import * as fs from 'fs-extra';
import * as path from 'path';
import browserify from 'browserify';

import {BUILD_FOLDER_PATH, SRC_FOLDER_PATH, TS_BUILD_FOLDER_PATH} from '../../env';

const UI_FOLDER_PATH = path.join(SRC_FOLDER_PATH, 'webviews', 'ui');
const UI_JS_FOLDER_PATH = path.join(TS_BUILD_FOLDER_PATH, 'src', 'webviews', 'ui');
const UI_FOLDER_BUILD_PATH = path.join(BUILD_FOLDER_PATH, 'ui');

const copyStatics = async (): Promise<void[]> => {
  const paths = [{
    src: path.join(UI_FOLDER_PATH, 'release-notes', 'release-notes.html'),
    dest: path.join(UI_FOLDER_BUILD_PATH, 'release-notes.html')
  }, {
    src: path.join(UI_FOLDER_PATH, 'release-notes', 'style.css'),
    dest: path.join(UI_FOLDER_BUILD_PATH, 'style.css')
  }];

  return Promise.all(paths.map(async path => fs.copyFile(path.src, path.dest)));
};

const buildJs = async (type: 'release-notes'): Promise<void> => {
  const jsBuildPath = path.join(UI_FOLDER_BUILD_PATH, `${type}.js`);
  const b = browserify();
  await fs.createFile(jsBuildPath);
  const jsBuildFileStream = fs.createWriteStream(jsBuildPath);
  b.add(path.join(UI_JS_FOLDER_PATH, type, 'index.js'));
  b.bundle().pipe(jsBuildFileStream);
  return Promise.resolve();
};

const run = async (): Promise<void> => {
  try {
    await fs.mkdirp(UI_FOLDER_BUILD_PATH);
    await copyStatics();
    await buildJs('release-notes');
  } catch (error) {
    console.error('ERROR build:ui:', error);
    process.exit(1);
  }
};

run();