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import maplibregl from "maplibre-gl";
import React, { useEffect, useMemo, useRef, useState } from "react";
import Map, { Marker, NavigationControl, type MapRef } from "react-map-gl/maplibre";
import { useApp } from "~/AppContext";
import { getLineColor } from "~/data/LineColors";
import type { RegionId } from "~/data/RegionConfig";
import type { Stop } from "~/data/StopDataProvider";
import { loadStyle } from "~/maps/styleloader";
import "./StopMapSheet.css";
export interface Position {
latitude: number;
longitude: number;
orientationDegrees: number;
}
export interface ConsolidatedCirculationForMap {
line: string;
route: string;
currentPosition?: Position;
}
interface StopMapProps {
stop: Stop;
circulations: ConsolidatedCirculationForMap[];
region: RegionId;
}
export const StopMap: React.FC<StopMapProps> = ({
stop,
circulations,
region,
}) => {
const { theme } = useApp();
const [styleSpec, setStyleSpec] = useState<any | null>(null);
const mapRef = useRef<MapRef | null>(null);
const hasFitBounds = useRef(false);
useEffect(() => {
let mounted = true;
loadStyle("openfreemap", theme)
.then((style) => {
if (mounted) setStyleSpec(style);
})
.catch((err) => console.error("Failed to load map style", err));
return () => {
mounted = false;
};
}, [theme]);
const center = useMemo(() => {
if (stop.latitude && stop.longitude) {
return { latitude: stop.latitude, longitude: stop.longitude };
}
// fallback to first available bus position
const pos = circulations.find((c) => c.currentPosition)?.currentPosition;
return pos
? { latitude: pos.latitude, longitude: pos.longitude }
: { latitude: 42.2406, longitude: -8.7207 }; // Vigo approx fallback
}, [stop.latitude, stop.longitude, circulations]);
const busPositions = useMemo(
() => circulations.filter((c) => !!c.currentPosition),
[circulations],
);
// Fit bounds to stop + buses, with ~1km padding each side, with a modest animation
// Only fit bounds on the first load, not on subsequent updates
useEffect(() => {
if (!styleSpec || !mapRef.current || hasFitBounds.current) return;
const points: { lat: number; lon: number }[] = [];
if (stop.latitude && stop.longitude) {
points.push({ lat: stop.latitude, lon: stop.longitude });
}
for (const c of busPositions) {
if (c.currentPosition) {
points.push({
lat: c.currentPosition.latitude,
lon: c.currentPosition.longitude,
});
}
}
if (points.length === 0) return;
let minLat = points[0].lat,
maxLat = points[0].lat,
minLon = points[0].lon,
maxLon = points[0].lon;
for (const p of points) {
if (p.lat < minLat) minLat = p.lat;
if (p.lat > maxLat) maxLat = p.lat;
if (p.lon < minLon) minLon = p.lon;
if (p.lon > maxLon) maxLon = p.lon;
}
// ~1km in degrees
const kmToDegLat = 1.0 / 111.32; // ≈0.008983
const centerLat = (minLat + maxLat) / 2;
const kmToDegLon = kmToDegLat / Math.max(Math.cos((centerLat * Math.PI) / 180), 0.1);
const padLat = kmToDegLat;
const padLon = kmToDegLon;
const sw = [minLon - padLon, minLat - padLat] as [number, number];
const ne = [maxLon + padLon, maxLat + padLat] as [number, number];
const bounds = new maplibregl.LngLatBounds(sw, ne);
try {
mapRef.current.fitBounds(bounds, {
padding: 32,
duration: 700,
maxZoom: 17,
} as any);
hasFitBounds.current = true;
} catch {}
}, [styleSpec, stop.latitude, stop.longitude, busPositions]);
return (
<div className="stop-map-container">
{styleSpec && (
<Map
mapLib={maplibregl as any}
initialViewState={{
latitude: center.latitude,
longitude: center.longitude,
zoom: 16,
}}
style={{ width: "100%", height: "100%" }}
mapStyle={styleSpec}
attributionControl={false}
ref={mapRef}
>
<NavigationControl position="top-left" />
{/* Stop marker (center) */}
{stop.latitude && stop.longitude && (
<Marker
longitude={stop.longitude}
latitude={stop.latitude}
anchor="bottom"
>
<div
style={{
width: 14,
height: 14,
background: "#1976d2",
border: "2px solid white",
borderRadius: "50%",
boxShadow: "0 0 0 2px rgba(0,0,0,0.2)",
}}
title={`Stop ${stop.stopId}`}
/>
</Marker>
)}
{/* Bus markers with heading */}
{busPositions.map((c, idx) => {
const p = c.currentPosition!;
const lineColor = getLineColor(region, c.line);
return (
<Marker
key={idx}
longitude={p.longitude}
latitude={p.latitude}
anchor="center"
>
<div
title={`${c.line} → ${c.route}`}
style={{
display: "flex",
flexDirection: "column",
alignItems: "center",
gap: 2,
transform: `rotate(${p.orientationDegrees}deg)`,
transformOrigin: "center center",
}}
>
{/* Line number above */}
<div
style={{
background: lineColor.background,
color: lineColor.text,
padding: "2px 4px",
borderRadius: 4,
fontSize: 10,
fontWeight: 700,
lineHeight: 1,
border: "1px solid #fff",
boxShadow: "0 1px 2px rgba(0,0,0,0.3)",
}}
>
{c.line}
</div>
{/* Arrow pointing direction */}
<svg
width="20"
height="20"
viewBox="0 0 24 24"
style={{
filter: "drop-shadow(0 1px 2px rgba(0,0,0,0.3))",
}}
>
<path
d="M12 2 L20 22 L12 18 L4 22 Z"
fill={lineColor.background}
stroke="#fff"
strokeWidth="1.5"
/>
</svg>
</div>
</Marker>
);
})}
</Map>
)}
</div>
);
};
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