/*
    * Copyright 2020 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.security.authentication;
  
  import java.util.Optional;
  import lombok.extern.slf4j.Slf4j;
  import org.springframework.beans.factory.ObjectProvider;
  import org.springframework.boot.autoconfigure.AutoConfigureAfter;
  import org.springframework.boot.autoconfigure.AutoConfigureBefore;
  import org.springframework.boot.autoconfigure.condition.AnyNestedCondition;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
  import org.springframework.boot.autoconfigure.rsocket.RSocketMessagingAutoConfiguration;
  import org.springframework.boot.autoconfigure.security.SecurityProperties;
  import org.springframework.boot.autoconfigure.security.reactive.ReactiveUserDetailsServiceAutoConfiguration;
  import org.springframework.boot.context.properties.EnableConfigurationProperties;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Conditional;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.security.authentication.ReactiveAuthenticationManager;
  import org.springframework.security.core.userdetails.MapReactiveUserDetailsService;
  import org.springframework.security.core.userdetails.ReactiveUserDetailsService;
  import org.springframework.security.crypto.password.PasswordEncoder;
  import org.springframework.util.ClassUtils;
  
  /**
   * The reactive in memory user details auto configuration.
   *
   * @author Christian Bremer
   */
  @Configuration(proxyBeanMethods = false)
  @ConditionalOnClass({ReactiveAuthenticationManager.class})
  @ConditionalOnMissingBean(
      value = {
          ReactiveAuthenticationManager.class,
          ReactiveUserDetailsService.class
      },
      type = {
          "org.springframework.security.oauth2.jwt.ReactiveJwtDecoder",
          "org.springframework.security.oauth2.server.resource.introspection.ReactiveOpaqueTokenIntrospector"
      })
  @Conditional(ReactiveInMemoryUserDetailsAutoConfiguration.ReactiveUserDetailsServiceCondition.class)
  @AutoConfigureAfter(RSocketMessagingAutoConfiguration.class)
  @AutoConfigureBefore(ReactiveUserDetailsServiceAutoConfiguration.class)
  @EnableConfigurationProperties({
      SecurityProperties.class,
      AuthProperties.class})
  @Slf4j
  public class ReactiveInMemoryUserDetailsAutoConfiguration {
  
    /**
     * Creates a reactive user details service bean.
     *
     * @param securityProperties the security properties
     * @param authProperties the auth properties
     * @param passwordEncoder the password encoder
     * @return the map reactive user details service
     */
    @Bean
    public MapReactiveUserDetailsService reactiveUserDetailsService(
        SecurityProperties securityProperties,
        AuthProperties authProperties,
        ObjectProvider<PasswordEncoder> passwordEncoder) {
  
      log.info("\n"
              + "*********************************************************************************\n"
              + "* {} is creating a {}\n"
              + "*********************************************************************************",
          ClassUtils.getUserClass(getClass()).getSimpleName(),
          ClassUtils.getUserClass(MapReactiveUserDetailsService.class).getSimpleName());
  
      return Optional.of(authProperties.buildBasicAuthUserDetails(passwordEncoder.getIfAvailable()))
          .filter(userDetails -> userDetails.length > 0)
          .map(MapReactiveUserDetailsService::new)
          .orElseGet(() -> new ReactiveUserDetailsServiceAutoConfiguration()
              .reactiveUserDetailsService(securityProperties, passwordEncoder));
    }
  
    /**
     * The reactive user details service condition.
     */
    static class ReactiveUserDetailsServiceCondition extends AnyNestedCondition {
  
     /**
      * Instantiates a new Reactive user details service condition.
      */
     ReactiveUserDetailsServiceCondition() {
       super(ConfigurationPhase.REGISTER_BEAN);
     }
 
     /**
      * The type R socket security enabled condition.
      */
     @ConditionalOnBean(type = {
         "org.springframework.messaging.rsocket.annotation.support.RSocketMessageHandler"})
     @SuppressWarnings("unused")
     static class RSocketSecurityEnabledCondition {
 
     }
 
     /**
      * The type Reactive web application condition.
      */
     @ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.REACTIVE)
     @SuppressWarnings("unused")
     static class ReactiveWebApplicationCondition {
 
     }
   }
 
 }