import type { RequestHandler } from "./$types";
import { getLines, getStops, type GameData } from "$lib";

export const GET: RequestHandler = async ({ fetch }) => {
	const lines = await getLines(fetch);
	const stops = await getStops(fetch);

	const bbox = lines.bbox ?? [0, 0, 0, 0];
	const centerLat = (bbox[1] + bbox[3]) / 2;
	const centerLon = (bbox[0] + bbox[2]) / 2;

	const lineColors: [GeoJSON.Feature, string][] = lines.features.map((f) => {
		const components = f.properties!.couleur!.split(" ");
		return [f, `rgb(${components.join(",")})`];
	});

	const lineCodes = new Set<string>(lines.features.map((f) => f.properties!.code_ligne));

	const crossingStops = stops.filter((f) => {
		if (f.properties?.desserte) {
			return f.properties.desserte
				.split(",")
				.map((d: string) => d.split(":")[0])
				.some((d: string) => lineCodes.has(d));
		} else {
			return false;
		}
	});

	const randomStop = crossingStops[Math.floor(Math.random() * crossingStops.length)];

	const data: GameData = {
		center: [centerLat, centerLon],
		lines: lineColors,
		stops: crossingStops,
		stopName: randomStop.properties!.nom,
		stopId: randomStop.id!.toString(),
	};

	return Response.json(data);
};