/*
 * Copyright 2008 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package de.dennisguse.opentracks.util;

import android.location.Location;

/**
 * Utility class for decimating tracks at a given level of precision.
 *
 * @author Leif Hendrik Wilden
 */
public class LocationUtils {

    private static final String TAG = LocationUtils.class.getSimpleName();

    // 1 minute in milliseconds
    private static final long MAX_LOCATION_AGE_MS = (long) (UnitConversions.MIN_TO_S * UnitConversions.S_TO_MS);

    private LocationUtils() {
    }

    /**
     * Checks if a given location is a valid (i.e. physically possible) location on Earth.
     * Note: The special separator locations (which have latitude = 100) will not qualify as valid.
     * Neither will locations with lat=0 and lng=0 as these are most likely "bad" measurements which often cause trouble.
     *
     * @param location the location to test
     * @return true if the location is a valid location.
     */
    //TODO Move to TrackPoint
    @Deprecated //See #316
    public static boolean isValidLocation(Location location) {
        return location != null
                && Math.abs(location.getLatitude()) <= 90
                && Math.abs(location.getLongitude()) <= 180;
    }

    /**
     * Returns true if a location is old.
     *
     * @param location the location
     */
    public static boolean isLocationOld(Location location) {
        return !LocationUtils.isValidLocation(location) || (System.currentTimeMillis() - location.getTime() > MAX_LOCATION_AGE_MS);
    }
}