/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @flow
 */

'use strict';

/* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an error
 * found when Flow v0.54 was deployed. To see the error delete this comment and
 * run Flow. */
const opn = require('opn');
const execSync = require('child_process').execSync;

function commandExistsUnixSync(commandName, callback) {
  try {
    var stdout = execSync(
      'command -v ' +
        commandName +
        ' 2>/dev/null' +
        " && { echo >&1 '" +
        commandName +
        " found'; exit 0; }",
    );
    return !!stdout;
  } catch (error) {
    return false;
  }
}

function getChromeAppName(): string {
  switch (process.platform) {
    case 'darwin':
      return 'google chrome';
    case 'win32':
      return 'chrome';
    case 'linux':
      if (commandExistsUnixSync('google-chrome')) {
        return 'google-chrome';
      } else if (commandExistsUnixSync('chromium-browser')) {
        return 'chromium-browser';
      } else {
        return 'chromium';
      }
    default:
      return 'google-chrome';
  }
}

function launchChrome(url: string) {
  opn(url, {app: [getChromeAppName()]}, function(err) {
    if (err) {
      console.error('Google Chrome exited with error:', err);
    }
  });
}

module.exports = launchChrome;