#!/usr/bin/env python
"""Parse a changelog into trello checklist markdown for SRUs."""

import argparse
import re


def get_parser():
   parser = argparse.ArgumentParser()
   parser.add_argument('-c', '--changelog', required=True, help='Changelog file to parser')
   return parser


def main():
  parser = get_parser()
  args = parser.parse_args()
  with open(args.changelog, 'rb') as stream:
    content = stream.read()

  for item in content.split('- '):
    # strip all whitespace/newlines
    changelog_item = ' '.join(item.split())
    m = re.match(r'.*\(LP: #(?P<bug>\d+)\).*', changelog_item)
    if m:
        bugnum = m.group('bug')
        trello_bug_prefix = '[LP: #{bug}](http://pad.lv/{bug}) '.format(
            bug=bugnum)
        # Strip bug details from end and put it as markdown in prefix
        changelog_item.replace('(LP: #{0}'.format(bugnum), '')
        print(' - {0} {1}'.format(trello_bug_prefix, changelog_item))

if __name__ == '__main__':
    main()