/**
 * Copyright 2012 Apache Wave
 *
 * 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 org.waveprotocol.box.server;

import com.google.inject.AbstractModule;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.google.inject.name.Named;

import org.waveprotocol.box.server.persistence.file.FileUtils;
import org.waveprotocol.box.server.persistence.lucene.FSIndexDirectory;
import org.waveprotocol.box.server.persistence.lucene.IndexDirectory;
import org.waveprotocol.box.server.waveserver.LucenePerUserWaveViewHandlerImpl;
import org.waveprotocol.box.server.waveserver.LuceneWaveIndexerImpl;
import org.waveprotocol.box.server.waveserver.MemoryPerUserWaveViewHandlerImpl;
import org.waveprotocol.box.server.waveserver.MemoryWaveIndexerImpl;
import org.waveprotocol.box.server.waveserver.NoOpWaveIndexerImpl;
import org.waveprotocol.box.server.waveserver.PerUserWaveViewBus;
import org.waveprotocol.box.server.waveserver.PerUserWaveViewHandler;
import org.waveprotocol.box.server.waveserver.PerUserWaveViewProvider;
import org.waveprotocol.box.server.waveserver.SearchProvider;
import org.waveprotocol.box.server.waveserver.SimpleSearchProviderImpl;
import org.waveprotocol.box.server.waveserver.WaveIndexer;

/**
 * @author yurize@apache.org (Yuri Zelikov)
 */
public class SearchModule extends AbstractModule {

  private final String searchType;
  private final String indexDirectory;

  @Inject
  public SearchModule(@Named(CoreSettings.SEARCH_TYPE) String searchType,
      @Named(CoreSettings.INDEX_DIRECTORY) String indexDirectory) {
    this.searchType = searchType;
    this.indexDirectory = indexDirectory;
  }

  @Override
  public void configure() {
    bind(SearchProvider.class).to(SimpleSearchProviderImpl.class).in(Singleton.class);
    if ("lucene".equals(searchType)) {
      bind(PerUserWaveViewProvider.class).to(LucenePerUserWaveViewHandlerImpl.class).in(
          Singleton.class);
      bind(PerUserWaveViewBus.Listener.class).to(LucenePerUserWaveViewHandlerImpl.class).in(
          Singleton.class);
      bind(PerUserWaveViewHandler.class).to(LucenePerUserWaveViewHandlerImpl.class).in(
          Singleton.class);
      bind(IndexDirectory.class).to(FSIndexDirectory.class);
      if (!FileUtils.isDirExistsAndNonEmpty(indexDirectory)) {
        bind(WaveIndexer.class).to(LuceneWaveIndexerImpl.class);
      } else {
        bind(WaveIndexer.class).to(NoOpWaveIndexerImpl.class);
      }
    } else if ("memory".equals(searchType)) {
      bind(PerUserWaveViewProvider.class).to(MemoryPerUserWaveViewHandlerImpl.class).in(
          Singleton.class);
      bind(PerUserWaveViewBus.Listener.class).to(MemoryPerUserWaveViewHandlerImpl.class).in(
          Singleton.class);
      bind(PerUserWaveViewHandler.class).to(MemoryPerUserWaveViewHandlerImpl.class).in(
          Singleton.class);
      bind(WaveIndexer.class).to(MemoryWaveIndexerImpl.class).in(Singleton.class);
    } else {
      throw new RuntimeException("Unknown search type: " + searchType);
    }
  }
}