function RepeaterModifier() {}
extendPrototype([ShapeModifier], RepeaterModifier);

RepeaterModifier.prototype.initModifierProperties = function (elem, data) {
  this.getValue = this.processKeys;
  this.c = PropertyFactory.getProp(elem, data.c, 0, null, this);
  this.o = PropertyFactory.getProp(elem, data.o, 0, null, this);
  this.tr = TransformPropertyFactory.getTransformProperty(elem, data.tr, this);
  this.so = PropertyFactory.getProp(elem, data.tr.so, 0, 0.01, this);
  this.eo = PropertyFactory.getProp(elem, data.tr.eo, 0, 0.01, this);
  this.data = data;
  if (!this.dynamicProperties.length) {
    this.getValue(true);
  }
  this._isAnimated = !!this.dynamicProperties.length;
  this.pMatrix = new Matrix();
  this.rMatrix = new Matrix();
  this.sMatrix = new Matrix();
  this.tMatrix = new Matrix();
  this.matrix = new Matrix();
};

RepeaterModifier.prototype.applyTransforms = function (pMatrix, rMatrix, sMatrix, transform, perc, inv) {
  var dir = inv ? -1 : 1;
  var scaleX = transform.s.v[0] + (1 - transform.s.v[0]) * (1 - perc);
  var scaleY = transform.s.v[1] + (1 - transform.s.v[1]) * (1 - perc);
  pMatrix.translate(transform.p.v[0] * dir * perc, transform.p.v[1] * dir * perc, transform.p.v[2]);
  rMatrix.translate(-transform.a.v[0], -transform.a.v[1], transform.a.v[2]);
  rMatrix.rotate(-transform.r.v * dir * perc);
  rMatrix.translate(transform.a.v[0], transform.a.v[1], transform.a.v[2]);
  sMatrix.translate(-transform.a.v[0], -transform.a.v[1], transform.a.v[2]);
  sMatrix.scale(inv ? 1 / scaleX : scaleX, inv ? 1 / scaleY : scaleY);
  sMatrix.translate(transform.a.v[0], transform.a.v[1], transform.a.v[2]);
};

RepeaterModifier.prototype.init = function (elem, arr, pos, elemsData) {
  this.elem = elem;
  this.arr = arr;
  this.pos = pos;
  this.elemsData = elemsData;
  this._currentCopies = 0;
  this._elements = [];
  this._groups = [];
  this.frameId = -1;
  this.initDynamicPropertyContainer(elem);
  this.initModifierProperties(elem, arr[pos]);
  var cont = 0;
  while (pos > 0) {
    pos -= 1;
    // this._elements.unshift(arr.splice(pos,1)[0]);
    this._elements.unshift(arr[pos]);
    cont += 1;
  }
  if (this.dynamicProperties.length) {
    this.k = true;
  } else {
    this.getValue(true);
  }
};

RepeaterModifier.prototype.resetElements = function (elements) {
  var i, len = elements.length;
  for (i = 0; i < len; i += 1) {
    elements[i]._processed = false;
    if (elements[i].ty === 'gr') {
      this.resetElements(elements[i].it);
    }
  }
};

RepeaterModifier.prototype.cloneElements = function (elements) {
  var i, len = elements.length;
  var newElements = JSON.parse(JSON.stringify(elements));
  this.resetElements(newElements);
  return newElements;
};

RepeaterModifier.prototype.changeGroupRender = function (elements, renderFlag) {
  var i, len = elements.length;
  for (i = 0; i < len; i += 1) {
    elements[i]._render = renderFlag;
    if (elements[i].ty === 'gr') {
      this.changeGroupRender(elements[i].it, renderFlag);
    }
  }
};

RepeaterModifier.prototype.processShapes = function (_isFirstFrame) {
  var items, itemsTransform, i, dir, cont;
  if (this._mdf || _isFirstFrame) {
    var copies = Math.ceil(this.c.v);
    if (this._groups.length < copies) {
      while (this._groups.length < copies) {
        var group = {
          it: this.cloneElements(this._elements),
          ty: 'gr',
        };
        group.it.push({ a: { a: 0, ix: 1, k: [0, 0] }, nm: 'Transform', o: { a: 0, ix: 7, k: 100 }, p: { a: 0, ix: 2, k: [0, 0] }, r: { a: 1, ix: 6, k: [{ s: 0, e: 0, t: 0 }, { s: 0, e: 0, t: 1 }] }, s: { a: 0, ix: 3, k: [100, 100] }, sa: { a: 0, ix: 5, k: 0 }, sk: { a: 0, ix: 4, k: 0 }, ty: 'tr' });

        this.arr.splice(0, 0, group);
        this._groups.splice(0, 0, group);
        this._currentCopies += 1;
      }
      this.elem.reloadShapes();
    }
    cont = 0;
    var renderFlag;
    for (i = 0; i <= this._groups.length - 1; i += 1) {
      renderFlag = cont < copies;
      this._groups[i]._render = renderFlag;
      this.changeGroupRender(this._groups[i].it, renderFlag);
      cont += 1;
    }

    this._currentCopies = copies;
    /// /

    var offset = this.o.v;
    var offsetModulo = offset % 1;
    var roundOffset = offset > 0 ? Math.floor(offset) : Math.ceil(offset);
    var k;
    var tMat = this.tr.v.props;
    var pProps = this.pMatrix.props;
    var rProps = this.rMatrix.props;
    var sProps = this.sMatrix.props;
    this.pMatrix.reset();
    this.rMatrix.reset();
    this.sMatrix.reset();
    this.tMatrix.reset();
    this.matrix.reset();
    var iteration = 0;

    if (offset > 0) {
      while (iteration < roundOffset) {
        this.applyTransforms(this.pMatrix, this.rMatrix, this.sMatrix, this.tr, 1, false);
        iteration += 1;
      }
      if (offsetModulo) {
        this.applyTransforms(this.pMatrix, this.rMatrix, this.sMatrix, this.tr, offsetModulo, false);
        iteration += offsetModulo;
      }
    } else if (offset < 0) {
      while (iteration > roundOffset) {
        this.applyTransforms(this.pMatrix, this.rMatrix, this.sMatrix, this.tr, 1, true);
        iteration -= 1;
      }
      if (offsetModulo) {
        this.applyTransforms(this.pMatrix, this.rMatrix, this.sMatrix, this.tr, -offsetModulo, true);
        iteration -= offsetModulo;
      }
    }
    i = this.data.m === 1 ? 0 : this._currentCopies - 1;
    dir = this.data.m === 1 ? 1 : -1;
    cont = this._currentCopies;
    var j, jLen;
    while (cont) {
      items = this.elemsData[i].it;
      itemsTransform = items[items.length - 1].transform.mProps.v.props;
      jLen = itemsTransform.length;
      items[items.length - 1].transform.mProps._mdf = true;
      items[items.length - 1].transform.op._mdf = true;
      items[items.length - 1].transform.op.v = this.so.v + (this.eo.v - this.so.v) * (i / (this._currentCopies - 1));
      if (iteration !== 0) {
        if ((i !== 0 && dir === 1) || (i !== this._currentCopies - 1 && dir === -1)) {
          this.applyTransforms(this.pMatrix, this.rMatrix, this.sMatrix, this.tr, 1, false);
        }
        this.matrix.transform(rProps[0], rProps[1], rProps[2], rProps[3], rProps[4], rProps[5], rProps[6], rProps[7], rProps[8], rProps[9], rProps[10], rProps[11], rProps[12], rProps[13], rProps[14], rProps[15]);
        this.matrix.transform(sProps[0], sProps[1], sProps[2], sProps[3], sProps[4], sProps[5], sProps[6], sProps[7], sProps[8], sProps[9], sProps[10], sProps[11], sProps[12], sProps[13], sProps[14], sProps[15]);
        this.matrix.transform(pProps[0], pProps[1], pProps[2], pProps[3], pProps[4], pProps[5], pProps[6], pProps[7], pProps[8], pProps[9], pProps[10], pProps[11], pProps[12], pProps[13], pProps[14], pProps[15]);

        for (j = 0; j < jLen; j += 1) {
          itemsTransform[j] = this.matrix.props[j];
        }
        this.matrix.reset();
      } else {
        this.matrix.reset();
        for (j = 0; j < jLen; j += 1) {
          itemsTransform[j] = this.matrix.props[j];
        }
      }
      iteration += 1;
      cont -= 1;
      i += dir;
    }
  } else {
    cont = this._currentCopies;
    i = 0;
    dir = 1;
    while (cont) {
      items = this.elemsData[i].it;
      itemsTransform = items[items.length - 1].transform.mProps.v.props;
      items[items.length - 1].transform.mProps._mdf = false;
      items[items.length - 1].transform.op._mdf = false;
      cont -= 1;
      i += dir;
    }
  }
};

RepeaterModifier.prototype.addShape = function () {};

ShapeModifiers.registerModifier('rp', RepeaterModifier);