"use strict";

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

const _require = require('child_process'),
      execSync = _require.execSync;

const OSX_CHROME = 'google chrome';
const Actions = Object.freeze({
  NONE: 0,
  BROWSER: 1
});

const getBrowserEnv = () => {
  // Attempt to honor this environment variable.
  // It is specific to the operating system.
  // See https://github.com/sindresorhus/opn#app for documentation.
  const value = process.env.BROWSER;
  let action;

  if (!value) {
    // Default.
    action = Actions.BROWSER;
  } else if (value.toLowerCase() === 'none') {
    action = Actions.NONE;
  } else {
    action = Actions.BROWSER;
  }

  return {
    action,
    value
  };
}; // Copy from
// https://github.com/facebook/create-react-app/blob/master/packages/react-dev-utils/openBrowser.js#L64


const startBrowserProcess = function startBrowserProcess(browser, url) {
  let opts = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  // If we're on OS X, the user hasn't specifically
  // requested a different browser, we can try opening
  // Chrome with AppleScript. This lets us reuse an
  // existing tab when possible instead of creating a new one.
  const shouldTryOpenChromeWithAppleScript = process.platform === 'darwin' && (typeof browser !== 'string' || browser === OSX_CHROME);

  if (shouldTryOpenChromeWithAppleScript) {
    try {
      // Try our best to reuse existing tab
      // on OS X Google Chrome with AppleScript
      execSync('ps cax | grep "Google Chrome"');
      execSync(`osascript ../openChrome.applescript "${encodeURI(url)}"`, {
        cwd: __dirname,
        stdio: 'ignore'
      });
      return Promise.resolve(true);
    } catch (err) {// Ignore errors.
      // It it breaks, it will fallback to `opn` anyway
    }
  } // Another special case: on OS X, check if BROWSER has been set to "open".
  // In this case, instead of passing `open` to `opn` (which won't work),
  // just ignore it (thus ensuring the intended behavior, i.e. opening the system browser):
  // https://github.com/facebook/create-react-app/pull/1690#issuecomment-283518768


  if (process.platform === 'darwin' && browser === 'open') {
    browser = undefined;
  } // Fallback to opn
  // (It will always open new tab)


  const options = _objectSpread({
    app: browser
  }, opts);

  console.debug(options);
  return require('opn')(url, options);
};

module.exports = (target, opts) => {
  const _getBrowserEnv = getBrowserEnv(),
        action = _getBrowserEnv.action,
        value = _getBrowserEnv.value;

  switch (action) {
    case Actions.NONE:
      // Special case: BROWSER="none" will prevent opening completely.
      return false;

    case Actions.BROWSER:
      return startBrowserProcess(value, target, opts);

    default:
      throw new Error('Not implemented.');
  }
};