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.spec.impl;
  
  import java.util.Objects;
  
  import org.jspecify.annotations.NonNull;
  
  import org.apache.causeway.commons.internal.base._Strings;
  import org.apache.causeway.core.metamodel.progmodel.ProgrammingModel;
  
  final class _MixedInMemberNamingStrategy implements ProgrammingModel.MixinNamingStrategy {
      
      @Override
      public String memberId(Class<?> mixinClass) {
          return mixinMemberId(mixinClass);
      }
  
      @Override
      public String memberFriendlyName(Class<?> mixinClass) {
          return mixinFriendlyName(mixinClass);
      }
  
      /**
       * @param mixinActionAsRegular - first pass MM introspection produces regular ObjectAction instances
       *              for mixin main methods
       */
      static String mixinFriendlyName(final @NonNull ObjectActionDefault mixinActionAsRegular) {
          return mixinFriendlyName(mixinClass(mixinActionAsRegular));
      }
  
      static String mixinFriendlyName(final @NonNull Class<?> mixinClass) {
          return _Strings.asCamelCase.andThen(_Strings.asNaturalName).apply(lastWord(mixinClass.getSimpleName()));
      }
  
      /**
       * @param mixinActionAsRegular - first pass MM introspection produces regular ObjectAction instances
       *              for mixin main methods
       */
      static String mixinMemberId(final @NonNull ObjectActionDefault mixinActionAsRegular) {
          return mixinMemberId(mixinClass(mixinActionAsRegular));
      }
  
      static String mixinMemberId(final @NonNull Class<?> mixinClass) {
          return _Strings.decapitalize(lastWord(mixinClass.getSimpleName()));
      }
  
      // -- HELPER
  
      private static Class<?> mixinClass(final ObjectActionDefault mixinActionAsRegular) {
          return mixinActionAsRegular.getFeatureIdentifier().logicalType().correspondingClass();
      }
  
      private static String lastWord(final String mixinClassSimpleName) {
          final String deriveFromUnderscore = lastToken(mixinClassSimpleName, "_");
          if(!Objects.equals(mixinClassSimpleName, deriveFromUnderscore)) {
              return deriveFromUnderscore;
          }
          final String deriveFromDollar = lastToken(mixinClassSimpleName, "$");
          if(!Objects.equals(mixinClassSimpleName, deriveFromDollar)) {
              return deriveFromDollar;
          }
          return mixinClassSimpleName;
      }
  
      private static String lastToken(final String singularName, final String separator) {
          final int indexOfSeparator = singularName.lastIndexOf(separator);
          return occursNotAtEnd(singularName, indexOfSeparator)
                  ? singularName.substring(indexOfSeparator + 1)
                  : singularName;
      }
  
      private static boolean occursNotAtEnd(final String singularName, final int indexOfUnderscore) {
          return indexOfUnderscore != -1
                  && indexOfUnderscore != singularName.length() - 1;
      }
  
  }
  