#ifndef INVENTORYMANAGER_H
#define INVENTORYMANAGER_H

#include <memory>
#include <QGraphicsColorizeEffect>

/* QWInventoryManager
 * Controls everything related to inventory slots and their items. */

class QGraphicsWidget;
class QWScene;
class QWTrigger;

class QWInventoryManager final : public QObject
{
    Q_OBJECT
    Q_DISABLE_COPY_MOVE(QWInventoryManager)
private:
    QList<std::shared_ptr<QWTrigger>> list_inventory_icons;
    std::shared_ptr<QGraphicsWidget> ptr_panel;

    QWScene *ptr_scene;

    QRect rect_hidden;
    QRect rect_visible;

    using Index = QList<std::shared_ptr<QWTrigger>>::size_type;
    Index index_freepan;

    QGraphicsColorizeEffect *item_selected_effect;

    struct metadata
    {
        // the separator thinkness
        int length_wall;
        // the cell side
        int length_cell;
        // the maximum amount of items to hold
        int max_amount;
        // the left wall of first item slot
        int first_wall;
        // the color for selected items
        QColor clr_sel;
        // the color for selected items
        qreal clr_sth;
    } metadata;

    void reorganizeItems(Index i);

public:

    explicit QWInventoryManager(QWScene *sc);

    void setInventoryPanel(const std::shared_ptr<QGraphicsWidget> &panel) noexcept;

    inline int  freePanel() const noexcept;
    inline void freePanelToRight();
    inline void freePanelToLeft();

    void addInventoryIcon(std::shared_ptr<QWTrigger> &inventory_icon);
    void removeInventoryIcon(std::shared_ptr<QWTrigger> &inventory_icon);

public slots:
    void onClicked();
};

#endif // INVENTORYMANAGER_H