import sh from 'shelljs';
import fs from 'fs';
import path, { dirname }  from 'path';
import { fileURLToPath } from 'url';

const force = process.env.FORCE_UPDATE === 'true';

const __dirname = dirname(fileURLToPath(import.meta.url));
sh.cd(path.join(__dirname, '..'));

const outputFile = 'static/svelte-app.json';
if (!force && fs.existsSync(outputFile)) {
	console.info(`[update/template] ${outputFile} exists. Skipping`);
	process.exit(0);
}

// fetch svelte app
sh.rm('-rf','scripts/svelte-app');
sh.exec('npx degit sveltejs/template scripts/svelte-app');

// remove src (will be recreated client-side) and node_modules
sh.rm('-rf', 'scripts/svelte-app/src');
sh.rm('-rf', 'scripts/svelte-app/node_modules');

// build svelte-app.json
const appPath = 'scripts/svelte-app';
const files = [];

for (const path of sh.find(appPath).filter(p => fs.lstatSync(p).isFile()) ) {
	const bytes = fs.readFileSync(path);
	const string = bytes.toString();
	const data = bytes.compare(Buffer.from(string)) === 0 ? string : [...bytes];
	files.push({ path: path.slice(appPath.length + 1), data });
}

fs.writeFileSync(outputFile, JSON.stringify(files));