package org.apache.blur.analysis.type.spatial;

/**
 * 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.
 */
import java.util.Map;

import org.apache.blur.analysis.type.spatial.lucene.TermQueryPrefixTreeStrategy;
import org.apache.hadoop.conf.Configuration;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.core.KeywordAnalyzer;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.spatial.prefix.tree.GeohashPrefixTree;
import org.apache.lucene.spatial.prefix.tree.QuadPrefixTree;
import org.apache.lucene.spatial.query.SpatialOperation;
import org.apache.lucene.util.BytesRef;

import com.spatial4j.core.context.SpatialContext;
import com.spatial4j.core.shape.Point;

public class SpatialTermQueryPrefixTreeStrategyFieldTypeDefinition extends BaseSpatialFieldTypeDefinition {

  private static final String DOC_VALUE = "docValue";
  public static final String NAME = "geo-termprefix";
  private static final Analyzer _keyword = new KeywordAnalyzer();

  @Override
  public String getName() {
    return NAME;
  }

  @Override
  public Analyzer getAnalyzerForIndex(String fieldName) {
    return _keyword;
  }

  @Override
  public void configure(String fieldNameForThisInstance, Map<String, String> properties, Configuration configuration) {
    _ctx = SpatialContext.GEO;
    boolean docValue = false;
    if (properties.get(DOC_VALUE) != null) {
      docValue = true;
    }
    _grid = getSpatialPrefixTree(fieldNameForThisInstance, properties);
    _strategy = new TermQueryPrefixTreeStrategy(_grid, fieldNameForThisInstance, docValue);
    _shapeReadWriter = new ShapeReadWriter<SpatialContext>(_ctx);
    addSupportedIndexedShapes(Point.class);
    addSupportedOperations(SpatialOperation.Intersects);
  }

  @Override
  public Query getCustomQuery(String text) {
    if (_grid instanceof GeohashPrefixTree) {
      if (text.startsWith(GEO_HASH)) {
        int start = text.indexOf(GEO_HASH) + GEO_HASH.length();
        int end = text.indexOf(END, start);
        return new TermQuery(new Term(getFieldName(), text.substring(start, end)));
      }
    } else if (_grid instanceof QuadPrefixTree) {
      if (text.startsWith(QUAD)) {
        int start = text.indexOf(QUAD) + QUAD.length();
        int end = text.indexOf(END, start);
        return new TermQuery(new Term(getFieldName(), text.substring(start, end)));
      }
    }
    return super.getCustomQuery(text);
  }

  @Override
  public String readTerm(BytesRef byteRef) {
    return byteRef.utf8ToString();
  }
}