/***************************************************************************
 *   Copyright (C) 2005-2018 by the Quassel Project                        *
 *   devel@quassel-irc.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) version 3.                                           *
 *                                                                         *
 *   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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 ***************************************************************************/

#ifndef CHATLINE_H_
#define CHATLINE_H_

#include <QGraphicsItem>

#include "chatlinemodel.h"
#include "chatitem.h"
#include "chatscene.h"

class ChatLine : public QGraphicsItem
{
public:
    ChatLine(int row, QAbstractItemModel *model,
        const qreal &width,
        const qreal &timestampWidth, const qreal &senderWidth, const qreal &contentsWidth,
        const QPointF &senderPos, const QPointF &contentsPos,
        QGraphicsItem *parent = 0);

    virtual ~ChatLine();

    virtual inline QRectF boundingRect() const { return QRectF(0, 0, _width, _height); }

    inline QModelIndex index() const { return model()->index(row(), 0); }
    inline MsgId msgId() const { return index().data(MessageModel::MsgIdRole).value<MsgId>(); }
    inline Message::Type msgType() const { return (Message::Type)index().data(MessageModel::TypeRole).toInt(); }

    inline int row() const { return _row; }
    inline void setRow(int row) { _row = row; }

    inline const QAbstractItemModel *model() const { return _model; }
    inline ChatScene *chatScene() const { return qobject_cast<ChatScene *>(scene()); }
    inline ChatView *chatView() const { return chatScene() ? chatScene()->chatView() : 0; }

    inline qreal width() const { return _width; }
    inline qreal height() const { return _height; }

    ChatItem *item(ChatLineModel::ColumnType);
    ChatItem *itemAt(const QPointF &pos);
    inline ChatItem *timestampItem() { return &_timestampItem; }
    inline ChatItem *senderItem() { return &_senderItem; }
    inline ContentsChatItem *contentsItem() { return &_contentsItem; }

    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
    enum { Type = ChatScene::ChatLineType };
    virtual inline int type() const { return Type; }

    // pos is relative to the parent ChatLine
    void setFirstColumn(const qreal &timestampWidth, const qreal &senderWidth, const QPointF &senderPos);
    // setSecondColumn and setGeometryByWidth both also relocate the chatline.
    // the _bottom_ position is passed via linePos. linePos is updated to the top of the chatLine.
    void setSecondColumn(const qreal &senderWidth, const qreal &contentsWidth, const QPointF &contentsPos, qreal &linePos);
    void setGeometryByWidth(const qreal &width, const qreal &contentsWidth, qreal &linePos);

    void setSelected(bool selected, ChatLineModel::ColumnType minColumn = ChatLineModel::ContentsColumn);
    void setHighlighted(bool highlighted);

    void clearCache();

protected:
    virtual bool sceneEvent(QEvent *event);

    // These need to be relayed to the appropriate ChatItem
    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
    virtual void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
    virtual void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
    virtual void hoverMoveEvent(QGraphicsSceneHoverEvent *event);

    ChatItem *mouseEventTargetItem(const QPointF &pos);

    inline ChatItem *mouseGrabberItem() const { return _mouseGrabberItem; }
    void setMouseGrabberItem(ChatItem *item);

private:
    int _row;
    QAbstractItemModel *_model;
    ContentsChatItem _contentsItem;
    SenderChatItem _senderItem;
    TimestampChatItem _timestampItem;
    qreal _width, _height;

    enum { ItemMask = 0x3f,
           Selected = 0x40,
           Highlighted = 0x80 };
    // _selection[1..0] ... Min Selected Column (See MessageModel::ColumnType)
    // _selection[5..2] ... reserved for new column types
    // _selection[6] ...... Selected
    // _selection[7] ...... Highlighted
    quint8 _selection; // save space, so we put both the col and the flags into one byte

    ChatItem *_mouseGrabberItem;
    ChatItem *_hoverItem;
};


#endif
