/****************************************************************************
**
** Copyright (C) 2016 Jochen Becher
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
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** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/

#pragma once

#include <QGraphicsItem>
#include "qmt/diagram_scene/capabilities/moveable.h"
#include "qmt/diagram_scene/capabilities/selectable.h"
#include "qmt/diagram_scene/capabilities/windable.h"

QT_BEGIN_NAMESPACE
class QGraphicsSimpleTextItem;
class QPainterPath;
QT_END_NAMESPACE

namespace qmt {

class Uid;
class DRelation;
class DiagramSceneModel;
class ArrowItem;
class StereotypesItem;
class PathSelectionItem;
class Style;

class RelationItem :
        public QGraphicsItem,
        public IMoveable,
        public ISelectable,
        public IWindable
{
    class ArrowConfigurator;

public:
    RelationItem(DRelation *relation, DiagramSceneModel *diagramSceneModel,
                 QGraphicsItem *parent = nullptr);
    ~RelationItem() override;

    DRelation *relation() const { return m_relation; }

    QRectF boundingRect() const override;
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
    QPainterPath shape() const override;

    void moveDelta(const QPointF &delta) override;
    void alignItemPositionToRaster(double rasterWidth, double rasterHeight) override;

    bool isSecondarySelected() const override;
    void setSecondarySelected(bool secondarySelected) override;
    bool isFocusSelected() const override;
    void setFocusSelected(bool focusSelected) override;
    QRectF getSecondarySelectionBoundary() override;
    void setBoundarySelected(const QRectF &boundary, bool secondary) override;

    QPointF grabHandle(int index) override;
    void insertHandle(int beforeIndex, const QPointF &pos, double rasterWidth, double rasterHeight) override;
    void deleteHandle(int index) override;
    void setHandlePos(int index, const QPointF &pos) override;
    void dropHandle(int index, double rasterWidth, double rasterHeight) override;

    virtual void update();

protected:
    virtual void update(const Style *style);

    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;

private:
    const Style *adaptedStyle();
    QPointF calcEndPoint(const Uid &end, const Uid &otherEnd, int nearestIntermediatePointIndex);
    QPointF calcEndPoint(const Uid &end, const QPointF &otherEndPos,
                         int nearestIntermediatePointIndex);

    DRelation *m_relation = nullptr;

protected:
    DiagramSceneModel *m_diagramSceneModel = nullptr;
    bool m_isSecondarySelected = false;
    bool m_isFocusSelected = false;
    ArrowItem *m_arrow = nullptr;
    QGraphicsSimpleTextItem *m_name = nullptr;
    StereotypesItem *m_stereotypes = nullptr;
    PathSelectionItem *m_selectionHandles = nullptr;
    static bool m_grabbedEndA;
    static bool m_grabbedEndB;
    static QPointF m_grabbedEndPos;
};

} // namespace qmt
