#ifndef FUNCTIONSWIDGET_H
#define FUNCTIONSWIDGET_H

#include <memory>

#include <QSortFilterProxyModel>
#include <QTreeView>

#include "Cutter.h"
#include "CutterDockWidget.h"

class MainWindow;
class QTreeWidgetItem;
class FunctionsTask;
class FunctionsWidget;

namespace Ui {
class FunctionsWidget;
}


class FunctionModel : public QAbstractItemModel
{
    Q_OBJECT

    friend FunctionsWidget;

private:
    QList<FunctionDescription> *functions;
    QSet<RVA> *importAddresses;
    ut64 *mainAdress;


    QFont highlightFont;
    QFont defaultFont;
    bool nested;

    int currentIndex;

    bool functionIsImport(ut64 addr) const;

    bool functionIsMain(ut64 addr) const;

public:
    static const int FunctionDescriptionRole = Qt::UserRole;
    static const int IsImportRole = Qt::UserRole + 1;

    enum Column { NameColumn = 0, SizeColumn, ImportColumn, OffsetColumn, NargsColumn, NbbsColumn,
                  NlocalsColumn, CcColumn, CalltypeColumn, EdgesColumn, CostColumn, CallsColumn,
                  FrameColumn, ColumnCount
                };

    FunctionModel(QList<FunctionDescription> *functions, QSet<RVA> *importAddresses, ut64 *mainAdress,
                  bool nested, QFont defaultFont, QFont highlightFont, QObject *parent = nullptr);

    QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
    QModelIndex parent(const QModelIndex &index) const;

    int rowCount(const QModelIndex &parent = QModelIndex()) const;
    int columnCount(const QModelIndex &parent = QModelIndex()) const;

    QVariant data(const QModelIndex &index, int role) const;
    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;

    /*!
     * @return true if the index changed
     */
    bool updateCurrentIndex();

    void setNested(bool nested);
    bool isNested()
    {
        return nested;
    }

private slots:
    void seekChanged(RVA addr);
    void functionRenamed(const QString &prev_name, const QString &new_name);
};


class FunctionSortFilterProxyModel : public QSortFilterProxyModel
{
    Q_OBJECT

public:
    FunctionSortFilterProxyModel(FunctionModel *source_model, QObject *parent = nullptr);

protected:
    bool filterAcceptsRow(int row, const QModelIndex &parent) const override;
    bool lessThan(const QModelIndex &left, const QModelIndex &right) const override;
};



class FunctionsWidget : public CutterDockWidget
{
    Q_OBJECT

public:
    explicit FunctionsWidget(MainWindow *main, QAction *action = nullptr);
    ~FunctionsWidget();

private slots:
    void onFunctionsDoubleClicked(const QModelIndex &index);
    void showFunctionsContextMenu(const QPoint &pt);

    void on_actionDisasAdd_comment_triggered();
    void on_actionFunctionsRename_triggered();
    void on_action_References_triggered();
    void on_actionFunctionsUndefine_triggered();

    void on_actionHorizontal_triggered();
    void on_actionVertical_triggered();

    void showTitleContextMenu(const QPoint &pt);

    void refreshTree();

protected:
    void resizeEvent(QResizeEvent *event) override;

private:
    std::unique_ptr<Ui::FunctionsWidget> ui;
    MainWindow      *main;

    QSharedPointer<FunctionsTask> task;

    QList<FunctionDescription> functions;
    QSet<RVA> importAddresses;
    ut64 mainAdress;

    FunctionModel *functionModel;
    FunctionSortFilterProxyModel *functionProxyModel;

    void setScrollMode();
};





#endif // FUNCTIONSWIDGET_H