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   *  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
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  package org.apache.causeway.testdomain.jpa;
  
  import java.util.List;
  import java.util.stream.Collectors;
  
  import jakarta.inject.Inject;
  import jakarta.inject.Named;
  import jakarta.xml.bind.JAXBException;
  
  import org.springframework.web.context.request.RequestContextHolder;
  import org.springframework.web.context.request.ServletRequestAttributes;
  
  import org.apache.causeway.applib.annotation.Action;
  import org.apache.causeway.applib.annotation.DomainService;
  import org.apache.causeway.applib.annotation.ParameterLayout;
  import org.apache.causeway.applib.annotation.PriorityPrecedence;
  import org.apache.causeway.applib.services.repository.RepositoryService;
  import org.apache.causeway.commons.internal.base._NullSafe;
  import org.apache.causeway.commons.internal.collections._Lists;
  import org.apache.causeway.testdomain.jpa.entities.JpaBook;
  import org.apache.causeway.testdomain.jpa.entities.JpaProduct;
  import org.apache.causeway.testdomain.util.dto.BookDto;
  
  import lombok.RequiredArgsConstructor;
  
  @Named("testdomain.jpa.InventoryResource")
  @DomainService
  @jakarta.annotation.Priority(PriorityPrecedence.EARLY)
  @RequiredArgsConstructor(onConstructor_ = { @Inject })
  public class JpaInventoryResource {
  
      final RepositoryService repository;
  
      @Action
      public List<JpaProduct> listProducts() {
          return repository.allInstances(JpaProduct.class);
      }
  
      @Action
      public List<JpaBook> listBooks() {
          return repository.allInstances(JpaBook.class);
      }
  
      @Action
      public JpaBook recommendedBookOfTheWeek() {
          // for this test we do not care if we generate duplicates
          var book = JpaBook.of("Book of the week", "An awesome Book", 12, "Author", "ISBN", "Publisher");
          return repository.persist(book);
      }
  
      @Action
      public List<JpaBook> multipleBooks(
  
              @ParameterLayout(named = "") final
              int nrOfBooks
  
              ) {
  
          var books = _Lists.<JpaBook>newArrayList();
  
          // for this test we do not care if we generate duplicates
          for(int i=0; i<nrOfBooks; ++i) {
              var book = JpaBook.of("MultipleBooksTest", "An awesome Book["+i+"]", 12, "Author", "ISBN", "Publisher");
              books.add(repository.persist(book));
          }
          return books;
      }
  
      @Action //TODO improve the REST client such that the param can be of type Book
      public JpaBook storeBook(final String newBook) throws JAXBException {
          var book = JpaBook.fromDto(BookDto.decode(newBook));
          return repository.persist(book);
      }
  
      // -- NON - ENTITIES
  
      @Action
      public String httpSessionInfo() {
  
          // when running with basic-auth strategy, we don't want to create HttpSessions at all
          // however, this isn't the case if UserService is in use, as that _dpes_
          // use HttpSession to hold any impersonated user.
  
          var servletRequestAttributes =
                  (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
          var httpSession = servletRequestAttributes.getRequest().getSession(false);
          if(httpSession==null) {
              return "no http-session";
          }
          var sessionAttributeNames = _NullSafe.stream(httpSession.getAttributeNames())
          .collect(Collectors.joining(","));
  
          return String.format("http-session attribute names: {%s}", sessionAttributeNames);
      }
  
      @Action
      public BookDto recommendedBookOfTheWeekAsDto() {
          // for this test we do not care if we generate duplicates
          var book = JpaBook.of("Book of the week", "An awesome Book", 12, "Author", "ISBN", "Publisher");
          return BookDto.from(book);
      }
  
      @Action
      public List<BookDto> multipleBooksAsDto(
  
              @ParameterLayout(named = "") final
              int nrOfBooks
  
              ) {
  
          var books = _Lists.<BookDto>newArrayList();
  
          // for this test we do not care if we generate duplicates
          for(int i=0; i<nrOfBooks; ++i) {
              var book = JpaBook.of("MultipleBooksTest", "An awesome Book["+i+"]", 12, "Author", "ISBN", "Publisher");
              books.add(BookDto.from(book));
          }
          return books;
      }
  
  }
  