/**
 * Copyright (c) Istituto Nazionale di Fisica Nucleare (INFN). 2006-2016
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.glite.security.voms.admin.integration.orgdb;

import org.glite.security.voms.admin.integration.orgdb.dao.OrgDBDAOFactory;
import org.glite.security.voms.admin.integration.orgdb.dao.OrgDBVOMSPersonDAO;
import org.glite.security.voms.admin.integration.orgdb.model.VOMSOrgDBPerson;
import org.glite.security.voms.admin.integration.orgdb.strategies.OrgDBEmailAddressValidationStrategy;
import org.glite.security.voms.admin.integration.orgdb.strategies.OrgDBEmailValidationResult;
import org.glite.security.voms.admin.persistence.model.VOMSUser;

public class DefaultEmailValidationStrategy implements
  OrgDBEmailAddressValidationStrategy {

  private final String experimentName;

  public DefaultEmailValidationStrategy(String experiment) {

    experimentName = experiment;
  }

  private void sanityChecks(VOMSUser u, String emailAddress) {

    if (u == null)
      throw new IllegalArgumentException("null voms user");

    if (emailAddress == null)
      throw new IllegalArgumentException("null emailAddress");

    if (emailAddress.isEmpty())
      throw new IllegalArgumentException("Empty email address");
  }

  @Override
  public OrgDBEmailValidationResult validateEmailAddress(VOMSUser u,
    String emailAddress) {

    sanityChecks(u, emailAddress);

    OrgDBVOMSPersonDAO dao = OrgDBDAOFactory.instance().getVOMSPersonDAO();

    VOMSOrgDBPerson person = dao
      .findPersonWithValidExperimentParticipationByEmail(emailAddress,
        experimentName);

    if (person == null) {

      String msg = String.format(
        "No record found in OrgDB for emailAddress '%s' in experiment '%s'.",
        emailAddress, experimentName);

      return OrgDBEmailValidationResult.invalid(msg);
    }

    if (!person.getFirstName().equalsIgnoreCase(u.getName())
      || !person.getName().equalsIgnoreCase(u.getSurname())) {

      String msg = String.format(
        "Name in OrgDB record linked with email '%s' does not match '%s'.",
        emailAddress, u.getFullName());

      return OrgDBEmailValidationResult.invalid(msg);

    }

    return OrgDBEmailValidationResult.valid();
  }
}