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#ifndef VARIANTSGROUPMODEL_H
#define VARIANTSGROUPMODEL_H

#include <QtCore/qabstractitemmodel.h>

class VariantsTagModel;

class VariantsGroupModel : public QAbstractListModel
{
    Q_OBJECT
    Q_PROPERTY(bool variantsEmpty MEMBER m_variantsEmpty NOTIFY varaintsEmptyChanged)

public:
Q_SIGNALS:
    void varaintsEmptyChanged();

public:
    explicit VariantsGroupModel(QObject *parent = nullptr);

    enum Roles {
        GroupTitleRole = Qt::UserRole + 1,
        GroupColorRole,
        TagRole
    };

    struct TagGroupData
    {
        QString m_title;
        QString m_color;
        VariantsTagModel *m_tagsModel = nullptr;
    };

    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
    QVariant data(const QModelIndex &index, int role = GroupTitleRole) const override;

    Qt::ItemFlags flags(const QModelIndex& index) const override;

    void refresh();

    Q_INVOKABLE void setTagState(const QString &group, const QString &tag, bool selected);
    Q_INVOKABLE void addNewTag(const QString &group);
    Q_INVOKABLE void addNewGroup();
    Q_INVOKABLE void importVariants();
    Q_INVOKABLE void exportVariants();


protected:
      QHash<int, QByteArray> roleNames() const override;

private:
      QVector<TagGroupData> m_data;
      int m_instance = 0; // selected layer instance
      int m_property = 0; // variant tags property handler
      bool m_variantsEmpty = true; // no groups (nor tags)
};

#endif // VARIANTSGROUPMODEL_H