/*
    * Copyright 2022 the original author or authors.
    *
    * Licensed 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.bremersee.apiclient.webflux.contract.spring;
  
  import static java.util.Objects.nonNull;
  
  import java.util.List;
  import java.util.stream.Collectors;
  import org.bremersee.apiclient.webflux.Invocation;
  import org.bremersee.apiclient.webflux.InvocationParameter;
  import org.bremersee.apiclient.webflux.contract.RequestBodyInserter;
  import org.springframework.web.bind.annotation.RequestBody;
  
  /**
   * The abstract request body inserter.
   *
   * @author Christian Bremer
   */
  public abstract class AbstractRequestBodyInserter implements RequestBodyInserter {
  
    @Override
    public boolean canInsert(Invocation invocation) {
      return canInsert(findPossibleBodies(invocation));
    }
  
    /**
     * Can insert.
     *
     * @param possibleBodies the possible bodies
     * @return the boolean
     */
    protected boolean canInsert(List<InvocationParameter> possibleBodies) {
      return !possibleBodies.isEmpty();
    }
  
    /**
     * Find possible bodies list.
     *
     * @param invocation the invocation
     * @return the list
     */
    protected List<InvocationParameter> findPossibleBodies(Invocation invocation) {
      return invocation.toMethodParameterStream()
          .filter(this::isPossibleBody)
          .sorted(new RequestBodyComparator())
          .collect(Collectors.toList());
    }
  
    /**
     * Is possible body boolean.
     *
     * @param invocationParameter the invocation parameter
     * @return the boolean
     */
    protected boolean isPossibleBody(InvocationParameter invocationParameter) {
      return nonNull(invocationParameter.getValue())
          && isPossibleBodyValue(invocationParameter)
          && hasMappingAnnotation(invocationParameter);
    }
  
    /**
     * Is possible body value boolean.
     *
     * @param invocationParameter the invocation parameter
     * @return the boolean
     */
    protected abstract boolean isPossibleBodyValue(InvocationParameter invocationParameter);
  
    /**
     * Has mapping annotation boolean.
     *
     * @param invocationParameter the invocation parameter
     * @return the boolean
     */
    protected boolean hasMappingAnnotation(InvocationParameter invocationParameter) {
      return invocationParameter.hasParameterAnnotation(RequestBody.class);
    }
  
  }