# MIT licensed
# Copyright (c) 2020 lilydjwg <lilydjwg@gmail.com>, et al.
# Copyright (c) 2020 Sunlei <guizaicn@gmail.com>

from xml.etree import ElementTree

from nvchecker.api import session

NAMESPACE = 'http://www.andymatuschak.org/xml-namespaces/sparkle'


async def get_version(name, conf, *, cache, **kwargs):
  sparkle = conf['sparkle']
  return await cache.get(sparkle, get_version_impl)


async def get_version_impl(sparkle):
  res = await session.get(sparkle)
  root = ElementTree.fromstring(res.body)
  item = root.find('./channel/item[1]/enclosure')

  version_string = item.get(f'{{{NAMESPACE}}}shortVersionString')
  build_number = item.get(f'{{{NAMESPACE}}}version')

  if (version_string and version_string.isdigit()) and (
    build_number and not build_number.isdigit()
  ):
    version_string, build_number = build_number, version_string

  version = []

  if version_string:
    version.append(version_string)
  if build_number and (build_number not in version):
    version.append(build_number)

  return '-'.join(version) if version else None
