#include "HsQMLManager.h"
#include "HsQMLEngine.h"
#include "HsQMLObject.h"
#include "HsQMLWindow.h"

HsQMLScriptHack::HsQMLScriptHack(QDeclarativeEngine* declEng)
    : mEngine(NULL)
{
    QDeclarativeEngine::setObjectOwnership(
        this, QDeclarativeEngine::CppOwnership);
    QDeclarativeExpression expr(declEng->rootContext(), this, "hack(self());");
    expr.evaluate();
    Q_ASSERT(!expr.hasError());
}

QObject* HsQMLScriptHack::self()
{
    return this;
}

void HsQMLScriptHack::hack(QScriptValue value)
{
    mEngine = value.engine();
}

QScriptEngine* HsQMLScriptHack::scriptEngine() const
{
    return mEngine;
}

HsQMLEngine::HsQMLEngine(const HsQMLEngineConfig& config)
    : mScriptEngine(HsQMLScriptHack(&mDeclEngine).scriptEngine())
    , mStopCb(config.stopCb)
{
    // Obtain, re-parent, and set QML global object
    if (config.contextObject) {
        mContextObj.reset(config.contextObject->object(this));
        mDeclEngine.rootContext()->setContextObject(mContextObj.data());
    }

    // Create window
    HsQMLWindow* win = new HsQMLWindow(this);
    win->setParent(this);
    win->setSource(config.initialURL);
    win->setVisible(config.showWindow);
    if (config.setWindowTitle) {
        win->setTitle(config.windowTitle);
    }
}

HsQMLEngine::~HsQMLEngine()
{
    // Call stop callback
    mStopCb();
    gManager->freeFun(reinterpret_cast<HsFunPtr>(mStopCb));
}

void HsQMLEngine::childEvent(QChildEvent* ev)
{
    if (ev->removed() && children().size() == 0) {
        deleteLater();
    }
}

QDeclarativeEngine* HsQMLEngine::declEngine()
{
    return &mDeclEngine;
}

QScriptEngine* HsQMLEngine::scriptEngine()
{
    return mScriptEngine;
}

extern "C" void hsqml_create_engine(
    HsQMLObjectHandle* contextObject,
    HsQMLUrlHandle* initialURL,
    int showWindow,
    int setWindowTitle,
    HsQMLStringHandle* windowTitle,
    HsQMLTrivialCb stopCb)
{
    HsQMLEngineConfig config;
    config.contextObject = reinterpret_cast<HsQMLObjectProxy*>(contextObject);
    config.initialURL = *reinterpret_cast<QUrl*>(initialURL);
    config.showWindow = static_cast<bool>(showWindow);
    if (setWindowTitle) {
        config.setWindowTitle = true;
        config.windowTitle = *reinterpret_cast<QString*>(windowTitle);
    }
    config.stopCb = stopCb;

    Q_ASSERT (gManager);
    gManager->createEngine(config);
}