/********************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 2014 Martin Gräßlin <mgraesslin@kde.org>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, 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 General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "decoratedclient.h"
#include "decorationrenderer.h"
#include "client.h"
#include "composite.h"
#include "cursor.h"
#include "options.h"
#include "scene.h"
#include "workspace.h"

#include <KDecoration2/DecoratedClient>
#include <KDecoration2/Decoration>

#include <QDebug>

namespace KWin
{
namespace Decoration
{

DecoratedClientImpl::DecoratedClientImpl(Client *client, KDecoration2::DecoratedClient *decoratedClient, KDecoration2::Decoration *decoration)
    : QObject()
    , DecoratedClientPrivate(decoratedClient, decoration)
    , m_client(client)
    , m_renderer(nullptr)
{
    createRenderer();
    connect(client, &Client::activeChanged, this,
        [decoratedClient, client]() {
            emit decoratedClient->activeChanged(client->isActive());
        }
    );
    connect(client, &Client::geometryChanged, this,
        [decoratedClient, client]() {
            emit decoratedClient->widthChanged(client->clientSize().width());
            emit decoratedClient->heightChanged(client->clientSize().height());
        }
    );
    connect(client, &Client::desktopChanged, this,
        [decoratedClient, client]() {
            emit decoratedClient->onAllDesktopsChanged(client->isOnAllDesktops());
        }
    );
    connect(client, &Client::captionChanged, this,
        [decoratedClient, client]() {
            emit decoratedClient->captionChanged(client->caption());
        }
    );
    connect(client, &Client::iconChanged, this,
        [decoratedClient, client]() {
            emit decoratedClient->iconChanged(client->icon());
        }
    );
    connect(client, &Client::shadeChanged, this,
        [decoratedClient, client]() {
            // TODO: geometry is wrong
            emit decoratedClient->shadedChanged(client->isShade());
        }
    );
    connect(client, &Client::keepAboveChanged, decoratedClient, &KDecoration2::DecoratedClient::keepAboveChanged);
    connect(client, &Client::keepBelowChanged, decoratedClient, &KDecoration2::DecoratedClient::keepBelowChanged);
    connect(Compositor::self(), &Compositor::compositingToggled, this,
        [this, decoration]() {
            delete m_renderer;
            m_renderer = nullptr;
            createRenderer();
            decoration->update();
        }
    );
    connect(client, &Client::quickTileModeChanged, decoratedClient,
        [this, decoratedClient]() {
            emit decoratedClient->borderingScreenEdgesChanged(borderingScreenEdges());
        }
    );
    connect(client, &Client::closeableChanged, decoratedClient, &KDecoration2::DecoratedClient::closeableChanged);
    connect(client, &Client::shadeableChanged, decoratedClient, &KDecoration2::DecoratedClient::shadeableChanged);
    connect(client, &Client::minimizeableChanged, decoratedClient, &KDecoration2::DecoratedClient::minimizableChanged);
    connect(client, &Client::maximizeableChanged, decoratedClient, &KDecoration2::DecoratedClient::maximizableChanged);
}

DecoratedClientImpl::~DecoratedClientImpl() = default;

#define DELEGATE(type, name) \
    type DecoratedClientImpl::name() const \
    { \
        return m_client->name(); \
    }

DELEGATE(QString, caption)
DELEGATE(bool, isActive)
DELEGATE(bool, isCloseable)
DELEGATE(bool, isMaximizable)
DELEGATE(bool, isMinimizable)
DELEGATE(bool, isModal)
DELEGATE(bool, isMovable)
DELEGATE(bool, isResizable)
DELEGATE(bool, isShadeable)
DELEGATE(bool, providesContextHelp)
DELEGATE(int, desktop)
DELEGATE(bool, isOnAllDesktops)
DELEGATE(QPalette, palette)
DELEGATE(QIcon, icon)

#undef DELEGATE

#define DELEGATE(type, name, clientName) \
    type DecoratedClientImpl::name() const \
    { \
        return m_client->clientName(); \
    }

DELEGATE(bool, isKeepAbove, keepAbove)
DELEGATE(bool, isKeepBelow, keepBelow)
DELEGATE(bool, isShaded, isShade)
DELEGATE(WId, windowId, window)
DELEGATE(WId, decorationId, frameId)

#undef DELEGATE

#define DELEGATE(name, op) \
    void DecoratedClientImpl::name() \
    { \
        Workspace::self()->performWindowOperation(m_client, KDecorationDefines::op); \
    }

DELEGATE(requestToggleShade, ShadeOp)
DELEGATE(requestToggleOnAllDesktops, OnAllDesktopsOp)
DELEGATE(requestToggleKeepAbove, KeepAboveOp)
DELEGATE(requestToggleKeepBelow, KeepBelowOp)

#undef DELEGATE

#define DELEGATE(name, clientName) \
    void DecoratedClientImpl::name() \
    { \
        m_client->clientName(); \
    }

DELEGATE(requestContextHelp, showContextHelp)
DELEGATE(requestMinimize, minimize)
DELEGATE(requestClose, closeWindow)

#undef DELEGATE

void DecoratedClientImpl::requestShowWindowMenu()
{
    // TODO: add rect to requestShowWindowMenu
    Workspace::self()->showWindowMenu(QRect(Cursor::pos(), Cursor::pos()), m_client);
}

void DecoratedClientImpl::requestMaximize(Qt::MouseButtons buttons)
{
    Workspace::self()->performWindowOperation(m_client, options->operationMaxButtonClick(buttons));
}

int DecoratedClientImpl::width() const
{
    return m_client->clientSize().width();
}

int DecoratedClientImpl::height() const
{
    return m_client->clientSize().height();
}

bool DecoratedClientImpl::isMaximizedVertically() const
{
    return m_client->maximizeMode() & KDecorationDefines::MaximizeVertical;
}

bool DecoratedClientImpl::isMaximized() const
{
    return isMaximizedHorizontally() && isMaximizedVertically();
}

bool DecoratedClientImpl::isMaximizedHorizontally() const
{
    return m_client->maximizeMode() & KDecorationDefines::MaximizeHorizontal;
}

Qt::Edges DecoratedClientImpl::borderingScreenEdges() const
{
    Qt::Edges edges;
    const KDecorationDefines::QuickTileMode mode = m_client->quickTileMode();
    if (mode.testFlag(KDecorationDefines::QuickTileLeft)) {
        edges |= Qt::LeftEdge;
        if (!mode.testFlag(KDecorationDefines::QuickTileTop) && !mode.testFlag(KDecorationDefines::QuickTileBottom)) {
            // using complete side
            edges |= Qt::TopEdge | Qt::BottomEdge;
        }
    }
    if (mode.testFlag(KDecorationDefines::QuickTileTop)) {
        edges |= Qt::TopEdge;
    }
    if (mode.testFlag(KDecorationDefines::QuickTileRight)) {
        edges |= Qt::RightEdge;
        if (!mode.testFlag(KDecorationDefines::QuickTileTop) && !mode.testFlag(KDecorationDefines::QuickTileBottom)) {
            // using complete side
            edges |= Qt::TopEdge | Qt::BottomEdge;
        }
    }
    if (mode.testFlag(KDecorationDefines::QuickTileBottom)) {
        edges |= Qt::BottomEdge;
    }
    return edges;
}

void DecoratedClientImpl::createRenderer()
{
    if (Compositor::self()->hasScene()) {
        m_renderer = Compositor::self()->scene()->createDecorationRenderer(this);
    } else {
        m_renderer = new X11Renderer(this);
    }
}

void DecoratedClientImpl::destroyRenderer()
{
    delete m_renderer;
    m_renderer = nullptr;
}

}
}