/*
 * 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.tools;


import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.usergrid.utils.JsonUtils;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;


public class ImportFB extends ToolBase {

    private static final Logger logger = LoggerFactory.getLogger( ImportFB.class );


    @Override
    @SuppressWarnings("static-access")
    public Options createOptions() {

        Option input = OptionBuilder.withArgName( "file" ).hasArg().isRequired()
                                    .withDescription( "JSON file of array of Facebook users" ).create( "i" );

        Option output = OptionBuilder.withArgName( "file" ).hasArg().isRequired()
                                     .withDescription( "JSON file with array of Usergrid users" ).create( "o" );

        Options options = new Options();
        options.addOption( input );
        options.addOption( output );

        return options;
    }


    @SuppressWarnings("unchecked")
    @Override
    public void runTool( CommandLine line ) throws Exception {
        String input = line.getOptionValue( "i" );
        String output = line.getOptionValue( "o" );

        logger.info( "Importing fbusers.json" );

        Object json = JsonUtils.loadFromFilesystem( input );
        Map<String, Object> map = ( Map<String, Object> ) json;
        List<Map<String, Object>> fbusers = ( List<Map<String, Object>> ) map.get( "data" );
        List<Map<String, Object>> users = new ArrayList<Map<String, Object>>();
        for ( Map<String, Object> fbuser : fbusers ) {
            // logger.info(fbuser.get("name"));

            Map<String, Object> user = new LinkedHashMap<String, Object>();
            String name = ( String ) fbuser.get( "name" );
            String username = ( String ) fbuser.get( "username" );
            String picture = ( String ) fbuser.get( "picture" );
            user.put( "name", name );
            if ( username == null ) {
                username = name.replace( ' ', '.' );
            }
            username = username.toLowerCase();
            user.put( "username", username );
            user.put( "picture", picture );
            user.put( "facebook", fbuser );
            users.add( user );
        }
        logger.info( "Imported " + users.size() + " users" );
        // System.out.println(JsonUtils.mapToFormattedJsonString(users));

        try {
            PrintWriter out = new PrintWriter( new File( output ), "UTF-8" );
            out.print( JsonUtils.mapToFormattedJsonString( users ) );
            out.close();
        }
        catch ( IOException e ) {
            e.printStackTrace();
        }
    }
}