/*
    SPDX-FileCopyrightText: 2017 David Edmundson <kde@davidedmundson.co.uk>

    SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
*/
#include "server_decoration_palette_interface.h"
#include "display.h"
#include "global_p.h"
#include "logging.h"
#include "resource_p.h"
#include "surface_interface.h"

#include <QtGlobal>

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

namespace KWayland
{
namespace Server
{
class ServerSideDecorationPaletteManagerInterface::Private : public Global::Private
{
public:
    Private(ServerSideDecorationPaletteManagerInterface *q, Display *d);

    QVector<ServerSideDecorationPaletteInterface *> palettes;

private:
    void bind(wl_client *client, uint32_t version, uint32_t id) override;

    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);

    ServerSideDecorationPaletteManagerInterface *q;
    static const struct org_kde_kwin_server_decoration_palette_manager_interface s_interface;
    static const quint32 s_version;
};

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

#ifndef K_DOXYGEN
const struct org_kde_kwin_server_decoration_palette_manager_interface ServerSideDecorationPaletteManagerInterface::Private::s_interface = {createCallback};
#endif

void ServerSideDecorationPaletteManagerInterface::Private::createCallback(wl_client *client, wl_resource *resource, uint32_t id, wl_resource *surface)
{
    auto p = reinterpret_cast<Private *>(wl_resource_get_user_data(resource));
    Q_ASSERT(p);

    SurfaceInterface *s = SurfaceInterface::get(surface);
    if (!s) {
        // TODO: send error?
        qCWarning(KWAYLAND_SERVER) << "ServerSideDecorationPaletteInterface requested for non existing SurfaceInterface";
        return;
    }
    auto palette = new ServerSideDecorationPaletteInterface(p->q, s, resource);
    palette->create(p->display->getConnection(client), wl_resource_get_version(resource), id);
    if (!palette->resource()) {
        wl_resource_post_no_memory(resource);
        delete palette;
        return;
    }
    p->palettes.append(palette);
    QObject::connect(palette, &QObject::destroyed, p->q, [=]() {
        p->palettes.removeOne(palette);
    });
    Q_EMIT p->q->paletteCreated(palette);
}

ServerSideDecorationPaletteManagerInterface::Private::Private(ServerSideDecorationPaletteManagerInterface *q, Display *d)
    : Global::Private(d, &org_kde_kwin_server_decoration_palette_manager_interface, s_version)
    , q(q)
{
}

void ServerSideDecorationPaletteManagerInterface::Private::bind(wl_client *client, uint32_t version, uint32_t id)
{
    auto c = display->getConnection(client);
    wl_resource *resource = c->createResource(&org_kde_kwin_server_decoration_palette_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);
}

void ServerSideDecorationPaletteManagerInterface::Private::unbind(wl_resource *resource)
{
    Q_UNUSED(resource)
}

class ServerSideDecorationPaletteInterface::Private : public Resource::Private
{
public:
    Private(ServerSideDecorationPaletteInterface *q, ServerSideDecorationPaletteManagerInterface *c, SurfaceInterface *surface, wl_resource *parentResource);
    ~Private();

    SurfaceInterface *surface;
    QString palette;

private:
    static void setPaletteCallback(wl_client *client, wl_resource *resource, const char *palette);

    ServerSideDecorationPaletteInterface *q_func()
    {
        return reinterpret_cast<ServerSideDecorationPaletteInterface *>(q);
    }
    static ServerSideDecorationPaletteInterface *get(SurfaceInterface *s);
    static const struct org_kde_kwin_server_decoration_palette_interface s_interface;
};

#ifndef K_DOXYGEN
const struct org_kde_kwin_server_decoration_palette_interface ServerSideDecorationPaletteInterface::Private::s_interface = {setPaletteCallback,
                                                                                                                            resourceDestroyedCallback};
#endif

void ServerSideDecorationPaletteInterface::Private::setPaletteCallback(wl_client *client, wl_resource *resource, const char *palette)
{
    Q_UNUSED(client);
    auto p = reinterpret_cast<Private *>(wl_resource_get_user_data(resource));
    Q_ASSERT(p);

    if (p->palette == QLatin1String(palette)) {
        return;
    }
    p->palette = QString::fromUtf8(palette);
    Q_EMIT p->q_func()->paletteChanged(p->palette);
}

ServerSideDecorationPaletteInterface::Private::Private(ServerSideDecorationPaletteInterface *q,
                                                       ServerSideDecorationPaletteManagerInterface *c,
                                                       SurfaceInterface *s,
                                                       wl_resource *parentResource)
    : Resource::Private(q, c, parentResource, &org_kde_kwin_server_decoration_palette_interface, &s_interface)
    , surface(s)
{
}

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

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

ServerSideDecorationPaletteManagerInterface::~ServerSideDecorationPaletteManagerInterface()
{
}

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

ServerSideDecorationPaletteInterface *ServerSideDecorationPaletteManagerInterface::paletteForSurface(SurfaceInterface *surface)
{
    Q_D();
    for (ServerSideDecorationPaletteInterface *menu : d->palettes) {
        if (menu->surface() == surface) {
            return menu;
        }
    }
    return nullptr;
}

ServerSideDecorationPaletteInterface::ServerSideDecorationPaletteInterface(ServerSideDecorationPaletteManagerInterface *parent,
                                                                           SurfaceInterface *s,
                                                                           wl_resource *parentResource)
    : Resource(new Private(this, parent, s, parentResource))
{
}

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

ServerSideDecorationPaletteInterface::~ServerSideDecorationPaletteInterface()
{
}

QString ServerSideDecorationPaletteInterface::palette() const
{
    Q_D();
    return d->palette;
}

SurfaceInterface *ServerSideDecorationPaletteInterface::surface() const
{
    Q_D();
    return d->surface;
}

} // namespace
}
