package auth.sso;

import org.pac4j.core.client.Client;
import org.pac4j.core.credentials.Credentials;

/**
 * A thin interface over a Pac4j {@link Client} object and its
 * associated configurations.
 */
public interface SsoProvider<C extends SsoConfigs> {

  /**
   * The protocol used for SSO.
   */
  enum SsoProtocol {
    OIDC("oidc");
    // SAML -- not yet supported.

    // Common name appears in the Callback URL itself.
    private final String _commonName;

    public String getCommonName() {
      return _commonName;
    }

    SsoProtocol(String commonName) {
      _commonName = commonName;
    }
  }

  /**
   * Returns the configs required by the provider.
   */
  C configs();

  /**
   * Returns the SSO protocol associated with the provider instance.
   */
  SsoProtocol protocol();

  /**
   * Retrieves an initialized Pac4j {@link Client}.
   */
  Client<? extends Credentials> client();

}