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#include "qwaylandwindow.h"

#include "qwaylandbuffer.h"
#include "qwaylanddisplay.h"
#include "qwaylandinputdevice.h"
#include "qwaylandscreen.h"

#include <QtGui/QWindow>
#include <QtGui/QWindowSystemInterface>

#include <QDebug>

QWaylandWindow::QWaylandWindow(QWindow *window)
    : QPlatformWindow(window)
    , mDisplay(QWaylandScreen::waylandScreenFromWindow(window)->display())
    , mBuffer(0)
    , mWaitingForFrameSync(false)
{
    static WId id = 1;
    mWindowId = id++;

    mSurface = mDisplay->createSurface(this);
}

QWaylandWindow::~QWaylandWindow()
{
    if (mSurface)
        wl_surface_destroy(mSurface);

    QList<QWaylandInputDevice *> inputDevices = mDisplay->inputDevices();
    for (int i = 0; i < inputDevices.size(); ++i)
        inputDevices.at(i)->handleWindowDestroyed(this);
}

WId QWaylandWindow::winId() const
{
    return mWindowId;
}

void QWaylandWindow::setParent(const QPlatformWindow *parent)
{
    Q_UNUSED(parent);
    qWarning("Sub window is not supported");
}

void QWaylandWindow::setVisible(bool visible)
{
    if (!mSurface && visible) {
        mSurface = mDisplay->createSurface(this);
        newSurfaceCreated();
    }

    if (visible) {
        wl_surface_map_toplevel(mSurface);
    } else {
        wl_surface_destroy(mSurface);
        mSurface = NULL;
    }
}

void QWaylandWindow::configure(uint32_t time, uint32_t edges,
                               int32_t x, int32_t y,
                               int32_t width, int32_t height)
{
    Q_UNUSED(time);
    Q_UNUSED(edges);
    QRect geometry = QRect(x, y, width, height);

    setGeometry(geometry);

    QWindowSystemInterface::handleGeometryChange(window(), geometry);
}

void QWaylandWindow::attach(QWaylandBuffer *buffer)
{
    mBuffer = buffer;
    if (mSurface) {
        wl_surface_attach(mSurface, buffer->buffer(),0,0);
    }
}


void QWaylandWindow::damage(const QRegion &region)
{
    //We have to do sync stuff before calling damage, or we might
    //get a frame callback before we get the timestamp
    mDisplay->frameCallback(QWaylandWindow::frameCallback, mSurface, this);
    mWaitingForFrameSync = true;

    QVector<QRect> rects = region.rects();
    for (int i = 0; i < rects.size(); i++) {
        const QRect rect = rects.at(i);
        wl_surface_damage(mSurface,
                          rect.x(), rect.y(), rect.width(), rect.height());
    }
}

void QWaylandWindow::newSurfaceCreated()
{
    if (mBuffer) {
        wl_surface_attach(mSurface,mBuffer->buffer(),0,0);
    }
}

void QWaylandWindow::frameCallback(struct wl_surface *surface, void *data, uint32_t time)
{
    Q_UNUSED(time);
    Q_UNUSED(surface);
    QWaylandWindow *self = static_cast<QWaylandWindow*>(data);
    self->mWaitingForFrameSync = false;
}

void QWaylandWindow::waitForFrameSync()
{
    mDisplay->flushRequests();
    while (mWaitingForFrameSync)
        mDisplay->blockingReadEvents();
}