var SerialPort = require('serialport')

module.exports = function (RED) {
    function testnode(config) {
        RED.nodes.createNode(this, config);
        var node = this;

        node.port = new SerialPort(config.serialport, { baudRate: 9600 })
        node.port.on('error', function (err) {
            node.error(`Error: ${err.message}`)
        })


        function showPortOpen() {
            console.log('port open. Data rate: ' + node.port.baudRate);
        }

        node.port.on('open', showPortOpen);

        function showPortClose() {
            console.log('port closed.');
        }

        node.port.on('close', showPortClose);
        
          receivedData=Buffer.alloc(0)
          node.port.on('readable', function () {
            received = node.port.read()
            receivedData = Buffer.concat([receivedData,received])
            console.log('Data:', received)
            if(receivedData.length > 8)
            {
              console.log('total:', receivedData)
              receivedData=Buffer.alloc(0)
                 
            }

        })
        ergebnis = node.port.read();

        node.on('input', function (msg, send, done) {
            send = send || function () { node.send.apply(node, arguments) }
            node.port.write("test");
            //ergebnis = node.port.read();
            msg.payload = ergebnis;

            if (done) {
                done();
            }


        });

        node.on('close', function () {
            node.port.close();
        });
    }
    RED.nodes.registerType("testnode", testnode);
}