// SPDX-FileCopyrightText: 2014 Dax89
// SPDX-License-Identifier: MIT

#pragma once

#include <QObject>

#define DEFAULT_HEX_LINE_LENGTH 0x10
#define DEFAULT_AREA_IDENTATION 0x01

struct QHexPosition {
    quint64 line;
    int column;
    quint8 lineWidth;
    int nibbleindex;

    QHexPosition() = default;
    inline qint64 offset() const
    {
        return static_cast<qint64>(line * lineWidth) + column;
    }
    inline int operator-(const QHexPosition &rhs) const
    {
        return this->offset() - rhs.offset();
    }
    inline bool operator==(const QHexPosition &rhs) const
    {
        return (line == rhs.line) && (column == rhs.column) && (nibbleindex == rhs.nibbleindex);
    }
    inline bool operator!=(const QHexPosition &rhs) const
    {
        return (line != rhs.line) || (column != rhs.column) || (nibbleindex != rhs.nibbleindex);
    }
};

class QHexCursor : public QObject
{
    Q_OBJECT

public:
    enum InsertionMode { OverwriteMode, InsertMode };

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

public:
    const QHexPosition &selectionStart() const;
    const QHexPosition &selectionEnd() const;
    const QHexPosition &position() const;
    InsertionMode insertionMode() const;
    int selectionLength() const;
    quint64 currentLine() const;
    int currentColumn() const;
    int currentNibble() const;
    quint64 selectionLine() const;
    int selectionColumn() const;
    int selectionNibble() const;
    bool atEnd() const;
    bool isLineSelected(quint64 line) const;
    bool hasSelection() const;
    void clearSelection();

public:
    void moveTo(const QHexPosition &pos);
    void moveTo(quint64 line, int column, int nibbleindex = 1);
    void moveTo(qint64 offset);
    void select(const QHexPosition &pos);
    void select(quint64 line, int column, int nibbleindex = 1);
    void select(int length);
    void selectOffset(qint64 offset, int length);
    void setInsertionMode(InsertionMode mode);
    void setLineWidth(quint8 width);
    void switchInsertionMode();

Q_SIGNALS:
    void positionChanged();
    void insertionModeChanged();

private:
    InsertionMode m_insertionmode;
    quint8 m_lineWidth;
    QHexPosition m_position, m_selection;
};