content: /*
   *  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.causeway.core.metamodel.facets.param.autocomplete.method;
  
  import java.util.Optional;
  import java.util.function.BiConsumer;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.commons.internal.reflection._GenericResolver.ResolvedConstructor;
  import org.apache.causeway.commons.internal.reflection._GenericResolver.ResolvedMethod;
  import org.apache.causeway.commons.internal.reflection._GenericResolver.ResolvedType;
  import org.apache.causeway.commons.internal.reflection._MethodFacades.MethodFacade;
  import org.apache.causeway.commons.semantics.CollectionSemantics;
  import org.apache.causeway.core.metamodel.consent.InteractionInitiatedBy;
  import org.apache.causeway.core.metamodel.facetapi.FacetHolder;
  import org.apache.causeway.core.metamodel.facets.ImperativeFacet;
  import org.apache.causeway.core.metamodel.facets.param.autocomplete.ActionParameterAutoCompleteFacetAbstract;
  import org.apache.causeway.core.metamodel.facets.param.autocomplete.MinLengthUtil;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.object.ManagedObjects;
  import org.apache.causeway.core.metamodel.object.MmInvokeUtils;
  import org.apache.causeway.core.metamodel.spec.ObjectSpecification;
  
  import lombok.Getter;
  import org.jspecify.annotations.NonNull;
  
  public class ActionParameterAutoCompleteFacetViaMethod
  extends ActionParameterAutoCompleteFacetAbstract
  implements ImperativeFacet {
  
      @Getter(onMethod_ = {@Override}) private final @NonNull Can<MethodFacade> methods;
      private final ResolvedType paramSupportReturnType;
      private final int minLength;
      private final Optional<ResolvedConstructor> patConstructor;
  
      public ActionParameterAutoCompleteFacetViaMethod(
              final ResolvedMethod method,
              final ResolvedType paramSupportReturnType,
              final Optional<ResolvedConstructor> patConstructor,
              final FacetHolder holder) {
  
          super(holder);
          this.methods = ImperativeFacet.singleMethod(method, patConstructor);
          this.paramSupportReturnType = paramSupportReturnType;
          this.minLength = MinLengthUtil.determineMinLength(method);
          this.patConstructor = patConstructor;
      }
  
      @Override
      public Intent getIntent() {
          return Intent.CHOICES_OR_AUTOCOMPLETE;
      }
  
      @Override
      public int getMinLength() {
          return minLength;
      }
  
      @Override
      public Can<ManagedObject> autoComplete(
              final ObjectSpecification elementSpec,
              final ManagedObject owningAdapter,
              final Can<ManagedObject> pendingArgs,
              final String searchArg,
              final InteractionInitiatedBy interactionInitiatedBy) {
  
          var method = methods.getFirstElseFail();
          final Object collectionOrArray = MmInvokeUtils
                  .invokeWithSearchArg(patConstructor, method, owningAdapter, pendingArgs, searchArg);
          if (collectionOrArray == null) {
              return Can.empty();
          }
          var visibleChoices = ManagedObjects
                  .adaptMultipleOfTypeThenFilterByVisibility(
                          elementSpec, collectionOrArray, interactionInitiatedBy);
  
          return visibleChoices;
      }
  
      @Override
      public void visitAttributes(final BiConsumer<String, Object> visitor) {
          super.visitAttributes(visitor);
          ImperativeFacet.visitAttributes(this, visitor);
          visitor.accept("choicesType", paramSupportReturnType.collectionSemantics()
                  .map(CollectionSemantics::name)
                  .orElse("NONE"));
          visitor.accept("minLength", minLength);
      }
  
  }
  