/****************************************************************************
Copyright 2015  Marco Martin <notmart@gmail.com>

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) version 3, or any
later version accepted by the membership of KDE e.V. (or its
successor approved by the membership of KDE e.V.), which shall
act as a proxy defined in Section 6 of version 3 of the license.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library.  If not, see <http://www.gnu.org/licenses/>.
****************************************************************************/
#include "slide_interface.h"
#include "display.h"
#include "global_p.h"
#include "surface_interface.h"
#include "resource_p.h"
#include "surface_interface_p.h"

#include <wayland-server.h>
#include <wayland-slide-server-protocol.h>

namespace KWayland
{
namespace Server
{

class SlideManagerInterface::Private : public Global::Private
{
public:
    Private(SlideManagerInterface *q, Display *d);

private:
    void bind(wl_client *client, uint32_t version, uint32_t id) override;
    void createSlide(wl_client *client, wl_resource *resource, uint32_t id, wl_resource *surface);

    static void unbind(wl_resource *resource);
    static Private *cast(wl_resource *r) {
        return reinterpret_cast<Private*>(wl_resource_get_user_data(r));
    }

    static void createCallback(wl_client *client, wl_resource *resource, uint32_t id, wl_resource * surface);
    static void unsetCallback(wl_client *client, wl_resource *resource, wl_resource * surface);

    SlideManagerInterface *q;
    static const struct org_kde_kwin_slide_manager_interface s_interface;
    //initializing here doesn't link
    static const quint32 s_version;
};

const quint32 SlideManagerInterface::Private::s_version = 1;

#ifndef DOXYGEN_SHOULD_SKIP_THIS
const struct org_kde_kwin_slide_manager_interface SlideManagerInterface::Private::s_interface = {
    createCallback,
    unsetCallback
};
#endif

void SlideManagerInterface::Private::createCallback(wl_client *client, wl_resource *resource, uint32_t id, wl_resource * surface)
{
    cast(resource)->createSlide(client, resource, id, surface);
}

void SlideManagerInterface::Private::createSlide(wl_client *client, wl_resource *resource, uint32_t id, wl_resource * surface)
{
    SurfaceInterface *s = SurfaceInterface::get(surface);
    if (!s) {
        return;
    }

    SlideInterface *slide = new SlideInterface(q, resource);
    slide->create(display->getConnection(client), wl_resource_get_version(resource), id);
    if (!slide->resource()) {
        wl_resource_post_no_memory(resource);
        delete slide;
        return;
    }
    QObject::connect(s, &QObject::destroyed, slide,
        [slide] {
            if (slide->resource()) {
                wl_resource_destroy(slide->resource());
                delete slide;
            }
        }
    );
    s->d_func()->setSlide(QPointer<SlideInterface>(slide));
}

void SlideManagerInterface::Private::unsetCallback(wl_client *client, wl_resource *resource, wl_resource * surface)
{
    Q_UNUSED(client)
    Q_UNUSED(resource)
    Q_UNUSED(surface)
    // TODO: implement
}

SlideManagerInterface::Private::Private(SlideManagerInterface *q, Display *d)
    : Global::Private(d, &org_kde_kwin_slide_manager_interface, s_version)
    , q(q)
{
}

void SlideManagerInterface::Private::bind(wl_client *client, uint32_t version, uint32_t id)
{
    auto c = display->getConnection(client);
    wl_resource *resource = c->createResource(&org_kde_kwin_slide_manager_interface, qMin(version, s_version), id);
    if (!resource) {
        wl_client_post_no_memory(client);
        return;
    }
    wl_resource_set_implementation(resource, &s_interface, this, unbind);
    // TODO: should we track?
}

void SlideManagerInterface::Private::unbind(wl_resource *resource)
{
    Q_UNUSED(resource)
    // TODO: implement?
}

SlideManagerInterface::SlideManagerInterface(Display *display, QObject *parent)
    : Global(new Private(this, display), parent)
{
}

SlideManagerInterface::~SlideManagerInterface() = default;

class SlideInterface::Private : public Resource::Private
{
public:
    Private(SlideInterface *q, SlideManagerInterface *c, wl_resource *parentResource);
    ~Private();

    SlideInterface::Location pendingLocation;
    SlideInterface::Location currentLocation;
    uint32_t pendingOffset;
    uint32_t currentOffset;

private:
    static void commitCallback(wl_client *client, wl_resource *resource);
    static void setLocationCallback(wl_client *client, wl_resource *resource, uint32_t location);
    static void setOffsetCallback(wl_client *client, wl_resource *resource, int32_t offset);
    static void releaseCallback(wl_client *client, wl_resource *resource);

    SlideInterface *q_func() {
        return reinterpret_cast<SlideInterface *>(q);
    }

    static const struct org_kde_kwin_slide_interface s_interface;
};

#ifndef DOXYGEN_SHOULD_SKIP_THIS
const struct org_kde_kwin_slide_interface SlideInterface::Private::s_interface = {
    commitCallback,
    setLocationCallback,
    setOffsetCallback,
    releaseCallback
};
#endif

void SlideInterface::Private::commitCallback(wl_client *client, wl_resource *resource)
{
    Q_UNUSED(client)
    Private *p = cast<Private>(resource);
    p->currentLocation = p->pendingLocation;
    p->currentOffset = p->pendingOffset;
}

void SlideInterface::Private::setLocationCallback(wl_client *client, wl_resource *resource, uint32_t location)
{
    Q_UNUSED(client)
    Private *p = cast<Private>(resource);
    p->pendingLocation = (SlideInterface::Location)location;
}

void SlideInterface::Private::setOffsetCallback(wl_client *client, wl_resource *resource, int32_t offset)
{
    Q_UNUSED(client)
    Private *p = cast<Private>(resource);
    p->pendingOffset = offset;
}

void SlideInterface::Private::releaseCallback(wl_client *client, wl_resource *resource)
{
    Q_UNUSED(client)
    Q_UNUSED(resource)
    // TODO: implement
}

SlideInterface::Private::Private(SlideInterface *q, SlideManagerInterface *c, wl_resource *parentResource)
    : Resource::Private(q, c, parentResource, &org_kde_kwin_slide_interface, &s_interface)
{
}

SlideInterface::Private::~Private()
{
    if (resource) {
        wl_resource_destroy(resource);
        resource = nullptr;
    }
}

SlideInterface::SlideInterface(SlideManagerInterface *parent, wl_resource *parentResource)
    : Resource(new Private(this, parent, parentResource))
{
}

SlideInterface::~SlideInterface() = default;


SlideInterface::Location SlideInterface::location() const
{
    Q_D();
    return d->currentLocation;
}

qint32 SlideInterface::offset() const
{
    Q_D();
    return d->currentOffset;
}

SlideInterface::Private *SlideInterface::d_func() const
{
    return reinterpret_cast<Private*>(d.data());
}

}
}