#ifndef QHOTKEY_P_H
#define QHOTKEY_P_H

#include "qhotkey.h"
#include <QAbstractNativeEventFilter>
#include <QGlobalStatic>
#include <QMultiHash>
#include <QMutex>

class QHOTKEY_SHARED_EXPORT QHotkeyPrivate
  : public QObject
  , public QAbstractNativeEventFilter
{
    Q_OBJECT

public:
    QHotkeyPrivate(); // singleton!!!
    ~QHotkeyPrivate();

    static QHotkeyPrivate* instance();
    static bool isPlatformSupported();

    QHotkey::NativeShortcut nativeShortcut(Qt::Key keycode,
                                           Qt::KeyboardModifiers modifiers);

    bool addShortcut(QHotkey* hotkey);
    bool removeShortcut(QHotkey* hotkey);

protected:
    void activateShortcut(QHotkey::NativeShortcut shortcut);
    void releaseShortcut(QHotkey::NativeShortcut shortcut);

    virtual quint32 nativeKeycode(Qt::Key keycode,
                                  bool& ok) = 0; // platform implement
    virtual quint32 nativeModifiers(Qt::KeyboardModifiers modifiers,
                                    bool& ok) = 0; // platform implement

    virtual bool registerShortcut(
      QHotkey::NativeShortcut shortcut) = 0; // platform implement
    virtual bool unregisterShortcut(
      QHotkey::NativeShortcut shortcut) = 0; // platform implement

    QString error;

private:
    QHash<QPair<Qt::Key, Qt::KeyboardModifiers>, QHotkey::NativeShortcut>
      mapping;
    QMultiHash<QHotkey::NativeShortcut, QHotkey*> shortcuts;

    Q_INVOKABLE void addMappingInvoked(Qt::Key keycode,
                                       Qt::KeyboardModifiers modifiers,
                                       QHotkey::NativeShortcut nativeShortcut);
    Q_INVOKABLE bool addShortcutInvoked(QHotkey* hotkey);
    Q_INVOKABLE bool removeShortcutInvoked(QHotkey* hotkey);
    Q_INVOKABLE QHotkey::NativeShortcut nativeShortcutInvoked(
      Qt::Key keycode,
      Qt::KeyboardModifiers modifiers);
};

#define NATIVE_INSTANCE(ClassName)                                             \
    Q_GLOBAL_STATIC(ClassName, hotkeyPrivate)                                  \
                                                                               \
    QHotkeyPrivate* QHotkeyPrivate::instance() { return hotkeyPrivate; }

Q_DECLARE_METATYPE(Qt::Key)
Q_DECLARE_METATYPE(Qt::KeyboardModifiers)

#endif // QHOTKEY_P_H