/**
 *  @flow
 */

import mkdirp from 'mkdirp';
import path from 'path';

import { spawnAsyncThrowError } from './ExponentTools';
import * as IosIcons from './IosIcons';
import StandaloneContext from './StandaloneContext';

/**
 *  Compile a .car file from the icons in a manifest.
 */
async function buildAssetArchiveAsync(
  context: StandaloneContext,
  destinationCARPath: string,
  intermediatesDirectory: string
) {
  if (context.type !== 'service') {
    throw new Error('buildAssetArchive is only supported for service standalone contexts.');
  }
  mkdirp.sync(intermediatesDirectory);

  // copy expoSourceRoot/.../Images.xcassets into intermediates
  await spawnAsyncThrowError(
    '/bin/cp',
    [
      '-R',
      path.join(context.data.expoSourcePath, 'Exponent', 'Images.xcassets'),
      path.join(intermediatesDirectory, 'Images.xcassets'),
    ],
    {
      stdio: 'inherit',
    }
  );

  // make the new xcassets contain the project's icon
  await IosIcons.createAndWriteIconsToPathAsync(
    context,
    path.join(intermediatesDirectory, 'Images.xcassets', 'AppIcon.appiconset')
  );

  // compile asset archive
  let xcrunargs = [].concat(
    ['actool'],
    ['--minimum-deployment-target', '9.0'],
    ['--platform', 'iphoneos'],
    ['--app-icon', 'AppIcon'],
    ['--output-partial-info-plist', 'assetcatalog_generated_info.plist'],
    ['--compress-pngs'],
    ['--enable-on-demand-resources', 'YES'],
    ['--product-type', 'com.apple.product-type.application'],
    ['--target-device', 'iphone'],
    ['--target-device', 'ipad'],
    ['--compile', path.relative(intermediatesDirectory, destinationCARPath)],
    ['Images.xcassets']
  );
  /*
   *  Note: if you want to debug issues with `actool`, try changing to stdio: 'inherit'.
   *  In both success and failure cases, actool will write an enormous .plist to stdout
   *  which may contain the key `com.apple.actool.errors`. Great work Apple
   */
  await spawnAsyncThrowError('xcrun', xcrunargs, {
    stdio: ['ignore', 'ignore', 'inherit'], // only stderr
    cwd: intermediatesDirectory,
  });

  return;
}

export { buildAssetArchiveAsync };