#include <QLibrary>

#include <QtQml>

#include <QDebug>

#include <QPainter>

#include <QUuid>

#include "hwengine.h"

#include "previewimageprovider.h"

extern "C" {

    RunEngine_t *flibRunEngine;

    registerGUIMessagesCallback_t *flibRegisterGUIMessagesCallback;

    setSeed_t *flibSetSeed;

    getSeed_t *flibGetSeed;

    getPreview_t *flibGetPreview;

    flibInit_t *flibInit;

    flibFree_t *flibFree;

}

Q_DECLARE_METATYPE(MessageType);

HWEngine::HWEngine(QQmlEngine *engine, QObject *parent) :

    QObject(parent),

    m_engine(engine)

{

    qRegisterMetaType<MessageType>("MessageType");

    QLibrary hwlib("./libhwengine.so");

    if(!hwlib.load())

        qWarning() << "Engine library not found" << hwlib.errorString();

    flibRunEngine = (RunEngine_t*) hwlib.resolve("RunEngine");

    flibRegisterGUIMessagesCallback = (registerGUIMessagesCallback_t*) hwlib.resolve("registerGUIMessagesCallback");

    flibSetSeed = (setSeed_t*) hwlib.resolve("setSeed");

    flibGetSeed = (getSeed_t*) hwlib.resolve("getSeed");

    flibGetPreview = (getPreview_t*) hwlib.resolve("getPreview");

    flibInit = (flibInit_t*) hwlib.resolve("flibInit");

    flibFree = (flibFree_t*) hwlib.resolve("flibFree");

    flibRegisterGUIMessagesCallback(this, &guiMessagesCallback);

}

HWEngine::~HWEngine()

{

    flibFree();

}

void HWEngine::getPreview()

{

    flibSetSeed(QUuid::createUuid().toString().toLatin1());

    flibGetPreview();

}

static QObject *hwengine_singletontype_provider(QQmlEngine *engine, QJSEngine *scriptEngine)

{

    Q_UNUSED(scriptEngine)

    HWEngine *hwengine = new HWEngine(engine);

    return hwengine;

}

void HWEngine::exposeToQML()

{

    qDebug("HWEngine::exposeToQML");

    qmlRegisterSingletonType<HWEngine>("Hedgewars.Engine", 1, 0, "HWEngine", hwengine_singletontype_provider);

}

void HWEngine::guiMessagesCallback(void *context, MessageType mt, const char * msg, uint32_t len)

{

    HWEngine * obj = (HWEngine *)context;

    QByteArray b = QByteArray::fromRawData(msg, len);

    qDebug() << "FLIPC in" << b.size() << b;

    QMetaObject::invokeMethod(obj, "engineMessageHandler", Qt::QueuedConnection, Q_ARG(MessageType, mt), Q_ARG(QByteArray, b));

}

void HWEngine::engineMessageHandler(MessageType mt, const QByteArray &msg)

{

    switch(mt)

    {

    case MSG_PREVIEW:

        PreviewImageProvider * preview = (PreviewImageProvider *)m_engine->imageProvider(QLatin1String("preview"));

        preview->setPixmap(msg);

        emit previewImageChanged();

        break;

    }

}

QString HWEngine::currentSeed()

{

    return QString::fromLatin1(flibGetSeed());

}