/*
    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 "appmenu_interface.h"
#include "display.h"
#include "surface_interface.h"
#include "global_p.h"
#include "resource_p.h"
#include "logging.h"

#include <QtGlobal>

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

namespace KWaylandServer
{
class AppMenuManagerInterface::Private : public Global::Private
{
public:
    Private(AppMenuManagerInterface *q, Display *d);

    QVector<AppMenuInterface*> appmenus;
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);

    AppMenuManagerInterface *q;
    static const struct org_kde_kwin_appmenu_manager_interface s_interface;
    static const quint32 s_version;
};

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

#ifndef K_DOXYGEN
const struct org_kde_kwin_appmenu_manager_interface AppMenuManagerInterface::Private::s_interface = {
    createCallback
};
#endif

void AppMenuManagerInterface::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) << "ServerSideDecorationInterface requested for non existing SurfaceInterface";
        return;
    }
    auto appmenu = new AppMenuInterface(p->q, s, resource);
    appmenu->create(p->display->getConnection(client), wl_resource_get_version(resource), id);
    if (!appmenu->resource()) {
        wl_resource_post_no_memory(resource);
        delete appmenu;
        return;
    }
    p->appmenus.append(appmenu);
    QObject::connect(appmenu, &QObject::destroyed, p->q, [=]() {
        p->appmenus.removeOne(appmenu);
    });
    emit p->q->appMenuCreated(appmenu);
}

AppMenuManagerInterface::Private::Private(AppMenuManagerInterface *q, Display *d)
    : Global::Private(d, &org_kde_kwin_appmenu_manager_interface, s_version)
    , q(q)
{
}

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

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


    SurfaceInterface *surface;
    InterfaceAddress address;
private:
    static void setAddressCallback(wl_client *client, wl_resource *resource, const char * service_name, const char * object_path);

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

#ifndef K_DOXYGEN
const struct org_kde_kwin_appmenu_interface AppMenuInterface::Private::s_interface = {
    setAddressCallback,
    resourceDestroyedCallback
};
#endif

void AppMenuInterface::Private::setAddressCallback(wl_client *client, wl_resource *resource, const char * service_name, const char * object_path)
{
    Q_UNUSED(client);
    auto p = reinterpret_cast<Private*>(wl_resource_get_user_data(resource));
    Q_ASSERT(p);

    if (p->address.serviceName == QLatin1String(service_name) &&
        p->address.objectPath == QLatin1String(object_path)) {
        return;
    }
    p->address.serviceName = QString::fromLatin1(service_name);
    p->address.objectPath = QString::fromLatin1(object_path);
    emit p->q_func()->addressChanged(p->address);
}

AppMenuInterface::Private::Private(AppMenuInterface *q, AppMenuManagerInterface *c, SurfaceInterface *s, wl_resource *parentResource)
    : Resource::Private(q, c, parentResource, &org_kde_kwin_appmenu_interface, &s_interface),
    surface(s)
{
}

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

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

AppMenuManagerInterface::~AppMenuManagerInterface()
{
}

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

AppMenuInterface* AppMenuManagerInterface::appMenuForSurface(SurfaceInterface *surface)
{
    Q_D();
    for (AppMenuInterface* menu: d->appmenus) {
        if (menu->surface() == surface) {
            return menu;
        }
    }
    return nullptr;
}

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

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

AppMenuInterface::~AppMenuInterface()
{}

AppMenuInterface::InterfaceAddress AppMenuInterface::address() const {
    Q_D();
    return d->address;
}

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

}//namespace