/**
    * 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 org.apache.wss4j.policy.AssertionState;
  import org.apache.wss4j.common.WSSPolicyException;
  import org.apache.wss4j.policy.model.AbstractSecurityAssertion;
  import org.apache.wss4j.policy.model.Header;
  import org.apache.wss4j.policy.model.RequiredParts;
  import org.apache.xml.security.stax.securityEvent.SecurityEvent;
  import org.apache.xml.security.stax.securityEvent.SecurityEventConstants;
  import org.apache.wss4j.policy.stax.Assertable;
  import org.apache.wss4j.policy.stax.DummyPolicyAsserter;
  import org.apache.wss4j.policy.stax.PolicyAsserter;
  import org.apache.wss4j.stax.ext.WSSConstants;
  import org.apache.wss4j.stax.securityEvent.RequiredPartSecurityEvent;
  import org.apache.wss4j.stax.securityEvent.WSSecurityEventConstants;
  import org.apache.wss4j.stax.utils.WSSUtils;
  
  import javax.xml.namespace.QName;
  
  import java.util.*;
  
  /**
   * WSP1.3, 4.3.2 RequiredParts Assertion
   */
  public class RequiredPartsAssertionState extends AssertionState implements Assertable {
  
      private final Map<Header, Boolean> headers = new HashMap<>();
      private PolicyAsserter policyAsserter;
      private final boolean soap12;
  
      public RequiredPartsAssertionState(AbstractSecurityAssertion assertion,
                                         PolicyAsserter policyAsserter,
                                         boolean asserted,
                                         boolean soap12) {
          super(assertion, asserted);
  
          RequiredParts requiredParts = (RequiredParts) assertion;
          for (int i = 0; i < requiredParts.getHeaders().size(); i++) {
              Header header = requiredParts.getHeaders().get(i);
              headers.put(header, Boolean.FALSE);
          }
  
          this.policyAsserter = policyAsserter;
          if (this.policyAsserter == null) {
              this.policyAsserter = new DummyPolicyAsserter();
          }
  
          if (asserted) {
              policyAsserter.assertPolicy(getAssertion());
          }
  
          this.soap12 = soap12;
      }
  
      @Override
      public SecurityEventConstants.Event[] getSecurityEventType() {
          return new SecurityEventConstants.Event[]{
                  WSSecurityEventConstants.REQUIRED_PART
          };
      }
  
      @Override
      public boolean assertEvent(SecurityEvent securityEvent) throws WSSPolicyException {
          RequiredPartSecurityEvent requiredPartSecurityEvent = (RequiredPartSecurityEvent) securityEvent;
  
          Iterator<Map.Entry<Header, Boolean>> elementMapIterator = headers.entrySet().iterator();
          while (elementMapIterator.hasNext()) {
              Map.Entry<Header, Boolean> next = elementMapIterator.next();
              Header header = next.getKey();
              QName headerQName = new QName(header.getNamespace(), header.getName() == null ? "" : header.getName());
  
              List<QName> headerPath = new LinkedList<>();
              if (soap12) {
                  headerPath.addAll(WSSConstants.SOAP_12_HEADER_PATH);
              } else {
                  headerPath.addAll(WSSConstants.SOAP_11_HEADER_PATH);
              }
              headerPath.add(headerQName);
  
              if (WSSUtils.pathMatches(headerPath, requiredPartSecurityEvent.getElementPath(), header.getName() == null)) {
                  next.setValue(Boolean.TRUE);
                 break;
             }
         }
         //if we return false here other required elements will trigger a PolicyViolationException
         policyAsserter.assertPolicy(getAssertion());
         return true;
     }
 
     @Override
     public boolean isAsserted() {
         clearErrorMessage();
         Iterator<Map.Entry<Header, Boolean>> elementMapIterator = headers.entrySet().iterator();
         while (elementMapIterator.hasNext()) {
             Map.Entry<Header, Boolean> next = elementMapIterator.next();
             if (Boolean.FALSE.equals(next.getValue())) {
                 setErrorMessage("Element " + next.getKey().toString() + " must be present");
                 policyAsserter.unassertPolicy(getAssertion(), getErrorMessage());
                 return false;
             }
         }
         policyAsserter.assertPolicy(getAssertion());
         return true;
     }
 }