from contextlib import contextmanager

import os
import tempfile

from six import iteritems
from supervisor.options import ServerOptions

import jinja2
import pytest

from ..supervisord_conf_create import (default_services, limit_services, override_services,
                                       QUAY_SERVICES, QUAY_OVERRIDE_SERVICES)

@contextmanager
def environ(**kwargs):
  original_env = {key: os.getenv(key) for key in kwargs}
  os.environ.update(**kwargs)
  try:
    yield
  finally:
    for key, value in iteritems(original_env):
      if value is None:
        del os.environ[key]
      else:
        os.environ[key] = value


def render_supervisord_conf(config):
  with open(os.path.join(os.path.dirname(os.path.abspath(__file__)), "../../supervisord.conf.jnj")) as f:
    template = jinja2.Template(f.read())
  return template.render(config=config)


def test_supervisord_conf_validates():
  config = default_services()
  limit_services(config, QUAY_SERVICES)
  override_services(config, QUAY_OVERRIDE_SERVICES)
  rendered_config_file = render_supervisord_conf(config)
  print rendered_config_file

  with environ(QUAYPATH='.', QUAYDIR='/', QUAYCONF='/conf', DB_CONNECTION_POOLING_REGISTRY='true'):
    opts = ServerOptions()

    with tempfile.NamedTemporaryFile() as f:
      f.write(rendered_config_file)
      f.flush()

      opts.searchpaths = [f.name]
      assert opts.default_configfile() == f.name

      opts.realize([])
      opts.process_config()