#!/usr/bin/env node
(async function() {
	'use strict';

	var UglifyJS = require('uglify-js');
	var path = require('path');
	var fs = require('fs');
	var promisify = require('util').promisify;
	var readFile = promisify(fs.readFile);
	var writeFile = promisify(fs.writeFile);
	var gzip = promisify(require('zlib').gzip);
	var name = require('../package.json').name;

	// The order is specific, and it matters
	var files = await Promise.all(
		['../unibabel.js', '../hex.js', '../base32.js'].map(
			async function(file) {
				return (await readFile(
					path.join(__dirname, file),
					'utf8'
				)).trim();
			}
		)
	);

	var license =
		[
			'// Unibabel Copyright 2015-2019 AJ ONeal. All rights reserved.',
			'/* License at http://mozilla.org/MPL/2.0/ */',
			'// Thirty-Two Copyright (c) 2011, Chris Umbel. All rights reserved.',
			'/* License at https://github.com/chrisumbel/thirty-two */'
		].join('\n') + '\n';
	var header = ['var Unibabel = {};', ';(function () {'].join('\n') + '\n';
	var footer = ['}());'].join('\n') + '\n';

	var file = (
		(license + header + files.join('\n') + '\n' + footer).trim() + '\n'
	)
		.replace(/\bmodule.exports\b/g, 'Unibabel')
		.replace(/\bexports\b/g, 'Unibabel');
	await writeFile(path.join(__dirname, '../dist', name + '.all.js'), file);
	await writeFile(
		path.join(__dirname, '../dist', name + '.all.js.gz'),
		await gzip(file)
	);

	// TODO source maps?
	var result = UglifyJS.minify(file, {
		compress: true,
		// mangling doesn't save significant
		mangle: false
	});
	if (result.error) {
		throw result.error;
	}
	file = license + result.code;
	await writeFile(path.join(__dirname, '../dist', name + '.all.min.js'), file);
	await writeFile(
		path.join(__dirname, '../dist', name + '.all.min.js.gz'),
		await gzip(file)
	);
})();