package utils;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

/**
 * Loads the SSO login configuration, if any. <br>
 * This file is part of the Security Shepherd Project.
 *
 * <p>The Security Shepherd project is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.<br>
 *
 * <p>The Security Shepherd project is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU General Public License for more details.<br>
 *
 * <p>You should have received a copy of the GNU General Public License along with the Security
 * Shepherd project. If not, see <http://www.gnu.org/licenses/>.
 *
 * @author Mark Denihan
 */
public class LoginMethod {

  private static boolean isSaml = false;
  private static boolean isSet = false;

  private static final Logger log = LogManager.getLogger(LoginMethod.class);

  public static boolean isSaml() {

    if (isSet) {
      // Data is cached, so let's fetch it from cache

      return isSaml;

    } else {

      ClassLoader classLoader = LoginMethod.class.getClassLoader();

      String unpackFileName = "sso.properties";

      try (InputStream inputStream = classLoader.getResourceAsStream(unpackFileName)) {
        if (inputStream != null) {
          Properties prop = new Properties();
          prop.load(inputStream);
          if (prop != null) {

            // Get id and name from SAML data

            String isSSOEnabled = prop.getProperty("sso.enabled");

            isSaml = Boolean.parseBoolean(isSSOEnabled);

            isSet = true;
          }
        } else {
          // SSO properties found, we default to sso = false
          isSaml = false;
          isSet = true;
        }
      } catch (IOException e) {
        String errorMsg = "SAML unpack properties file '" + unpackFileName + "' cannot be loaded";

        log.error(errorMsg);
        throw new RuntimeException(errorMsg);
      }

      return isSaml;
    }
  }

  public static Boolean isLogin() {
    return (!isSaml());
  }
}