/**
 * 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.blur.slur;

import java.util.List;

import org.apache.blur.thrift.generated.BlurResult;
import org.apache.blur.thrift.generated.BlurResults;
import org.apache.blur.thrift.generated.Column;
import org.apache.blur.thrift.generated.FetchRecordResult;
import org.apache.blur.thrift.generated.Record;
import org.apache.blur.utils.BlurConstants;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.common.SolrDocumentList;

public class BlurResultHelper {

  public static SolrDocumentList from(BlurResults results) {
    SolrDocumentList docResults = new SolrDocumentList();

    convertMetadata(results, docResults);

    convertRows(results.getResults(), docResults);

    return docResults;
  }

  private static void convertRows(List<BlurResult> results, SolrDocumentList docResults) {
    for (BlurResult result : results) {
      docResults.add(convertRecord(result.getFetchResult().getRecordResult()));
    }

  }

  private static SolrDocument convertRecord(FetchRecordResult recResult) {
    SolrDocument doc = new SolrDocument();
    Record record = recResult.getRecord();

    doc.addField(BlurConstants.RECORD_ID, record.getRecordId());

    for (Column col : record.getColumns()) {
      doc.addField(joinColumnFamily(record.getFamily(), col.getName()), col.getValue());
    }

    return doc;
  }

  private static String joinColumnFamily(String family, String name) {
    if (family != null) {
      return family + "." + name;
    }
    return name;
  }

  private static void convertMetadata(BlurResults results, SolrDocumentList docResults) {
    docResults.setNumFound(results.getTotalResults());
    docResults.setStart(results.getQuery().getStart());
  }
}