/*  Copyright (C) 2019-2020 Andreas Shimokawa, vanous

    This file is part of Gadgetbridge.

    Gadgetbridge is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published
    by the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Gadgetbridge 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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
package nodomain.freeyourgadget.gadgetbridge.model;

import android.content.Context;
import android.widget.Toast;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Calendar;
import java.util.List;

import nodomain.freeyourgadget.gadgetbridge.GBApplication;
import nodomain.freeyourgadget.gadgetbridge.activities.charts.ActivityAnalysis;
import nodomain.freeyourgadget.gadgetbridge.database.DBHandler;
import nodomain.freeyourgadget.gadgetbridge.devices.DeviceCoordinator;
import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
import nodomain.freeyourgadget.gadgetbridge.entities.AbstractActivitySample;
import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
import nodomain.freeyourgadget.gadgetbridge.util.DeviceHelper;
import nodomain.freeyourgadget.gadgetbridge.util.GB;


public class DailyTotals {
    private static final Logger LOG = LoggerFactory.getLogger(DailyTotals.class);


    public long[] getDailyTotalsForAllDevices(Calendar day) {
        Context context = GBApplication.getContext();
        //get today's steps for all devices in GB
        long all_steps = 0;
        long all_sleep = 0;

        if (context instanceof GBApplication) {
            GBApplication gbApp = (GBApplication) context;
            List<? extends GBDevice> devices = gbApp.getDeviceManager().getDevices();
            for (GBDevice device : devices) {
                DeviceCoordinator coordinator = DeviceHelper.getInstance().getCoordinator(device);
                if (!coordinator.supportsActivityDataFetching() && !coordinator.supportsActivityTracking()) {
                    continue;
                }
                long[] all_daily = getDailyTotalsForDevice(device, day);
                all_steps += all_daily[0];
                all_sleep += all_daily[1];
            }
        }
        //LOG.debug("gbwidget daily totals, all steps:" + all_steps);
        //LOG.debug("gbwidget  daily totals, all sleep:" + all_sleep);
        return new long[]{all_steps, all_sleep};
    }


    public long[] getDailyTotalsForDevice(GBDevice device, Calendar day) {

        try (DBHandler handler = GBApplication.acquireDB()) {
            return getDailyTotalsForDevice(device, day, handler);

        } catch (Exception e) {
            //GB.toast("Error loading sleep/steps widget data for device: " + device, Toast.LENGTH_SHORT, GB.ERROR, e);
            return new long[]{0, 0};
        }
    }

    public long[] getDailyTotalsForDevice(GBDevice device, Calendar day, DBHandler handler) {
            ActivityAnalysis analysis = new ActivityAnalysis();
            ActivityAmounts amountsSteps;
            ActivityAmounts amountsSleep;

            amountsSteps = analysis.calculateActivityAmounts(getSamplesOfDay(handler, day, 0, device));
            amountsSleep = analysis.calculateActivityAmounts(getSamplesOfDay(handler, day, -12, device));

            long[] sleep = getTotalsSleepForActivityAmounts(amountsSleep);
            long steps = getTotalsStepsForActivityAmounts(amountsSteps);

            return new long[]{steps, sleep[0] + sleep[1] + sleep[2]};
    }

    private long[] getTotalsSleepForActivityAmounts(ActivityAmounts activityAmounts) {
        long totalSecondsDeepSleep = 0;
        long totalSecondsLightSleep = 0;
        long totalSecondsRemSleep = 0;
        for (ActivityAmount amount : activityAmounts.getAmounts()) {
            if (amount.getActivityKind() == ActivityKind.TYPE_DEEP_SLEEP) {
                totalSecondsDeepSleep += amount.getTotalSeconds();
            } else if (amount.getActivityKind() == ActivityKind.TYPE_LIGHT_SLEEP) {
                totalSecondsLightSleep += amount.getTotalSeconds();
            } else if (amount.getActivityKind() == ActivityKind.TYPE_REM_SLEEP) {
                totalSecondsRemSleep += amount.getTotalSeconds();
            }
        }
        long totalMinutesDeepSleep = (totalSecondsDeepSleep / 60);
        long totalMinutesLightSleep = (totalSecondsLightSleep / 60);
        long totalMinutesRemSleep = (totalSecondsRemSleep / 60);
        return new long[]{totalMinutesDeepSleep, totalMinutesLightSleep, totalMinutesRemSleep};
    }


    public long getTotalsStepsForActivityAmounts(ActivityAmounts activityAmounts) {
        long totalSteps = 0;

        for (ActivityAmount amount : activityAmounts.getAmounts()) {
            totalSteps += amount.getTotalSteps();
        }
        return totalSteps;
    }


    private List<? extends ActivitySample> getSamplesOfDay(DBHandler db, Calendar day, int offsetHours, GBDevice device) {
        int startTs;
        int endTs;

        day = (Calendar) day.clone(); // do not modify the caller's argument
        day.set(Calendar.HOUR_OF_DAY, 0);
        day.set(Calendar.MINUTE, 0);
        day.set(Calendar.SECOND, 0);
        day.add(Calendar.HOUR, offsetHours);

        startTs = (int) (day.getTimeInMillis() / 1000);
        endTs = startTs + 24 * 60 * 60 - 1;

        return getSamples(db, device, startTs, endTs);
    }


    public List<? extends ActivitySample> getSamples(DBHandler db, GBDevice device, int tsFrom, int tsTo) {
        return getAllSamples(db, device, tsFrom, tsTo);
    }


    protected SampleProvider<? extends AbstractActivitySample> getProvider(DBHandler db, GBDevice device) {
        DeviceCoordinator coordinator = DeviceHelper.getInstance().getCoordinator(device);
        return coordinator.getSampleProvider(device, db.getDaoSession());
    }

    protected List<? extends ActivitySample> getAllSamples(DBHandler db, GBDevice device, int tsFrom, int tsTo) {
        SampleProvider<? extends ActivitySample> provider = getProvider(db, device);
        return provider.getAllActivitySamples(tsFrom, tsTo);
    }

    public ActivitySample getFirstSample(DBHandler db, GBDevice device) {
        SampleProvider<? extends ActivitySample> provider = getProvider(db, device);
        return provider.getFirstActivitySample();
    }

}