'use strict';

var init = require('./init.js');
var handlers = require('./handlers.js');

const API = {
  /**
   * Factory method for initializing @doodle/tracking library, returning an instance of an API
   *
   * @public
   * @param {Object} options This contains fields for either imperative or declarative (data attributes based) tracking
   * @param {string} options.amplitudeApiKey A tracking intent
   * @param {Object} [options.services] An HTML element with tracking data attributes
   * @return {API} An initialized instance of API class
   */
  init(options) {
    // eslint-disable-next-line global-require
    const {
      initTracking
    } = init;
    initTracking(options);
    this.options = options;
    return this;
  },

  /**
   * Client method for tracking
   *
   * It may be called either with a trackingIntent or with a trackingEl, which carries tracking data attributes
   * In case both are passed: trackingIntent is preferred
   *
   * @public
   * @async
   * @param {Object} payload This contains fields for either imperative or declarative (data attributes based) tracking
   * @param {TrackingIntent} [payload.trackingIntent] A tracking intent
   * @param {HTMLElement} [payload.trackingEl] An HTML element with tracking data attributes
   * @param {MouseEvent} [payload.event] A click event to be cancelled in case of same tab links
   * @return {Promise<void>}
   */
  track({
    trackingIntent,
    trackingEl,
    event
  } = {}) {
    return handlers.handleTrack({
      trackingIntent,
      trackingEl,
      event
    }, this.options);
  },

  /**
   * Client method user identification
   *
   * @public
   * @async
   * @param {Object} [payload]
   * @param {TrackingIntent} [payload.trackingIntent] An object with same interface accepted by getTrackingDataAttrs, useful for
   * imperative tracking
   * @param {HTMLElement} [payload.trackingEl] An HTML element to inspect
   * @return {Promise<void>}
   */
  identify({
    trackingIntent,
    trackingEl
  } = {}) {
    return handlers.handleIdentify({
      trackingIntent,
      trackingEl
    });
  }

};

module.exports = API;
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