((typeName != "void" && !QMetaType::type(typeName)) || QMetaType::type(typeName) >= QMetaType::User) {
        bool knownEnum = isCheckedEnum(typeName);
        bool knownClass = isCheckedClass(typeName);
        QVERIFY2(knownEnum || knownClass, qPrintable(QString("The API uses an unknown type [%1], you might have to add it to the typesToCheck list.").arg(typeName.constData())));
    }
}

static void gatherAPI(const QString &prefix, const QMetaEnum &metaEnum, QStringList *output)
{
    for (int i = 0; i < metaEnum.keyCount(); ++i)
        *output << QString::fromLatin1("%1%2 --> %3").arg(prefix).arg(metaEnum.key(i)).arg(metaEnum.name());
}

static void gatherAPI(const QString &prefix, const QMetaProperty &property, QStringList *output)
{
    *output << QString::fromLatin1("%1%2 --> %3").arg(prefix).arg(property.name()).arg(property.typeName());
    checkKnownType(property.typeName());
}

static void gatherAPI(const QString &prefix, const QMetaMethod &method, QStringList *output)
{
    if (method.access() != QMetaMethod::Private) {
        const char *methodTypeName = !!strlen(method.typeName()) ? method.typeName() : "void";
        *output << QString::fromLatin1("%1%2 --> %3").arg(prefix).arg(QString::fromLatin1(method.methodSignature())).arg(QString::fromLatin1(methodTypeName));

        checkKnownType(methodTypeName);
        foreach (QByteArray paramType, method.parameterTypes())
            checkKnownType(paramType);
    }
}

static void gatherAPI(const QString &prefix, const QMetaObject *meta, QStringList *output)
{
    // *Offset points us only at the leaf class members, we don't have inheritance in our API yet anyway.
    for (int i = meta->enumeratorOffset(); i < meta->enumeratorCount(); ++i)
        gatherAPI(prefix, meta->enumerator(i), output);
    for (int i = meta->propertyOffset(); i < meta->propertyCount(); ++i)
        gatherAPI(prefix, meta->property(i), output);
    for (int i = meta->methodOffset(); i < meta->methodCount(); ++i)
        gatherAPI(prefix, meta->method(i), output);
}

void tst_publicapi::publicAPI()
{
    QStringList actualAPI;
    foreach (const QMetaObject *meta, typesToCheck)
        gatherAPI(QString::fromLatin1(meta->className()) + ".", meta, &actualAPI);

    // Uncomment to print the actual API.
    // foreach (QString actual, actualAPI)
    //     printf("    << \"%s\"\n", qPrintable(actual));

    // Make sure that nothing slips in the public API unintentionally.
    foreach (QString actual, actualAPI) {
        if (!expectedAPI.contains(actual))
            QEXPECT_FAIL("", qPrintable("Expected list is not up-to-date: " + actual), Continue);
        QVERIFY2(expectedAPI.contains(actual), qPrintable(actual));
    }
    // Make sure that the expected list is up-to-date with intentionally added APIs.
    foreach (QString expected, expectedAPI) {
        if (!actualAPI.contains(expected))
            QEXPECT_FAIL("", qPrintable("Not implemented: " + expected), Continue);
        QVERIFY2(actualAPI.contains(expected), qPrintable(expected));
    }
}

QTEST_MAIN(tst_publicapi)

#include "tst_publicapi.moc"