/*
 * Copyright 2012-2018 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.springframework.boot.autoconfigure.solr;

import java.util.Arrays;
import java.util.Optional;

import org.apache.solr.client.solrj.SolrClient;
import org.apache.solr.client.solrj.impl.CloudSolrClient;
import org.apache.solr.client.solrj.impl.HttpSolrClient;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.StringUtils;

/**
 * {@link EnableAutoConfiguration Auto-configuration} for Solr 4.x.
 *
 * @author Christoph Strobl
 * @since 1.1.0
 */
@Configuration
@ConditionalOnClass({ HttpSolrClient.class, CloudSolrClient.class })
@EnableConfigurationProperties(SolrProperties.class)
public class SolrAutoConfiguration {

	private final SolrProperties properties;

	private SolrClient solrClient;

	public SolrAutoConfiguration(SolrProperties properties) {
		this.properties = properties;
	}

	@Bean
	@ConditionalOnMissingBean
	public SolrClient solrClient() {
		this.solrClient = createSolrClient();
		return this.solrClient;
	}

	private SolrClient createSolrClient() {
		if (StringUtils.hasText(this.properties.getZkHost())) {
			return new CloudSolrClient.Builder(Arrays.asList(this.properties.getZkHost()),
					Optional.empty()).build();
		}
		return new HttpSolrClient.Builder(this.properties.getHost()).build();
	}

}
