/*
 * Copyright 2013-2021 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
 *
 *      https://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.springframework.cloud.sleuth.autoconfig.brave.instrument.web.client;

import brave.http.HttpTracing;
import brave.httpasyncclient.TracingHttpAsyncClientBuilder;
import brave.httpclient.TracingHttpClientBuilder;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.nio.client.HttpAsyncClientBuilder;

import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.cloud.commons.httpclient.HttpClientConfiguration;
import org.springframework.cloud.sleuth.autoconfig.instrument.web.client.ConditionalnOnSleuthWebClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

/**
 * {@link org.springframework.boot.autoconfigure.EnableAutoConfiguration
 * Auto-configuration} enables span information propagation when using
 * {@link RestTemplate}.
 *
 * @author Marcin Grzejszczak
 * @since 1.0.0
 */
@Configuration(proxyBeanMethods = false)
@ConditionalnOnSleuthWebClient
@ConditionalOnBean(HttpTracing.class)
@AutoConfigureBefore(HttpClientConfiguration.class)
public class BraveWebClientAutoConfiguration {

	@Configuration(proxyBeanMethods = false)
	@ConditionalOnClass(HttpClientBuilder.class)
	static class HttpClientBuilderConfig {

		@Bean
		@ConditionalOnMissingBean
		HttpClientBuilder traceHttpClientBuilder(HttpTracing httpTracing) {
			return TracingHttpClientBuilder.create(httpTracing);
		}

	}

	@Configuration(proxyBeanMethods = false)
	@ConditionalOnClass(HttpAsyncClientBuilder.class)
	static class HttpAsyncClientBuilderConfig {

		@Bean
		@ConditionalOnMissingBean
		HttpAsyncClientBuilder traceHttpAsyncClientBuilder(HttpTracing httpTracing) {
			return TracingHttpAsyncClientBuilder.create(httpTracing);
		}

	}

}
