import amplitude from 'amplitude-js/amplitude';

/**
 * Initializes Amplitude
 *
 * @param {String} amplitudeApiKey Public API key that should be provided by the consuming frontend.
 * @param {Function} callback If provided, will be called after successful initialization.
 */
export const initAmplitude = (amplitudeApiKey, callback = null) => {
  // passing 2x null here since we don't pass the user ID with the init and don't need any aditional configuration for now
  amplitude.getInstance().init(amplitudeApiKey, null, null, callback);
};

/**
 * Logs an amplitude event
 *
 * @param {Object} trackingData The data that needs to be tracked.
 * @param {Function} callback If provided, will be called after event has been successfully logged.
 */
export const logAmplitudeEvent = (trackingData, callback = null) => {
  const { eventType, eventName, eventProperties } = trackingData;
  const eventProps = {
    ...eventProperties,
    'Event Type': eventType,
  };

  amplitude.getInstance().logEvent(eventName, eventProps, callback);
};

/**
 * Sets the amplitude user ID
 *
 * @param {String} userId The doodle user ID that we save as the amplitude user ID
 */
export const onSetAmplitudeUserId = userId => {
  amplitude.getInstance().setUserId(userId);
};

/**
 * Sets amplitude user properties
 *
 * @param {Object} userProperties Proerties we want to save for the user.
 * @param {Boolean} once If set to true, this will only be set once, initial calls will be ignored.
 */
export const setAmplitudeUserProperties = (userProperties, once = false) => {
  Object.keys(userProperties).forEach(key => {
    const identify = once
      ? new amplitude.Identify().setOnce(key, userProperties[key])
      : new amplitude.Identify().set(key, userProperties[key]);

    amplitude.getInstance().identify(identify);
  });
};

/**
 * Removes a property from an amplitude user.
 *
 * @param {String} userProperty Name of the property we want to remove.
 */
export const unsetAmplitudeUserProperty = userProperty => {
  const identify = new amplitude.Identify().unset(userProperty);
  amplitude.getInstance().identify(identify);
};