#include <QLibrary>

#include <QtQml>

#include <QDebug>

#include <QPainter>

#include "hwengine.h"

#include "previewimageprovider.h"

extern "C" {

    RunEngine_t *RunEngine;

    registerIPCCallback_t *registerIPCCallback;

    ipcToEngine_t *ipcToEngine;

    flibInit_t *flibInit;

}

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

    QObject(parent),

    m_engine(engine)

{

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

    if(!hwlib.load())

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

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

    registerIPCCallback = (registerIPCCallback_t*) hwlib.resolve("registerIPCCallback");

    ipcToEngine = (ipcToEngine_t*) hwlib.resolve("ipcToEngine");

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

    registerIPCCallback(this, &engineMessageCallback);

}

HWEngine::~HWEngine()

{

}

void HWEngine::run()

{

    m_argsList.clear();

    m_argsList << "";

    m_argsList << "--internal";

    m_argsList << "--landpreview";

    m_args.resize(m_argsList.size());

    for(int i = m_argsList.size() - 1; i >=0; --i)

        m_args[i] = m_argsList[i].constData();

    RunEngine(m_args.size(), m_args.data());

    sendIPC("e$mapgen 0");

    sendIPC("!");

}

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::sendIPC(const QByteArray & b)

{

    quint8 len = b.size() > 255 ? 255 : b.size();

    qDebug() << "sendIPC: len = " << len;

    ipcToEngine(b.constData(), len);

}

void HWEngine::engineMessageCallback(void *context, const char * msg, quint32 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(QByteArray, b));

}

void HWEngine::engineMessageHandler(const QByteArray &msg)

{

}