/*
 * Copyright 2025 Apollo 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 com.ctrip.framework.apollo.metaservice.service;

import com.ctrip.framework.apollo.core.dto.ServiceDTO;
import com.google.common.collect.Lists;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.util.List;

/**
 * @author : kl
 * Service discovery implementation backed by Spring Cloud DiscoveryClient
 **/
@Service
@Profile({"consul-discovery", "zookeeper-discovery", "nacos-discovery"})
public class SpringCloudInnerDiscoveryService implements DiscoveryService {

  private final DiscoveryClient discoveryClient;

  public SpringCloudInnerDiscoveryService(DiscoveryClient discoveryClient) {
    this.discoveryClient = discoveryClient;
  }


  @Override
  public List<ServiceDTO> getServiceInstances(String serviceId) {
    List<ServiceInstance> instances = discoveryClient.getInstances(serviceId);
    List<ServiceDTO> serviceDTOList = Lists.newLinkedList();
    if (!CollectionUtils.isEmpty(instances)) {
      instances.forEach(instance -> {
        ServiceDTO serviceDTO = this.toServiceDTO(instance, serviceId);
        serviceDTOList.add(serviceDTO);
      });
    }
    return serviceDTOList;
  }

  private ServiceDTO toServiceDTO(ServiceInstance instance, String appName) {
    ServiceDTO service = new ServiceDTO();
    service.setAppName(appName);
    service.setInstanceId(instance.getInstanceId());
    String homePageUrl = "http://" + instance.getHost() + ":" + instance.getPort() + "/";
    service.setHomepageUrl(homePageUrl);
    return service;
  }
}
