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#include "qopenkodewindow.h"
#include "qopenkodeintegration.h"
#include "../eglconvenience/qeglplatformcontext.h"
#include "../eglconvenience/qeglconvenience.h"

#include <KD/kd.h>
#include <KD/NV_display.h>

#include <EGL/egl.h>

#include <QtGui/qwidget.h>
#include <QtGui/private/qwidget_p.h>
#include <QtGui/private/qapplication_p.h>

#include <QtCore/qvector.h>
#include <QtCore/QDebug>



QOpenKODEWindow::QOpenKODEWindow(QWidget *tlw)
    : QPlatformWindow(tlw)
{

    if (tlw->platformWindowFormat().windowApi() == QPlatformWindowFormat::OpenVG) {
        m_eglApi = EGL_OPENVG_API;
    } else {
        m_eglContextAttrs.append(EGL_CONTEXT_CLIENT_VERSION);
        m_eglContextAttrs.append(2);

        m_eglApi = EGL_OPENGL_ES_API;
    }
    eglBindAPI(m_eglApi);

    m_eglContextAttrs.append(EGL_NONE);
    m_eglWindowAttrs.append(EGL_NONE);

    QList<QPlatformScreen *> screens = QApplicationPrivate::platformIntegration()->screens();
    //XXXX: jl figure out how to pick the correct screen.
//    Q_ASSERT(screens.size() > tlw->d_func()->screenNumber);
//    QOpenKODEScreen *screen = qobject_cast<QOpenKODEScreen *>(screens.at(tlw->d_func()->screenNumber));
    QOpenKODEScreen *screen = qobject_cast<QOpenKODEScreen *>(screens.at(0));
    if (!screen) {
        qErrnoWarning("Could not make QOpenKODEWindow without a screen");
    }

    QPlatformWindowFormat format = tlw->platformWindowFormat();
    format.setRedBufferSize(5);
    format.setGreenBufferSize(6);
    format.setBlueBufferSize(5);
    tlw->setPlatformWindowFormat(format);

    m_eglConfig = q_configFromQPlatformWindowFormat(screen->eglDisplay(),tlw->platformWindowFormat());

    m_kdWindow = kdCreateWindow(screen->eglDisplay(),
                              m_eglConfig,
                              KD_NULL);
    if (!m_kdWindow) {
        qErrnoWarning(kdGetError(), "Error creating native window");
        return;
    }

    const KDint windowSize[2]  = { tlw->width(), tlw->height()-1 };
    if (kdSetWindowPropertyiv(m_kdWindow, KD_WINDOWPROPERTY_SIZE, windowSize)) {
        qErrnoWarning(kdGetError(), "Could not set native window size");
        return;
    }

    KDboolean visibillity(false);
    if (kdSetWindowPropertybv(m_kdWindow, KD_WINDOWPROPERTY_VISIBILITY, &visibillity)) {
        qErrnoWarning(kdGetError(), "Could not set visibillity to false");
    }

    const KDint windowPos[2] = { tlw->x(), tlw->y() };
    if (kdSetWindowPropertyiv(m_kdWindow, KD_WINDOWPROPERTY_DESKTOP_OFFSET_NV, windowPos)) {
        qErrnoWarning(kdGetError(), "Could not set native window position");
        return;
    }

    if (kdRealizeWindow(m_kdWindow, &m_eglWindow)) {
        qErrnoWarning(kdGetError(), "Could not realize native window");
        return;
    }

    EGLSurface surface = eglCreateWindowSurface(screen->eglDisplay(),m_eglConfig,m_eglWindow,m_eglWindowAttrs.constData());

    m_platformGlContext = new QEGLPlatformContext(screen->eglDisplay(), m_eglConfig,
                                                  m_eglContextAttrs.data(), surface, m_eglApi);
}

QOpenKODEWindow::~QOpenKODEWindow()
{
    qDebug() << "destroying window" << m_kdWindow;
    delete m_platformGlContext;
    kdDestroyWindow(m_kdWindow);
}
void QOpenKODEWindow::setGeometry(const QRect &rect)
{
    const QRect geo = geometry();
    if (geo.size() != rect.size()) {
        const KDint windowSize[2]  = { rect.width(), rect.height() -1 };
        if (kdSetWindowPropertyiv(m_kdWindow, KD_WINDOWPROPERTY_SIZE, windowSize)) {
            qErrnoWarning(kdGetError(), "Could not set native window size");
            //return;
        }
    }

    if (geo.topLeft() != rect.topLeft()) {
        const KDint windowPos[2] = { rect.x(), rect.y() };
        if (kdSetWindowPropertyiv(m_kdWindow, KD_WINDOWPROPERTY_DESKTOP_OFFSET_NV, windowPos)) {
            qErrnoWarning(kdGetError(), "Could not set native window position");
            //return;
        }
    }

    //need to recreate context
    delete m_platformGlContext;

    QList<QPlatformScreen *> screens = QApplicationPrivate::platformIntegration()->screens();
    QOpenKODEScreen *screen = qobject_cast<QOpenKODEScreen *>(screens.at(0));
    EGLSurface surface = eglCreateWindowSurface(screen->eglDisplay(),m_eglConfig,m_eglWindow,m_eglWindowAttrs.constData());
    m_platformGlContext = new QEGLPlatformContext(screen->eglDisplay(),m_eglConfig,
                                                  m_eglContextAttrs.data(),surface,m_eglApi);
}

void QOpenKODEWindow::setVisible(bool visible)
{
    KDboolean visibillity(visible);
    if (kdSetWindowPropertybv(m_kdWindow, KD_WINDOWPROPERTY_VISIBILITY, &visibillity)) {
        qErrnoWarning(kdGetError(), "Could not set visibillity to false");
    }
}

QPlatformGLContext *QOpenKODEWindow::glContext()
{
    return m_platformGlContext;
}