#ifndef CNODEITEM_H
#define CNODEITEM_H

#include <QObject>

#include "CNode.h"

#include <QPoint>

class CRectItem;
class CTextItem;
class CLineItem;

class CNodeItem : public QObject
{
    Q_OBJECT
public:
    explicit CNodeItem(const CNodeData data, CNodeItem *parent = nullptr);

    CNodeData data() const;
    void setData(CNodeData data);

    void addSubNode(CNodeItem *n);
    void removeNode(int number);

    CNodeItem *subNode(int number);

    CRectItem *rectItem() const;
    CTextItem *textItem() const;
    CLineItem *lineItem() const;

    QPointF pos() const;
    void setPos(const QPointF pos);

    qreal xMargin() const;
    void setXMargin(qreal x);

    qreal yMargin() const;
    void setYMargin(qreal y);

    qreal minWidth() const;
    void setMinWidth(qreal w);

    qreal maxWidth() const;
    void setMaxWidth(qreal w);

    qreal minHeight() const;
    void setMinHeight(qreal h);

    void connectSignalsAndSlots();

    void updateItemsGeometry();

    int height() const;  // 节点的高度

    int depth() const;  // 节点的深度

    int leafs() const;  // 叶子节点个数或包含的路径条数

    ///
    /// \brief sizeOfLevel 以此节点为根节点的子树中，某一层的节点数
    /// \param lev 节点层级，当前节点为1，向下递增
    /// \return 节点数
    ///
    int sizeOfLevel(int lev) const;

    qreal textWidth() const;
    qreal textHeight() const;

    qreal borderWidth() const;
    qreal borderHeight() const;

    qreal hNodeSpace() const;
    void setHNodeSpace(qreal h);

    qreal vNodeSpace() const;
    void setVNodeSpace(qreal v);

    /// 子节点的布局高度
    qreal childrenHeight() const;

    /// 以此节点为根节点的子树的布局高度
    qreal treeHeight() const;

    ///
    /// \brief maxBorderWidthOfLevel 以此节点为根节点的子树中，某一层所有同辈节点中的最大边框宽度
    /// \param lev 节点层级，当前节点为1，向下递增
    /// \return 边框宽度
    ///
    qreal maxBorderWidthOfLevel(int lev = 1) const;

    void beginEditing();

    void endEditing();

    CNodeItem *editingNode();

    void setHighlighted(bool h);

signals:
    void sigEditNode(CNodeData n);
    void sigAddSubItem(int pNumber);
    void sigRemoveItem(int number);
    void sigTextChanged();
    void sigWillBeginEditing();

public slots:
    void slotEditNode();
    void slotSelect();
    void slotSubNode();
    void slotRemove();
    void slotTextChanged();
    void slotWillBeginEditing();

private:
    CNodeData m_data;

    CRectItem *m_rectItem = nullptr;
    CTextItem *m_textItem = nullptr;
    CLineItem *m_lineItem = nullptr;

    QPointF m_pos;

    qreal m_xMargin = 10;
    qreal m_yMargin = 5;

    qreal m_minWidth  = 200;
    qreal m_maxWidth  = 300;
    qreal m_minHeight = 30;

    qreal m_hNodeSpace = 80;
    qreal m_vNodeSpace = 10;
};

#endif  // CNODEITEM_H