/*
    * Licensed to The Apereo Foundation under one or more contributor license
    * agreements. See the NOTICE file distributed with this work for additional
    * information regarding copyright ownership.
    *
    *
    * The Apereo Foundation licenses this file to you under the Educational
    * Community 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://opensource.org/licenses/ecl2.txt
   *
   * 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.opencastproject.graphql.command;
  
  import org.opencastproject.authorization.xacml.manager.api.AclService;
  import org.opencastproject.authorization.xacml.manager.api.AclServiceFactory;
  import org.opencastproject.elasticsearch.api.SearchIndexException;
  import org.opencastproject.elasticsearch.index.ElasticsearchIndex;
  import org.opencastproject.graphql.exception.GraphQLRuntimeException;
  import org.opencastproject.graphql.execution.context.OpencastContext;
  import org.opencastproject.graphql.execution.context.OpencastContextManager;
  import org.opencastproject.graphql.series.GqlSeries;
  import org.opencastproject.graphql.type.input.AccessControlListInput;
  import org.opencastproject.graphql.type.input.GqlCommonSeriesMetadataInput;
  import org.opencastproject.index.service.api.IndexService;
  import org.opencastproject.index.service.catalog.adapter.series.CommonSeriesCatalogUIAdapter;
  import org.opencastproject.index.service.exception.IndexServiceException;
  import org.opencastproject.mediapackage.MediaPackageElementFlavor;
  import org.opencastproject.metadata.dublincore.DublinCoreMetadataCollection;
  import org.opencastproject.metadata.dublincore.MetadataField;
  import org.opencastproject.metadata.dublincore.MetadataList;
  import org.opencastproject.security.api.AccessControlEntry;
  import org.opencastproject.security.api.AccessControlList;
  import org.opencastproject.security.api.SecurityService;
  import org.opencastproject.series.api.SeriesService;
  
  import java.util.Map;
  import java.util.Optional;
  import java.util.TreeMap;
  
  public class CreateSeriesCommand extends AbstractCommand<GqlSeries> {
  
    private AccessControlListInput aclInput;
  
    public CreateSeriesCommand(final Builder builder) {
      super(builder);
      this.aclInput = builder.accessControlListInput;
    }
  
    @Override
    public GqlSeries execute() {
      OpencastContext context = OpencastContextManager.getCurrentContext();
      final ElasticsearchIndex index = context.getService(ElasticsearchIndex.class);
      final IndexService indexService = context.getService(IndexService.class);
  
      final Map<String, Object> seriesMetadata = environment.getArgument("metadata");
  
      MetadataList metadataList = createMetadataList(seriesMetadata, indexService);
      Map<String, String> options = new TreeMap<>();
      Optional<Long> optThemeId = Optional.empty();
  
      final SeriesService seriesService = context.getService(SeriesService.class);
  
      AccessControlList acl = new AccessControlList();
      for (var entry : aclInput.getEntries()) {
        for (var action : entry.getAction()) {
          acl.getEntries().add(new AccessControlEntry(entry.getRole(), action, true));
        }
      }
  
      if (aclInput.getManagedAclId() != null) {
        AclService aclService = context.getService(AclServiceFactory.class)
            .serviceFor(context.getService(SecurityService.class).getOrganization());
        aclService.getAcl(aclInput.getManagedAclId())
            .ifPresent(value -> acl.merge(value.getAcl()));
      }
      String seriesId;
      try {
        seriesId = indexService.createSeries(metadataList, options, Optional.of(acl), optThemeId);
      } catch (IndexServiceException e) {
        throw new GraphQLRuntimeException(e);
      }
  
      try {
        return new GqlSeries(
            index.getSeries(seriesId, context.getOrganization().getId(), context.getUser()).get()
        );
      } catch (SearchIndexException e) {
        throw new GraphQLRuntimeException(e);
      }
   }
 
   private MetadataList createMetadataList(Map<String, Object> seriesMetadata, IndexService indexService) {
     CommonSeriesCatalogUIAdapter adapter = (CommonSeriesCatalogUIAdapter) indexService
         .getCommonSeriesCatalogUIAdapter();
 
     MetadataList list = new MetadataList();
     list.add(adapter, adapter.getRawFields());
 
     final MediaPackageElementFlavor flavor = MediaPackageElementFlavor
         .parseFlavor("dublincore/series");
 
     final DublinCoreMetadataCollection collection = list.getMetadataByFlavor(flavor.toString());
 
     seriesMetadata.keySet().forEach(k -> {
       final MetadataField target = collection.getOutputFields().get(k);
       target.setValue(seriesMetadata.get(k));
     });
 
     return list;
   }
 
   public static Builder create(
       GqlCommonSeriesMetadataInput seriesMetadataInput,
       AccessControlListInput accessControlListInput
   ) {
     return new Builder(seriesMetadataInput, accessControlListInput);
   }
 
   public static class Builder extends AbstractCommand.Builder<GqlSeries> {
 
     private final GqlCommonSeriesMetadataInput seriesMetadataInput;
 
     private final AccessControlListInput accessControlListInput;
 
     public Builder(GqlCommonSeriesMetadataInput seriesMetadataInput, AccessControlListInput accessControlListInput) {
       this.seriesMetadataInput = seriesMetadataInput;
       this.accessControlListInput = accessControlListInput;
     }
 
     @Override
     public void validate() {
       super.validate();
       if (seriesMetadataInput == null) {
         throw new IllegalStateException("Series metadata cannot be null");
       }
       if (accessControlListInput == null) {
         throw new IllegalStateException("Access control list cannot be null");
       }
     }
 
     @Override
     public CreateSeriesCommand build() {
       validate();
       return new CreateSeriesCommand(this);
     }
   }
 
 }