/*
 * Copyright 2018 A-SIT Plus GmbH
 * AT-specific eIDAS Connector has been developed in a cooperation between EGIZ,
 * A-SIT Plus GmbH, A-SIT, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "License");
 * You may not use this work except in compliance with the License.
 * You may obtain a copy of the License at:
 * https://joinup.ec.europa.eu/news/understanding-eupl-v12
 *
 * 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.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
*/

package at.asitplus.eidas.specific.connector.config;

import java.util.Arrays;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.opensaml.saml.saml2.metadata.ContactPerson;
import org.opensaml.saml.saml2.metadata.ContactPersonTypeEnumeration;
import org.opensaml.saml.saml2.metadata.EmailAddress;
import org.opensaml.saml.saml2.metadata.GivenName;
import org.opensaml.saml.saml2.metadata.Organization;
import org.opensaml.saml.saml2.metadata.OrganizationDisplayName;
import org.opensaml.saml.saml2.metadata.OrganizationName;
import org.opensaml.saml.saml2.metadata.OrganizationURL;
import org.opensaml.saml.saml2.metadata.SurName;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import at.asitplus.eidas.specific.core.MsEidasNodeConstants;
import at.gv.egiz.eaaf.core.api.idp.IConfiguration;
import at.gv.egiz.eaaf.core.exceptions.EaafConfigurationException;
import at.gv.egiz.eaaf.core.exceptions.EaafException;
import at.gv.egiz.eaaf.modules.pvp2.api.IPvp2BasicConfiguration;
import at.gv.egiz.eaaf.modules.pvp2.impl.utils.Saml2Utils;

@Service("PVPEndPointConfiguration")
public class PvpEndPointConfiguration implements IPvp2BasicConfiguration {
  private static final Logger log = LoggerFactory.getLogger(PvpEndPointConfiguration.class);

  private static final String DEFAULT_XML_LANG = "en";
  
  @Autowired(required = true)
  IConfiguration basicConfiguration;

  @Override
  public String getIdpEntityId(String authUrl) throws EaafException {
    return removePostFix(authUrl) + MsEidasNodeConstants.ENDPOINT_PVP_METADATA;

  }

  @Override
  public String getIdpSsoPostService(String authUrl) throws EaafException {
    return removePostFix(authUrl) + MsEidasNodeConstants.ENDPOINT_PVP_POST;

  }

  @Override
  public String getIdpSsoRedirectService(String authUrl) throws EaafException {
    return removePostFix(authUrl) + MsEidasNodeConstants.ENDPOINT_PVP_REDIRECT;

  }

  @Override
  public String getIdpSsoSoapService(String extractAuthUrlFromRequest) throws EaafException {
    log.warn("PVP S-Profile End-Point does NOT support SOAP Binding");
    return null;

  }

  @Override
  public List<ContactPerson> getIdpContacts() throws EaafException {
    final ContactPerson contactPerson = Saml2Utils.createSamlObject(ContactPerson.class);
    final GivenName givenName = Saml2Utils.createSamlObject(GivenName.class);
    final SurName surname = Saml2Utils.createSamlObject(SurName.class);
    final EmailAddress emailAddress = Saml2Utils.createSamlObject(EmailAddress.class);

    givenName.setName(getAndVerifyFromConfiguration(
        MsEidasNodeConstants.CONFIG_PROPS_METADATA_CONTACT_GIVENNAME));
    surname.setName(getAndVerifyFromConfiguration(
        MsEidasNodeConstants.CONFIG_PROPS_METADATA_CONTACT_SURNAME));
    emailAddress.setAddress(getAndVerifyFromConfiguration(
        MsEidasNodeConstants.CONFIG_PROPS_METADATA_CONTACT_EMAIL));

    contactPerson.setType(ContactPersonTypeEnumeration.TECHNICAL);
    contactPerson.setGivenName(givenName);
    contactPerson.setSurName(surname);
    contactPerson.getEmailAddresses().add(emailAddress);

    return Arrays.asList(contactPerson);

  }

  @Override
  public Organization getIdpOrganisation() throws EaafException {
    final Organization organisation = Saml2Utils.createSamlObject(Organization.class);
    final OrganizationName orgName = Saml2Utils.createSamlObject(OrganizationName.class);
    final OrganizationDisplayName orgDisplayName = Saml2Utils.createSamlObject(OrganizationDisplayName.class);
    final OrganizationURL orgUrl = Saml2Utils.createSamlObject(OrganizationURL.class);

    orgName.setXMLLang(DEFAULT_XML_LANG);
    orgName.setValue(getAndVerifyFromConfiguration(
        MsEidasNodeConstants.CONFIG_PROPS_METADATA_ORGANISATION_NAME));

    orgDisplayName.setXMLLang(DEFAULT_XML_LANG);
    orgDisplayName.setValue(getAndVerifyFromConfiguration(
        MsEidasNodeConstants.CONFIG_PROPS_METADATA_ORGANISATION_FRIENDLYNAME));

    orgUrl.setXMLLang(DEFAULT_XML_LANG);
    orgUrl.setValue(getAndVerifyFromConfiguration(
        MsEidasNodeConstants.CONFIG_PROPS_METADATA_ORGANISATION_URL));


    organisation.getOrganizationNames().add(orgName);
    organisation.getDisplayNames().add(orgDisplayName);
    organisation.getURLs().add(orgUrl);

    return organisation;
  }

  @Override
  public IConfiguration getBasicConfiguration() {
    return basicConfiguration;
  }
  
  private String removePostFix(String url) {
    if (url != null && url.endsWith("/")) {
      return url.substring(0, url.length() - 1);
    } else {
      return url;
    }
  }
  
  private String getAndVerifyFromConfiguration(String configKey) throws EaafConfigurationException {
    final String value = basicConfiguration.getBasicConfiguration(configKey);
    if (StringUtils.isEmpty(value)) {
      throw new EaafConfigurationException("config.08",
          new Object[] {configKey});

    }

    return value;
  }
}