/**
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements. See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership. The ASF licenses this file
    * to you 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.apache.wss4j.policy.stax.assertionStates;
  
  import javax.xml.namespace.QName;
  
  import org.apache.wss4j.common.WSSPolicyException;
  import org.apache.wss4j.policy.SPConstants;
  import org.apache.wss4j.policy.model.AbstractSecurityAssertion;
  import org.apache.wss4j.policy.model.AbstractToken;
  import org.apache.wss4j.policy.model.SecurityContextToken;
  import org.apache.wss4j.policy.stax.PolicyAsserter;
  import org.apache.xml.security.stax.securityEvent.SecurityEventConstants;
  import org.apache.xml.security.stax.securityEvent.TokenSecurityEvent;
  import org.apache.xml.security.stax.securityToken.SecurityToken;
  import org.apache.wss4j.stax.securityEvent.SecurityContextTokenSecurityEvent;
  import org.apache.wss4j.stax.securityEvent.WSSecurityEventConstants;
  
  /**
   * WSP1.3, 5.4.6 SecurityContextToken Assertion
   */
  
  public class SecurityContextTokenAssertionState extends TokenAssertionState {
  
      public SecurityContextTokenAssertionState(AbstractSecurityAssertion assertion, boolean asserted,
                                                PolicyAsserter policyAsserter, boolean initiator) {
          super(assertion, asserted, policyAsserter, initiator);
  
          if (asserted) {
              SecurityContextToken token = (SecurityContextToken) getAssertion();
              String namespace = token.getName().getNamespaceURI();
              if (token.isRequireExternalUriReference()) {
                  getPolicyAsserter().assertPolicy(new QName(namespace, SPConstants.REQUIRE_EXTERNAL_URI_REFERENCE));
              }
              if (token.isSc10SecurityContextToken()) {
                  getPolicyAsserter().assertPolicy(new QName(namespace, SPConstants.SC10_SECURITY_CONTEXT_TOKEN));
              }
              if (token.isSc13SecurityContextToken()) {
                  getPolicyAsserter().assertPolicy(new QName(namespace, SPConstants.SC13_SECURITY_CONTEXT_TOKEN));
              }
          }
      }
  
      @Override
      public SecurityEventConstants.Event[] getSecurityEventType() {
          return new SecurityEventConstants.Event[]{
                  WSSecurityEventConstants.SECURITY_CONTEXT_TOKEN
          };
      }
  
      @Override
      public boolean assertToken(TokenSecurityEvent<? extends SecurityToken> tokenSecurityEvent,
                                 AbstractToken abstractToken) throws WSSPolicyException {
          if (!(tokenSecurityEvent instanceof SecurityContextTokenSecurityEvent)) {
              throw new WSSPolicyException("Expected a SecurityContextTokenSecurityEvent but got " + tokenSecurityEvent.getClass().getName());
          }
          SecurityContextTokenSecurityEvent securityContextTokenSecurityEvent = (SecurityContextTokenSecurityEvent) tokenSecurityEvent;
          SecurityContextToken securityContextToken = (SecurityContextToken) abstractToken;
  
          if (securityContextToken.getIssuerName() != null
              && !securityContextToken.getIssuerName().equals(securityContextTokenSecurityEvent.getIssuerName())) {
              setErrorMessage("IssuerName in Policy (" + securityContextToken.getIssuerName()
                  + ") didn't match with the one in the SecurityContextToken (" + securityContextTokenSecurityEvent.getIssuerName() + ")");
              getPolicyAsserter().unassertPolicy(getAssertion(), getErrorMessage());
              return false;
          }
  
          String namespace = getAssertion().getName().getNamespaceURI();
          if (securityContextToken.isRequireExternalUriReference()) {
              if (!securityContextTokenSecurityEvent.isExternalUriRef()) {
                  setErrorMessage("Policy enforces externalUriRef but we didn't got one");
                  getPolicyAsserter().unassertPolicy(new QName(namespace, SPConstants.REQUIRE_EXTERNAL_URI_REFERENCE),
                                                     getErrorMessage());
                  return false;
              } else {
                  getPolicyAsserter().assertPolicy(new QName(namespace, SPConstants.REQUIRE_EXTERNAL_URI_REFERENCE));
              }
          }
          //todo sp:SC13SecurityContextToken:
          //always return true to prevent false alarm in case additional tokens with the same usage
          //appears in the message but do not fulfill the policy and are also not needed to fulfil the policy.
          if (securityContextToken.isSc10SecurityContextToken()) {
              getPolicyAsserter().assertPolicy(new QName(namespace, SPConstants.SC10_SECURITY_CONTEXT_TOKEN));
         }
         if (securityContextToken.isSc13SecurityContextToken()) {
             getPolicyAsserter().assertPolicy(new QName(namespace, SPConstants.SC13_SECURITY_CONTEXT_TOKEN));
         }
 
         getPolicyAsserter().assertPolicy(getAssertion());
         return true;
     }
 }