#include <locations.h>
#include <dlog.h> // for logging purposes

// Declaring location manager (in this example it is a global variable):
location_manager_h location_manager;

// Defining callback function for location service state change
// The callback will be run each time the location service state changes.
// The state will change for example when the user turns location on/off 
// in the phone settings.
void location_state_cb(location_service_state_e state, void *user_data)
{
    if (state == LOCATIONS_SERVICE_ENABLED)
    {
        LOGI("Location service enabled.");
        double altitude, latitude, longitude, climb, direction, speed;
        double horizontal, vertical;
        location_accuracy_level_e level;
        time_t timestamp;
        int err = location_manager_get_location(location_manager, &altitude, &latitude, &longitude,
                                           &climb, &direction, &speed, &level,
                                           &horizontal, &vertical, &timestamp);
        if (err == LOCATIONS_ERROR_NONE)
        {
            LOGI("Location: %f,%f,%f,%f,%f,%f,%f,%f", altitude, latitude, longitude, climb, direction, speed, level, horizontal, vertical);
        }
        else
        {
            LOGE("Location error!");
	    //handle error here
        }
    }
    if (state == LOCATIONS_SERVICE_DISABLED)
    {
        LOGI("Location is disabled!");
    }
}

// On startup of your service:

// Creating location manager for GPS
// The LOCATIONS_METHOD_GPS setting means that this location manager will use
// only GPS satellites information to check the device's location.
if (location_manager_create(LOCATIONS_METHOD_GPS, &location_manager) == LOCATIONS_ERROR_NONE)
{
    // Setting callback for state change
    if(location_manager_set_service_state_changed_cb(location_manager, location_state_cb, NULL) == LOCATIONS_ERROR_NONE)
    {
        LOGI("Location service callback added.");
    }
    // Starting service
    if(location_manager_start(location_manager) == LOCATIONS_ERROR_NONE)
    {
        LOGI("Location service started.");
    }
}

// On shutdown of your service:
if (location_manager_unset_service_state_changed_cb(location_manager) == LOCATIONS_ERROR_NONE)
{
    LOGI("Location service callback removed.");
}
// It is not necessary to call location_manager_stop() just before calling
// location_manager_destroy because the service is stopped automatically
// before destruction.
if (location_manager_destroy(location_manager) == LOCATIONS_ERROR_NONE)
{
    LOGI("Location manager destroyed.");
    location_manager = NULL;
}