/*
 * 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.chop.webapp.elasticsearch;

import org.apache.commons.lang.StringUtils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.primitives.Longs;


public class Util {

    private static final Logger LOG = LoggerFactory.getLogger( Util.class );

    private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" );


    public static Date toDate( String dateStr ) {
        Date date = null;

        try {
            date = DATE_FORMAT.parse( dateStr.replaceAll( "T", " " ) );
        }
        catch ( ParseException e ) {
            LOG.error( "Error while converting to date", e );
        }
        return date;
    }


    public static int getInt( Map<String, Object> json, String key ) {
        Number n = ( Number ) json.get( key );
        return n != null ? n.intValue() : 0;
    }


    public static long getLong( Map<String, Object> json, String key ) {

        long n = 0;
        Object v = json.get( key );

        if ( v != null ) {
            n = Longs.tryParse( v.toString() );
        }

        return n;
    }


    public static boolean getBoolean( Map<String, Object> json, String key ) {
        Boolean bool = ( Boolean ) json.get( key );
        return bool != null && bool;
    }


    public static String getString( Map<String, Object> json, String key ) {
        return ( String ) json.get( key );
    }


    /**
     * Converts a string to map. String should have this format: {2=b, 1=a}.
     */
    public static Map<String, String> getMap( Map<String, Object> json, String key ) {

        HashMap<String, String> map = new HashMap<String, String>();
        String str = getString( json, key );

        if ( StringUtils.isEmpty( str )
                || ! str.startsWith( "{" )
                || ! str.endsWith( "}" )
                || str.equals( "{}" ) ) {
            return map;
        }
        String values[] = StringUtils.substringBetween( str, "{", "}" ).split( "," );

        for ( String s : values ) {
            map.put(
                    StringUtils.substringBefore( s, "=" ).trim(),
                    StringUtils.substringAfter( s, "=" ).trim()
            );
        }
        return map;
    }
}