#include <json-c/json.h>
#include <curl/curl.h>
#include <geoclue.h>

GClueSimple *geoclue_simple = NULL;
GClueClient *geoclue_client = NULL;
GMainLoop *main_loop;

gboolean on_location_timeout(gpointer user_data) {
	(void) user_data;

	g_clear_object(&geoclue_client);
	g_clear_object(&geoclue_simple);
	g_main_loop_quit(main_loop);

	return FALSE;
}

void get_location(GClueSimple *simple) {
	(void) simple;

	GClueLocation *location;
	gdouble latitude, longitude, altitude, accuracy;
	GVariant *timestamp;
	// const char *description;

	location = gclue_simple_get_location(simple);
	json_object *location_json = json_object_new_object();

	latitude = gclue_location_get_latitude(location);
	longitude = gclue_location_get_longitude(location);
	altitude = gclue_location_get_altitude(location);
	accuracy = gclue_location_get_accuracy(location);

	json_object *latitude_json = json_object_new_double(latitude);
	json_object_object_add(location_json, "lat", latitude_json);
	json_object *longitude_json = json_object_new_double(longitude);
	json_object_object_add(location_json, "lon", longitude_json);
	json_object *altitude_json = json_object_new_double(altitude);
	json_object_object_add(location_json, "alt", altitude_json);
	json_object *accuracy_json = json_object_new_double(accuracy);
	json_object_object_add(location_json, "acc", accuracy_json);
	timestamp = gclue_location_get_timestamp(location);
	if (timestamp) {
		unsigned long timestamp_sec, timestamp_usec;
		g_variant_get(timestamp, "(tt)", &timestamp_sec, &timestamp_usec);

		json_object *timestamp_json = json_object_new_int(timestamp_sec);
		json_object_object_add(location_json, "tst", timestamp_json);
	}

	const char *location_payload = json_object_to_json_string(location_json);
	printf("%s\n", location_payload);
}

void on_geoclue_client_active(GClueClient *geoclue_client, GParamSpec *parameter_spec, gpointer user_data) {
	(void) parameter_spec;
	(void) user_data;

	if (gclue_client_get_active(geoclue_client))
		return;

	printf("Geolocation disabled, can't continue... \n");
	on_location_timeout(NULL);
}

void on_geoclue_ready(GObject *source_object, GAsyncResult *result, gpointer user_data) {
	(void) source_object;
	(void) user_data;

	GError *error = NULL;

	geoclue_simple = gclue_simple_new_with_thresholds_finish(result, &error);
	if (error != NULL) {
		printf("Couldn't connect to the GeoClue service : %s\n", error->message);

		exit(-1);
	}

	geoclue_client = gclue_simple_get_client(geoclue_simple);
	if (geoclue_client) {
		g_object_ref(geoclue_client);
		printf("GeoClue client ready ! \n");

		g_signal_connect(geoclue_client, "notify::active", G_CALLBACK(on_geoclue_client_active), NULL);
	}

	get_location(geoclue_simple);

	g_signal_connect(geoclue_client, "notify::location", G_CALLBACK(get_location), NULL);

}

int main(int argc, const char *argv[]) {
	(void) argc;
	(void) argv;

	gclue_simple_new("phonetrackd", GCLUE_ACCURACY_LEVEL_EXACT, NULL, on_geoclue_ready, NULL);

	main_loop = g_main_loop_new(NULL, FALSE);
	g_main_loop_run(main_loop);

	return 0;
}