/*
 * Copyright (C) 2023 Arseniy Movshev <dodoradio@outlook.com>
 * This file is part of sensorlogd, a sensor logger for the AsteroidOS smartwatch OS.
 *
 * sensorlogd is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 * sensorlogd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

#include <QDateTime>
#include <QTimer>
#include <QtSensors/QStepCounterSensor>
#include <QDebug>
#include <QString>

#include "../logger.h"

#include "stepCounter.h"

StepCounterPlugin::StepCounterPlugin(QObject *parent, int initInterval)  :
    QObject(parent){
    interval = initInterval;

    stepcounterSensor = new QStepCounterSensor(this);
    stepcounterSensor->start();

    qDebug() << "step counter sensor is enabled. interval is (ms) " << interval;
    recordIntervalTimer = new QTimer(this);
    connect(recordIntervalTimer,SIGNAL(timeout()),this,SLOT(triggerRecording()));
    recordIntervalTimer->setSingleShot(true);
    recordIntervalTimer->start(interval);

    QDateTime currDateTime = QDateTime::currentDateTime();

    setupFilePath(sensorPathPrefix);

    if (dayFileExists(sensorPathPrefix)) {
        QStringList lastLineData = fileGetPrevRecord(sensorPathPrefix);
        lastRecordTime = QDateTime::fromSecsSinceEpoch(lastLineData[0].toInt());
        if (stepcounterSensor->reading()->steps() == 0) {
            stepsOffset = -(lastLineData[1].toInt());
        } else {

        }
    } else {
        //if it's a new day, we 'reset' the counter. this is crude - we should really check for a boot here, since certain machines have capability of counting steps when powered down.
        stepsOffset = stepcounterSensor->reading()->steps();
    }
}

void StepCounterPlugin::timeUpdate() {
    QDateTime currDateTime = QDateTime::currentDateTime();
    if (lastRecordTime.date() < currDateTime.date()) {
        stepsOffset = stepcounterSensor->reading()->steps(); //this 'resets' the reading whenever the screen is first turned on after midnight. this means that, in the morning, the step count will always be zero, but steps taken just before midnight are still counted and not discarded.
    }
    uint elapsed = currDateTime.toMSecsSinceEpoch() - lastRecordTime.toMSecsSinceEpoch();
    qDebug() << "time until next steps recording" << recordIntervalTimer->remainingTime() << " elapsed = " << elapsed << " lastRecordTime " << lastRecordTime.toMSecsSinceEpoch();
    if (elapsed > interval) { //if too much time has passed, reset the timer and record
        triggerRecording();
        lastRecordTime = QDateTime::currentDateTime();
    } else { //otherwise, restart the timer and compensate for time spent in suspend
        recordIntervalTimer->start(interval - elapsed);
    }
}

void StepCounterPlugin::triggerRecording() {
    qDebug() << "stepcounter interval recording";
    int steps = stepcounterSensor->reading()->steps();
    qDebug() << QDateTime::currentDateTime().toString("hh:mm:ss") << " : " << steps << stepcounterSensor->isActive();
    //we probably ought to do some error checking here
    fileAddRecord(sensorPathPrefix,QString::number(steps - stepsOffset));
}