/** @type {import("node-fetch").default} */
// @ts-ignore
const fetch = require("node-fetch")

async function request(url, options = {}) {
	if (!options.headers) options.headers = {}
	options.headers = {
		"user-agent": "CloudTubeBackend/1.0"
	}
	const res = await fetch(url, options)

	if (res.status >= 400) {
		if (res.status == 500) {
			let body = await res.text();

			const traceback_start = '<pre id="traceback">';
			const traceback_end = '</pre>';

			const si = body.indexOf(traceback_start)
			if (si >= 0) body = body.slice(si + traceback_start.length);

			const ei = body.indexOf(traceback_end)
			if (ei >= 0) body = body.slice(0, ei);

			throw new Error(`Unexpected error in backend:\n\n${body}`);
		} else {
			throw new Error(`Unexpected response from backend: ${res.status} ${res.statusText}`);
		}
	}
	return res
}

module.exports.request = request