/**
 * This software is licensed to you under the Apache License, Version 2.0 (the
 * "Apache License").
 *
 * LinkedIn's contributions are made under the Apache License. If you contribute
 * to the Software, the contributions will be deemed to have been made under the
 * Apache License, unless you expressly indicate otherwise. Please do not make any
 * contributions that would be inconsistent with the Apache License.
 *
 * You may obtain a copy of the Apache License at http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, this software
 * distributed under the Apache License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the Apache
 * License for the specific language governing permissions and limitations for the
 * software governed under the Apache License.
 *
 * © 2012 LinkedIn Corp. All Rights Reserved.  
 */
package com.senseidb.gateway.file;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Comparator;
import java.util.Set;

import org.json.JSONObject;

import proj.zoie.impl.indexing.StreamDataProvider;
import proj.zoie.impl.indexing.ZoieConfig;

import com.senseidb.gateway.SenseiGateway;
import com.senseidb.indexing.DataSourceFilter;
import com.senseidb.indexing.ShardingStrategy;

public class LinedFileDataProviderMockBuilder  extends SenseiGateway<String>{

  private Comparator<String> _versionComparator = ZoieConfig.DEFAULT_VERSION_COMPARATOR;


  @Override
  public StreamDataProvider<JSONObject> buildDataProvider(DataSourceFilter<String> dataFilter,
      String oldSinceKey,
      ShardingStrategy shardingStrategy,
      Set<Integer> partitions) throws Exception
  {

    // either file.path or file.classpath must be set
    String path = config.get("file.path");
    File file;
    if (path != null)
    {
      file = new File(path);
    }
    else
    {
      String classpath = config.get("file.classpath");
      if (classpath == null)
        throw new IOException("Either file.path or file.classpath must be set");

      URL url = LinedFileDataProviderBuilder.class.getClassLoader().getResource(classpath);
      if (url == null)
        throw new IOException("Resource not found " + path);
      file = new File(url.toURI());
    }
    if (! file.exists())
      throw new IOException("File " + path + " not found");

    long offset = oldSinceKey == null ? 0L : Long.parseLong(oldSinceKey);

    LinedJsonFileDataProvider provider = new FileDataProviderWithMocks(_versionComparator, file, offset);
    if (dataFilter!=null){
      provider.setFilter(dataFilter);
    }
    return provider;
  }

  @Override
  public Comparator<String> getVersionComparator() {
    return _versionComparator;
  }
}