/*
    * SPDX-FileCopyrightText: none
    * SPDX-License-Identifier: CC0-1.0
    */
   
   package gov.nist.secauto.oscal.lib.model.metadata;
   
   import gov.nist.secauto.metaschema.core.util.CollectionUtil;
   import gov.nist.secauto.oscal.lib.model.Property;
  
  import java.net.URI;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Objects;
  import java.util.Optional;
  import java.util.UUID;
  import java.util.stream.Collectors;
  import java.util.stream.Stream;
  
  import javax.xml.namespace.QName;
  
  import edu.umd.cs.findbugs.annotations.NonNull;
  
  public abstract class AbstractProperty implements IProperty {
  
    @NonNull
    public static QName qname(URI namespace, @NonNull String name) {
      return new QName(normalizeNamespace(namespace).toString(), name);
    }
  
    @NonNull
    public static QName qname(@NonNull String name) {
      return new QName(OSCAL_NAMESPACE.toString(), name);
    }
  
    @NonNull
    public static URI normalizeNamespace(URI namespace) {
      URI propertyNamespace = namespace;
      if (propertyNamespace == null) {
        propertyNamespace = OSCAL_NAMESPACE;
      }
      return propertyNamespace;
    }
  
    @SuppressWarnings("null")
    @NonNull
    public static Optional<Property> find(List<Property> props, @NonNull QName qname) {
      return CollectionUtil.listOrEmpty(props).stream().filter(prop -> qname.equals(prop.getQName())).findFirst();
    }
  
    protected AbstractProperty() {
      // only concrete classes should construct
    }
  
    public static List<Property> merge(@NonNull List<Property> original, @NonNull List<Property> additional) {
      return Stream.concat(original.stream(), additional.stream())
          .collect(Collectors.toCollection(LinkedList::new));
    }
  
    @Override
    public boolean isNamespaceEqual(@NonNull URI namespace) {
      return normalizeNamespace(getNs()).equals(namespace);
    }
  
    @NonNull
    public QName getQName() {
      return new QName(normalizeNamespace(getNs()).toString(), getName());
    }
  
    @NonNull
    public static Builder builder(@NonNull String name) {
      return new Builder(name);
    }
  
    public static class Builder {
      @NonNull
      private final String name;
  
      private UUID uuid;
      private URI namespace;
      private String value;
      private String clazz;
  
      public Builder(@NonNull String name) {
        this.name = Objects.requireNonNull(name, "name");
      }
  
      @NonNull
      public Builder uuid(@NonNull UUID uuid) {
        this.uuid = Objects.requireNonNull(uuid);
        return this;
      }
  
      @SuppressWarnings("PMD.NullAssignment") // needed
      @NonNull
      public Builder namespace(@NonNull URI namespace) {
        if (OSCAL_NAMESPACE.equals(namespace)) {
          this.namespace = null;
        } else {
         this.namespace = Objects.requireNonNull(namespace);
       }
       return this;
     }
 
     @NonNull
     public Builder value(@NonNull String value) {
       this.value = Objects.requireNonNull(value);
       return this;
     }
 
     @NonNull
     public Builder clazz(@NonNull String clazz) {
       this.clazz = Objects.requireNonNull(clazz);
       return this;
     }
 
     @NonNull
     public Property build() {
       Property retval = new Property();
       retval.setName(name);
       retval.setValue(Objects.requireNonNull(value, "value"));
       if (uuid != null) {
         retval.setUuid(uuid);
       }
       if (namespace != null) {
         retval.setNs(namespace);
       }
       if (clazz != null) {
         retval.setClazz(clazz);
       }
 
       return retval;
     }
   }
 }