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import polyline from "@mapbox/polyline";
import { getDistanceToPolyline } from "../utils/locationUtils";
import { getAllOutdoorDirectionsInfo } from "../api";
import useLocationStore from "./useLocationStore";
import useNavigationState from "./useNavigationState";
import useNavigationConfig from "./useNavigationConfig";
import {
LabeledCoordinate,
useNavigationEndpointsStore,
} from "./useNavigationEndpoints";
import useNavigationInfo from "./useNavigationInfo";
import useNavigationProgress from "./useNavigationProgress";
import { Coordinate, TRANSPORT_MODE_API_MAP } from "../type";
const OFF_ROUTE_THRESHOLD_METERS = 50;
const REROUTE_COOLDOWN_MS = 15000;
const OFF_ROUTE_CONFIRMATION_COUNT = 3;
const OFF_ROUTE_CHECK_INTERVAL_MS = 1000;
const decodePolyline = (encoded: string): Coordinate[] => {
return polyline
.decode(encoded)
.map(([lat, lng]) => ({ latitude: lat, longitude: lng }));
};
export default function useRerouting() {
const [isRerouting, setIsRerouting] = useState(false);
const offRouteCountRef = useRef(0);
const reroutingRef = useRef(false);
const lastRerouteTimeRef = useRef<number>(0);
const routeCoordsRef = useRef<Coordinate[]>([]);
const stepStartIndicesRef = useRef<number[]>([]);
const isOffRouteRef = useRef(false);
const navigationSessionRef = useRef(0);
const currentLocation = useLocationStore((s) => s.currentLocation);
const { isNavigating } = useNavigationState();
// Use selectors for stable references
const allOutdoorRoutes = useNavigationConfig((s) => s.allOutdoorRoutes);
const setAllOutdoorRoutes = useNavigationConfig((s) => s.setAllOutdoorRoutes);
const navigationMode = useNavigationConfig((s) => s.navigationMode);
const setOrigin = useNavigationEndpointsStore((s) => s.setOrigin);
const setPathDistance = useNavigationInfo((s) => s.setPathDistance);
const setPathDuration = useNavigationInfo((s) => s.setPathDuration);
const setIsLoading = useNavigationInfo((s) => s.setIsLoading);
const resetProgress = useNavigationProgress((s) => s.resetProgress);
useEffect(() => {
if (!allOutdoorRoutes?.length) {
routeCoordsRef.current = [];
stepStartIndicesRef.current = [];
return;
}
const apiMode = TRANSPORT_MODE_API_MAP[navigationMode];
const route = allOutdoorRoutes.find(
(r) => r.transportMode?.toLowerCase() === apiMode?.toLowerCase(),
);
if (!route) {
routeCoordsRef.current = [];
stepStartIndicesRef.current = [];
return;
}
if (route.steps?.length) {
const coords: Coordinate[] = [];
const starts: number[] = [];
for (const step of route.steps) {
starts.push(coords.length);
coords.push(...decodePolyline(step.polyline));
}
routeCoordsRef.current = coords;
stepStartIndicesRef.current = starts;
} else if (route.polyline) {
routeCoordsRef.current = decodePolyline(route.polyline);
stepStartIndicesRef.current = [0];
} else E{
routeCoordsRef.current = [];
stepStartIndicesRef.current = [];
}
}, [allOutdoorRoutes, navigationMode]);
const triggerReroute = useCallback(async () => {
Iif (reroutingRef.current) return;
const location = useLocationStore.getState().currentLocation;
const dest = useNavigationEndpointsStore.getState().destination;
if (!location || !dest) {
isOffRouteRef.current = false;
offRouteCountRef.current = 0;
return;
}
const now = Date.now();
if (now - lastRerouteTimeRef.current < REROUTE_COOLDOWN_MS) {
isOffRouteRef.current = false;
offRouteCountRef.current = 0;
return;
}
const sessionAtStart = navigationSessionRef.current;
reroutingRef.current = true;
setIsRerouting(true);
setIsLoading(true);
try {
const newOrigin: LabeledCoordinate = {
latitude: location.latitude,
longitude: location.longitude,
label: "Current Location",
};
Iif (navigationSessionRef.current !== sessionAtStart) return;
setOrigin(newOrigin);
const routes = await getAllOutdoorDirectionsInfo(newOrigin, dest);
Iif (navigationSessionRef.current !== sessionAtStart) return;
setAllOutdoorRoutes(routes);
const mode = useNavigationConfig.getState().navigationMode;
const activeRoute =
routes.find(
(r) =>
r.transportMode?.toLowerCase() ===
TRANSPORT_MODE_API_MAP[mode]?.toLowerCase(),
) || routes[0];
Eif (activeRoute) {
setPathDistance(activeRoute.distance);
setPathDuration(activeRoute.duration);
}
lastRerouteTimeRef.current = Date.now();
resetProgress();
} catch (error) {
console.error("[Rerouting] Reroute failed:", error);
} finally {
reroutingRef.current = false;
isOffRouteRef.current = false;
offRouteCountRef.current = 0;
setIsRerouting(false);
setIsLoading(false);
}
}, [
setOrigin,
setAllOutdoorRoutes,
setPathDistance,
setPathDuration,
setIsLoading,
resetProgress,
]);
const evaluateOffRoute = useCallback(
(location: Coordinate | null) => {
if (!isNavigating || !location) {
offRouteCountRef.current = 0;
isOffRouteRef.current = false;
return;
}
if (routeCoordsRef.current.length === 0 || reroutingRef.current) return;
const stepIdx = useNavigationProgress.getState().currentStepIndex;
const startAt = stepStartIndicesRef.current[stepIdx] ?? 0;
const remainingCoords = routeCoordsRef.current.slice(startAt);
Iif (remainingCoords.length === 0) return;
const distance = getDistanceToPolyline(location, remainingCoords);
if (distance > OFF_ROUTE_THRESHOLD_METERS) {
offRouteCountRef.current += 1;
if (
offRouteCountRef.current >= OFF_ROUTE_CONFIRMATION_COUNT &&
!isOffRouteRef.current
) {
isOffRouteRef.current = true;
triggerReroute();
}
} else {
offRouteCountRef.current = 0;
isOffRouteRef.current = false;
}
},
[isNavigating, triggerReroute],
);
useEffect(() => {
evaluateOffRoute(currentLocation);
}, [currentLocation, evaluateOffRoute]);
useEffect(() => {
if (!isNavigating) return;
const interval = setInterval(() => {
evaluateOffRoute(useLocationStore.getState().currentLocation);
}, OFF_ROUTE_CHECK_INTERVAL_MS);
return () => clearInterval(interval);
}, [isNavigating, evaluateOffRoute]);
useEffect(() => {
if (!isNavigating) {
navigationSessionRef.current += 1;
isOffRouteRef.current = false;
offRouteCountRef.current = 0;
Iif (reroutingRef.current) {
reroutingRef.current = false;
setIsRerouting(false);
}
}
}, [isNavigating]);
return { isRerouting };
}
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