/**
 * Created by fwang1 on 3/25/15.
 */
module.exports = function(RED) {
    /*
     *   Kafka Producer
     *   Parameters:
     - topics
     - zkquorum(example: zkquorum = “[host]:2181")
     */
    function kafkaNodeK(config) {
        RED.nodes.createNode(this,config);
        var topic = config.topic;
        var clusterZookeeper = config.zkquorum;
        var key = config.key;
        var debug = (config.debug == "debug");
        var node = this;
        var kafka = require('kafka-node');
        var HighLevelProducer = kafka.HighLevelProducer;
        var Client = kafka.Client;
        var topics = config.topics;
        var client = new Client(clusterZookeeper);

        try {
            this.on("input", function(msg) {
                var payloads = [];

                // check if multiple topics
                if (topics.indexOf(",") > -1){
                    var topicArry = topics.split(',');

                    for (i = 0; i < topicArry.length; i++) {
                        payloads.push({topic: topicArry[i], messages: msg.payload});
                    }
                }
                else {
                    KeyedMessage = kafka.KeyedMessage;
            //json = JSON.parse(msg.payload)
                    //km = new KeyedMessage(key,json);
            km = new KeyedMessage(key,msg.payload);
                    payloads = [{topic: topics, messages: km}];
                }

                producer.send(payloads, function(err, data){
                    if (err){
                        node.error(err);
                    }
                    node.log("Message Sent: " + data);
                });
            });
        }
        catch(e) {
            node.error(e);
        }
        var producer = new HighLevelProducer(client);
        this.status({fill:"green",shape:"dot",text:"connected to "+clusterZookeeper});
    }

    RED.nodes.registerType("kafkaKey",kafkaNodeK);

};