/**
 * Copyright 2018-present Facebook.
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 * @format
 */

const fs = require('fs');
const path = require('path');
const lineReplace = require('line-replace');
const yazl = require('yazl');
const {exec: createBinary} = require('pkg');
const {
  buildFolder,
  compile,
  compileDefaultPlugins,
  getVersionNumber,
} = require('./build-utils.js');

const PLUGINS_FOLDER_NAME = 'plugins';

function preludeBundle(dir, versionNumber) {
  return new Promise((resolve, reject) =>
    lineReplace({
      file: path.join(dir, 'bundle.js'),
      line: 1,
      text: `var __DEV__=false; global.electronRequire = require; global.performance = require("perf_hooks").performance;global.__VERSION__="${versionNumber}";`,
      addNewLine: true,
      callback: resolve,
    }),
  );
}

async function createZip(buildDir, distDir, targets) {
  return Promise.all(
    targets.map(
      target =>
        new Promise((resolve, reject) => {
          const zip = new yazl.ZipFile();
          const binary = `flipper-${target === 'mac' ? 'macos' : target}`;
          zip.addFile(path.join(buildDir, binary), binary);
          const pluginDir = path.join(buildDir, PLUGINS_FOLDER_NAME);
          fs.readdirSync(pluginDir).forEach(file => {
            zip.addFile(
              path.join(pluginDir, file),
              path.join(PLUGINS_FOLDER_NAME, file),
            );
          });
          zip.outputStream
            .pipe(
              fs.createWriteStream(
                path.join(distDir, `Flipper-headless-${target}.zip`),
              ),
            )
            .on('close', resolve);
          zip.end();
        }),
    ),
  );
}

(async () => {
  const targets = {};
  let platformPostfix;

  if (process.argv.indexOf('--mac') > -1) {
    targets.mac = 'node10-macos-x64';
    platformPostfix = '-macos';
  }
  if (process.argv.indexOf('--linux') > -1) {
    targets.linux = 'node10-linux-x64';
    platformPostfix = '-linux';
  }
  if (process.argv.indexOf('--win') > -1) {
    targets.win = 'node10-win-x64';
    platformPostfix = '-win';
  }
  if (targets.length === 0) {
    throw new Error('No targets specified. eg. --mac, --win, or --linux');
  } else if (Object.keys(targets).length > 1) {
    // platformPostfix is automatically added by pkg
    platformPostfix = '';
  }

  process.env.BUILD_HEADLESS = 'true';
  const buildDir = await buildFolder();
  const distDir = path.join(__dirname, '..', 'dist');
  // eslint-disable-next-line no-console
  console.log('Created build directory', buildDir);
  await compile(buildDir, path.join(__dirname, '..', 'headless', 'index.js'));
  const versionNumber = getVersionNumber();
  await preludeBundle(buildDir, versionNumber);
  await compileDefaultPlugins(path.join(buildDir, PLUGINS_FOLDER_NAME));
  await createBinary([
    path.join(buildDir, 'bundle.js'),
    '--output',
    path.join(buildDir, `flipper${platformPostfix}`),
    '--targets',
    Object.values(targets).join(','),
    '--debug',
  ]);
  await createZip(buildDir, distDir, Object.keys(targets));
  // eslint-disable-next-line no-console
  console.log('✨  Done');
  process.exit();
})();