/*
 * Copyright 2010-2012 Luca Garulli (l.garulli--at--orientechnologies.com)
 *
 * 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 com.orientechnologies.orient.server.network.protocol.http.command.get;

import java.util.ArrayList;
import java.util.List;

import com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.record.ORecord;
import com.orientechnologies.orient.server.network.protocol.http.OHttpRequest;
import com.orientechnologies.orient.server.network.protocol.http.OHttpResponse;
import com.orientechnologies.orient.server.network.protocol.http.command.OServerCommandAuthenticatedDbAbstract;

public class OServerCommandGetCluster extends OServerCommandAuthenticatedDbAbstract {
  private static final String[] NAMES = { "GET|cluster/*" };

  @Override
  public boolean execute(final OHttpRequest iRequest, OHttpResponse iResponse) throws Exception {
    String[] urlParts = checkSyntax(
        iRequest.url,
        3,
        "Syntax error: cluster/<database>/<cluster-name>[/<limit>]<br/>Limit is optional and is setted to 20 by default. Set expressely to 0 to have no limits.");

    iRequest.data.commandInfo = "Browse cluster";
    iRequest.data.commandDetail = urlParts[2];

    ODatabaseDocumentTx db = null;

    try {
      db = getProfiledDatabaseInstance(iRequest);

      if (db.getClusterIdByName(urlParts[2]) == -1)
        throw new IllegalArgumentException("Invalid cluster '" + urlParts[2] + "'");

      final int limit = urlParts.length > 3 ? Integer.parseInt(urlParts[3]) : 20;

      final List<OIdentifiable> response = new ArrayList<OIdentifiable>();
      for (ORecord<?> rec : db.browseCluster(urlParts[2])) {
        if (limit > 0 && response.size() >= limit)
          break;

        response.add(rec);
      }

      iResponse.writeRecords(response);
    } finally {
      if (db != null)
        db.close();
    }
    return false;
  }

  @Override
  public String[] getNames() {
    return NAMES;
  }
}
