import Cors from "cors";

import fs from "fs";

// Initializing the cors middleware
// You can read more about the available options here: https://github.com/expressjs/cors#configuration-options
const cors = Cors({
	methods: ["POST"],
});

// Helper method to wait for a middleware to execute before continuing
// And to throw an error when an error happens in a middleware
function runMiddleware(req, res, fn) {
	return new Promise((resolve, reject) => {
		fn(req, res, (result) => {
			if (result instanceof Error) {
				return reject(result);
			}

			return resolve(result);
		});
	});
}

export default async function handler(req, res) {
	// Run the middleware
	await runMiddleware(req, res, cors);

	const id = Math.floor(Math.random() * 90000) + 10000;
	const textData = req.body;

	let data = textData.split(",");

	let text = "Próbkowanie: 1\nSegment 0: w dół\nX:	Y,	Z\n";
	let i = 1;
	for (let snippet of data) {
		if (i % 3 != 0) {
			text += snippet + ",";
		} else {
			text += snippet + "\n";
		}
		i += 1;
	}

	// console.log(text);

	fs.writeFile(`externals/${id}.txt`, text, (err) => {
		if (err) {
			res.status(418);
			throw err;
		}
	});

	//	console.log(textData);
	res.status(200).send({ url: `https://test.wastpol.pl/?external=tru&id=${id}` });
}