/*
 * 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.
 */
package org.apache.usergrid.mongo.commands;


import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.MessageEvent;
import org.apache.usergrid.mongo.MongoChannelHandler;
import org.apache.usergrid.mongo.protocol.OpQuery;
import org.apache.usergrid.mongo.protocol.OpReply;
import org.apache.usergrid.security.shiro.utils.SubjectUtils;

import static org.apache.usergrid.utils.MapUtils.map;


public class ListDatabases extends MongoCommand {

    final static double DEFAULT_SIZE = 1024 * 1024 * 1024.0;


    @SuppressWarnings("unchecked")
    @Override
    public OpReply execute( MongoChannelHandler handler, ChannelHandlerContext ctx, MessageEvent e, OpQuery opQuery ) {
        Set<String> applications = SubjectUtils.getApplications().inverse().keySet();
        List<Map<String, Object>> dbs = new ArrayList<Map<String, Object>>();
        for ( String ns : applications ) {
            dbs.add( ( Map<String, Object> ) map( "name", ns, "sizeOnDisk", DEFAULT_SIZE, "empty", false ) );
        }
        OpReply reply = new OpReply( opQuery );
        reply.addDocument( map( "databases", dbs, "totalSize", 1.0, "ok", 1.0 ) );
        return reply;
    }
}