/*
   * Copyright 2020-2026 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.xml.spring.boot.http.codec;
  
  import java.util.AbstractCollection;
  import java.util.HashSet;
  import java.util.Objects;
  import java.util.Set;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.bremersee.xml.JaxbContextBuilder;
  import org.bremersee.xml.http.codec.ReactiveJaxbDecoder;
  import org.bremersee.xml.http.codec.ReactiveJaxbEncoder;
  import org.bremersee.xml.spring.boot.JaxbContextBuilderAutoConfiguration;
  import org.bremersee.xml.spring.boot.http.JaxbReadWriteConfigurer;
  import org.jspecify.annotations.NonNull;
  import org.springframework.beans.factory.ObjectProvider;
  import org.springframework.boot.autoconfigure.AutoConfiguration;
  import org.springframework.boot.autoconfigure.AutoConfigureAfter;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication.Type;
  import org.springframework.boot.context.event.ApplicationReadyEvent;
  import org.springframework.context.event.EventListener;
  import org.springframework.http.codec.ServerCodecConfigurer;
  import org.springframework.util.ClassUtils;
  import org.springframework.web.reactive.config.WebFluxConfigurer;
  
  /**
   * The Jaxb 2 http message codec autoconfiguration.
   *
   * @author Christian Bremer
   */
  @ConditionalOnWebApplication(type = Type.REACTIVE)
  @ConditionalOnClass({WebFluxConfigurer.class, JaxbContextBuilder.class})
  @ConditionalOnBean(JaxbContextBuilder.class)
  @AutoConfigureAfter(JaxbContextBuilderAutoConfiguration.class)
  @AutoConfiguration
  public class Jaxb2HttpMessageCodecAutoConfiguration implements WebFluxConfigurer {
  
    private static final Log log = LogFactory.getLog(Jaxb2HttpMessageCodecAutoConfiguration.class);
  
    private final JaxbContextBuilder jaxbContextBuilder;
  
    private final Set<Class<?>> ignoreReadingClasses;
  
    private final Set<Class<?>> ignoreWritingClasses;
  
    /**
     * Instantiates a new Jaxb 2 http message codec autoconfiguration.
     *
     * @param jaxbContextBuilder the jaxb context builder
     * @param readWriteConfigurers the read write configurers
     */
    public Jaxb2HttpMessageCodecAutoConfiguration(
        ObjectProvider<JaxbContextBuilder> jaxbContextBuilder,
        ObjectProvider<JaxbReadWriteConfigurer> readWriteConfigurers) {
      this.jaxbContextBuilder = jaxbContextBuilder.getIfAvailable();
      this.ignoreReadingClasses = readWriteConfigurers
          .stream()
          .collect(
              HashSet::new,
              (a, b) -> a.addAll(b.getIgnoreReadingClasses()),
              AbstractCollection::addAll);
      this.ignoreWritingClasses = readWriteConfigurers
          .stream()
          .collect(
              HashSet::new,
              (a, b) -> a.addAll(b.getIgnoreWritingClasses()),
              AbstractCollection::addAll);
    }
  
    /**
     * Init.
     */
    @EventListener(ApplicationReadyEvent.class)
    public void init() {
      log.info(String.format("""
              
              *********************************************************************************
              * %s
              *********************************************************************************
              * jaxbContextBuilder = %s
              * ignoreReadingClasses = %s
             * ignoreWritingClasses = %s
             *********************************************************************************""",
         ClassUtils.getUserClass(getClass()).getSimpleName(),
         jaxbContextBuilder, ignoreReadingClasses, ignoreWritingClasses));
   }
 
   @Override
   public void configureHttpMessageCodecs(@NonNull ServerCodecConfigurer configurer) {
     if (Objects.nonNull(jaxbContextBuilder)) {
       log.info("Registering jaxb encoder and decoder.");
       configurer
           .customCodecs()
           .registerWithDefaultConfig(new ReactiveJaxbEncoder(
               jaxbContextBuilder, ignoreWritingClasses));
       configurer
           .customCodecs()
           .registerWithDefaultConfig(new ReactiveJaxbDecoder(
               jaxbContextBuilder, ignoreReadingClasses));
     }
   }
 
 }