using Toybox.WatchUi as Ui;
using Toybox.System as Sys;
using Toybox.FitContributor as Fit;
using Toybox.Application as App;

const CURRENT_SGV_FIELD_ID = 0;
const LAP_SGV_FIELD_ID = 1;
const AVG_SGV_FIELD_ID = 2;


class SGVFitContributor {
	private const TAG = "SGVFitContributor";

    // FIT Contributions variables
    hidden var mCurrentSgvField = null;			//Instantaneous values
    hidden var mLapAverageSgvField = null;		//Lap average
    hidden var mSessionAverageSgvField = null;	//Session average

    // Variables for storing averages for the contribution:
    hidden var contrLapAverage = 0.0;
    hidden var contrSessionAverage = 0.0;
    hidden var contrLapRecordCount = 0;
    hidden var contrSessionRecordCount = 0;

    // Constructor
    function initialize(dataField) {
    	Sys.println(TAG + "-> initialize.");

        mCurrentSgvField = dataField.createField("Current_SGV", CURRENT_SGV_FIELD_ID, Fit.DATA_TYPE_FLOAT, { :nativeNum=>54, :mesgType=>Fit.MESG_TYPE_RECORD, :units=>"mmol/l" });
        mLapAverageSgvField = dataField.createField("Lap_average_SGV", LAP_SGV_FIELD_ID, Fit.DATA_TYPE_FLOAT, { :nativeNum=>84, :mesgType=>Fit.MESG_TYPE_LAP, :units=>"mmol/l"});
        mSessionAverageSgvField = dataField.createField("Session_average_SGV", AVG_SGV_FIELD_ID, Fit.DATA_TYPE_FLOAT, { :nativeNum=>95, :mesgType=>Fit.MESG_TYPE_SESSION, :units=>"mmol/l"});

        mCurrentSgvField.setData(0.0);
        mLapAverageSgvField.setData(0.0);
        mSessionAverageSgvField.setData(0.0);

        Sys.println("FIT field initialized.");
    }

    function compute(fitData) {
    	Sys.println(TAG + "-> compute");
    	Sys.println(fitData);
        if( fitData != null ) {
        	//Log current value:
        	mCurrentSgvField.setData(fitData);

 			Sys.println("ContrLapAverage= "+contrLapAverage);
 			Sys.println("ContrSessionAverage = "+contrSessionAverage);
 			Sys.println("Lap record count = "+contrLapRecordCount);

            Sys.println("Sgv lap average= "+contrLapAverage/contrLapRecordCount);
            Sys.println("Sgv session average = "+contrSessionAverage/contrSessionRecordCount);

            // Log lap/session FIT Contributions
            mLapAverageSgvField.setData(contrLapAverage/contrLapRecordCount);
            mSessionAverageSgvField.setData(contrSessionAverage/contrSessionRecordCount);


            Sys.println("FIT data recorded!");
        }
    }

    function updateAverages(lapAverage,sessionAverage,lapRecordCount,sessionRecordCount){
    	contrLapAverage = lapAverage;
    	contrSessionAverage = sessionAverage;
    	contrLapRecordCount = lapRecordCount;
    	contrSessionRecordCount = sessionRecordCount;
    }

}