#ifndef EXPRESSIONSORTER_H
#define EXPRESSIONSORTER_H

#include "sorter.h"
#include <QQmlScriptString>

class QQmlExpression;

namespace qqsfpm {

class QQmlSortFilterProxyModel;

class ExpressionSorter : public Sorter
{
    Q_OBJECT
    Q_PROPERTY(QQmlScriptString expression READ expression WRITE setExpression NOTIFY expressionChanged)

public:
    using Sorter::Sorter;

    const QQmlScriptString& expression() const;
    void setExpression(const QQmlScriptString& scriptString);

    void proxyModelCompleted(const QQmlSortFilterProxyModel& proxyModel) override;

Q_SIGNALS:
    void expressionChanged();

protected:
    int compare(const QModelIndex& sourceLeft, const QModelIndex& sourceRight, const QQmlSortFilterProxyModel& proxyModel) const override;

private:
    void updateContext(const QQmlSortFilterProxyModel& proxyModel);
    void updateExpression();

    QQmlScriptString m_scriptString;
    QQmlExpression* m_expression = nullptr;
    QQmlContext* m_context = nullptr;
};

}

#endif // EXPRESSIONSORTER_H