#!/usr/bin/python
# Copyright 2015 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Invokes grunt build on AppRTC.

The AppRTC javascript code must be closure-compiled. This script uses
the node toolchain we downloaded earlier.
"""

import fileinput
import os
import shutil
import subprocess
import sys

import utils


# Phantomjs generates very deep paths in the node_modules structure and
# Windows can't deal with that, so just hack that out.
def _WorkaroundPhantomJsOnWin(samples_path):
  if utils.GetPlatform() is 'win':
    package_json = os.path.join(samples_path, 'package.json')
    if not os.path.exists(package_json):
      raise Exception('Expected %s to exist.' % os.path.abspath(package_json))

    for line in fileinput.input(package_json, inplace=True):
      if not 'phantomjs' in line:
        sys.stdout.write(line)


def _WorkAroundMacNpmCorruptedDataOnInstall(command):
  print 'Wiping .npm folder and trying again...'
  npm_storage = os.path.expanduser('~/.npm')
  assert npm_storage.endswith('.npm')
  utils.RemoveDirectory(npm_storage)
  utils.RunSubprocessWithRetry(command)


def main():
  node_path = os.path.abspath('node')
  if not os.path.exists(node_path):
    return 'Expected node at %s.' % node_path
  apprtc_path = os.path.join('src', 'out', 'apprtc')
  if not os.path.exists(apprtc_path):
    return 'Expected apprtc at %s.' % os.path.abspath(apprtc_path)

  _WorkaroundPhantomJsOnWin(apprtc_path)
  os.chdir(apprtc_path)

  if utils.GetPlatform() is 'win':
    npm_bin = os.path.join(node_path, 'npm.cmd')
    node_bin = os.path.join(node_path, 'node.exe')
  else:
    npm_bin = os.path.join(node_path, 'bin', 'npm')
    node_bin = os.path.join(node_path, 'bin', 'node')

  command = [npm_bin, 'install']
  try:
    utils.RunSubprocessWithRetry(command)
  except subprocess.CalledProcessError:
    if utils.GetPlatform() is not 'mac':
      raise
    _WorkAroundMacNpmCorruptedDataOnInstall(command)

  local_grunt_bin = os.path.join('node_modules', 'grunt-cli', 'bin', 'grunt')

  if not os.path.exists(local_grunt_bin):
    return ('Missing grunt-cli in the apprtc checkout; did '
            'npm install fail?')

  utils.RunSubprocessWithRetry([node_bin, local_grunt_bin, 'build'])


if __name__ == '__main__':
  sys.exit(main())