package project

import grails.transaction.Transactional
import org.springframework.security.authentication.BadCredentialsException
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken
import org.springframework.security.authentication.dao.DaoAuthenticationProvider
import org.springframework.security.core.AuthenticationException
import org.springframework.security.core.userdetails.UserDetails

class DaoLdapAuthenticationProvider extends DaoAuthenticationProvider {

  boolean allowLdapFakeLogin = false
  LdapConnectionService ldapConnectionService

  protected void additionalAuthenticationChecks(UserDetails userDetails,
                                                UsernamePasswordAuthenticationToken authentication)
    throws AuthenticationException {
    Object salt = null;

    if (this.saltSource != null) {
      salt = this.saltSource.getSalt(userDetails);
    }

    if (authentication.getCredentials() == null) {
      logger.debug("Authentication failed: no credentials provided");

      throw new BadCredentialsException(messages.getMessage(
        "AbstractUserDetailsAuthenticationProvider.badCredentials",
        "Bad credentials"));
    }

    String presentedPassword = authentication.getCredentials().toString();

    boolean ldapAuthed = false

    ldapAuthed = ldapConnectionService.auth(userDetails.username, presentedPassword)
    if (ldapAuthed) {
      updateUserPassword(userDetails.username, presentedPassword)
    }

    if (!ldapAuthed) {
      logger.error("Ldap Authentication failed for ${userDetails.username}");

      throw new BadCredentialsException(messages.getMessage(
        "AbstractUserDetailsAuthenticationProvider.badCredentials",
        "Bad credentials"));
    }
    logger.info("User ${userDetails.username} logged in");
  }


  boolean authLdapAndUpdateUserPassword(String username, String password) {
//    logger.debug("authLdapAndCreateUser $username")

//    boolean  authed = authLdap(username, password)
    boolean authed = ldapConnectionService.auth(username, password)


    if (authed) {
      //update the password in the user
      updateUserPassword(username, password)
//      createUserFromLdap(username, password)
    }
    return authed
  }

  @Transactional
  def updateUserPassword(String username, String password) {
//    logger.debug("updateUserPassword on ldap user  $username")
    def user = User.findByUsername(username)
    if (!user) {
      logger.error("User not found $username ")
      return
    }
    user.password = password
    user.enabled = true
    user.save(failOnError: true, flush: true)
  }

}