from oauth.services.gitlab import GitLabOAuthService
from util.config.validators import BaseValidator, ConfigValidationException

class GitLabTriggerValidator(BaseValidator):
  name = "gitlab-trigger"

  @classmethod
  def validate(cls, validator_context):
    """ Validates the OAuth credentials and API endpoint for a GitLab service. """
    config = validator_context.config
    url_scheme_and_hostname = validator_context.url_scheme_and_hostname
    client = validator_context.http_client

    github_config = config.get('GITLAB_TRIGGER_CONFIG')
    if not github_config:
      raise ConfigValidationException('Missing GitLab client id and client secret')

    endpoint = github_config.get('GITLAB_ENDPOINT')
    if endpoint:
      if endpoint.find('http://') != 0 and endpoint.find('https://') != 0:
        raise ConfigValidationException('GitLab Endpoint must start with http:// or https://')

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

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

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