#!/usr/bin/env python

import os
import re
import sys
import argparse

from lib.util import execute, get_electron_version, parse_version, scoped_cwd


SOURCE_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))


def main():

  parser = argparse.ArgumentParser(
    description='Bump version numbers. Must specify at least one of the three'
               +' options:\n'
               +'   --bump=patch to increment patch version, or\n'
               +'   --stable to promote current beta to stable, or\n'
               +'   --version={version} to set version number directly\n'
               +'Note that you can use both --bump and --stable '
               +'simultaneously.',
               formatter_class=argparse.RawTextHelpFormatter
  )
  parser.add_argument(
    '--version',
    default=None,
    dest='new_version',
    help='new version number'
  )
  parser.add_argument(
    '--bump',
    action='store',
    default=None,
    dest='bump',
    help='increment [major | minor | patch | beta]'
  )
  parser.add_argument(
    '--stable',
    action='store_true',
    default= False,
    dest='stable',
    help='promote to stable (i.e. remove `-beta.x` suffix)'
  )
  parser.add_argument(
    '--dry-run',
    action='store_true',
    default= False,
    dest='dry_run',
    help='just to check that version number is correct'
  )

  args = parser.parse_args()

  if args.new_version == None and args.bump == None and args.stable == False:
    parser.print_help()
    return 1

  increments = ['major', 'minor', 'patch', 'beta']

  curr_version = get_electron_version()
  versions = parse_version(re.sub('-beta', '', curr_version))

  if args.bump in increments:
    versions = increase_version(versions, increments.index(args.bump))
    if versions[3] == '0':
      # beta starts at 1
      versions = increase_version(versions, increments.index('beta'))

  if args.stable == True:
    versions[3] = '0'

  if args.new_version != None:
    versions = parse_version(re.sub('-beta', '', args.new_version))

  version = '.'.join(versions[:3])
  suffix = '' if versions[3] == '0' else '-beta.' + versions[3]

  if args.dry_run:
    print 'new version number would be: {0}\n'.format(version + suffix)
    return 0


  with scoped_cwd(SOURCE_ROOT):
    update_electron_gyp(version, suffix)
    update_win_rc(version, versions)
    update_version_h(versions)
    update_info_plist(version)
    update_package_json(version, suffix)
    tag_version(version, suffix)

  print 'Bumped to version: {0}'.format(version + suffix)

def increase_version(versions, index):
  for i in range(index + 1, 4):
    versions[i] = '0'
  versions[index] = str(int(versions[index]) + 1)
  return versions


def update_electron_gyp(version, suffix):
  pattern = re.compile(" *'version%' *: *'[0-9.]+(-beta[0-9.]*)?'")
  with open('electron.gyp', 'r') as f:
    lines = f.readlines()

  for i in range(0, len(lines)):
    if pattern.match(lines[i]):
      lines[i] = "    'version%': '{0}',\n".format(version + suffix)
      with open('electron.gyp', 'w') as f:
        f.write(''.join(lines))
      return


def update_win_rc(version, versions):
  pattern_fv = re.compile(' FILEVERSION [0-9,]+')
  pattern_pv = re.compile(' PRODUCTVERSION [0-9,]+')
  pattern_fvs = re.compile(' *VALUE "FileVersion", "[0-9.]+"')
  pattern_pvs = re.compile(' *VALUE "ProductVersion", "[0-9.]+"')

  win_rc = os.path.join('atom', 'browser', 'resources', 'win', 'atom.rc')
  with open(win_rc, 'r') as f:
    lines = f.readlines()

  versions = [str(v) for v in versions]
  for i in range(0, len(lines)):
    line = lines[i]
    if pattern_fv.match(line):
      lines[i] = ' FILEVERSION {0}\r\n'.format(','.join(versions))
    elif pattern_pv.match(line):
      lines[i] = ' PRODUCTVERSION {0}\r\n'.format(','.join(versions))
    elif pattern_fvs.match(line):
      lines[i] = '            VALUE "FileVersion", "{0}"\r\n'.format(version)
    elif pattern_pvs.match(line):
      lines[i] = '            VALUE "ProductVersion", "{0}"\r\n'.format(version)

  with open(win_rc, 'w') as f:
    f.write(''.join(lines))


def update_version_h(versions):
  version_h = os.path.join('atom', 'common', 'atom_version.h')
  with open(version_h, 'r') as f:
    lines = f.readlines()

  for i in range(0, len(lines)):
    line = lines[i]
    if 'ATOM_MAJOR_VERSION' in line:
      lines[i] = '#define ATOM_MAJOR_VERSION {0}\n'.format(versions[0])
      lines[i + 1] = '#define ATOM_MINOR_VERSION {0}\n'.format(versions[1])
      lines[i + 2] = '#define ATOM_PATCH_VERSION {0}\n'.format(versions[2])

      with open(version_h, 'w') as f:
        f.write(''.join(lines))
      return


def update_info_plist(version):
  info_plist = os.path.join('atom', 'browser', 'resources', 'mac', 'Info.plist')
  with open(info_plist, 'r') as f:
    lines = f.readlines()

  for i in range(0, len(lines)):
    line = lines[i]
    if 'CFBundleVersion' in line:
      lines[i + 1] = '  <string>{0}</string>\n'.format(version)
    if 'CFBundleShortVersionString' in line:
      lines[i + 1] = '  <string>{0}</string>\n'.format(version)

  with open(info_plist, 'w') as f:
    f.write(''.join(lines))


def update_package_json(version, suffix):
  package_json = 'package.json'
  with open(package_json, 'r') as f:
    lines = f.readlines()

  for i in range(0, len(lines)):
    line = lines[i];
    if 'version' in line:
      lines[i] = '  "version": "{0}",\n'.format(version + suffix)
      break

  with open(package_json, 'w') as f:
    f.write(''.join(lines))


def tag_version(version, suffix):
  execute(['git', 'commit', '-a', '-m', 'Bump v{0}'.format(version + suffix)])


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