/*
 * #!
 * Ontopia Engine
 * #-
 * Copyright (C) 2001 - 2017 The Ontopia Project
 * #-
 * Licensed 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 net.ontopia.infoset.fulltext.impl.basic;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import net.ontopia.infoset.fulltext.core.DocumentIF;
import net.ontopia.infoset.fulltext.core.GenericDocument;
import net.ontopia.infoset.fulltext.core.GenericField;
import net.ontopia.infoset.fulltext.core.SearchResultIF;
import net.ontopia.infoset.fulltext.core.SearcherIF;
import net.ontopia.topicmaps.core.OccurrenceIF;
import net.ontopia.topicmaps.core.TopicIF;
import net.ontopia.topicmaps.core.TopicMapIF;
import net.ontopia.topicmaps.core.TopicNameIF;
import net.ontopia.topicmaps.core.VariantNameIF;
import net.ontopia.topicmaps.impl.basic.InMemoryTopicMapStore;
import net.ontopia.topicmaps.impl.utils.AbstractIndexManager;

/**
 * A SearcherIF implementation meant for test purposes.
 */
public class DummyFulltextSearcherIF implements SearcherIF {

  private final TopicMapIF tm;

  public DummyFulltextSearcherIF(InMemoryTopicMapStore store) {
    ((AbstractIndexManager) store.getTransaction().getIndexManager())
        .registerIndex("net.ontopia.infoset.fulltext.core.SearcherIF", this);
    this.tm = store.getTopicMap();
  }

  @Override
  public SearchResultIF search(String query) throws IOException {
    String _query = query.toLowerCase();
    final List<DocumentIF> hits = new ArrayList<DocumentIF>();
    for (TopicIF topic : tm.getTopics()) {
      for (OccurrenceIF occurrence : topic.getOccurrences()) {
        if (occurrence.getValue().toLowerCase().contains(_query)) {
          DocumentIF d = new GenericDocument();
          d.addField(new GenericField("object_class", "O", true, true, false));
          d.addField(new GenericField("object_id", occurrence.getObjectId(), true, true, false));
          hits.add(d);
        }
      }
      for (TopicNameIF name : topic.getTopicNames()) {
        if (name.getValue().toLowerCase().contains(_query)) {
          DocumentIF d = new GenericDocument();
          d.addField(new GenericField("object_class", "B", true, true, false));
          d.addField(new GenericField("object_id", name.getObjectId(), true, true, false));
          hits.add(d);
        }
        for (VariantNameIF var : name.getVariants()) {
          if (var.getValue().toLowerCase().contains(_query)) {
            DocumentIF d = new GenericDocument();
            d.addField(new GenericField("object_class", "V", true, true, false));
            d.addField(new GenericField("object_id", var.getObjectId(), true, true, false));
            hits.add(d);
          }
        }
      }
    }
    return new SearchResultIF() {
      public DocumentIF getDocument(int hit) throws IOException {
        return hits.get(hit);
      }

      public float getScore(int hit) throws IOException {
        return 1;
      }

      public int hits() throws IOException {
        return hits.size();
      }
    };
  }

  @Override
  public void close() throws IOException {
    // nothing
  }
}