content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.apache.ambari.server.controller.internal;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.EnumSet;
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.DuplicateResourceException;
  import org.apache.ambari.server.StaticallyInject;
  import org.apache.ambari.server.configuration.Configuration;
  import org.apache.ambari.server.controller.predicate.EqualsPredicate;
  import org.apache.ambari.server.controller.spi.NoSuchParentResourceException;
  import org.apache.ambari.server.controller.spi.NoSuchResourceException;
  import org.apache.ambari.server.controller.spi.Predicate;
  import org.apache.ambari.server.controller.spi.Request;
  import org.apache.ambari.server.controller.spi.RequestStatus;
  import org.apache.ambari.server.controller.spi.Resource;
  import org.apache.ambari.server.controller.spi.ResourceAlreadyExistsException;
  import org.apache.ambari.server.controller.spi.SystemException;
  import org.apache.ambari.server.controller.spi.UnsupportedPropertyException;
  import org.apache.ambari.server.orm.dao.RemoteAmbariClusterDAO;
  import org.apache.ambari.server.orm.entities.RemoteAmbariClusterEntity;
  import org.apache.ambari.server.orm.entities.RemoteAmbariClusterServiceEntity;
  import org.apache.ambari.server.security.authorization.RoleAuthorization;
  import org.apache.ambari.server.view.RemoteAmbariClusterRegistry;
  import org.apache.ambari.view.MaskException;
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.common.base.Strings;
  import com.google.common.collect.ImmutableMap;
  import com.google.common.collect.Sets;
  import com.google.inject.Inject;
  
  /**
   *  Resource Provider for Remote Cluster
   */
  @StaticallyInject
  public class RemoteClusterResourceProvider extends AbstractAuthorizedResourceProvider {
  
    /**
     * Remote Cluster property id constants.
     */
    public static final String CLUSTER_NAME_PROPERTY_ID = "ClusterInfo/name";
    public static final String CLUSTER_ID_PROPERTY_ID = "ClusterInfo/cluster_id";
    public static final String CLUSTER_URL_PROPERTY_ID  = "ClusterInfo/url";
    public static final String USERNAME_PROPERTY_ID = "ClusterInfo/username";
    public static final String PASSWORD_PROPERTY_ID = "ClusterInfo/password";
    public static final String SERVICES_PROPERTY_ID = "ClusterInfo/services";
  
    /**
     * The logger.
     */
    private final static Logger LOG = LoggerFactory.getLogger(RemoteClusterResourceProvider.class);
  
    /**
     * The key property ids for a Remote Cluster resource.
     */
    private static final Map<Resource.Type, String> keyPropertyIds = ImmutableMap.<Resource.Type, String>builder()
        .put(Resource.Type.RemoteCluster, CLUSTER_NAME_PROPERTY_ID)
        .build();
  
    /**
     * The property ids for a Remote Cluster resource.
     */
    private static final Set<String> propertyIds = Sets.newHashSet(
        CLUSTER_NAME_PROPERTY_ID,
        CLUSTER_ID_PROPERTY_ID,
        CLUSTER_URL_PROPERTY_ID,
        USERNAME_PROPERTY_ID,
        PASSWORD_PROPERTY_ID,
        SERVICES_PROPERTY_ID);
  
    @Inject
    private static RemoteAmbariClusterDAO remoteAmbariClusterDAO;
  
    @Inject
    private static Configuration configuration;
  
    @Inject
    private static RemoteAmbariClusterRegistry remoteAmbariClusterRegistry;
  
    /**
     * Create a  new resource provider.
     */
    protected RemoteClusterResourceProvider() {
      super(Resource.Type.RemoteCluster, propertyIds, keyPropertyIds);
  
      EnumSet<RoleAuthorization> requiredAuthorizations = EnumSet.of(RoleAuthorization.AMBARI_ADD_DELETE_CLUSTERS);
      setRequiredCreateAuthorizations(requiredAuthorizations);
      setRequiredDeleteAuthorizations(requiredAuthorizations);
      setRequiredUpdateAuthorizations(requiredAuthorizations);
    }
  
    @Override
    public Map<Resource.Type, String> getKeyPropertyIds() {
      return keyPropertyIds;
    }
  
    @Override
    protected Set<String> getPKPropertyIds() {
      return new HashSet<>(keyPropertyIds.values());
    }
  
    @Override
    public RequestStatus createResourcesAuthorized(Request request) throws SystemException, UnsupportedPropertyException, ResourceAlreadyExistsException, NoSuchParentResourceException {
      for (Map<String, Object> properties : request.getProperties()) {
        createResources(getCreateCommand(properties));
      }
      notifyCreate(Resource.Type.RemoteCluster, request);
  
      return getRequestStatus(null);
    }
  
    @Override
    public Set<Resource> getResources(Request request, Predicate predicate) throws SystemException, UnsupportedPropertyException, NoSuchResourceException, NoSuchParentResourceException {
      Set<Resource> resources    = new HashSet<>();
      Set<String>   requestedIds = getRequestPropertyIds(request, predicate);
  
      Set<Map<String, Object>> propertyMaps = getPropertyMaps(predicate);
      if (propertyMaps.isEmpty()) {
        propertyMaps.add(Collections.emptyMap());
      }
  
      for (Map<String, Object> propertyMap : propertyMaps) {
  
        String clusterName = (String) propertyMap.get(CLUSTER_NAME_PROPERTY_ID);
  
        if(!Strings.isNullOrEmpty(clusterName)){
          RemoteAmbariClusterEntity cluster = remoteAmbariClusterDAO.findByName(clusterName);
          if(cluster == null) {
            throw new NoSuchResourceException(String.format("Cluster with name %s cannot be found",clusterName) );
          }
          resources.add(toResource(requestedIds, cluster));
        }else {
          for (RemoteAmbariClusterEntity cluster : remoteAmbariClusterDAO.findAll()){
            Resource resource = toResource(requestedIds, cluster);
            resources.add(resource);
          }
        }
      }
      return resources;
    }
  
    protected Resource toResource(Set<String> requestedIds, RemoteAmbariClusterEntity cluster) {
      Resource   resource   = new ResourceImpl(Resource.Type.RemoteCluster);
      setResourceProperty(resource, CLUSTER_NAME_PROPERTY_ID, cluster.getName(), requestedIds);
      setResourceProperty(resource, CLUSTER_ID_PROPERTY_ID, cluster.getId(), requestedIds);
      setResourceProperty(resource, CLUSTER_URL_PROPERTY_ID, cluster.getUrl(), requestedIds);
      setResourceProperty(resource, USERNAME_PROPERTY_ID, cluster.getUsername(), requestedIds);
      ArrayList<String> services = new ArrayList<>();
      for (RemoteAmbariClusterServiceEntity remoteClusterServiceEntity : cluster.getServices()) {
        services.add(remoteClusterServiceEntity.getServiceName());
      }
      setResourceProperty(resource, SERVICES_PROPERTY_ID,services, requestedIds);
      return resource;
    }
  
    @Override
    public RequestStatus updateResourcesAuthorized(Request request, Predicate predicate) throws SystemException, UnsupportedPropertyException, NoSuchResourceException, NoSuchParentResourceException {
      Iterator<Map<String,Object>> iterator = request.getProperties().iterator();
      if (iterator.hasNext()) {
        for (Map<String, Object> propertyMap : getPropertyMaps(iterator.next(), predicate)) {
          modifyResources(getUpdateCommand(propertyMap));
        }
      }
      notifyUpdate(Resource.Type.RemoteCluster, request, predicate);
  
      return getRequestStatus(null);
    }
  
    @Override
    protected RequestStatus deleteResourcesAuthorized(Request request, Predicate predicate)
      throws SystemException, UnsupportedPropertyException, NoSuchResourceException, NoSuchParentResourceException {
  
      modifyResources(getDeleteCommand(predicate));
      notifyDelete(Resource.Type.ViewInstance, predicate);
      return getRequestStatus(null);
  
    }
  
    /**
     * Get the command to create the RemoteAmbariCluster
     * @param properties
     * @return A command to create the RemoteAmbariCluster
     */
    private Command<Void> getCreateCommand(final Map<String, Object> properties) {
      return new Command<Void>() {
        @Override
        public Void invoke() throws AmbariException {
          String name = (String)properties.get(CLUSTER_NAME_PROPERTY_ID);
  
          if(StringUtils.isEmpty(name)){
            throw new IllegalArgumentException("Cluster Name cannot ne null or Empty");
          }
  
          if(remoteAmbariClusterDAO.findByName(name) != null){
            throw new DuplicateResourceException(String.format("Remote cluster with name %s already exists",name));
          }
  
          saveOrUpdateRemoteAmbariClusterEntity(properties,false);
  
          return null;
        }
      };
    }
  
    /**
     * Get the command to update the RemoteAmbariCluster
     * @param properties
     * @return A command to update the RemoteAmbariCluster
     */
    private Command<Void> getUpdateCommand(final Map<String, Object> properties) {
      return new Command<Void>() {
        @Override
        public Void invoke() throws AmbariException {
          String name = (String)properties.get(CLUSTER_NAME_PROPERTY_ID);
  
          if (StringUtils.isEmpty(name)) {
            throw new IllegalArgumentException("Cluster Name cannot be null or Empty");
          }
  
          String id = (String)properties.get(CLUSTER_ID_PROPERTY_ID);
  
          if (StringUtils.isEmpty(id)) {
            throw new IllegalArgumentException("Cluster Id cannot be null or Empty");
          }
  
          saveOrUpdateRemoteAmbariClusterEntity(properties,true);
          return null;
  
        }
      };
    }
  
    /**
     *  Save or update Remote Ambari Cluster Entity to database
     *
     * @param properties
     * @param update
     * @throws AmbariException
     */
    private void saveOrUpdateRemoteAmbariClusterEntity(Map<String, Object> properties,boolean update) throws AmbariException {
      String name = (String)properties.get(CLUSTER_NAME_PROPERTY_ID);
      String url = (String)properties.get(CLUSTER_URL_PROPERTY_ID);
      String username = (String)properties.get(USERNAME_PROPERTY_ID);
      String password = (String)properties.get(PASSWORD_PROPERTY_ID);
  
      if (StringUtils.isEmpty(url) && StringUtils.isEmpty(username)) {
        throw new IllegalArgumentException("Url or username cannot be null");
      }
  
      RemoteAmbariClusterEntity entity ;
  
      if (update) {
        Long id = Long.valueOf((String) properties.get(CLUSTER_ID_PROPERTY_ID));
        entity = remoteAmbariClusterDAO.findById(id);
        if (entity == null) {
          throw new IllegalArgumentException(String.format("Cannot find cluster with Id : \"%s\"", id));
        }
      } else {
  
        entity = remoteAmbariClusterDAO.findByName(name);
        if (entity != null) {
          throw new DuplicateResourceException(String.format("Cluster with name : \"%s\" already exists", name));
        }
      }
  
      // Check Password not null for create
      //Check username matches the entity username if password not present
      if(StringUtils.isBlank(password) && !update){
        throw new IllegalArgumentException("Password cannot be null");
      }else if(StringUtils.isBlank(password) && update && !username.equals(entity.getUsername())){
        throw new IllegalArgumentException("Failed to update. Username does not match.");
      }
  
      if (entity == null) {
        entity = new RemoteAmbariClusterEntity();
      }
  
      entity.setName(name);
      entity.setUrl(url);
      try {
        if (password != null) {
          entity.setUsername(username);
          entity.setPassword(password);
        }
      } catch (MaskException e) {
        throw new IllegalArgumentException("Failed to create new Remote Cluster " + name + ". Illegal Password");
      }
  
      try {
        remoteAmbariClusterRegistry.saveOrUpdate(entity,update);
      } catch (Exception e) {
        throw new IllegalArgumentException("Failed to create new Remote Cluster " + name +". " + e.getMessage(),e);
      }
    }
  
    /**
     * Get the command to delete the Cluster
     * @param predicate
     * @return The delete command
     */
    private Command<Void> getDeleteCommand(final Predicate predicate) {
      return new Command<Void>() {
        @Override
        public Void invoke() throws AmbariException {
          Comparable deletedCluster = ((EqualsPredicate) predicate).getValue();
          String toDelete = deletedCluster.toString();
          RemoteAmbariClusterEntity clusterEntity = remoteAmbariClusterDAO.findByName(toDelete);
          if(clusterEntity == null){
            throw new IllegalArgumentException("The Cluster "+ toDelete +" does not exist");
          }
  
          remoteAmbariClusterRegistry.delete(clusterEntity);
          return null;
        }
      };
    }
  }
  