package com.ctrip.apollo.biz.service;

 import java.util.Collections;

 import java.util.List;

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

 import org.springframework.stereotype.Service;

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

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

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

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

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

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

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

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

 import com.google.common.base.Strings;

 /**

  * config service for admin

  */

 @Service

 public class ViewService {

   @Autowired

   private ClusterRepository clusterRepository;

   @Autowired

   private NamespaceRepository namespaceRepository;

   @Autowired

   private ItemRepository itemRepository;

   @Autowired

   private ReleaseRepository releaseRepository;

   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;

   }

   public List<Namespace> findNamespaces(String appId, String clusterName) {

     List<Namespace> groups = namespaceRepository.findByAppIdAndClusterName(appId, clusterName);

     if (groups == null) {

       return Collections.emptyList();

     }

     return groups;

   }

   public List<Item> findItems(String appId, String clusterName, String namespaceName) {

     Namespace group = namespaceRepository.findByAppIdAndClusterNameAndNamespaceName(appId, clusterName,

         namespaceName);

     if (group != null) {

       return findItems(group.getId());

     } else {

       return Collections.emptyList();

     }

   }

   public List<Item> findItems(Long namespaceId) {

     List<Item> items = itemRepository.findByNamespaceIdOrderByLineNumAsc(namespaceId);

     if (items == null) {

       return Collections.emptyList();

     }

     return items;

   }

   public List<Release> findReleases(String appId, String clusterName, String namespaceName) {

     List<Release> releases = releaseRepository.findByAppIdAndClusterNameAndNamespaceName(appId,

         clusterName, namespaceName);

     if (releases == null) {

       return Collections.emptyList();

     }

     return releases;

   }

 }