/*
    * Copyright 2009 the original author or authors.
    *
    * 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.openehealth.ipf.commons.ihe.xds.core.validate.query;
  
  import static org.apache.commons.lang3.Validate.notNull;
  import static org.openehealth.ipf.commons.ihe.xds.core.validate.ValidationMessage.INVALID_QUERY_PARAMETER_VALUE;
  import static org.openehealth.ipf.commons.ihe.xds.core.validate.ValidationMessage.MISSING_REQUIRED_QUERY_PARAMETER;
  import static org.openehealth.ipf.commons.ihe.xds.core.validate.ValidationMessage.PARAMETER_VALUE_NOT_STRING_LIST;
  import static org.openehealth.ipf.commons.ihe.xds.core.validate.ValidatorAssertions.metaDataAssert;
  
  import java.util.List;
  import java.util.regex.Pattern;
  
  import org.openehealth.ipf.commons.ihe.xds.core.ebxml.EbXMLAdhocQueryRequest;
  import org.openehealth.ipf.commons.ihe.xds.core.metadata.AvailabilityStatus;
  import org.openehealth.ipf.commons.ihe.xds.core.transform.requests.QueryParameter;
  import org.openehealth.ipf.commons.ihe.xds.core.transform.requests.query.QuerySlotHelper;
  import org.openehealth.ipf.commons.ihe.xds.core.validate.XDSMetaDataException;
  
  /**
   * Query parameter validation for parameters that are AvailabilityStatus-based.
   * @author Jens Riemschneider
   */
  public class StatusValidation implements QueryParameterValidation {
      private static final Pattern PATTERN =
              Pattern.compile("\\s*\\(\\s*'.*'(\\s*,\\s*'.*')*\\s*\\)\\s*");
  
      private final QueryParameter param;
  
      /**
       * Constructs a validation object.
       * @param param
       *          parameter to validate.
       */
      public StatusValidation(QueryParameter param) {
          notNull(param, "param cannot be null");
          this.param = param;
      }
  
      @Override
      public void validate(EbXMLAdhocQueryRequest request) throws XDSMetaDataException {
          List<String> slotValues = request.getSlotValues(param.getSlotName());
          metaDataAssert(!slotValues.isEmpty(), MISSING_REQUIRED_QUERY_PARAMETER, slotValues);
          for (String slotValue : slotValues) {
              metaDataAssert(slotValue != null, MISSING_REQUIRED_QUERY_PARAMETER, param);
              metaDataAssert(PATTERN.matcher(slotValue).matches(),
                      PARAMETER_VALUE_NOT_STRING_LIST, param);
          }
  
          QuerySlotHelper slots = new QuerySlotHelper(request);
  
          List<AvailabilityStatus> list = slots.toStatus(param);
  
          if (list.isEmpty()) {
              for (String value : slots.toStringList(param)) {
                  metaDataAssert(AvailabilityStatus.valueOfOpcode(value) != null, INVALID_QUERY_PARAMETER_VALUE, value);
              }
          }
          metaDataAssert(!list.isEmpty(), MISSING_REQUIRED_QUERY_PARAMETER, slotValues);
  
      }
  }