package com.ctrip.apollo.biz.service;

 import java.util.Collections;

 import java.util.List;

 import java.util.Objects;

 import org.springframework.beans.factory.annotation.Autowired;

 import org.springframework.stereotype.Service;

 import org.springframework.transaction.annotation.Transactional;

 import com.ctrip.apollo.biz.entity.Audit;

 import com.ctrip.apollo.biz.entity.Cluster;

 import com.ctrip.apollo.biz.repository.ClusterRepository;

 import com.ctrip.apollo.common.utils.BeanUtils;

 import com.ctrip.apollo.core.ConfigConsts;

 import com.ctrip.apollo.core.exception.ServiceException;

 import com.google.common.base.Strings;

 @Service

 public class ClusterService {

   @Autowired

   private ClusterRepository clusterRepository;

   @Autowired

   private AuditService auditService;

   public boolean isClusterNameUnique(String appId, String clusterName) {

     Objects.requireNonNull(appId, "AppId must not be null");

     Objects.requireNonNull(clusterName, "ClusterName must not be null");

     return Objects.isNull(clusterRepository.findByAppIdAndName(appId, clusterName));

   }

   public Cluster findOne(String appId, String name) {

     return clusterRepository.findByAppIdAndName(appId, name);

   }

   public List<Cluster> findClusters(String appId) {

     if (Strings.isNullOrEmpty(appId)) {

       return Collections.emptyList();

     }

     List<Cluster> clusters = clusterRepository.findByAppId(appId);

     if (clusters == null) {

       return Collections.emptyList();

     }

     return clusters;

   }

   @Transactional

   public Cluster save(Cluster entity) {

     if (!isClusterNameUnique(entity.getAppId(), entity.getName())) {

       throw new ServiceException("cluster not unique");

     }

     Cluster cluster = clusterRepository.save(entity);

     auditService.audit(Cluster.class.getSimpleName(), cluster.getId(), Audit.OP.INSERT,

         cluster.getDataChangeCreatedBy());

     return cluster;

   }

   @Transactional

   public void delete(long id, String owner) {

     clusterRepository.delete(id);

     auditService.audit(Cluster.class.getSimpleName(), id, Audit.OP.DELETE, owner);

   }

   @Transactional

   public Cluster update(Cluster cluster) {

     Cluster managedCluster =

         clusterRepository.findByAppIdAndName(cluster.getAppId(), cluster.getName());

     BeanUtils.copyEntityProperties(cluster, managedCluster);

     managedCluster = clusterRepository.save(managedCluster);

     auditService.audit(Cluster.class.getSimpleName(), managedCluster.getId(), Audit.OP.UPDATE,

         managedCluster.getDataChangeLastModifiedBy());

     return managedCluster;

   }

   @Transactional

   public void createDefaultCluster(String appId, String createBy) {

     if (!isClusterNameUnique(appId, ConfigConsts.CLUSTER_NAME_DEFAULT)) {

       throw new ServiceException("cluster not unique");

     }

     Cluster cluster = new Cluster();

     cluster.setName(ConfigConsts.CLUSTER_NAME_DEFAULT);

     cluster.setAppId(appId);

     cluster.setDataChangeCreatedBy(createBy);

     cluster.setDataChangeLastModifiedBy(createBy);

     clusterRepository.save(cluster);

     auditService.audit(Cluster.class.getSimpleName(), cluster.getId(), Audit.OP.INSERT, createBy);

   }

 }