"use strict";

const Promise = require("bluebird");
const WebFinger = require("webfinger.js");
const url = require("url");

let webfinger = Promise.promisifyAll(new WebFinger());

module.exports = function lookupUser(address) {
	return Promise.try(() => {
		return webfinger.lookupAsync(address);
	}).then((response) => {
		let aliasCount = response?.object?.aliases?.length;

		if (aliasCount == null || aliasCount === 0) {
			return {};
		} else {
			let { hostname, port } = url.parse(response.object.aliases[0]);

			return {
				aliases: response.object.aliases,
				hostname: hostname,
				apiURL: url.format({
					protocol: "https",
					slashes: true,
					hostname: hostname,
					port: port,
					pathname: "/api/v1/instance"
				})
			};
		}
	}).catch((error) => {
		console.log({error});
		return {};
	});
};