#pragma once

#include <string>
#include <utility>
#include <vector>

#include <QObject>

typedef struct _GstDevice GstDevice;

class CallDevices : public QObject
{
        Q_OBJECT

public:
        static CallDevices &instance()
        {
                static CallDevices instance;
                return instance;
        }

        bool haveMic() const;
        bool haveCamera() const;
        std::vector<std::string> names(bool isVideo, const std::string &defaultDevice) const;
        std::vector<std::string> resolutions(const std::string &cameraName) const;
        std::vector<std::string> frameRates(const std::string &cameraName,
                                            const std::string &resolution) const;

signals:
        void devicesChanged();

private:
        CallDevices();

        friend class WebRTCSession;
        void init();
        GstDevice *audioDevice() const;
        GstDevice *videoDevice(std::pair<int, int> &resolution,
                               std::pair<int, int> &frameRate) const;

public:
        CallDevices(CallDevices const &) = delete;
        void operator=(CallDevices const &) = delete;
};