module.exports = (RED) => {
  function MbusOut(config) {
    RED.nodes.createNode(this, config);

    this.name = config.name;

    const client = RED.nodes.getNode(config.client);
    const node = this;

    // ----- EVENTS HANDLERS ----------------------------------------------------

    const subscribedEvents = {
      mbError: onError,
      mbClose: onClose,
      mbConnect: onConnect,
      mbReconnect: onReconnect,
      mbScan: onScan,
      mbScanComplete: onScanComplete,
      mbDeviceUpdated: onDeviceUpdated,
      mbDevicesLoaded: onDevicesLoaded,
      mbPrimarySet: onPrimarySet,

    };

    function onConnect() {
      setStatus('Connected', 'success');
    }

    function onError(failureMsg) {
      setStatus(`Error: ${failureMsg}`, 'error');
    }

    function onClose() {
      setStatus('Closed', 'error');
    }

    function onScan() {
      setStatus('Scanning devices...', 'info');
    }

    function onScanComplete(devices) {
      setStatus(`Scan complete, ${devices.length} devices found`, 'success');
      node.send({ topic: 'mbScanComplete', payload: devices });
    }

    function onDeviceUpdated(device) {
      setStatus(`Device ${device.SlaveInformation.Id} updated`, 'success');
      node.send({ topic: 'mbDeviceUpdated', payload: device });
    }

    function onPrimarySet(data) {
      setStatus(`Device ${data.old} successfully set to primary ID ${data.new}`, 'success');
      node.send({ topic: 'mbPrimarySet', payload: data });
    }

    function onDevicesLoaded(devices) {
      setStatus(`${devices.length} devices loaded from file`, 'success');
      node.send({ topic: 'mbDevicesLoaded', payload: devices });
    }

    function onReconnect() {
      setStatus('Reconnecting...', 'warning');
    }

    // ----- SUBSCRIBE TO CLIENT EVENTS -----------------------------------------
    if (client) {
      // update status
      subscribedEvents[client.getStatus().event]();

      client.registerForMbus(node);

      Object.keys(subscribedEvents).forEach((evt) => {
        client.on(evt, subscribedEvents[evt]);
      });
    }

    // Set node status
    function setStatus(message, type) {
      const types = {
        info: 'blue', error: 'red', warning: 'yellow', success: 'green',
      };

      node.status({
        fill: types[type] || 'grey',
        shape: 'dot',
        text: message,
      });
    }
  }// end mbus out

  RED.nodes.registerType('mbus-out', MbusOut);
};