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package org.openecomp.sdc.translator.services.heattotosca;

import org.apache.commons.collections.CollectionUtils;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class ConsolidationTypesConnectivity {

  private static Map<ConsolidationEntityType, Set<ConsolidationEntityType>>
      entityToEntitiesWithoutRelationship;

  static {
    entityToEntitiesWithoutRelationship = new HashMap<>();
    entityToEntitiesWithoutRelationship
        .put(ConsolidationEntityType.COMPUTE, getIgnoredComputeRelationships());
    entityToEntitiesWithoutRelationship
        .put(ConsolidationEntityType.PORT,getIgnoredPortRelationships());
    entityToEntitiesWithoutRelationship
        .put(ConsolidationEntityType.VOLUME, getIgnoredVolumeRelationships());
    entityToEntitiesWithoutRelationship
        .put(ConsolidationEntityType.VFC_NESTED, getIgnoredVfcNestedRelationships());
    entityToEntitiesWithoutRelationship.
        put(ConsolidationEntityType.NESTED, getIgnoredNestedRelationships());
  }

  private static Set<ConsolidationEntityType> getIgnoredComputeRelationships(){
    return Stream.of(ConsolidationEntityType.COMPUTE,
        ConsolidationEntityType.VOLUME,
        ConsolidationEntityType.PORT,
        ConsolidationEntityType.NESTED,
        ConsolidationEntityType.VFC_NESTED).collect(Collectors.toSet());
  }

  private static Set<ConsolidationEntityType> getIgnoredPortRelationships(){
    return Stream.of(ConsolidationEntityType.COMPUTE,
        ConsolidationEntityType.VOLUME,
        ConsolidationEntityType.PORT,
        ConsolidationEntityType.NESTED,
        ConsolidationEntityType.VFC_NESTED).collect(Collectors.toSet());
  }

  private static Set<ConsolidationEntityType> getIgnoredVolumeRelationships(){
    return Stream.of(ConsolidationEntityType.COMPUTE,
        ConsolidationEntityType.VOLUME,
        ConsolidationEntityType.PORT,
        ConsolidationEntityType.NESTED,
        ConsolidationEntityType.VFC_NESTED).collect(Collectors.toSet());
  }

  private static Set<ConsolidationEntityType> getIgnoredVfcNestedRelationships(){
    return Stream.of(ConsolidationEntityType.COMPUTE,
        ConsolidationEntityType.VOLUME,
        ConsolidationEntityType.PORT,
        ConsolidationEntityType.NESTED,
        ConsolidationEntityType.VFC_NESTED).collect(Collectors.toSet());
  }

  private static Set<ConsolidationEntityType> getIgnoredNestedRelationships(){
    return Stream.of(ConsolidationEntityType.COMPUTE,
        ConsolidationEntityType.PORT,
        ConsolidationEntityType.NESTED,
        ConsolidationEntityType.VFC_NESTED).collect(Collectors.toSet());
  }

  public static boolean isDependsOnRelationshipValid(ConsolidationEntityType source,
                                                     ConsolidationEntityType target) {
    Set<ConsolidationEntityType> consolidationEntityTypes =
        entityToEntitiesWithoutRelationship.get(source);
    return CollectionUtils.isEmpty(consolidationEntityTypes) ||
        !consolidationEntityTypes.contains(target);

  }
}