from oauth.services.google import GoogleOAuthService
from util.config.validators import BaseValidator, ConfigValidationException

class GoogleLoginValidator(BaseValidator):
  name = "google-login"

  @classmethod
  def validate(cls, validator_context):
    """ Validates the Google Login client ID and secret. """
    config = validator_context.config
    client = validator_context.http_client
    url_scheme_and_hostname = validator_context.url_scheme_and_hostname

    google_login_config = config.get('GOOGLE_LOGIN_CONFIG')
    if not google_login_config:
      raise ConfigValidationException('Missing client ID and client secret')

    if not google_login_config.get('CLIENT_ID'):
      raise ConfigValidationException('Missing Client ID')

    if not google_login_config.get('CLIENT_SECRET'):
      raise ConfigValidationException('Missing Client Secret')

    oauth = GoogleOAuthService(config, 'GOOGLE_LOGIN_CONFIG')
    result = oauth.validate_client_id_and_secret(client, url_scheme_and_hostname)
    if not result:
      raise ConfigValidationException('Invalid client id or client secret')