/*
 * Licensed to ElasticSearch and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. ElasticSearch 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.elasticsearch.action.termvector;

import java.util.List;

import org.apache.lucene.index.AtomicReader;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.index.Fields;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.MultiFields;
import org.apache.lucene.index.Term;
import org.elasticsearch.ElasticSearchException;
import org.elasticsearch.action.support.single.shard.TransportShardSingleOperationAction;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.routing.ShardIterator;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.Lucene;
import org.elasticsearch.common.lucene.uid.Versions;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.engine.Engine;
import org.elasticsearch.index.mapper.Uid;
import org.elasticsearch.index.mapper.internal.UidFieldMapper;
import org.elasticsearch.index.service.IndexService;
import org.elasticsearch.index.shard.service.IndexShard;
import org.elasticsearch.indices.IndicesService;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;

/**
 * Performs the get operation.
 */
public class TransportSingleShardTermVectorAction extends TransportShardSingleOperationAction<TermVectorRequest, TermVectorResponse> {

    private final IndicesService indicesService;

    @Inject
    public TransportSingleShardTermVectorAction(Settings settings, ClusterService clusterService, TransportService transportService,
            IndicesService indicesService, ThreadPool threadPool) {
        super(settings, threadPool, clusterService, transportService);
        this.indicesService = indicesService;
    }

    @Override
    protected String executor() {
        // TODO: Is this the right pool to execute this on?
        return ThreadPool.Names.GET;
    }

    @Override
    protected String transportAction() {
        return TermVectorAction.NAME;
    }

    @Override
    protected ClusterBlockException checkGlobalBlock(ClusterState state, TermVectorRequest request) {
        return state.blocks().globalBlockedException(ClusterBlockLevel.READ);
    }

    @Override
    protected ClusterBlockException checkRequestBlock(ClusterState state, TermVectorRequest request) {
        return state.blocks().indexBlockedException(ClusterBlockLevel.READ, request.index());
    }

    @Override
    protected ShardIterator shards(ClusterState state, TermVectorRequest request) {
        return clusterService.operationRouting().getShards(clusterService.state(), request.index(), request.type(), request.id(),
                request.routing(), request.preference());
    }

    @Override
    protected void resolveRequest(ClusterState state, TermVectorRequest request) {
        // update the routing (request#index here is possibly an alias)
        request.routing(state.metaData().resolveIndexRouting(request.routing(), request.index()));
        request.index(state.metaData().concreteIndex(request.index()));
    }

    @Override
    protected TermVectorResponse shardOperation(TermVectorRequest request, int shardId) throws ElasticSearchException {
        IndexService indexService = indicesService.indexServiceSafe(request.index());
        IndexShard indexShard = indexService.shardSafe(shardId);

        final Engine.Searcher searcher = indexShard.searcher();
        IndexReader topLevelReader = searcher.reader();

        final TermVectorResponse termVectorResponse = new TermVectorResponse(request.index(), request.type(), request.id());
        final Term uidTerm = new Term(UidFieldMapper.NAME, Uid.createUidAsBytes(request.type(), request.id()));
        try {
            Fields topLevelFields = MultiFields.getFields(topLevelReader);
            Versions.DocIdAndVersion docIdAndVersion = Versions.loadDocIdAndVersion(topLevelReader, uidTerm);
            if(docIdAndVersion!=null) {
                termVectorResponse.setFields(topLevelReader.getTermVectors(docIdAndVersion.docId), request.selectedFields(),
                        request.getFlags(), topLevelFields);
                termVectorResponse.setDocVersion(docIdAndVersion.version);
            } else {
                
            }

        } catch (Throwable ex) {
            
            throw new ElasticSearchException("failed to execute term vector request", ex);
        } finally {
            searcher.release();
        }
        return termVectorResponse;
    }

    @Override
    protected TermVectorRequest newRequest() {
        return new TermVectorRequest();
    }

    @Override
    protected TermVectorResponse newResponse() {
        return new TermVectorResponse();
    }

}

@@ -4869,16 +4869,17 @@
 dTerm);%0A
+%0A
         
@@ -4884,16 +4884,17 @@
       if
+ 
 (docIdAn
@@ -4905,10 +4905,12 @@
 sion
+ 
 !=
+ 
 null
@@ -4958,30 +4958,48 @@
 tFields(
-topLevelR
+docIdAndVersion.context.r
 eader
+()
 .getTerm

fix term vector api retrieved wrong doc