#ifndef OVERVIEWVIEW_H
#define OVERVIEWVIEW_H

#include <QWidget>
#include <QPainter>
#include <QRect>
#include "widgets/GraphView.h"

class OverviewView : public GraphView
{
    Q_OBJECT

signals:
    /*
     * \brief signal when mouse is pressed or moved so that
     * Graph can refresh its contents corresponded with Overview
     */
    void mouseMoved();

public:
    OverviewView(QWidget *parent);
    ~OverviewView() override;

    /*
     * \brief a rect on Overview to show where you are on Graph
     */
    QRectF rangeRect;

    /*
     * \brief offset for the rect which is put when either of the scrollbar of
     * Graph is not visible.
     */
    qreal h_offset = 0;
    qreal v_offset = 0;

    /*
     * \brief Graph access this function to set minimum set of the data
     * @param baseWidth width of Graph when it computed the blocks
     * @param baseHeigh height of Graph when it computed the blocks
     * @param baseBlocks computed blocks passed by Graph
     */
    void setData(int baseWidth, int baseHeight, std::unordered_map<ut64, GraphBlock> baseBlocks);

public slots:
    /*
     * \brief refresh the view and adjust the scale
     */
    void refreshView();

private slots:
    /*
     * \brief update Colors.
     * for example this will be called when the theme is changed.
     */
    void colorsUpdatedSlot();

protected:
    /*
     * \brief mousePressEvent to start moving the rect.
     */
    void mousePressEvent(QMouseEvent *event) override;
    /*
     * \brief mouseReleaseEvent to tell not to move the rect anymore.
     */
    void mouseReleaseEvent(QMouseEvent *event) override;
    /*
     * \brief mouseMoveEvent to move the rect.
     */
    void mouseMoveEvent(QMouseEvent *event) override;

private:
    /*
     * \brief this will be handled in mouse events to move the rect properly
     * along with the mouse.
     */
    bool mouseActive = false;

    /*
     * \brief save the initial distance
     * between the point where the mouse was pressed and the point of the rect
     * so as to change the rect point properly along with mouse.
     */
    QPointF initialDiff;

    /*
     * \brief draw the computed blocks passed by Graph
     */
    virtual void drawBlock(QPainter &p, GraphView::GraphBlock &block) override;

    /*
     * \brief override the edgeConfiguration so as to
     * adjust the width of the edges by the scale
     * @return EdgeConfiguration
     */
    virtual GraphView::EdgeConfiguration edgeConfiguration(GraphView::GraphBlock &from,
                                                           GraphView::GraphBlock *to) override;

    /*
     * \brief override the paintEvent to draw the rect on Overview
     */
    void paintEvent(QPaintEvent *event) override;

    /*
     * \brief apply scale properly on the view
     */
    void adjustScale();

    /*
     * \brief if the mouse is in the rect in Overview.
     */
    bool mouseContainsRect(QMouseEvent *event);

    /*
     * \brief base background color changing depending on the theme
     */
    QColor disassemblyBackgroundColor;

    /*
     * \brief color for each node changing depending on the theme
     */
    QColor graphNodeColor;
};

#endif // OVERVIEWVIEW_H