#!/usr/bin/env node
"use strict";

try {
	// technically this was introduced in Node 11, but we'll ask for the most recent LTS with it to be safe
	[].flatMap(x => x);
} catch (e) {
	console.log("We require Node.js version 12 or later; you're using " + process.version);
	process.exit(1);
}

var child_process = require('child_process');
var fs = require('fs');
var force = process.argv[2] === '--force';

process.chdir(__dirname);

function shell(cmd) {
	child_process.execSync(cmd, {stdio: 'inherit'});
}

// Check to make sure the most recently added or updated dependency is installed at the correct version
try {
	var sucraseVersion = require('sucrase').getVersion().split('.');
	if (
		parseInt(sucraseVersion[0]) < 3 ||
		(parseInt(sucraseVersion[0]) === 3 && parseInt(sucraseVersion[1]) < 15)
	) {
		throw new Error("Sucrase version too old");
	}
	require('./tools/build-utils').transpile(force);
} catch (e) {
	console.log('Installing dependencies...');
	shell('npm install --production');
	// for some reason, sucrase won't be requirable until a tick has passed
	// see https://stackoverflow.com/questions/53270058/node-cant-find-certain-modules-after-synchronous-install
	setImmediate(() => {
		require('./tools/build-utils').transpile(true);
	});
}

// Make sure config.js exists. If not, copy it over synchronously from
// config-example.js, since it's needed before we can start the server
try {
	require.resolve('./config/config');
} catch (err) {
	if (err.code !== 'MODULE_NOT_FOUND') throw err; // should never happen

	console.log('config.js does not exist. Creating one with default settings...');
	fs.writeFileSync(
		'config/config.js',
		fs.readFileSync('config/config-example.js')
	);
}