import { DIST, LIB } from './../locations.js';

import fs from 'fs-extra';
import path from 'path';
import { preprocess as svelte } from 'svelte/compiler';
import { sveltePreprocess } from '../../preprocess/index.js';

const stripLangTags = (source) =>
  source
    .replace(
      /(<!--[^]*?-->)|(<script[^>]*?)\s(?:type|lang)=(["']).*?\3/g,
      '$1$2'
    )
    .replace(
      /(<!--[^]*?-->)|(<style[^>]*?)\s(?:type|lang)=(["']).*?\3/g,
      '$1$2'
    );

export default async (file) => {
  const filename = path.join(LIB, file);
  let source = fs.readFileSync(filename, 'utf8');
  source = (await svelte(source, sveltePreprocess, { filename })).code;
  const writePath = path.join(DIST, file);
  fs.ensureDirSync(path.dirname(writePath));
  fs.writeFileSync(writePath, stripLangTags(source));
};