text: import { Tween } from '../tween/tween.babel.js';
  import { Timeline } from '../tween/timeline.babel.js';
  import { Tweenable } from '../tween/tweenable.babel.js';
  import { Delta } from './delta.babel.js';
  import { separateTweenOptions } from './separate-tween-options.babel.js';
  import { parseStaticProperty } from '../helpers/parse-static-property.babel.js';
  // TODO: should point to MotionPath stub
  import { MotionPath } from './motion-path.babel.js';
  
  /* ------------------- */
  /* The `Deltas` class  */
  /* ------------------- */
  
  const Super = Tweenable.__mojsClass;
  const Deltas = Object.create(Super);
  
  /**
   * `init` - function init the class.
   *
   * @extends @Tweenable
   * @public
   */
  Deltas.init = function (o = {}) {
    // super call
    Super.init.call(this, o);
    // clone the options
    const options = { ...o };
    // get `timeline` options and remove them immediately
    const timelineOptions = options.timeline;
    delete options.timeline;
  
    // get `customProperties` options and remove them immediately
    this._customProperties = options.customProperties || {};
    this._render = this._customProperties.render || (() => {});
    this._pipeObj = this._customProperties.pipeObj || {};
    delete options.customProperties;
  
    // save the el object and remove it immediately
    this._el = options.el || {};
    delete options.el;
    delete options.parent; // TODO: cover!
    // create support object for complex properties
    this._supportProps = {};
    // set up the main `tween`
    this._setupTween(options);
    // set up the `timeline`
    this._setupTimeline(timelineOptions);
    // parse deltas from options that left so far
    this._parseProperties(options);
  };
  
  /**
   * `_setupTween` - function to set up main tween.
   *
   * @param {Object} Options.
   */
  Deltas._setupTween = function (options = {}) {
    const support = {
      props: this._supportProps,
      pipeObj: this._pipeObj,
    };
    // separate main tween options
    const tweenOptions = separateTweenOptions(options) || {};
    // create tween
    this.tween = new Tween({
      ...tweenOptions,
      index: this.index,
      // update plain deltas on update
      // and call the previous `onUpdate` if present
      onUpdate: (ep, p, isForward) => {
        // update plain deltas
        this._upd_deltas(ep, p, isForward);
        // render
        this._render(this._el, support, ep, p, isForward);
        // envoke onUpdate if present
        if (tweenOptions.onUpdate !== undefined) {
          tweenOptions.onUpdate(ep, p, isForward);
        }
      },
    });
  };
  
  /**
   * `_setupTimeline` - function to set up main timeline.
   *
   * @param {Object} Timeline options.
   */
  Deltas._setupTimeline = function (options = {}) {
    this.timeline = new Timeline({
      index: this.index,
      ...options,
      onUpdate: (ep, p, isForward) => {
        // envoke onUpdate if present
        if (options.onUpdate !== undefined) {
          options.onUpdate(ep, p, isForward);
        }
      },
    });
    this.timeline.add(this.tween);
  };
  
  /**
   * `_parseProperties` - function to parse deltas and static properties.
   *
   * @param {Object} Options.
   */
  Deltas._parseProperties = function (options) {
    // deltas that have tween
    this._tweenDeltas = [];
    // deltas that don't have tween
    this._plainDeltas = [];
    // static properties
    this._staticProps = {};
    const optionsKeys = Object.keys(options);
    // loop thru options and create deltas with objects
    for (let i = 0; i < optionsKeys.length; i++) {
      const key = optionsKeys[i];
      const value = options[key];
      // if value is tatic save it to static props
      if (typeof value !== 'object') {
        // find out property `el`, it can be `supportProps` if the `isSkipRender`
        // is set for the property in the `customProperties`
        const custom = this._customProperties[key];
        const target = (custom && custom.isSkipRender)
          ? this._supportProps
          : this._el;
  
        const property = parseStaticProperty(
          key,
          value,
          this._customProperties,
          this.index,
          this._totalItemsInStagger,
        );
        this._staticProps[key] = property;
        target[key] = property;
        continue;
      }
  
      // check the delta type
      let delta;
      if (value.path !== undefined) {
        delta = new MotionPath({
          el: this._el,
          ...value,
          supportProps: this._supportProps,
          customProperties: this._customProperties,
          unit: value.unit,
          property: key,
          index: this.index,
        });
      } else {
        // if value is not motion path, create delta object
        delta = new Delta({
          key,
          target: this._el,
          supportProps: this._supportProps,
          object: value,
          customProperties: this._customProperties,
          index: this.index,
        });
      }
  
      // check if delta has own tween and add to `_tweenDeltas`
      if (delta.tween) {
        this._tweenDeltas.push(delta);
      // else add to plain deltas
      } else {
        this._plainDeltas.push(delta);
      }
    }
    // add tween deltas to the timeline
    this.timeline.add(this._tweenDeltas);
  };
  
  /**
   * `_upd_deltas` - function to update the plain deltas.
   *
   * @private
   * @param {Number} Eased progress.
   * @param {Number} Progress.
   * @param {Boolean} If forward update direction.
   * @returns {Object} This delta.
   */
  Deltas._upd_deltas = function (ep, p, isForward) {
    // update plain deltas
    for (let i = 0; i < this._plainDeltas.length; i++) {
      this._plainDeltas[i].update(ep, p, isForward);
    }
  };
  
  /**
   * Imitate `class` with wrapper.
   *
   * @param {Object} Options object.
   * @returns {Object} `Html` instance.
   */
  const wrap = (o) => {
    const instance = Object.create(Deltas);
    instance.init(o);
  
    return instance;
  };
  
  wrap.__mojsClass = Deltas;
  
  export { wrap as Deltas };
  