//
// 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
     */
    QString getSoftwareVersion();

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

    void setErrorOccurred(bool v){
        errorOccurred = v;
    }
    bool getErrorOccurred(){
        return errorOccurred;
    }
    void emitErrorCallback(const char * msg);
    signals:
    void raiseGlobalError(QString msg);

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 progress);

	int scanPhase = 1;
    volatile int timerID = -1;
	int deviceInfTimerID = -1;
	int lastStatus = -1;
	bool previewing = false;
	volatile bool endLoop = false;
    volatile bool errorOccurred = false;
	QThread* previewDataCaller = nullptr;
};


#endif //GUI_DEVICEMANAGER_H