#!/usr/bin/python
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
"""
Updates the subproject path of the CordovaFramework entry to point to this script's version of Cordova.

Usage: CordovaVersion/bin/update_cordova_subproject path/to/your/app.xcodeproj [path/to/CordovaFramework.xcodeproj]
"""

import fileinput
import os
import re
import sys
from posixpath import curdir, sep, pardir, join, abspath, commonprefix

def Usage():
  print __doc__
  sys.exit(1)

def AbsParentPath(path):
  return os.path.abspath(os.path.join(path, os.path.pardir))

def AbsFrameworkPath(argv0):
  script_path = argv0
  # This can happen if the script's dir is in the user's PATH
  if not os.path.exists(script_path):
    raise Exception('Could not locale framework directory.')
  return AbsParentPath(AbsParentPath(script_path))

def AbsProjectPath(relative_path):
  # Do an extra abspath here to strip off trailing / if present.
  project_path = os.path.abspath(relative_path)
  if project_path.endswith('.pbxproj'):
    project_path = AbsParentPath(project_path)
  elif project_path.endswith('.xcodeproj'):
    pass
  else:
    raise Exception('The following is not a valid path to an Xcode project: %s' % project_path)
  return project_path

def relpath(path, start=curdir):
  # it would be nice to use os.path.relpath, 
  # but that leaves out those with python < v2.6
  if not path:
    raise ValueError("no path specified")
  start_list = abspath(start).split(sep)
  path_list = abspath(path).split(sep)
  # Work out how much of the filepath is shared by start and path.
  i = len(commonprefix([start_list, path_list]))
  rel_list = [pardir] * (len(start_list)-i) + path_list[i:]
  if not rel_list:
    return curdir
  return join(*rel_list)


def main(argv):
  if len(argv) < 2 or len(argv) > 3:
    Usage()

  project_path = AbsProjectPath(argv[1])
  if len(argv) < 3:
    framework_path = AbsFrameworkPath(argv[0])
    cordova_lib_xcode_path = os.path.join(framework_path, 'CordovaFramework', 'CordovaFramework.xcodeproj')
  else:
    cordova_lib_xcode_path = AbsProjectPath(argv[2])

  parent_project_path = AbsParentPath(project_path)
  subproject_path = relpath(cordova_lib_xcode_path, parent_project_path)

  # /* CordovaLib.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; path = CordovaFramework.xcodeproj; sourceTree = "<group>"; };
  REGEX = re.compile(r'(.+PBXFileReference.+wrapper.pb-project.+)(path = .+?;)(.*)(sourceTree.+;)(.+)')

  file_handle = fileinput.input(os.path.join(project_path, 'project.pbxproj'), inplace=1)
  found = False
  for line in file_handle:
    if 'CordovaFramework.xcodeproj' in line:
      m = REGEX.match(line)
      if m:
        found = True
        line = m.expand(r'\1path = "%s";\3sourceTree = "<group>";\5\n') % subproject_path
        if 'name =' not in line:
            line = line.replace('path = ', 'name = CordovaFramework.xcodeproj; path = ')
    print line,
  file_handle.close()

  if not found:
    raise Exception('Sub-project entry not found in project file.')
  print('CordovaFramework set to path: %s' % subproject_path)


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