import { register } from "node:module";
import { dirname, join, normalize } from "node:path";
import { fileURLToPath, pathToFileURL } from "node:url";
import { MessageChannel } from "node:worker_threads";
import { CHILD_PROCESS_MESSAGES } from "../constants.js";
import { uniqID } from "../utils/index.js";

export const { port1, port2 } = new MessageChannel();

const __dirname = dirname(fileURLToPath(import.meta.url));

const apiURL = pathToFileURL(normalize(join(__dirname, "..", "exposed", "max-api.js"))).href;
const runnerURL = pathToFileURL(normalize(join(__dirname, "..", "nsRunner.js"))).href;

port1.on("message", (url) => {
	// every file we load gets registered here as a url so we can decide whether to consider it
	// as part of file watching

	// Node-internals are not considered
	if (!url || !url.startsWith("file://")) return;

	// Max API import and the nsRunner itself are not considered
	if (url === apiURL || url === runnerURL) return;

	const fPath = fileURLToPath(url);
	// console.log("loaded", fPath);

	process.send({
		type: CHILD_PROCESS_MESSAGES.WATCH_PATH,
		id: uniqID(),
		payload: {
			filePath: fPath
		}
	});
});

register("./nsLoader.mjs", {
	parentURL: import.meta.url,
	data: {
		apiURL,
		port: port2
	},
	transferList: [port2]
});