//
// Created by Krad on 2021/10/12.
//

#ifndef GUI_DEVICEMANAGER_H
#define GUI_DEVICEMANAGER_H

#include <QObject>
#include <QThread>

class DeviceManager : public QObject {
Q_OBJECT

public:
    static DeviceManager *Default() {
        static DeviceManager manager;
        return &manager;
    }

    DeviceManager() = default;

    ~DeviceManager() override = default;

    DeviceManager(const DeviceManager &) = delete;

    DeviceManager operator=(const DeviceManager &) = delete;

    /**
     * init device, include Shimlib and it's error call back,
     * deviceInfTimer to get temperature of water, and the
     * preview data caller thread.
     */
    void initDevice();

    /**
     * close and release the device reference resource.
     */
    void close();

    /**
     * Get Firm ware version
     * @return Firm ware version
     */
    static QString getSoftwareVersion();

    /**
     * Get Scan data output path
     * @return Scan data output path
     */
    static QString getScanOutputPath();

    void setErrorOccurred(bool v) {
        mErrorOccurred = v;
    }

    bool getErrorOccurred() {
        return mErrorOccurred;
    }

    void emitErrorCallback(const char *msg);
    void emitInfoCallback(const char* aMessage,const unsigned int aInfoType);

signals:

    void raiseGlobalError(QString msg);
    void raiseGlobalInfo(const QPair<QString,unsigned int>& aInfoData);

protected:
    void timerEvent(QTimerEvent *event) override;

private:
    /**
     * To start a new scan operation
     * @param json The patient information json string
     * @param empty Empty scan flag
     */
    void startScan(const char *json, bool empty = false);

    /**
     * Post Scan start command to Shimlib
     */
    void postScanCommand();

    /**
     * Post Continue Scan command to Shimlib
     * @param useTimer start a new timer flag
     */
    void postContinueCommand(bool useTimer = false);

    /**
     * Prepare for finishing the Scan
     */
    void prepareFinishScan();

    /**
     * exit the current Scan process timer
     */
    void exitScanTimer();

    /**
     * Process scan progress change
     * @param Scan progress
     */
    void scanProcess(int aProgress);

    void initPreviewThread();

    void stopScan();

    void startPreview();

    int mScanPhase = 1;
    volatile int mTimerID = -1;
    int mDeviceInfTimerID = -1;
    int mLastStatus = -1;
    bool mPreviewing = false;
    volatile bool mEndLoop = false;
    volatile bool mErrorOccurred = false;
    QThread *mPreviewDataCaller = nullptr;


};


#endif //GUI_DEVICEMANAGER_H