#ifndef UVCDEVICE_MANAGER_H
#define UVCDEVICE_MANAGER_H

#include "../libuvc/libuvc.h"
#include "../MppDecoder/MppDecoder.h"
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
#include "UVCCallBack.h"
#include <list>
#include "UVCDevice.h"
#include <iostream>
#include <memory>
#include "../gpio_explorer.hpp"
#include "../DataManager/DataManager.h"

class UVCManager
{
public:
    static UVCManager &getInstance()
    {
        static UVCManager instance;
        return instance;
    }

    void init(int nWaitingTime);

    void setDeviceNumber(int deviceNumber, int TotoalDeviceNumber)
    {
        int nNumber = int(uvcDeviceList.size());
        if (deviceNumber >= nNumber)
        {
            std::cerr << "Device number out of range" << std::endl;
            return;
        }
        std::list<UVCDevice *>::iterator it = uvcDeviceList.begin();
        std::advance(it, deviceNumber);
        std::cout << "Setting device number: " << TotoalDeviceNumber << std::endl;
        (*it)->setTotalIndex(TotoalDeviceNumber);
    }

    int getDeviceNumber(int deviceNumber)
    {
        int nNumber = int(uvcDeviceList.size());
        if (deviceNumber >= nNumber)
        {
            std::cerr << "Device number out of range" << std::endl;
            return -1;
        }
        std::list<UVCDevice *>::iterator it = uvcDeviceList.begin();
        std::advance(it, deviceNumber);
        return (*it)->getTotalIndex();
    }

    int deliverFrameInCallBack(uvc_device_handle_t *devh);

    void startAllStreaming();

    void stopAllStreaming();

    uvc_context_t *getContext()
    {
        return ctx;
    }

private:
    UVCManager()
    {
        uvc_init(&ctx, NULL);
    }

    ~UVCManager()
    {
        uvc_exit(ctx);
    }

    UVCManager(const UVCManager &) = delete;
    UVCManager &operator=(const UVCManager &) = delete;

    uvc_context_t *ctx;
    // device list
    uvc_device_t **deviceList;
    // device number
    int deviceNum;

    // the UVC device list is been managed by UVCManager
    std::list<UVCDevice *> uvcDeviceList;

    //
    std::shared_ptr<GPIOExplorer> m_GpioExplorer;
};

#endif // UVCDEVICE_MANAGER_H