#ifndef QHOTKEY_H
#define QHOTKEY_H

#include <QKeySequence>
#include <QLoggingCategory>
#include <QObject>
#include <QPair>

#ifdef QHOTKEY_LIB
#ifdef QHOTKEY_LIB_BUILD
#define QHOTKEY_SHARED_EXPORT Q_DECL_EXPORT
#else
#define QHOTKEY_SHARED_EXPORT Q_DECL_IMPORT
#endif
#else
#define QHOTKEY_SHARED_EXPORT
#endif

//! A class to define global, systemwide Hotkeys
class QHOTKEY_SHARED_EXPORT QHotkey : public QObject
{
    Q_OBJECT
    //! @private
    friend class QHotkeyPrivate;

    //! Specifies whether this hotkey is currently registered or not
    Q_PROPERTY(bool registered READ isRegistered WRITE setRegistered NOTIFY
                 registeredChanged)
    //! Holds the shortcut this hotkey will be triggered on
    Q_PROPERTY(
      QKeySequence shortcut READ shortcut WRITE setShortcut RESET resetShortcut)

public:
    //! Defines shortcut with native keycodes
    class QHOTKEY_SHARED_EXPORT NativeShortcut
    {
    public:
        //! The native keycode
        quint32 key;
        //! The native modifiers
        quint32 modifier;

        //! Creates an invalid native shortcut
        NativeShortcut();
        //! Creates a valid native shortcut, with the given key and modifiers
        NativeShortcut(quint32 key, quint32 modifier = 0);

        //! Checks, whether this shortcut is valid or not
        bool isValid() const;

        //! Equality operator
        bool operator==(NativeShortcut other) const;
        //! Inequality operator
        bool operator!=(NativeShortcut other) const;

    private:
        bool valid;
    };

    //! Adds a global mapping of a key sequence to a replacement native shortcut
    static void addGlobalMapping(const QKeySequence& shortcut,
                                 NativeShortcut nativeShortcut);

    //! Checks if global shortcuts are supported by the current platform
    static bool isPlatformSupported();

    //! Default Constructor
    explicit QHotkey(QObject* parent = nullptr);
    //! Constructs a hotkey with a shortcut and optionally registers it
    explicit QHotkey(const QKeySequence& shortcut,
                     bool autoRegister = false,
                     QObject* parent = nullptr);
    //! Constructs a hotkey with a key and modifiers and optionally registers it
    explicit QHotkey(Qt::Key keyCode,
                     Qt::KeyboardModifiers modifiers,
                     bool autoRegister = false,
                     QObject* parent = nullptr);
    //! Constructs a hotkey from a native shortcut and optionally registers it
    explicit QHotkey(NativeShortcut shortcut,
                     bool autoRegister = false,
                     QObject* parent = nullptr);
    ~QHotkey() override;

    //! @readAcFn{QHotkey::registered}
    bool isRegistered() const;
    //! @readAcFn{QHotkey::shortcut}
    QKeySequence shortcut() const;
    //! @readAcFn{QHotkey::shortcut} - the key only
    Qt::Key keyCode() const;
    //! @readAcFn{QHotkey::shortcut} - the modifiers only
    Qt::KeyboardModifiers modifiers() const;

    //! Get the current native shortcut
    NativeShortcut currentNativeShortcut() const;

public slots:
    //! @writeAcFn{QHotkey::registered}
    bool setRegistered(bool registered);

    //! @writeAcFn{QHotkey::shortcut}
    bool setShortcut(const QKeySequence& shortcut, bool autoRegister = false);
    //! @writeAcFn{QHotkey::shortcut}
    bool setShortcut(Qt::Key keyCode,
                     Qt::KeyboardModifiers modifiers,
                     bool autoRegister = false);
    //! @resetAcFn{QHotkey::shortcut}
    bool resetShortcut();

    //! Set this hotkey to a native shortcut
    bool setNativeShortcut(QHotkey::NativeShortcut nativeShortcut,
                           bool autoRegister = false);

signals:
    //! Will be emitted if the shortcut is pressed
    void activated(QPrivateSignal);

    //! Will be emitted if the shortcut press is released
    void released(QPrivateSignal);

    //! @notifyAcFn{QHotkey::registered}
    void registeredChanged(bool registered);

private:
    Qt::Key _keyCode;
    Qt::KeyboardModifiers _modifiers;

    NativeShortcut _nativeShortcut;
    bool _registered;
};

uint QHOTKEY_SHARED_EXPORT qHash(QHotkey::NativeShortcut key);
uint QHOTKEY_SHARED_EXPORT qHash(QHotkey::NativeShortcut key, uint seed);

QHOTKEY_SHARED_EXPORT Q_DECLARE_LOGGING_CATEGORY(logQHotkey)

  Q_DECLARE_METATYPE(QHotkey::NativeShortcut)

#endif // QHOTKEY_H
