'use strict'

const dedent = require('dedent')
const yargs = require('yargs')
const {app} = require('electron')

module.exports = function parseCommandLine (processArgs) {
  const options = yargs(processArgs).wrap(yargs.terminalWidth())
  const version = app.getVersion()
  options.usage(
    dedent`Atom Editor v${version}

    Usage:
      atom
      atom [options] [path ...]
      atom file[:line[:column]]

    If no arguments are given and no Atom windows are already open, restore all windows
    from the previous editing session. Use "atom --new-window" to open a single empty
    Atom window instead.

    If no arguments are given and at least one Atom window is open, open a new, empty
    Atom window.

    One or more paths to files or folders may be specified. All paths will be opened
    in a new Atom window. Each file may be opened at the desired line (and optionally
    column) by appending the numbers after the file name, e.g. \`atom file:5:8\`.

    Paths that start with \`atom://\` will be interpreted as URLs.

    Environment Variables:

      ATOM_DEV_RESOURCE_PATH  The path from which Atom loads source code in dev mode.
                              Defaults to \`~/github/atom\`.

      ATOM_HOME               The root path for all configuration files and folders.
                              Defaults to \`~/.atom\`.`
  )
  // Deprecated 1.0 API preview flag
  options.alias('1', 'one').boolean('1').describe('1', 'This option is no longer supported.')
  options.boolean('include-deprecated-apis').describe('include-deprecated-apis', 'This option is not currently supported.')
  options.alias('d', 'dev').boolean('d').describe('d', 'Run in development mode.')
  options.alias('f', 'foreground').boolean('f').describe('f', 'Keep the main process in the foreground.')
  options.alias('h', 'help').boolean('h').describe('h', 'Print this usage message.')
  options.alias('l', 'log-file').string('l').describe('l', 'Log all output to file.')
  options.alias('n', 'new-window').boolean('n').describe('n', 'Launch an empty Atom window instead of restoring previous session.')
  options.boolean('profile-startup').describe('profile-startup', 'Create a profile of the startup execution time.')
  options.alias('r', 'resource-path').string('r').describe('r', 'Set the path to the Atom source directory and enable dev-mode.')
  options.boolean('safe').describe(
    'safe',
    'Do not load packages from ~/.atom/packages or ~/.atom/dev/packages.'
  )
  options.boolean('benchmark').describe('benchmark', 'Open a new window that runs the specified benchmarks.')
  options.boolean('benchmark-test').describe('benchmark-test', 'Run a faster version of the benchmarks in headless mode.')
  options.alias('t', 'test').boolean('t').describe('t', 'Run the specified specs and exit with error code on failures.')
  options.alias('m', 'main-process').boolean('m').describe('m', 'Run the specified specs in the main process.')
  options.string('timeout').describe(
    'timeout',
    'When in test mode, waits until the specified time (in minutes) and kills the process (exit code: 130).'
  )
  options.alias('v', 'version').boolean('v').describe('v', 'Print the version information.')
  options.alias('w', 'wait').boolean('w').describe('w', 'Wait for window to be closed before returning.')
  options.alias('a', 'add').boolean('a').describe('add', 'Open path as a new project in last used window.')
  options.string('socket-path')
  options.string('user-data-dir')
  options.boolean('clear-window-state').describe('clear-window-state', 'Delete all Atom environment state.')
  options.boolean('enable-electron-logging').describe('enable-electron-logging', 'Enable low-level logging messages from Electron.')
  options.boolean('uri-handler')

  let args = options.argv

  // If --uri-handler is set, then we parse NOTHING else
  if (args.uriHandler) {
    args = {
      uriHandler: true,
      'uri-handler': true,
      _: args._.filter(str => str.startsWith('atom://')).slice(0, 1)
    }
  }

  if (args.help) {
    process.stdout.write(options.help())
    process.exit(0)
  }

  if (args.version) {
    process.stdout.write(
      `Atom    : ${app.getVersion()}\n` +
      `Electron: ${process.versions.electron}\n` +
      `Chrome  : ${process.versions.chrome}\n` +
      `Node    : ${process.versions.node}\n`
    )
    process.exit(0)
  }

  const addToLastWindow = args['add']
  const safeMode = args['safe']
  const benchmark = args['benchmark']
  const benchmarkTest = args['benchmark-test']
  const test = args['test']
  const mainProcess = args['main-process']
  const timeout = args['timeout']
  const newWindow = args['new-window']
  let executedFrom = null
  if (args['executed-from'] && args['executed-from'].toString()) {
    executedFrom = args['executed-from'].toString()
  } else {
    executedFrom = process.cwd()
  }

  let pidToKillWhenClosed = null
  if (args['wait']) {
    pidToKillWhenClosed = args['pid']
  }

  const logFile = args['log-file']
  const socketPath = args['socket-path']
  const userDataDir = args['user-data-dir']
  const profileStartup = args['profile-startup']
  const clearWindowState = args['clear-window-state']
  let pathsToOpen = []
  let urlsToOpen = []
  let devMode = args['dev']

  for (const path of args._) {
    if (path.startsWith('atom://')) {
      urlsToOpen.push(path)
    } else {
      pathsToOpen.push(path)
    }
  }

  if (args.resourcePath || test) {
    devMode = true
  }

  if (args['path-environment']) {
    // On Yosemite the $PATH is not inherited by the "open" command, so we have to
    // explicitly pass it by command line, see http://git.io/YC8_Ew.
    process.env.PATH = args['path-environment']
  }

  return {
    pathsToOpen,
    urlsToOpen,
    executedFrom,
    test,
    version,
    pidToKillWhenClosed,
    devMode,
    safeMode,
    newWindow,
    logFile,
    socketPath,
    userDataDir,
    profileStartup,
    timeout,
    clearWindowState,
    addToLastWindow,
    mainProcess,
    benchmark,
    benchmarkTest,
    env: process.env
  }
}