/*
 * Copyright (C) 2024, KylinSoft Co., Ltd.

 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Library General Public License as
 * published by the Free Software Foundation; either version 2, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include "context.h"
#include <QSocketNotifier>
#include <libkywc.h>
#include <QtDebug>

class Context::Private
{
  public:
    Private(Context *context);
    ~Private();
    kywc_context *setup(uint32_t capability);

    kywc_context *k_context = nullptr;
    QSocketNotifier *notifier = nullptr;
    struct wl_display *display = NULL;
    uint32_t capabilities = 0;

  private:
    Context *ctx;
    static void createHandle(kywc_context *context, void *data);
    static void destroyHandle(kywc_context *context, void *data);
    static void newOutput(kywc_context *context, kywc_output *output, void *data);
    static void newToplevel(kywc_context *context, kywc_toplevel *toplevel, void *data);
    static void newWorkspace(kywc_context *context, kywc_workspace *workspace, void *data);
    static struct kywc_context_interface context_impl;
};

Context::Private::Private(Context *context) : ctx(context) {}

Context::Private::~Private() {}

void Context::Private::createHandle(kywc_context *context, void *data)
{
    Context::Private *p = (Context::Private *)data;
    emit p->ctx->created();
}

void Context::Private::destroyHandle(kywc_context *context, void *data)
{
    Context::Private *p = (Context::Private *)data;
    emit p->ctx->destroyed();
}

void Context::Private::newOutput(kywc_context *context, kywc_output *output, void *data)
{
    Context::Private *p = (Context::Private *)data;
    Output *o = new Output(p->ctx);
    o->setup(output);
    emit p->ctx->outputAdded(o);
}

void Context::Private::newToplevel(kywc_context *context, kywc_toplevel *toplevel, void *data)
{
    Context::Private *p = (Context::Private *)data;
    Toplevel *t = new Toplevel(p->ctx);
    t->setup(toplevel);
    emit p->ctx->toplevelAdded(t);
}

void Context::Private::newWorkspace(kywc_context *context, kywc_workspace *workspace, void *data)
{
    Context::Private *p = (Context::Private *)data;
    Workspace *w = new Workspace(p->ctx);
    w->setup(workspace);
    emit p->ctx->workespaceAdded(w);
}

struct kywc_context_interface Context::Private::context_impl = {
    createHandle, destroyHandle, newOutput, newToplevel, newWorkspace,
};


kywc_context *Context::Private::setup(uint32_t capabilities)
{
    if (!display)
        k_context = kywc_context_create(NULL, capabilities, &context_impl, this);
    else
        k_context = kywc_context_create_by_display(display, capabilities, &context_impl, this);
    return k_context;
}

Context::Context( struct wl_display *display, Capabilities caps, QObject *parent)
    : QObject{parent}
    , pri(new Private(this))
{
    pri->display = display;

    uint32_t capabilities = 0;
    if (caps & Context::Capability::Output)
        capabilities |= KYWC_CONTEXT_CAPABILITY_OUTPUT;
    if (caps & Context::Capability::Toplevel)
        capabilities |= KYWC_CONTEXT_CAPABILITY_TOPLEVEL;
    if (caps & Context::Capability::Workspace)
        capabilities |= KYWC_CONTEXT_CAPABILITY_WORKSPACE;
    if (caps & Context::Capability::Thumbnail)
        capabilities |= KYWC_CONTEXT_CAPABILITY_THUMBNAIL;
    pri->capabilities = capabilities;
}

Context::~Context() {
    qDebug()<<"~Context";
    kywc_context_destroy(pri->k_context);
}

void Context::start()
{
    kywc_context *ctx = NULL;

    if (!pri->display) {
        ctx = pri->setup(pri->capabilities);
        if (!ctx) {
            return;
        }
        pri->notifier = new QSocketNotifier(kywc_context_get_fd(ctx), QSocketNotifier::Read, this);
        connect(pri->notifier, &QSocketNotifier::activated, this, &Context::onContextReady);

        kywc_context_process(ctx);
    } else {
        ctx = pri->setup(pri->capabilities);
        if (!ctx) {
            return;
        }
    }
}

void Context::onContextReady()
{
    if (kywc_context_process(pri->k_context) < 0) {
        disconnect(pri->notifier, &QSocketNotifier::activated, this, &Context::onContextReady);
        emit aboutToTeardown();
        exit(-1);
    }
}

void Context::dispatch()
{
    kywc_context_dispatch(pri->k_context);
}

void Context::addWorkspace(uint32_t position)
{
    kywc_workspace_create(pri->k_context, NULL, position);
}

Workspace *Context::findWorkspace(QString uuid)
{
    QByteArray qByteArray = uuid.toUtf8();
    char *str = qByteArray.data();
    kywc_workspace *workspace = kywc_context_find_workspace(pri->k_context, str);
    return (Workspace *)kywc_workspace_get_user_data(workspace);
}

Output *Context::findOutput(QString uuid)
{
    QByteArray qByteArray = uuid.toUtf8();
    char *str = qByteArray.data();
    kywc_output *output = kywc_context_find_output(pri->k_context, str);
    return (Output *)kywc_output_get_user_data(output);
}

Toplevel *Context::findToplevel(QString uuid)
{
    QByteArray qByteArray = uuid.toUtf8();
    char *str = qByteArray.data();
    kywc_toplevel *toplevel = kywc_context_find_toplevel(pri->k_context, str);
    return (Toplevel *)kywc_toplevel_get_user_data(toplevel);
}

void Context::thumbnail_init(Thumbnail *thumbnail, Thumbnail::Type type, QString uuid, QString output_uuid)
{
    thumbnail->setup(pri->k_context, type, uuid, output_uuid);
}
