import 'regenerator-runtime/runtime';

// npm module
import SeeSo, {InitializationErrorType,UserStatusOption} from 'seeso';
let videoStream = null;
const licenseKey = 'input your key'; // Issue license key! -> https://console.seeso.io

// gaze callback.
function onGaze(gazeInfo) {
  // do something with gaze info.
  console.log('onGaze', gazeInfo)
}

function onBlink(timestamp, isBlinkLeft, isBlinkRight, isBlink, leftOpenness, rightOpenness) {
    console.log('Blink! ',timestamp, isBlinkLeft, isBlinkRight, isBlink, leftOpenness, rightOpenness)
}

async function main() {
  videoStream = await navigator.mediaDevices.getUserMedia({'video': true});
  const seeSo = new SeeSo();
  /**
   * set monitor size.    default: 16 inch.
   * set face distance.   default: 30 cm.
   * set camera position. default:
   * camera x: right center
   * cameraOnTop: true
   */
  const option = new UserStatusOption(false, true, false);
  const errCode = await seeSo.initialize(licenseKey, option);  // callback when init failed.)

  if (errCode === InitializationErrorType.ERROR_NONE) {
    seeSo.setMonitorSize(16);
    seeSo.setFaceDistance(50);
    seeSo.setCameraPosition(window.outerWidth / 2, true);
    seeSo.addGazeCallback(onGaze);
    seeSo.addBlinkCallback(onBlink);
    seeSo.startTracking(videoStream);
  }
}

(async () => {
  await main();
})()