/**
 * 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 java.util.List;
import java.util.Vector;

import org.glite.security.voms.admin.core.validation.RequestValidationContext;
import org.glite.security.voms.admin.core.validation.RequestValidationResult;
import org.glite.security.voms.admin.core.validation.strategies.RequestValidationStrategy;
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.database.OrgDBError;
import org.glite.security.voms.admin.integration.orgdb.model.VOMSOrgDBPerson;
import org.glite.security.voms.admin.persistence.model.request.NewVOMembershipRequest;

public class OrgDBRequestValidator implements
  RequestValidationStrategy<NewVOMembershipRequest>, RequestValidationContext {

  String experimentName;

  public OrgDBRequestValidator(String experimentName) {

    this.experimentName = experimentName;
  }

  protected void propertyEqualsIgnoreCase(String value1, String value2,
    String propertyName, List<String> errors) {

    if (!value1.equalsIgnoreCase(value2)) {

      String errorMessage = String
        .format(
          "Property '"
            + propertyName
            + "' does not match (ignoring case) the OrgDB VOMS person record. You entered  '%s', while  '%s' was expected.",
          value1, value2);
      errors.add(errorMessage);
    }

  }

  protected List<String> checkRequestAgainstParticipation(
    NewVOMembershipRequest r, VOMSOrgDBPerson p) {

    List<String> errors = new Vector<String>();

    propertyEqualsIgnoreCase(r.getRequesterInfo().getName(), p.getFirstName(),
      "name", errors);
    propertyEqualsIgnoreCase(r.getRequesterInfo().getSurname(), p.getName(),
      "surname", errors);

    return errors;

  }

  public RequestValidationResult validateRequest(NewVOMembershipRequest r) {

    try {

      String email = r.getRequesterInfo().getEmailAddress();
      OrgDBVOMSPersonDAO dao = OrgDBDAOFactory.instance().getVOMSPersonDAO();

      VOMSOrgDBPerson p = dao
        .findPersonWithValidExperimentParticipationByEmail(email,
          experimentName);

      if (p != null) {

        List<String> errors = checkRequestAgainstParticipation(r, p);

        if (!errors.isEmpty()) {
          RequestValidationResult result = RequestValidationResult
            .failure("OrgDb validation failed. The OrgDb VOMS person record linked to email address '"
              + email + "' did not match the data you entered.");
          result.setErrorMessages(errors);
          return result;
        } else {
          return RequestValidationResult.success();
        }

      } else {

        RequestValidationResult result = RequestValidationResult
          .failure("No OrgDB participation found matching email '" + email
            + "' for experiment '" + experimentName + "'.");

        return result;
      }

    } catch (OrgDBError e) {
      return RequestValidationResult.error(e.getMessage(), e);
    }
  }

  public String getExperimentName() {

    return experimentName;
  }

  public void setExperimentName(String experimentName) {

    this.experimentName = experimentName;
  }

  public RequestValidationStrategy<NewVOMembershipRequest> getVOMembershipRequestValidationStrategy() {

    return this;
  }

}